control System Functional Description(Feed Gas Compressor)

CONTROL SYSTEM FUNCTIONAL DESCRIPTION

LPG TRAIN-4 PROJECT AT MINA AL-AHMADI REFINERY

AS SHIPPED REVISION DESCRIPTION: REVISED SH.: 1,6÷8,12÷17,22,23,26,29,36,75,83,84,86,87,91÷93

REVISION

DOCUMENT CODE

TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION

4

SOM6629548 Stoppa L.

APPROVED

DATE

0202-AugAug-12

SECURITY CODE CHECKED

EXECUTED

Chakraborty A.

N

SIME

SCALE

REPLACES/DERIVED FROM

1st ISSUE

ORIGINAL JOB

SIZE

N/A

N/A

2828-SepSep-11

18000571800057-58

4

THIS DOCUMENT IS AND CONTAINS CONFIDENTIAL AND PROPRIETARY INFORMATION OF Nuovo Pignone S.r.l. WHICH SHALL NOT BE USED OR DISCLOSED TO OTHERS, EXCEPT WITH THE WRITTEN PERMISSION OF Nuovo Pignone S.r.l. . UNPUBLISHED WORK ©2012 2012 Nuovo Pignone S.r.l.. S.r.l.. ALL RIGHTS RESERVED.

LANGUAGE

A SHEET

1 of 94

Electronically approved draw. GE NuovoPignone DT-'N'

SOM6629548

INDEX

TABLE OF CONTENTS 1

2

3

4

START/STOP SEQUENCING 1.1 READY TO START

6 6

1.2

AUXILIARIES STARTING

7

1.3

CRANK

8

1.4

SEAL GAS HEATER AND BOOSTER STARTING LOGIC

9

1.5

IGNITION AND WARM-UP

10

1.6

ACCELERATION TO OPERATIVE SPEED

11

1.7

COMPLETE SEQUENCE

12

1.8

TURBINE SPEED CONTROL BY DCS

13

1.9

SHUTDOWN REQUEST

14

1.10

SHUTDOWN SEQUENCE

15

1.11

TRIP REQUEST

16

1.12

TRIP SEQUENCE

17

1.13

COOLDOWN SEQUENCE

18

1.14

ONLINE WATER-WASH

19

1.15

OFFLINE WATER-WASH

20

STATUS DEFINITION 2.1 AUXILIARIES START READY

22 22

2.2

AUXILIARIES START PASSED

25

2.3

AUXILIARIES CRANK READY

26

2.4

AUXILIARIES FIRE READY

27

2.5

AUXILIARIES LOAD READY

28

2.6

SHUTDOWN

29

2.7

TRIP

30

2.8

MAINTENANCE OVERRIDE IMPLEMENTATION DESCRIPTION

33

OPERATION MODES SELECTION OFF mode

34 34

CRANK mode

34

FIRE mode

34

AUTO mode

34

REMOTE mode

34

AUXILIARIES SEQUENCING 4.1 MINERAL LUBE OIL

35 35

4.1.1 DEVICE SUMMARY 4.1.2 SOFTWARE DESCRIPTION 4.2 OIL VAPOUR SEPARATOR

35 35 38

TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION

SOM6629548 PAGE MARKER N/A ORIGINAL JOB

18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

2 of 94

4.2.1 DEVICE SUMMARY 4.2.2 SOFTWARE DESCRIPTION 4.3 LUBE OIL HEATER

38 38 39

4.3.1 DEVICE SUMMARY 4.3.2 SOFTWARE DESCRIPTION 4.4 LUBE OIL WATER COOLER

39 39 40

4.4.1 DEVICE SUMMARY 4.4.2 SOFTWARE DESCRIPTION 4.5 CONTROL OIL

40 40 41

4.5.1 DEVICE SUMMARY 4.5.2 SOFTWARE DESCRIPTION 4.6 HYDRAULIC OIL

41 41 42

4.6.1 DEVICE SUMMARY 4.6.2 SOFTWARE DESCRIPTION 4.7 STARTING

42 42 44

4.7.1 DEVICE SUMMARY 4.7.2 SOFTWARE DESCRIPTION 4.8 HYDRAULIC RATCHETING

44 44 45

4.8.1 DEVICE SUMMARY 4.8.2 SOFTWARE DESCRIPTION 4.9 BEARING METAL TEMPERATURE

45 45 47

4.9.1 DEVICE SUMMARY 4.9.2 SOFTWARE DESCRIPTION 4.9.3 DEVICE SUMMARY 4.9.4 SOFTWARE DESCRIPTION 4.10 WHEELSPACES

47 47 48 48 49

4.10.1 DEVICE SUMMARY 4.10.2 SOFTWARE DESCRIPTION 4.11 SEISMIC VIBRATION

49 49 50

4.11.1 DEVICE SUMMARY 4.11.2 SOFTWARE DESCRIPTION 4.12 MAGNETIC SPEED PICK-UP

50 50 51

4.12.1 DEVICE SUMMARY 4.12.2 SOFTWARE DESCRIPTION 4.13 COMBUSTION CHAMBER FLAME DETECTOR

51 51 52

4.13.1 DEVICE SUMMARY 4.13.2 SOFTWARE DESCRIPTION 4.14 INTERFACES WITH BENTLY NEVADA VIBRATION MONITORING SYSTEM

52 52 53

4.14.1 DEVICE SUMMARY 4.14.2 SOFTWARE DESCRIPTION 4.14.3 DEVICE SUMMARY 4.14.4 SOFTWARE DESCRIPTION 4.15 EXHAUST TEMPERATURE

53 53 54 54 55

4.15.1 DEVICE SUMMARY 4.15.2 SOFTWARE DESCRIPTION 4.16 EXHAUST DUCT BACK PRESSURE

55 55 56

4.16.1 4.16.2

DEVICE SUMMARY SOFTWARE DESCRIPTION TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION

REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

56 56 DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

3 of 94

4.17

WATER WASH

57

4.17.1 DEVICE SUMMARY 4.17.2 SOFTWARE DESCRIPTION 4.18 VENTILATION

57 57 59

4.18.1 DEVICE SUMMARY 4.18.2 SOFTWARE DESCRIPTION 4.19 INLET AIR FILTRATION

59 59 62

4.19.1 DEVICE SUMMARY 4.19.2 SOFTWARE DESCRIPTION 4.20 FUEL GAS

62 62 63

4.20.1 DEVICE SUMMARY 4.20.2 SOFTWARE DESCRIPTION 4.21 LIQUID FUEL

63 64 66

4.21.1 DEVICE SUMMARY 4.21.2 SOFTWARE DESCRIPTION 4.22 FUEL TRANSFER

66 66 68

4.22.1 Fuel Splitter 4.22.2 Fuel Transfer (Liquid to Gas) 4.22.3 Fuel transfer (Gas to Liquid) 4.23 FUEL GAS BLOCK / FUEL GAS VENT VALVES

68 68 68 69

4.24

70

ATOMIZING AIR SYSTEM

4.24.1 DEVICE SUMMARY 4.24.2 SOFTWARE DESCRIPTION 4.25 SEAL GAS, SEAL GAS HEATER & SEAL GAS BOOSTER SYSTEM

70 70 72

4.25.1 DEVICE SUMMARY 4.25.2 SOFTWARE DESCRIPTION 4.26 STEAM INJECTION

72 72 75

4.26.1 DEVICE SUMMARY 4.26.2 SOFTWARE DESCRIPTION 5 ANTISURGE AND LOAD SHARING 6 FIRE FIGHTING MONITORING 6.1 ENCLOSURE FIRE DETECTION / FIGHTING:

75 75 78 79 79

6.1.1 DEVICE SUMMARY 6.1.2 SOFTWARE DESCRIPTION 6.2 FIRE FIGHTING DEDICATED PLC INTERFACE: 7 8

79 80 81

MARKVIE INTERFACES WITH OTHER SYSTEMS CONTROL INTERFACE WITH WASTE HEAT RECOVERY UNIT CONTROL SYSTEM 8.1.1 INTERLOCK SIGNALS 8.1.2 SOFTWARE DESCRIPTION


82 92 92 92

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

4 of 94

LEGEND: L14HSX: L4: 14HR: L62CD: L2TVX: L28FDX: L1X: SIS: FSR: DCP:

MINIMUM OPERATING SPEED MASTER PROTECTIVE RELAY SHAFT ZERO SPEED COOLDOWN END IGNITION TRANSFORMER ACTIVATION FLAME DETECTED MASTER CONTROL START-UP. SAFETY INSTRUMENTED SYSTEM (MK VIeS) FUEL STROKE REFERENCE DIRECT CURRENT PANEL

GENERAL NOTE: 1. Contacts for limit switches are closed when valve is actuated to corresponding switch position. 2. For signal philosophy to MCC or DCP see UNIT CONTROL SYSTEM HARDWIRED I/O LIST (SOM6628418/3). 3. The software macro performs a position check on each valve command output transition, after a “max positioning time” if the relevant limit switch input is not verified a position mismatch Alarm is generated. Moreover the position mismatch Alarm becomes active immediately if both limit switch inputs are closed. 4. The scope of this specification is to give a functional description of its auxiliary sequences. This document does not cover the description of CORE ENGINE LOGIC FUNCTIONS. The CORE ENGINE LOGIC FUNCTIONS software section contains algorithms for combustion chambers flame detection, firing temperature calculation, speed/load regulator/protection, acceleration regulators, exhaust temperature averaging regulator and protection, inter stage pressure regulator. These algorithms shall be considered GE proprietary information and are excluded from this specification.

REFERENCE DOCUMENTS: GE-NP DOCUMENTS Piping & Instruments Diagram Cause & Effect Diagram UCS IO List Control System & Power Supply Schematic CCC Control System Description Field Instrument List Communication List CCC Modbus List

SOM5081820/1 SOM6629813/3 SOM6628418/3 SOM5464708/3 SOM6629507/4 SOM6628002/3 SOM6629523/3 SOM6629508/4

NOTE: • ~ Symbol indicate NOT signal operation • Median function is used in Mark Vie logic where 2oo3 function is required • Spread alarm for 2oo3 signals will be active as follow: if the difference between the maximum and the minimum values of the three variable becomes greater than or equal to the specified constant. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

5 of 94

1 START/STOP SEQUENCING 1.1

READY TO START

Figure 1 - Ready to start

TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

6 of 94

1.2

AUXILIARIES STARTING

Figure 2 - Auxiliaries starting TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

7 of 94

1.3

CRANK External Sequences

Turbine and Auxiliaries Sequences

Sequences

From Sh. 07

B

Customer valve sequencing start

4VALV (231-XS-0256) <4>

Start process valve positioning

Off-line water wash selection on HMI

Yes

No

Water wash system start (1)

No Hot Bypass valve open command for purge Hot Bypass valve open / close feedback (1= Open; 0 = close)

Aux. Ready to crank? Open Hot Gas Bypass Valve

End of Sequence

Yes

Close Anti-surge valve for Purge

AND

Anti-surge valve open / close feedback (1= Closed; 0 = Open)

Close Anti-surge Valve command to CCC

See TABLE 5 Auxiliary ready to Crank -Ratchet system activation -Starting system activation

Close Anti-surge valve

Valve sequence ended; Customer Permissive to Crank

No TNH Above zero speed?

3CRC

(231-XS-0258 RS) <4> Yes 14HMX

PESD

-Ratchet system de-activation -Solenoid valve 20HD-1 closed

(231-XS-253C)

Unit in Crank

No TNH Above Crank speed?

Notes:(1) Note that if water wash is selected ready to start and start passed conditions changes from the above described

Yes CRANK

WHRU CTRL GT Purge Done

231-XS-0955

<4>

Yes

WHRU dampers in By-Pass position? No Purge Timer Reset

WHRU CTRL WHRU Purge Sequence GT Purge Time elapsed? Yes L2TV=1

WHRU CTRL WHRU Purge Timer Elapsed

No

231-XS-960

No

WHRU Purge Done? Yes

WHRU CTRL Damper Status

231-XS-554 or 231-XS-654

WHRU dampers in By-Pass position?

No

C

Yes

To Sh. 09

Figure 3 –Crank


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

8 of 94

1.4

SEAL GAS HEATER AND BOOSTER STARTING LOGIC

Figure 4 – Seal Gas Heater and Booster Starting Logic


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

9 of 94

1.5

IGNITION AND WARM-UP

Figure 5 - Ignition and warm-up


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

10 of 94

1.6

ACCELERATION TO OPERATIVE SPEED

Figure 6 - Acceleration to operative speed TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

11 of 94

1.7

COMPLETE SEQUENCE

Figure 7 - Complete sequence TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

12 of 94

1.8

TURBINE SPEED CONTROL BY DCS

Figure 8 – Turbine Speed Control by DCS TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

13 of 94

1.9

SHUTDOWN REQUEST

Figure 9 - Shutdown request


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

14 of 94

1.10 SHUTDOWN SEQUENCE

Figure 10 - Shutdown sequence TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

15 of 94

1.11 TRIP REQUEST External Sequences

Turbine and Auxiliaries Sequences

Trip sequence

- Crank - Fire - Manual - Auto Master Selector

- Remote

PESD CESD-1, CESD-2

Customer ESD signal

Customer Trip?

(231-XS-700A) (231-XS-700B)

YES

No

Trip from HMI?

L To Sh.6, 17

YES L To Sh. 6, 17

No

DCS 4CT

Process Remote Trip

(231-XS-0257T)

See Table 9 Trip from Auxiliaries

<4>

No YES

Aux Trip?

No

Yes

Core Engine Trip?

L

To sh. 06, 17 No

End sequence

Figure 11 - Trip request


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

16 of 94

1.12 TRIP SEQUENCE

Figure 12 - Trip sequence TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

17 of 94

1.13 COOLDOWN SEQUENCE

Figure 13 - Cooldown sequence


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

18 of 94

1.14 ONLINE WATER-WASH

Figure 14 – Online Water-wash


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

19 of 94

1.15 OFFLINE WATER-WASH


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

20 of 94

Figure 15 – Offline Water-wash


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

21 of 94

2 STATUS DEFINITION 2.1

AUXILIARIES START READY

Table1 Ready to start from Other Systems LOGIC

SOFTWARE TAG L33as_o

NOT NOT

l86asc L86as1

NOT

l86ls L3COMM_IO

NOT NOT NOT

l86ps1 l86ps2 l86psfg

NOT NOT NOT

l86psf l86ps3 l80x

NOT

l30ra

JOB TAG(GE TAG) 231-ZSH-5001A 231-XS-807A (86AS) (31-XS-808B (86LS) 231-XS-601A (86PS-1) 231-XS-601B (86PS-2) 231-XS-602 (86PS-FG) 231-XS-603 (86PS-FIELD) 231-XS-610 (86PS-3) 231-XS-207 (DCP-80X) 231-XS-206A (DCP-30RA)

NOT

ldcp_bad 231-XS-208A (DCP-BD) 231-XS-863 (-) <4> 231-XS-864 (-) <4>

NOT NOT NOT

l86vmn

NOT

l86tm

NOT

l86cr

NOT

l33cp_c

231-XS-515L (86CR) 231-XS-144 (33CP-1)

NOT

l86fg

231-XS-652 SF (86FF-1)

NOT

L71GFH_W

NOT

L86PS_110V AC_TRVIEW L86PS_24VD C_TRVIEW FF_NSD

231-LIT-5039A/B/C (71GF2/3/4A) OR, 231-LIT-5043A/B/C (71GF2/3/4B) 231-XS-612 A

231-YS-402F (86VM) 231-YS-451F (86TM)

NOT NOT

L3crs

231-XS-613 A 231-XS-652 IF (86FF_SD) 231-XS-0250 RS (3CRS) <4>


DESCRIPTION

SYSTEM

Anti-surge control valve open position-ASV 1 Anti-surge controller fault Anti-surge control valve 1 position failure Master controller fault MKVIe IO pack communication OK 24Vdc Bus 1 failure 24Vdc Bus 2 failure Fire Fighting 24Vdc Bus failure Field 24Vdc Bus failure 110Vdc Bus failure Minimum battery voltage alarm DCP rectifier “A” common alarm DCP-battery “A” discharging GROUND FAULT + GROUND FAULT Vibration monitor common fault alarm Temperature monitoring fault Cranking motor protective lock-out Fire fighting Inergen discharge valve closed FF system fault alarm

Process (ASC)

Fuel gas scrubber level high alarm

110 Vac Bus Failure at TV server panel 24 Vdc Bus Failure at TV server panel FF Input fault- Normal shutdown Customer ready to start

Process (ASC) Process (ASC) Process (MCP) Misc-MarkVIe Misc-PS Misc-PS Misc-PS Misc-PS Misc-PS Misc-DCP Misc-DCP Misc-DCP Misc-DCP Misc-DCP Misc- BN3500 VIB Monitor Misc- BN3500 TEMP Monitor Misc- Starting Motor Fire Fighting monitor Fire Fighting monitor Customer ESD

MISC-PS MISC-PS FF DCS

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

22 of 94

LOGIC

JOB TAG(GE TAG)

DESCRIPTION

SYSTEM

NOT

SOFTWARE TAG L86FTL

231-XA 5015 (-)

LF thyristor Panel

NOT NOT

L27mc1n L49x

231-XS-134 (27MC) 231-XS-135 (49X)

NOT NOT

L74x_mcc L45hsa_o

231-XS-136 (74X-MCC) 231-XS-736 (45HSA)

Liquid fuel thyristor panel fault Undervoltage from MCC Common overload from MCC Drawer Common Alarm Acc compt H2S detected alarm Hot Gas Bypass Valve Close Limit Switch Diverter System Close Seal Gas thyristor Panel fault

231-ZSL-2055 (-)

NOT

231-XS-554 (-) 231-UA-5209A (TH1_F)

L86thy

MCC MCC MCC MarkVIe MarkVIe MarkVIe Thy Panel

Table2 Ready to start from Auxiliaries LOGIC NOT NOT

SOFTWARE TAG L71QL_W l27qel

JOB TAG(GE TAG)

DESCRIPTION

SYSTEM

231-LIT-5086A (96QL1)

Lube oil tank level low alarm Lube oil emergency pump fault Lube oil tank temperature normal Hydraulic protective trouble Hydraulic ratchet pump overload alarm Hydraulic ratchet pump under-voltage alarm Turbine compartment outlet temp high alarm Turbine enclosure ventilation inlet damper open Turbine enclosure ventilation outlet damper#1 open Turbine enclosure ventilation outlet damper#2 open Turbine enclosure ventilation outlet damper#3 open Coupling compartment outlet temperature high alarm Fuel gas warm-up vent valve closed Fuel gas pressure high alarm

Lube oil Lube oil

Inter-valve fuel gas pressure high Fire fighting Inergen discharge valve open

Fuel gas system

NOT NOT

SIS1.L86HD l49hr1a

231-XS-851B (49QE) <4> 231-TE 5088AA (LT-OT-1) 231-XS-200O (49HR-1)

NOT

L27hr1a

231-XS-200U (27HR-1)

NOT

L26BA

231-TE-5241A1/A2/A3 (TT-BA-2A/B/C) 231-ZSH-5242A (33ID-1)

L26qn_W

l33ido

NOT

Note1

l33odo1

Note1

l33odo2

Note1

l33odo3

Note1

L26BA_1 l33vg2_c

NOT

L63FGH_W

NOT

L63FGH1_W l33cp

NOT

L33PV3_o

231-ZSH-5243A (330D1) 231-ZSH-5244A (330D2) 231-ZSH-5245A (330D3) 231-TE-5242A1/A2/A3 (TT-BA-3A/B/C) 231-ZSL-5009A (33VG-2) 231-PIT-5003A (96FG-1) 231-PIT-5005A1/A2/A3 (96FG-2A/B/C) 231-ZSH-5265A (33CP1A); 231-ZSH-5266A (33CP1D) 231-ZSH 5007 A (33PV2)

TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED NO REVISION WHERE INTRODUCED SHOWN <4> IN THIS PAGE

Nozzle Purge Air Vent valve open

Lube oil Control oil Hydraulic ratchet Hydraulic ratchet Enclosure ventilation Enclosure ventilation Enclosure ventilation Enclosure ventilation Enclosure ventilation Enclosure ventilation Fuel gas system Fuel gas system

Fire Fighting skid system

Fuel gas system

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

23 of 94

LOGIC

JOB TAG(GE TAG)

DESCRIPTION

SYSTEM

NOT

SOFTWARE TAG L33cb1o

231-ZSH 5050A (33CB-1)

Cooling & Sealing

NOT

L33cb2o

231-ZSH 5049A (33CB-2)

NOT

L33ac_c

231-ZSL-5157A (33AC-1)

VAB-1 Axial Compressor Bleed valve status Open VAB-2 Axial Compressor Bleed valve status Open Atomizing air cooler valve closed

Cooling & Sealing Oil water cooler

Note1: This permissive to start is enabled if “Water Wash On” function is not selected on the HMI (L43BW is false). Table3 Ready to start from SIS LOGIC NOT

SOFTWARE TAG l45hta2

NOT

l45hta1

NOT

l45hfa l33dtc

NOT NOT NOT NOT NOT NOT NOT

NOT

NOT

JOB TAG(GE TAG)

DESCRIPTION

SYSTEM

231-AE-5242A1/2/3 (45HD2A/B/C) 231-AE-5241A1/2/3 (45HD1A/B/C) 231-AE-5229A1/2/3 (45HF1/2/3)

Turbine enclosure gas detected alarm Accessory comp. gas detected alarm Turbine inlet air filter gas detected alarm Enclosure access door closed Master protective lockout Inter-valve gas unit rate mismatch Fuel Gas Stop valve control signal on safety GT-2 shaft selected Flame detected without fuel on Off-skid shutoff valve position mismatch Off-skid bleed valve position mismatch

SIS

Note1

L86MP

231-ZSL-5241(33DT) -

(L86VG-1)

-

L20HDX

-

GT_2SHAFT

-

L28FD_FLT

-

(L86FB)

-

(L86FV)

-

L30FORCED _SIS L86BT1_ALM L86BT2_ALM L86BT3_ALM L30LOCKED _SIS l33af1c

NOT

-

SIS forced signal detected

-

Turbine compart. /ambient. Diff. Press. TX-1/2/3 fault

-

SIS CPU locked active

231-ZSL-5229A (33AF-1) 231-ZSL-5219A (33ED-1)

NOT NOT

L86splc L4_sis

NOT

L33ED4

NOT

L33ED5

-

231-ZSL-5277A1 (33ED-4) 231-ZSL-5277A2 (33ED-5)


Turbine inlet air filter inspection. door closed Combustion Wrapper Drain valve closed Safety system fault signal Master Protective Signal (1=Fuel ON) Exhaust Plenum Drain Valve VA17-6 Closed Exhaust Plenum Drain Valve VA17-6 Closed

SIS SIS SIS SIS SIS SIS SIS SIS SIS SIS SIS SIS

SIS SIS SIS SIS SIS Water wash Water wash

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

24 of 94

Note1: This permissive to start is enabled if “Water Wash On” function is not selected on the HMI (L43BW is false).

2.2

AUXILIARIES START PASSED

Table 4 Start Passed LOGIC

SOFTWARE TAG L3PSP l52qa

NOT

L63QA2L_W

NOT

L63QAL_W L3QE_TEST

NOT

L63HQ1L_W l52hq l52bt1 OR Note2 l52bt2

NOT

NOT

L63BT_W

Note2

L63SGLA

JOB TAG)

TAG(GE

231-XS-100I (52QA-1) 231-PIT-5133 A1/2/3 231-PIT-5091A (96QA-1) 231-PIT-5114A (96HQ-1) 231-XS-104I (52HQ-1) 231-XS-108I (52BA-1) OR, 231-XS-109I (52BA-2) 231-PDIT5241A1/2/3 (96SV1A/B/C) 231-PDIT-5201 A

DESCRIPTION

SYSTEM

Process start passed Lube oil auxiliary pump running Lube oil header pressure low alarm Lube oil pump discharge pressure low alarm Lube oil emergency pump test passed Hydraulic oil pressure low alarm Hydraulic oil aux pump running Turbine-enclosure ventilation fan #1 running OR, Turbine-enclosure ventilation fan #2 running

Lube oil Lube oil Lube oil Lube oil Hydraulic oil Hydraulic oil

Enclosure ventilation

Turbine compartment diff. press low alarm

Enclosure ventilation

Seal Gas Inlet Balancing Line Differential Pressure

Seal Gas

Note2: This permissive to start is bypassed if “Compressor/turbine Water Wash Control” function is selected (L83BW is true).


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

25 of 94

2.3

AUXILIARIES CRANK READY

Table 5 Ready to Crank from auxiliaries LOGIC

NOT

SOFTWAR E TAG L3PRC L71QL_W l52qa

NOT NOT

L63QA2L_ W L63QAL_W L26QN_W

NOT

NOT

L63HQ1L_ W l52hq L26FGL_W

l33vg2_c

Note3

NOT

L63FGL_W

Note3

JOB TAG(GE TAG)

DESCRIPTION

SYSTEM

-

Process ready to crank Lube oil tank level low alarm Lube oil auxiliary pump running Lube oil header pressure low alarm Lube oil pump discharge pressure low alarm

Process

Lube oil tank temp normal

Lube oil

231-LIT-5086A (96QL1) 231-XS-100I (52QA-1) 231-PIT-5133 A1/2/3 231-PIT-5091A (96QA1) 231-TE-5088AA (LTOT-1) 231-PIT-5114A (96HQ1) 231-XS-104I (52HQ-1) 231-TE-5006AA (TG-FG-1) 231-ZSL-5009A (33VG2) 231-PIT-5003A (96FG1)

Hydraulic oil pressure low alarm Hydraulic oil aux pump running Fuel gas temp low alarm Master selector in “crank” position Fuel gas vent valve closed Fuel gas alarm

pressure

low

Off-skid gas shut-off valve open

Note3

NOT

AND Off-skid gas vent valve Note3 closed L63NCP_W L3crc L33prc

Lube oil

Lube oil Lube oil

Hydraulic oil Hydraulic oil Fuel gas Fuel gas Fuel gas

Fuel gas

(33FB-O) AND (33FV-1)

Process valve crank position

ready

231-PIT 5063 (96NCP1) 231-XS-0258 RS (3CRC) <4> SIS1.L33FB_O & SIS1.L33FV_C

Bearing cooling Pressure Low

to

Air

Customer ready to crank Process valve crank Position

Ready to

Process Process

Note3: This permissive to start is bypassed if “Compressor/turbine Water Wash Control” function is selected (L83BW is true).


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

26 of 94

2.4

AUXILIARIES FIRE READY

Table 6 Ready to Fire from auxiliaries LOGIC

NOT

SOFTWARE TAG L3PRF L63HQ1L_W

NOT NOT

L43BW L83BW

NOT

L63FGL_W

NOT

L26FGL_W l33vg2_c

NOT

L63NCP_W

JOB TAG(GE TAG) 231-PIT-5114A (96HQ-1) 231-PIT-5003A (96FG-1) 231-TE-5006AA (TG-FG-1) 231-ZSL-5009A (33VG-2) 231-PIT 5063 (96NCP-1)


DESCRIPTION

SYSTEM

Process ready to fire Hydraulic oil pressure low alarm Water-wash on selected Turbine/compressor water wash control

Process Hydraulic oil

Fuel gas pressure low alarm

Fuel gas

Fuel gas alarm

Fuel gas

temperature

low

Fuel gas vent valve closed

Water-wash Water-wash

Fuel gas

Bearing Cooling Air Pressure Low

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

27 of 94

2.5

AUXILIARIES LOAD READY

Table 7 Ready to load from auxiliaries LOGIC SOFTWAR JOB TAG(GE E TAG TAG) L3PRL NOT l52qa 231-XS-100I (52QA-1) l72qez 231-XS-851-A (52QE-1) NOT L52hq 231-XS-104I (52HQ-1)


DESCRIPTION

SYSTEM

Process ready to load

Process

Lube oil aux pump running

Lube oil

Lube oil emergency pump stopped Hydraulic oil aux pump running

Lube oil Hydraulic oil

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

28 of 94

2.6

SHUTDOWN

Table 8 Shutdown from auxiliaries LOGIC SOFTWAR JOB TAG(GE E TAG TAG) L94PSHD L63TF 231-PDIT5231A1/2/3 (96TF-1A/B/C) L30WSA4_ 231-TE-5082/A1 ALM (TT-WS1AI-1) OR 231-TE-5082/A2 (TT-WS1AI-2) OR 231-TE-5079/A1 (TT-WS1FI-1) OR 231-TE-5079/A2 (TT-WS1FI-2) OR 231-TE-5080/A1 (TT-WS2FI-1) OR 231-TE-5080/A2 (TT-WS2FI-2) OR 231-TE-5081/A1 (TT-WS2AI-1) OR 231-TE-5081/A2 (TT-WS2AI-2)

S1STPSEL

TAH-208 TAH-211 TAH-212 TAH-213 231-TE5158/A1A/2A/3A (AAT-1A/B/C) 231-TIT5013A1/A2/A3 231-XS-652-IF (86FF_SD) 231-XS-0257 S (1STOP) <4>

DESCRIPTION

SYSTEM

Process shut-down command

Process

Turb inlet filter diff. press. High vot. Shutdown logic

Inlet and Filtration Wheel-space

Wheel-space shutdown logic

Wheel-space Wheel-space temperature high Note4 alarm Atomizing air temperature high high shutdown Liquid Fuel Temperature low low Fire Fighting Input fault normal shutdown

Atomizing air

Liquid Fuel System Fire Fighting System DCS

Process remote Stop

gthrsgds_sd

GT shutdown for HRSG Shutdown & Diverter System Failure to Close Note4: Shutdown is started if wheel-space temperature is high for 24 hours

PESD

231-XS-354


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

29 of 94

2.7

TRIP

Table 9 Trip from auxiliaries LOGIC

SOFTWARE TAG

JOB TAG(GE TAG)

DESCRIPTION

SYSTEM

231-TE-5210A1/2/3

Compressor primary vent pressure (depressurized trip) Nitrogen gas header pressure low low Primary vent pressure (depressurized trip) Buffer gas Temp low low. (depressurized trip)

-

Surge trip

ASC

L26QT

231-TE-5159A1/2/3 (LT-TH-1A/B/C)

Lube oil header temperature high voting trip logic

Lube Oil

L63QTX

231-PIT-5133 A1/2/3

Lube oil pressure low voting trip aux. logic

Lube Oil

L63QVT

231-PDIT-5087A1/2/3 (96QV-1A/B/C)

Lube oil tank pressure high voting trip logic

Lube Oil

231-PDIT-5204A1/2/3 231-PIT-5195A1/2/3 231-PDIT-5205A1/2/3 (L26TSGLL) L4surge_1

L4QE_TRP L3SMTX

231-TE-5241A1/2/3 (TT-BA-2A/B/C)

L26BT

L4CETRIP L4T_S L4T_FGS (L4T)

231-TE-5242A1/2/3 (TT-BA-3A/B/C) -

-

231-ZT-5133A1/2/3

-

231-XT-5133A1/A2

-

231-XT-5134A1/A2

-

231-TE5139A1A/2A//3A 231-TE5140A1A/2A/3A 231-SE-5061A1/2/3 (77NH-1÷3) 231-SE-5063A1/2/3 (77NL-1÷3) 231-TE-5076A1 to 231-TE-5076A13 (TT-XD-1 to TT-XD13)


Lube oil emergency pump trip logic Starting motor trip logic GT compartment internal temperature high trip Core Trip Cumulative safety trip to MKVIe Fuel Gas Scrubber Trip Signal Trip Notification from MKVIe Axial Displacement of Compressor bearings High High Radial Vibration on Compressor bearings High High Radial Vibration on Compressor bearings High High Thrust bearing temperature high high Thrust bearing temperature high high HP Shaft Speed – Safety System LP Shaft Speed – Safety System Exhaust Thermocouple

Seal Gas System Seal Gas System Seal Gas System Seal Gas System

Lube Oil Hydraulic

Ventilation System

UCS SIS DCS SIS BN 3500 (Vib) BN 3500 (Vib) BN 3500 (Vib) BN 3500 (Temp) BN 3500 (Temp) Control & Protection Control & Protection Control & Protection

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

30 of 94

LOGIC

SOFTWARE TAG L28FDT L3SFLT L4ATOMPU R L45FTT

JOB TAG(GE TAG) 231-BE5061A1/A2/A3/A4 (28FD-2/3/10/11) 231-TE5158A1A/2A/3A 231-XS-657 T 231-PDIT-5217A 231-VE-5061A1/A2 (39V-1A/B) 231-VE-5062A1/A2 (39V-2A/B)

DESCRIPTION

SYSTEM

Loss of flame detected

Control & Protection

Control system fault Atomizing Air Cooler Discharge Temp low low Fire detected trip CE/CO Inlet Filter high high

UCS (Mark Vie) Atomizing Air Cooler FF System UCS (Mark VIe)

HP Shaft Vibration high high

BN 3500 (Vib)

HP Shaft Vibration high high

BN 3500 (Vib)

DESCRIPTION

SYSTEM

Table 10 Trip from Safety system LOGIC

SOFTWARE TAG

JOB TAG(GE TAG) (5ESD-R1) (5ESD-R2)

L5LESD1

231-HS-5254A (5ESD-1)

L5LESD2

231-HS-5253A (5ESD-2)

L63CO_TRP L4BTLOSS

231-PIT-5121A1/2/3 (96HG-1A/B/C) 231-PDIT-5241A1/2/3 (96SV-1A/B/C)

(L4PV)

-

(L4T)

-

L6FGEX

L63ETH

L28FDT L5cesd1 L5cesd2

231-SE-5061A1/2/3 (77NH-1÷3) 231-SE-5063A1/2/3 (77NL-1÷3) 231-PDIT5067A1/A2/A3 (96EA-1A/B/C) 231-BE5061A1/A2/A3/A4 (28FD-2/3/10/11) 231-XS-700 A (CESD-1) 231-XS-700 B (CESD-2)


Front panel ESD push button (pressurized trip) Front panel ESD push button (depressurized trip) Turbo unit emergency shutdown button (depressurized trip) Turbo unit emergency shutdown button (depressurized trip) Control oil header pressure low voting trip logic Enclosure loss of ventilation trip Depress. trip Notification from MKVIe Trip Notification from MKVIe SIS fuel gas flow excessive trip (only during start-up) HP Shaft Speed – Safety System LP Shaft Speed – Safety System

UCS UCS Enclosure Turbine

Enclosure Turbine Control Oil Ventilation System SIS SIS Fuel Gas Control & Protection Control & Protection

Exhaust Duct Back Pressure


Loss of flame detected


Customer ESD Signal

PESD

Customer ESD Signal

PESD

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

31 of 94

LOGIC

SOFTWARE TAG

JOB TAG(GE TAG) 231-AE 5241\A1/A2/A3 (45HD-1A/B/C) 231-AE 5242\A1/A2/A3 (45HD-2A/B/C)


DESCRIPTION

SYSTEM

Acc. Compart. Vent. Outlet Gas Detector high high Acc. Compart. Vent. Outlet Gas Detector high high

UCS (Mark VIeS)

UCS (Mark VIeS)

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

32 of 94

2.8

MAINTENANCE OVERRIDE IMPLEMENTATION DESCRIPTION

Following is a functional description of the implementation for maintenance overrides required for single (1oo1) trip input devices to the MKVIe system. Maintenance override shall be enabled by operator from HMI. When the MKVIe receives the MOS enable signal from HMI, the MKVIe logic enables this function. The number of instruments under MOS will be transmitted to DCS via the DCS - MK VIe serial link. The MKVIe HMI is configured with a Maintenance Override selection screen which shows all of the field devices capable of being put on override. When the MKVIe receives the MOS enable signal from HMI, a transmitter selected to be overridden can be selected on the MKVIe screen through password protection. Once the transmitter input is selected, the trip from this input will be overridden in the logic and the MKVIe shown on HMI “GT MOS ON” indication shown on the MKVIe HMI This “GT MOS ON” indication should be maintained for the duration of the override. The MKVIe logic includes an interlock such that only one trip input for voting function may be overridden at a time (i.e. selection of a transmitter to override when another transmitter of the same voting function is already on override shall not be possible). While an input signal is on override, the trip function from that input will be temporarily inhibited for the duration of the maintenance activity. However, the logic should be configured to allow the alarm functionality to remain active during this time in order to allow testing of the device after maintenance and before removing the override (i.e. before return to normal service). A MOS repeating alarm is sent from the MKVIe to DCS via the serial link once every hour, to warn the plant operations personnel that a transmitter is on override. After confirmation that the individual device/signal is ready to be restored to normal operation, the MOS is cancelled (override is removed) by removing the MOS from the individual instrument (not by resetting the MOS switch). When the selector switch is moved to “cancel” the DCS will send a momentary “MOS Cancel” signal to MKVIe via the serial link.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

33 of 94

3 OPERATION MODES SELECTION Unit Operational Mode selection shall be performed by means of a software selector on UCS HMI called MASTER SELECTOR. The following operational modes are defined: • OFF • CRANK • FIRE • AUTO • REMOTE • MANUAL Only one mode can be selected or set at any time. Mode selection is possible only if the relevant permissive conditions are met as indicated below. Switching to AUTO and REMOTE is always possible; the only exception is the Off-Line Water Wash condition that locks the selector in CRANK. Switching from/to different modes is allowed only under specific conditions (see below paragraphs for details).

OFF mode OFF mode is automatically set upon system initialization (i.e. UCS power-up). Off Mode can only be selected by the operator when the GT has come to a complete stop. If the master selector is in OFF mode no kind of starting sequence can be run, because the machine is not ready to start and any kind of start command is ignored.

CRANK mode In CRANK mode the engine is allowed to complete crank phase only, reaching purge/firing speed: all other following sequencing phases can be then completed changing the Master Selector position. Switching to OFF is possible before start up is initiated. This Master Selector position also enables OFF LINE WATER WASH selection until start up is initiated (pushing START button). In case of Off-Line Water Wash sequence activation no other following sequence can be completed: Master Selector remains locked to “Crank” position until Water Wash sequence ends as a consequence of a normal stop or trip command.

FIRE mode In FIRE mode the ignition phase is allowed, the turbine can reach the “flame-on” status and the sequence stops to warm-up. It is possible to switch back to CRANK only before firing and to OFF before start up is initiated.

AUTO mode In AUTO mode the complete start-up procedure can be executed, bringing centrifugal compressor at minimum operating speed; after that load control are managed by external load set-point. It is possible to switch back to FIRE only if warm up is not ended yet, to CRANK before firing, to OFF before start up is initiated.

REMOTE mode REMOTE mode is equivalent to AUTO, but the start command is given by a remote system (i.e. the CMS) while the stop command can be generated both remotely and locally.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

34 of 94

4 AUXILIARIES SEQUENCING 4.1

MINERAL LUBE OIL

4.1.1 DEVICE SUMMARY DEVICE NAME TL-1 PL-1 PL-2 PL-3 88QA-1 88QE-1 FL-1A/B 96QL1 LT-TH-1A LT-TH-1B LT-TH-1C LT-BT1D LT-BID LT-B2D LT-B3D LT-B4D ------96QQ-1 96QA-1 LT-OT-1 96QV-1A/B/C

CUSTOMER TAG C-231-001A-TK2 C-231-001A-P5 C-231-001A-P6 C-231-001A-P7 C-231-001A-P6-M C-231-001A-P7-M C-231-001A-F13A/B 231-LIT-5086A 231-TE-5159A1A 231-TE-5159A2A 231-TE-5159A3A 231-TE-5097A 231-TE-5098A 231-TE-5099A 231-TE-5100A 231-TE-5101A 231-PIT-5133A1 231-PIT-5133A2 231-PIT-5133A3 231-PDIT-5094A 231-PIT-5091A 231-TE-5088AA 231-PDIT-5087A1/A2/A3

DESCRIPTION LUBE OIL TANK (ACCESSORY BASE) MAIN LUBE OIL PUMP AUXILIARY LUBE OIL PUMP EMERGENCY LUBE OIL PUMP AUXILIARY LUBE OIL PUMP MOTOR EMERGENCY LUBE OIL PUMP MOTOR LUBE OIL DUPLEX FILTERS LUBE OIL TANK LEVEL LUBE OIL HEADER TEMPERATURE LUBE OIL HEADER TEMPERATURE LUBE OIL HEADER TEMPERATURE THRUST BRG. #1 DRAIN OIL TEMPERATURE JOURNAL BRG. #1 DRAIN OIL TEMPERATURE JOURNAL BRG. #2 DRAIN OIL TEMPERATURE JOURNAL BRG. #3 DRAIN OIL TEMPERATURE JOURNAL/THRUST BRG.#4 DRAIN OIL TEMP. LUBE OIL HEADER PRESSURE LUBE OIL HEADER PRESSURE LUBE OIL HEADER PRESSURE LUBE OIL FILTER DIFF. PRESSURE LUBE OIL PUMP DISCHARGE PRESSURE LUBE OIL TANK TEMPERATURE LUBE OIL TANK PRESSURE

4.1.2 SOFTWARE DESCRIPTION Auxiliary pump logic Request during unit startup During startup, if permissive from process is detected (tertiary seal header pressure not low), the auxiliary pump starts when the turbine start sequence is activated. It continues to operate until the HP shaft reaches minimum operating speed (L14HSX). From this point, the main mechanical lube oil pump will provide the necessary oil pressure. The pump can also be started if one of the following conditions is verified: Process hydraulic oil request Request during normal operation When HP shaft is above minimum operating speed, the auxiliary pump starts if one of the following conditions is verified for more than 2.5 s: The lube oil header pressure is detected low by 231-PIT-5133A1, 231-PIT-5133A2, 231-PIT-5133A3 The lube oil pumps discharge pressure is detected low. (96QA-1 (231-PIT-5091A) ). During normal operation, when auxiliary pump start is detected by 52QA-1 (231- XS-100I), alarm is generated. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

35 of 94

Stop during normal operation If, during normal operation, the pump has been started, detected by 52QA-1 (231- XS-100I), the pump remains running also if starting conditions are reset. Operator from HMI or from MCC can stop it manually. Request during shutdown After a unit shutdown, the auxiliary pump is started when the HP shaft decreases below the minimum operating speed. The pump remains running till the cool down is completed (L62CD). Manual control If lube oil tank level is not detected low by 96QL1 (231-LIT-5086A), auxiliary pump can be manually started. If manual operation is de-selected, the pump return to automatic control and can be stopped as described above. Emergency pump logic The emergency pump provides lube oil pressure in case of failure of auxiliary pump. It is requested to run each time the lube oil pressure is detected low by median value of 231-PIT-5133A1, 231-PIT-5133A2 and 231-PIT-5133A3. The emergency pump actually runs if one of the following enabled conditions is detected: During normal operation: after start passed (L4) or if GT shaft is detected moving. During cool down: the first time slice (15 min) of cool down, the emergency pump is always enabled. Then it is periodically enabled starting with ON period of length 30s and an OFF period of length 3 min. This mode ends when cool down is ended (L62CD). Once emergency pump has started, it stops when the pressure is detected normal by median value of 231PIT-5133A1, 231-PIT-5133A2 and 231-PIT-5133A3. Alarms and trips If emergency pump is detected running by feedback (52QE-1), alarm is generated. <4> If lube oil emergency pump overload is detected (49QE), alarm is generated Lube oil alarm and trips If lube oil header temperature LT-TH-1A (231-TE-5159A1A), LT-TH-1B (231-TE-5159A2A), LT-TH-1C (231-TE-5159A3A) is detected higher than High Alarm threshold, alarm is generated. If lube oil header temperature LT-TH-1A (231-TE-5159A1A), LT-TH-1B (231-TE-5159A2A), LT-TH-1C (231-TE-5159A3A) is detected very high by voting trip logic, trip and alarm are generated. If lube oil header pressure which is median of 231-PIT-5133A1, 231-PIT-5133A2 and 231-PIT-5133A3, is lower than the low threshold alarm is generated. Also alarm is generated after start-passed (L4) till cool down end. If lube oil header pressure is detected low low by 231-PIT-5133A1, 231-PIT-5133A2 and 231-PIT5133A3 voting trip logic trip is generated. Also trip and alarm are generated if unit is running (L4). If lube oil pumps discharge pressure is detected low 96QA-1 (231-PIT-5091A), output is generated. Also alarm is generated after start-passed (L4) till cool down end. If lube oil filter differential pressure is detected high (96QQ-1 (231-PDIT-5094A) ) for more than 1 s, alarm is generated If lube oil tank level is detected high by 96QL1 (231-LIT-5086A), alarm is generated. If lube oil tank level is detected low by 96QL1 (231-LIT-5086A), alarm is generated If at least one bearing drain oil temperature is detected higher than its threshold, summarized alarm is generated. Cooldown After the coast down, cooldown indicate the time period in which the lube oil is provided by using the auxiliary or the emergency pumps. Cooldown is enabled each time the flame is detected in combustion chamber (28FDX signal from MKVIe) resetting cooldown timer. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

36 of 94

Cooldown timer starts counting after a coast down as soon as the GT shaft is detected at zero speed (L14HR) (signal from MKVIe). Cooldown will be completed after 10 hours. Cooldown end is detected by signal L62CD signal. The VTR-1 valve is actuated on the base LT-TH-1A (231-TE-5159A1A), LT-TH-1B (231-TE-5159A2A), LTTH-1C (231-TE-5159A3A) signal; inside the software an internal PI controller is activated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

37 of 94

4.2

OIL VAPOUR SEPARATOR

4.2.1 DEVICE SUMMARY DEVICE NAME PDS-1 QV-1 QV-2

CUSTOMER TAG C-231-001A-F18 C-231-001A-BL2A C-231-001A-BL2B

88QV-1

C-231-001A-BL2A-M

88QV-2

C-231-001A-BL2B-M

DESCRIPTION MINERAL OIL VAPOUR SEPARATOR MAIN VAPOUR EXTRACTOR AUXILIARY VAPOUR EXTRACTOR MAIN MINERAL OIL VAPOUR SEPARATOR FAN MOTOR AUXILIARY MINERAL OIL VAPOUR SEPARATOR FAN MOTOR

4.2.2 SOFTWARE DESCRIPTION Oil vapor separator fan sequence Two vapor separator fan motors are provided: Fan selection (main, auxiliary) is done by HMI dedicated pushbuttons, normally when both fans are stopped. Selection can be changed, also if main fan is running. At changeover, the new selected main fan starts immediately; the deselected fan continues to run for 10 seconds, then it is stopped. This changeover sequence doesn't activate auxiliary fan running alarm. If changeover is done when both fans are running or both are stopped, nothing changes except the selection. Manual fans command If all start permissive conditions are verified and all cutoffs conditions are not verified, each fan can be manually started and stopped. The main lube oil vapor separator fan motor is started when the flame is detected in the combustion chambers. The fan continues to run until the cooldown sequence is completed (L62CD). The fan is also started if the following conditions are all verified: Lube oil heater ON command Normal temperature in oil tank. Oil vapor separator fan manual operation When fan extractor is not required running, the lube oil vapor separator fan motor 88QV-1 can be manually started and stopped. Lube oil tank pressure alarms and trips If lube oil tank pressure is detected high 96QV-1A/B/C (231-PDIT-5087A1/A2/A3), alarm is generated and the auxiliary vapor separator fan motor is started. If lube oil tank pressure is detected very high (trip level) by voting logic 96QV-1A/B/C (231-PDIT5087A1/A2/A3), trip and alarm are generated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

38 of 94

4.3

LUBE OIL HEATER

4.3.1 DEVICE SUMMARY DEVICE NAME 23QT-1 23QT-2 23QT-3

CUSTOMER TAG C-231-001A-H5A C-231-001A-H5B C-231-001A-H5C

49QT-1

231-TSHH-5085A

49QT-2

231-TSHH-5086A

49QT-3

231-TSHH-5087A

DESCRIPTION LUBE OIL ELECTRIC HEATER LUBE OIL ELECTRIC HEATER LUBE OIL ELECTRIC HEATER LUBE OIL HEATER CUT-OUT SIGNAL TO MARKVIE LUBE OIL HEATER CUT-OUT SIGNAL TO MARKVIE LUBE OIL HEATER CUT-OUT SIGNAL TO MARKVIE

4.3.2 SOFTWARE DESCRIPTION The unit it’s also equipped with 23QT1/2/3 lube oil heaters. The purpose of lube oil heater system is to provide a correct viscosity of mineral lube oil acting on its temperature. To provide heater start/stop commands, the system is equipped with the temperature element LT-OT-1 (231TE-5088AA). Heater cutout logic Cutout conditions for lube oil heater on command auxiliary signal are listed below: Lube oil tank level low 96QL1 (231-LIT-5086A) Flame detected (L28FDX) Over-temperature detected by all lube oil tank heaters temperature switches 49QT-1/2/3 (231-TSHH5085A/5086A/5087A) Each heater is then singularly cutout if the relative switch 49QT-1/2/3 (231-TSHH-5085A/5086A/5087A) detects over-temperature. Also, cutout signal is repeated to MCC namely 4QT1_C (231-XS-720), 4QT2_C (231-XS-722), 4QT3_C (231-XS-723) if one of the following conditions is detected: Lube oil tank level low 96QL1 (231-LIT-5086A) Over-temperature detected by the lube oil tank heater temperature switches 49QT-1/2/3 (231-TSHH5085A/5086A/5087A) If over-temperature is detected by at least one lube oil tank heater temperature switches 49QT-1/2/3 (231TSHH-5085A/5086A/5087A) alarm is generated. Heater control logic If no cutout condition is active for the heater on, 23QT1/2/3 are started when the oil temperature is detected low by the low threshold on LT-OT-1 (231-TE-5088AA) temperature value. They are stopped when the oil temperature is detected moderate by the high threshold on LT-OT-1 (231-TE-5088AA). Between the two thresholds, 23QT-1/2/3 can be manually stopped down also by HMI pushbutton. If manual command is active, 23QT-1/2/3 can be started and stopped manually by HMI pushbutton. Also, if manual operation is active an alarm is generated. If oil temperature is below a low low threshold, an alarm is generated. It inhibits the turbine start and crank.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

39 of 94

4.4

LUBE OIL WATER COOLER

4.4.1 DEVICE SUMMARY ---

DEVICE NAME

CUSTOMER TAG 231-TY-5159A

VTR-1

231-TCV-5159A

DESCRIPTION VTR-1 THERMOSTATIC VALVE CONTROL I TO P CONVERTOR LUBE OIL THERMOSTATIC VALVE

4.4.2 SOFTWARE DESCRIPTION Start-Up and Normal Operation The Lube Oil Temperature Regulator Valve VTR-1 (231-TCV-5159A) is enabled to control (set point=55°C) the lube oil header temperature LT-TH-1A (231-TE-5159A1A), LT-TH-1B (231-TE-5159A2A), LT-TH-1C (231-TE-5159A3A) at the beginning of the Start-up sequence, just after the Emergency Auxiliaries Check, and it is disabled and close at the end of the cool-down subsequently to the stoppage of the Lube Oil Auxiliary Pump 88QA-1(C-231-001A-P6-M). 231-TCV-5159A (VTR-1) valve will be controlled by MKVIE through 4-20mA command to I/P converter 231TY-5159A. Manual Operation This is a “One State Auxiliary”, manual mode is not permitted at all.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

40 of 94

4.5

CONTROL OIL

4.5.1 DEVICE SUMMARY DEVICE NAME 65NV-1 90TV-1 96TV-1 96TV-2 96NC-1 96NC-2 20HD-1 20HD-2 96HG-1A 96HG-1B 96HG-1C

CUSTOMER TAG 231-FCV-5124A 231-FCV-5125A 231-ZT-5125A1 231-ZT-5125A2 231-ZT-5124A1 231-ZT-5124A2 231-XX-5122A 231-XX-5123A 231-PIT-5121A1 231-PIT-5121A2 231-PIT-5121A3

DESCRIPTION NOZZLE CONTROL SERVO VALVE TURBINE IGV ACTUATION TURBINE IGV POSITION TURBINE IGV POSITION ND TURBINE 2 STAGE NOZZLES POSITION ND TURBINE 2 STAGE NOZZLES POSITION CONTROL OIL TRIP CONTROL OIL TRIP CONTROL OIL HEADER PRESS. CONTROL OIL HEADER PRESS. CONTROL OIL HEADER PRESS.

4.5.2 SOFTWARE DESCRIPTION Control oil pressure triple redundant transmitters validation (TMR) Because of this is a critical loop, TMR architecture requires triple redundancy of measurements. The three signals are median selected so that a single measurement failure is distinguished from system fails. The selected value, A63HG_W, is used for succeeding elaborations. If measurements spread is higher than maximum spread allowed K63HG_FLT for more than K63HGL_SENSR (typically 2 s), alarm L63HGL_SENSR is generated. Control oil pressure triple redundant switches (mixt) validation (TMR) Starting at ignition phase during normal operation (L4=TRUE), if one of the three switches detects trip, but trip is not detected for more than K63HGL_SENSR (typically 2 s), alarm L63HGL_SENSR is generated. In case of mixt instrumentation, same logic apply with one switch reading substituted by condition L63HG1_L, corresponding to the transmitter signal below trip level (K63HGT). Control oil excessively low pressure (critical) Excessively low pressure is detected: Transmitters: 2oo3 voting of (L63HGL1_W, l26hg2l, l26hg3l). If control oil pressure is detected excessively low, signal L63HGL is generated. Also, trip L63CO_TRP is generated after ignition phase during normal operation (L4=TRUE) and alarm L63HGL_ALM is generated starting at ignition (L2TVX). The transmitters 231-PIT-5121A1/A2/A3 (96HG-1A/B/C) are wired to MarkVIeS and when 2oo3 sensors detect a low-low condition, a trip condition is generated. Trip system healthy monitoring Fuel valves and variable geometries are driven to safe position by de-energizing 20HD-1 valve. This happens immediately when a trip is detected or at flameout in case of shutdown. The de-energizing of 20HD-1 must assure a rapid decrease of control oil pressure. If, elapsed one second from a trip, control oil pressure is not below trip level K63HGT, alarm L86HD_ALM is generated and the unit becomes not ready to start through L86HD latched signal resettable by master reset (L86MR1). The actuation of the 20HD-1 and 20HD-2 is done from MarkVIeS


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

41 of 94

4.6

HYDRAULIC OIL

4.6.1 DEVICE SUMMARY

DEVICE NAME PH-1 PH-2 88HQ FH1-1/2 96HQ-1 96HF-1 33HR-1 20CS-1

CUSTOMER TAG C-231-001A-P2 C-231-001A-P3 C-231-001A-P3-M C-231-001A-F8A/B 231-PIT-5114A 231-PDIT-5113A 231-ZSL-5119A 231-FV-5114A

DESCRIPTION HYDRAULIC OIL MAIN PUMP HYDRAULIC OIL AUXILIARY PUMP HYDRAULIC OIL AUXILIARY PUMP MOTOR HYDRAULIC OIL DUPLEX FILTERS HYDRAULIC OIL HEADER LOW PRESSURE HYDRAULIC OIL FILTERS HIGH DIFF. PRESS. HYD. RATCHET VALVE POSITION CLOSED HYD. RATCHET SELF-SEQUENCING VALVE

4.6.2 SOFTWARE DESCRIPTION Auxiliary pump logic Cutout condition If lube oil header pressure is not detected normal by 231-PIT-5133A1, 231-PIT-5133A2 and 231-PIT-5133A3, the hydraulic pump requests described below is cutout. When unit is stopped (L14HR), if the cutout condition is active for more than 10s from hydraulic pump start request, alarm is generated. When unit is running, if the cutout condition is active, alarm is generated. In case of lube oil pressure low voting trip by 231-PIT-5133A1, 231-PIT-5133A2 and 231-PIT-5133A3, cutout to MCC is generated. Request during unit startup If cutout condition is not active, during startup the auxiliary pump starts when the turbine start sequence is activated. It continues to operate until the HP shaft reaches minimum operating speed. From this point, the main mechanical hydraulic oil pump will provide the necessary oil pressure. Request during normal operation When HP shaft is above minimum operating speed, if cutout condition is not active, the auxiliary pump starts if Hydraulic oil pressure detected low by pressure transmitter 96HQ-1 (231-PIT-5114A). During normal operation when hydraulic pump start detected by 52HQ, alarm is generated. Stop during normal operation If during normal operation the pump gets started, detected by 52HQ, the pump remains running, also when the starting condition is reset. Operator from HMI or MCC can stop it manually. Request during shutdown If cutout condition is not active, when a normal shutdown occurs, the auxiliary pump is started when the HP shaft decreases below the minimum operating speed. The pump will keep running till the master relay (L4) is de-energized. If emergency shutdown (trip) is detected, L4 drop down and consequently the hydraulic pump is not started. Manual control If cutout condition is not active, auxiliary pump can be manually started. If manual operation is deselected, the pump return to automatic control and can be stopped as described above. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

42 of 94

Alarms logic If hydraulic oil pressure is detected low by 96HQ-1 (231-PIT-5114A), for more than 3s, alarm is generated. Alarm is generated if all the following conditions are verified: Above crank speed (L14HM) After start passed and before shutdown (L4) If hydraulic oil filter differential pressure is detected high by 96HF-1 (231-PDIT-5113A) for more than 1s, alarm is generated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

43 of 94

4.7

STARTING

4.7.1 DEVICE SUMMARY DEVICE NAME 33CS-1 20TU-1 88CR-1 PS-1

CUSTOMER TAG 231-ZSL-5181A 231-XX-5181A C-231-001A-P8-M C-231-001A-P8

DESCRIPTION STARTING CLUTCH POSITION – ENGAGED TORQUE CONVERTER OIL DRAIN STARTING MOTOR CHARGE PUMP FOR TORQUE CONVERTER

4.7.2 SOFTWARE DESCRIPTION Hydraulic ratchet interface logic When the unit is ready to crank, hydraulic ratchet system energizes the starting clutch solenoid 20CS-1 (231FV-5114A). If the starting clutch is not detected engaged within 10 seconds, alarm is generated. The turbine shaft breakaway is helped by hydraulic ratchet system that is stopped as soon as shaft moves. 88CR-1 command permissive Auxiliaries ready to crank Loss of feedback event (~l52cr) elapsed from more than 20s, detected by 52CR-1 (231-XS-515I) signal. 88CR-1 turn-on command logic When starting clutch is detected engaged by 33CS-1 (231-ZSL-5181A) , cranking motor 88CR-1 is started through 4CR_1A (231-XS-515R) signal. If motor feedback from MCC 52CR-1 (231-XS-515I) is not detected within 2 seconds, trip and alarm are generated (sequence aborted). If motor feedback is detected but HP shaft doesn't break away (L14HR) within 30 seconds, trip and alarm are generated (sequence aborted). Cranking speed logic After shaft break away, when the minimum cranking speed is achieved, the torque converter oil drain valve 20TU-1 (231-XX-5181A) is opened, in order to reduce the torque and to maintain the specified speed to accomplish purge, ignition and warm-up steps. Signal OPENING is enabled by L4 to avoid the opening of the valve during coast down. The valve will be closed again after warm-up step completes, in order to have the maximum torque for accelerating phase. If motor feedback 52CR-1 (231-XS-515I) or clutch engaged limit switch 33CS-1 (231-ZSL-5181A) signals are lost, trip and alarm are generated. Alarm and trip are enabled below accelerating speed and are disabled above the operative speed and in case of trip. 88CR-1 turn-off logic After warm-up sequence, unit accelerates to full speed. At approx. 50÷60% of rating speed, the inversion of the torque on starting clutch causes its mechanical disengagement (the turbine can sustain itself). This condition is detected by 33CS-1 (231-ZSL-5181A) limit switch signal and the cranking motor is turned off. The motor is anyway turned off if HP shaft speed is above self-sustaining speed (60%). and above operative speed. If starting clutch doesn't disengage when the HP shaft speed is above the minimum operating speed, trip and alarm are generated. Motor turn-off is also achieved if one of the following conditions is verified: system trip unit trip unit shutdown


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

44 of 94

4.8

HYDRAULIC RATCHETING

4.8.1 DEVICE SUMMARY DEVICE NAME PH-3 88HR FH-2 43HR

CUSTOMER TAG C-231-001A-P4 C-231-001A-P4-M C-231-001A-F9 231-HS-5109A

33HR-1

231-ZSL-5119A

20CS-1

231-FV-5114A

33CS-1

231-ZSL-5181A

DESCRIPTION RATCHET PUMP HYDRAULIC RATCHET MOTOR HYDRAULIC RATCHET OIL FILTER HYDRAULIC RATCHET PUMP MOTOR TEST HYDR. RATCHET VALVE POSITION – CLOSED HYDRAULIC RATCHET SELF SEQUENCING VALVES STARTING CLUTCH POSITION – ENGAGED

4.8.2 SOFTWARE DESCRIPTION The sequence described is used to describe ratchet pump motor (88HR) start command (4HR1) and starting clutch engaging command 20CS-1 (231-FV-5114A). The two ratcheting commands are generated at the same time by the same logic. The clutch engaged is detected by limit switch 33CS-1 (231-ZSL-5181A) signal that cause the cranking motor to start. Push button 43HR (231-HS-5109A) is installed to provide manual start of motor 88HR. Ratcheting commands cutout Lube oil pressure low voting trip logic HP shaft control speed signal loss HP shaft above crank speed Unit start-up ratcheting sequence During the unit starting sequence, if no cutout and all permissive conditions verified, the ratcheting begin as soon as the ready to crank is detected. It continues to operate until the HP shaft speed is detected. Ratcheting cycles during cooldown During a stop sequence, the ratchet pump is started 60 seconds after the HP shaft is detected at zero speed by L14HR; independently from the state of, the pump remains running and rotating the shaft until the 33HR-1 (231ZSL-5119A) limit switch drop down delayed of 2s is detected. At this point the pump is kept stopped for 180 s, and then the cycle is repeated. Cooldown ratcheting cycles are stopped when cooldown sequence is completed. Manual ratcheting (Jogging) When GT is stopped, a ratcheting cycle can be started manually (jogging) acting on the local push-button mounted on the ratchet pump skid 43HR (231-HS -5109A) or by HMI push button. Note that the local push button has to be closed for more than 2 s to activate the jogging command. Usually jogging is required after cooldown: as lube oil header pressure low cutout condition (L63QT) is detected, jogging command causes first the lube oil emergency pump starting, and then, when the cutout condition is reset, a jogging cycle. As for cooldown ratcheting, a jogging cycle stops 2s after the drop down of hydraulic ratchet limit switch (33HR-1 (231-ZSL-5119A) ) Alarms, trips and monitoring If, during cooldown ratcheting, limit switch (33HR-1 (231-ZSL-5119A) ) generated. The alarm is disabled at the end of cooldown. • If ratcheting cycle is longer than 30s, alarm is generated. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

is not detected for 6 minutes, alarm is

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

45 of 94

• •

If hydraulic ratchet motor overload is detected (49HR), alarm is generated. Hydraulic ratchet pump running is detected (72HR) for monitoring purposes.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

46 of 94

4.9

BEARING METAL TEMPERATURE

TURBINE BEARINGS

4.9.1 DEVICE SUMMARY DEVICE NAME BT-TA1-1A BT-TI1-1A BT-J1-1A BT-J1-2A BT-TA1-2A BT-TI1-2A BT-J2-1A BT-J2-2A BT-J3-1A BT-J3-2A BT-TA4-1A BT-TI4-1A BT-J4-1A BT-J4-2A BT-TA4-2A BT-TI4-2A

CUSTOMER TAG 231-TE-5061AA 231-TE-5062AA 231-TE-5063AA 231-TE-5064AA 231-TE-5066AA 231-TE-5065AA 231-TE-5067AA 231-TE-5068AA 231-TE-5069AA 231-TE-5070AA 231-TE-5073AA 231-TE-5072AA 231-TE-5071AA 231-TE-5083AA 231-TE-5074AA 231-TE-5075AA

DESCRIPTION CASE BEARING 1 TEMP (THRUST ACTIVE) CASE BEARING 1 TEMP (THRUST INACTIVE) CASE BEARING 1 TEMP (JOURNAL) CASE BEARING 1 TEMP (JOURNAL) CASE BEARING 1 TEMP (THRUST ACTIVE) CASE BEARING 1 TEMP (THRUST INACTIVE) CASE BEARING 2 TEMP (JOURNAL) CASE BEARING 2 TEMP (JOURNAL) CASE BEARING 3 TEMP (JOURNAL) CASE BEARING 3 TEMP (JOURNAL) CASE BEARING 4 TEMP (THRUST ACTIVE) CASE BEARING 4 TEMP (THRUST INACTIVE) CASE BEARING 4 TEMP (JOURNAL) CASE BEARING 4 TEMP (JOURNAL) CASE BEARING 4 TEMP (THRUST ACTIVE) CASE BEARING 4 TEMP (THRUST INACTIVE)

4.9.2 SOFTWARE DESCRIPTION One element of each bearing metal RTD is wired to the Bently Nevada Temperature Monitoring System and the temperature reading is compared to the alarm set-point. If measured temperature of individual elements exceeds its set-point, individual alarm is generated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

47 of 94

COMPRESSOR BEARINGS

4.9.3 DEVICE SUMMARY DEVICE NAME

CUSTOMER TAG

---

231-TE-5133AA

---

231-TE-5134AA

---

231-TE-5135AA

---

231-TE-5136AA

---

231-TE-5139A1A

---

231-TE-5139A2A

---

231-TE-5139A3A

---

231-TE-5140A1A

---

231-TE-5140A2A

---

231-TE-5140A3A

DESCRIPTION THERMOELEMENT ON COMPRESSOR JOURNAL BEARING THERMOELEMENT ON COMPRESSOR JOURNAL BEARING THERMOELEMENT ON COMPRESSOR JOURNAL BEARING THERMOELEMENT ON COMPRESSOR JOURNAL BEARING THERMOELEMENT ON COMPRESSOR THRUST BEARING (ACTIVE) THERMOELEMENT ON COMPRESSOR THRUST BEARING (ACTIVE) THERMOELEMENT ON COMPRESSOR THRUST BEARING (ACTIVE) THERMOELEMENT ON COMPRESSOR THRUST BEARING (INACTIVE) THERMOELEMENT ON COMPRESSOR THRUST BEARING (INACTIVE) THERMOELEMENT ON COMPRESSOR THRUST BEARING (INACTIVE)

4.9.4 SOFTWARE DESCRIPTION Alarm and Trip logic: One element of each bearing metal RTD on the Compressor Journal Bearing (231-TE-5133AA, 231TE-5134AA, 231-TE-5135AA and 231-TE-5136AA) is wired to the Bently Nevada Temperature Monitoring System and the temperature reading is compared to the alarm set-point. If measured temperature of individual elements exceeds its set-point, individual alarm is generated. For thermo elements on CC Thrust bearings Active side (231-TE-5139A1A, 231-TE-5139A2A and 231-TE-5139A3A) as well as for CC Thrust bearings Inactive side (231-TE-5140A1A, 231-TE5140A2A and 231-TE-5140A3A) for HH temperature, Trip condition is initiated. The trip notification is sent to MarkVIe for time stamping.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

48 of 94

4.10 WHEELSPACES 4.10.1 DEVICE SUMMARY DEVICE NAME TT-WS1FI-1 TT-WS1FI-2 TT-WS1AI-1 TT-WS1AI-2

CUSTOMER TAG 231-TE-5079A1 231-TE-5079A2 231-TE-5082A1 231-TE-5082A2

TT-WS2FI-1

231-TE-5080A1

TT-WS2FI-2

231-TE-5080A2

TT-WS2AI-1 TT-WS2AI-2

231-TE-5081A1 231-TE-5081A2

DESCRIPTION st WHEEL SPACE TEMP. 1 STAGE FWD INNER #1 st WHEEL SPACE TEMP. 1 STAGE FWD INNER #2 st WHEEL SPACE TEMP. 1 STAGE AFT INNER #1 st WHEEL SPACE TEMP. 1 STAGE AFT INNER #2 nd WHEEL SPACE TEMP. 2 STAGE FWD INNER #1 nd WHEEL SPACE TEMP. 2 STAGE FWD INNER #2 nd WHEEL SPACE TEMP. 2 STAGE AFT INNER #1 nd WHEEL SPACE TEMP. 2 STAGE AFT INNER #2

4.10.2 SOFTWARE DESCRIPTION Alarms and Shutdown logic There are single element thermocouples (TC) in each measurement location to monitor the wheel space temperature. For each measurement section, the average temperature is calculated by the two TC. If the average temperature exceeds the alarm level for more than 10s, a common alarm is generated. If alarm level is reached continuously for more than 24 hours, alarm signal is generated and shutdown sequence starts. If the average temperature exceeds the shutdown level for more than 10s, a common alarm is generated that cause shutdown sequence to start. Water Wash Permissive All of the average wheel space temperature values are compared against each other and the highest value is selected. This value is then compared to a started threshold, to provide water wash permissive signal.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

49 of 94

4.11 SEISMIC VIBRATION 4.11.1 DEVICE SUMMARY

DEVICE NAME

CUSTOMER TAG

DESCRIPTION

39V-1A 39V-1B 39V-2A 39V-2B

231-VE-5061A1 231-VE-5061A2 231-VE-5062A1 231-VE-5062A2

HP SHAFT VIBRATION HP SHAFT VIBRATION LP SHAFT VIBRATION LP SHAFT VIBRATION

4.11.2 SOFTWARE DESCRIPTION The Seismic Vibration signals are wired to the BN3500 vibration monitoring system. Alarm and trip logic If one of sensor (39V-1A (231-VE-5061A1) 39V-1B (231-VE-5061A2), 39V-2A (231-VE-5062A1), 39V-2B (231-VE-5062A2) ) reaches alarm level for more than 5s, alarm is generated. If a sensor reaches trip level for more than 0.5s while a second sensor value is above alarm level, trip and alarm are generated. Inside each pair of sensors 39V-1A (231-VE-5061A1) 39V-1B (231-VE-5061A2) and 39V-2A (231-VE5062A1), 39V-2B (231-VE-5062A2) ), vibration differential calculation is done. If the differential is higher than a threshold for more than 0.5s, alarm is generated. In case of unhealthy or disabled sensors, the relative signals are discarded and alarm/trip logic is modified as follows to maintain the reliability of operation (lowering availability): One sensor faulty or disabled: nothing changes except that only the enabled and healthy signals are taken into account. This is because of transmissibility of vibration between the two pairs: it assures that trip level on the first pair is sensed at least at alarm level on the second pair. Two sensors faulty or disabled: trip logic is based on only one sensor. If the two faulty or disabled sensors belong to the same pair, shutdown signal L39VD2 and L39VD2_ALM alarm are generated Trip notification is hardwired from BN to MarkVIeS.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

50 of 94

4.12 MAGNETIC SPEED PICK-UP 4.12.1 DEVICE SUMMARY

DEVICE NAME

DESCRIPTION

77NH-1

CUSTOMER TAG 231-SE-5061A1

77NH-2

231-SE-5061A2

HP SHAFT MAGNETIC SPEED PICKUP WIRED (TO MARKVIES)

77NH-3

231-SE-5061A3


77NL-1

231-SE-5063A1

LP SHAFT MAGNETIC SPEED PICKUP WIRED (TO MARKVIES)

77NL-2

231-SE-5063A2


77NL-3

231-SE-5063A3


77HT-1 77HT-2 77HT-3 77LT-1

231-SE-5062A1 231-SE-5062A2 231-SE-5062A3 231-SE-5064A1

HP SHAFT MAGNETIC SPEED PICKUP WIRED (TO MARKVIES) HP SHAFT MAGNETIC SPEED PICKUP WIRED (TO MARKVIES) HP SHAFT MAGNETIC SPEED PICKUP WIRED (TO MARKVIES) LP SHAFT MAGNETIC SPEED PICKUP WIRED (TO MARKVIES)

77LT-2

231-SE-5064A2


77LT-3

231-SE-5064A3



4.12.2 SOFTWARE DESCRIPTION The median value of the magnetic pick-up signals for HP shaft 77NH-1(231-SE-5061A1), 77NH-2(231-SE5061A2) and 77NH-3(231-SE-5061A3) as well as the median value of the magnetic pick-up signals for LP shaft 77NL-1(231-SE-5063A1), 77NL-2(231-SE-5063A2) and 77NL-3(231-SE-5063A3) are sent to Mark Vie for Turbine Control. The median value of the magnetic pick-up signals for HP shaft 77HT-1(231-SE-5062A1), 77HT-2(231-SE5062A2) and 77HT-3(231-SE-5062A3) as well as the median value of the magnetic pick-up signals for LP shaft 77LT-1(231-SE-5064A1), 77LT-2(231-SE-5064A2) and 77LT-3(231-SE-5064A3) are sent to MarkVIeS and upon detection of High-high condition the gas turbine is tripped.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

51 of 94

4.13 COMBUSTION CHAMBER FLAME DETECTOR

4.13.1 DEVICE SUMMARY

DEVICE NAME

DESCRIPTION

28FD-2

CUSTOMER TAG 231-BE-5061A1

28FD-3

231-BE-5061A2

COMBUSTION CHAMBER FLAME DETECTOR

28FD-10

231-BE-5061A3


28FD-11

231-BE-5061A4



4.13.2 SOFTWARE DESCRIPTION All 4 detectors 28FD-2 (231-BE-5061A1), 28FD-3 (231-BE-5061A2), 28FD-10 (231-BE-5061A3), 28FD-11 (231-BE-5061A4), are hardwired to MarkVIeS. If 3oo4 detectors do not detect flame inside the combustion chamber, the Gas Turbine is tripped.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

52 of 94

4.14 INTERFACES WITH BENTLY NEVADA VIBRATION MONITORING SYSTEM TURBINE BEARINGS

4.14.1 DEVICE SUMMARY DEVICE NAME XT-1X XT-1Y ZT-1 ZT-2 XPH XT-2X XT-2Y XT-3X XT-3Y XT-4X XT-4Y ZT-3 ZT-4 XPL

CUSTOMER TAG 231-XT-5063A1 231-XT-5063A2 231-ZT-5061A1 231-ZT-5061A2 231-KT-5061A 231-XT-5064A1 231-XT-5064A2 231-XT-5065A1 231-XT-5065A2 231-XT-5066A1 231-XT-5066A2 231-ZT-5062A1 231-ZT-5062A2 231-KT-5062A

DESCRIPTION NO CONTACT RADIAL VIBRATION (CASE BRG 1) NO CONTACT RADIAL VIBRATION (CASE BRG 1) NO CONTACT AXIAL DISPLACEMENT (CASE BRG 1) NO CONTACT AXIAL DISPLACEMENT (CASE BRG 1) KEY PHASOR (CASE BRG 1) NO CONTACT RADIAL VIBRATION (CASE BRG 2) NO CONTACT RADIAL VIBRATION (CASE BRG 2) NO CONTACT RADIAL VIBRATION (CASE BRG 3) NO CONTACT RADIAL VIBRATION (CASE BRG 3) NO CONTACT RADIAL VIBRATION (CASE BRG 4) NO CONTACT RADIAL VIBRATION (CASE BRG 4) NO CONTACT AXIAL DISPLACEMENT (CASE BRG 4) NO CONTACT AXIAL DISPLACEMENT (CASE BRG 4) KEY PHASOR (CASE BRG 4)

4.14.2 SOFTWARE DESCRIPTION The NO Contact Radial Vibration, NO Contact Axial Displacement and Key-phasor signals are all wired to BN3500 Vibration Monitoring System. Alarm Logic: For high value of “NO Contact Radial Vibration” signals detected by any one of the sensors, a High alarm is generated. For high value of “NO Contact Axial Displacement” signal detected by any one of the sensors, a High alarm is generated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

53 of 94

COMPRESSOR BEARINGS

4.14.3 DEVICE SUMMARY DEVICE NAME

CUSTOMER TAG

---

231-XT-5133A1

---

231-XT-5133A2

---

231-XT-5134A1

---

231-XT-5134A2

---

231-ZT-5133A1

---

231-ZT-5133A2

---

231-ZT-5133A3

DESCRIPTION RADIAL VIBRATION PROBE ON COMPRESSOR JOURNAL BEARING RADIAL VIBRATION PROBE ON COMPRESSOR JOURNAL BEARING RADIAL VIBRATION PROBE ON COMPRESSOR JOURNAL BEARING RADIAL VIBRATION PROBE ON COMPRESSOR JOURNAL BEARING AXIAL DISPLACEMENT PROBE ON COMPRESSOR THRUST BEARING AXIAL DISPLACEMENT PROBE ON COMPRESSOR THRUST BEARING AXIAL DISPLACEMENT PROBE ON COMPRESSOR THRUST BEARING

4.14.4 SOFTWARE DESCRIPTION The NO Contact Radial Vibration and NO Contact Axial Displacement signals are all wired to BN3500 Vibration Monitoring System. Alarm and Trip logic: Radial Vibration: If 1oo2 probes [231-XT-5133A1 and 231-XT-5133A2] or [231-XT-5134A1 and 231-XT-5134A2] detects vibration corresponding H set-point, an alarm is generated. If vibration is HH then a Trip is initiated and a notification is sent to Mark Vie for Time stamping. If 2oo3 probes [231-ZT-5133A1, 231-ZT-5133A2 and 231-ZT-5133A3] detect axial displacement corresponding HH set-point, then a Trip is initiated and a notification is sent to Mark Vie for Time stamping.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

54 of 94

4.15 EXHAUST TEMPERATURE 4.15.1 DEVICE SUMMARY

DEVICE NAME

CUSTOMER TAG

DESCRIPTION

TT-XD-1 TT-XD-2 TT-XD-3 TT-XD-4 TT-XD-5 TT-XD-6 TT-XD-7 TT-XD-8 TT-XD-9 TT-XD-10 TT-XD-11 TT-XD-12 TT-XD-13

231-TE-5176A1 231-TE-5176A2 231-TE-5176A3 231-TE-5176A4 231-TE-5176A5 231-TE-5176A6 231-TE-5176A7 231-TE-5176A8 231-TE-5176A9 231-TE-5176A10 231-TE-5176A11 231-TE-5176A12 231-TE-5176A13

EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE EXHAUST TEMPERATURE

4.15.2 SOFTWARE DESCRIPTION Alarm and trip logic When the mean value of the Exhaust Thermocouples is greater than or equal to High value, a cumulative alarm is generated. When the mean value of the Exhaust Thermocouples is greater than or equal to High High value, a Trip is initiated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

55 of 94

4.16 EXHAUST DUCT BACK PRESSURE 4.16.1 DEVICE SUMMARY

DEVICE NAME

CUSTOMER TAG

DESCRIPTION

96EA-1A 96EA-1B 96EA-1C

231-PDIT-5067A1 231-PDIT-5067A2 231-PDIT-5067A3

EXHAUST DUCT BACK PRESSURE EXHAUST DUCT BACK PRESSURE EXHAUST DUCT BACK PRESSURE

4.16.2 SOFTWARE DESCRIPTION Alarm and trip logic When the median value of the three transmitters 96EA-1A (231-PDIT-5067A), 96EA-1B (231-PDIT5067B) and 96EA-1C (231-PDIT-5067C) reaches High threshold value an alarm is generated. When the median value reaches High High threshold value a Trip of the GT is started. This logic is implemented in MarkVIeS


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

56 of 94

4.17 WATER WASH 4.17.1 DEVICE SUMMARY DEVICE NAME

CUSTOMER TAG

33ED-4

231-ZSL-5277A

20TW-1 20TW-2

231-XX-5278A 231-XX-5277A

DESCRIPTION EXHAUST PLENUM DRAIN VALVE VA17-6 CLOSED ON LINE WASHING WATER SUPPLY OFF LINE WASHING WATER SUPPLY

4.17.2 SOFTWARE DESCRIPTION On line water wash sequence Cutout conditions Turbine start sequence not ended Compressor inlet temperature lower than the threshold 50°F. Selection logic If all cut-out condition are not verified, on-line water wash is selected by HMI pushbutton. Then, 3 seconds after the selection, the solenoid valve 20TW-1 (231-XX-5278A) is energized. Water wash is de-activated (and solenoid valve 20TW-1 (231-XX-5278A) is de-energized) whenever on line water wash is de-selected by pushbutton or a cut-out condition is verified. Alarms When the turbine start sequence is ended (L3), if the on line water wash pushbutton is selected while temperature cut-out condition is verified, alarm is generated.

Off line water wash sequence Cut-out conditions Master selector not in CRANK mode Selection logic: If cut-out condition is not active, off-line water wash is selected by HMI pushbutton. If sequence is not already active, off-line water wash is de-selected by HMI pushbutton. Activation enabling conditions: Master selector in CRANK mode HP shaft zero speed detected Off line water wash selected Activation logic: If activation-enabling conditions are all verified, the water wash sequence is activated when the unit is started. Water wash cut-out: Wheel spaces temperature high; Master protective signal dropped down Flame detected HP shaft below crank speed. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

57 of 94

Water wash start: If all cutout conditions are not verified and water wash sequence is activated, IGV open command is generated and the cleaning solution intercept valve 20TW-2 (231-XX-5277A) is opened. Water wash stop: Once the water wash is started, it is stopped when the unit normal stop is detected. Alarms: When the water wash is selected, if wheel spaces temperature permissive is dropped down, alarm is generated. Start permissive condition: If limit switch 33ED-4 (231-ZSL-5277A) closed during starting sequence, alarm is generated and start permissive inhibited. This logic is implemented in MarkVIeS.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

58 of 94

4.18 VENTILATION 4.18.1 DEVICE SUMMARY DEVICE NAME FNVF1/2

CUSTOMER TAG C-231-001A-BL1A/B

88BA-1/2

C-231-001A-BL1A/B-M

33ID-1 33OD-1 33OD-2 33OD-3 TT-BA-2A TT-BA-2B TT-BA-2C

231-ZSH-5242A 231-ZSH-5243A 231-ZSH-5244A 231-ZSH-5245A 231-TE-5241A1 231-TE-5241A2 231-TE-5241A3

96SV-1A

231-PDIT-5241A1

96SV-1B

231-PDIT-5241A2

96SV-1C

231-PDIT-5241A3

TT-BA-3A/B/C

231-TE-5242A1/A2/A3

45HD-1A/B/C

231-AE-5241A1/2/3

45HD-2A/B/C

231-AE-5242A1/2/3

DESCRIPTION VENTILATION FANS MAIN & STAND-BY VENTILATION AIR FAN MOTOR VENTILATION INLET DAMPER OPEN ACCESS. COMP. VENTILATION OUTLET OPEN TURBINE COMP. VENTILATION OUTLET OPEN COUPL. COMP. VENTILATION OUTLET OPEN GT COMPART. INTERNAL TEMP GT COMPART. INTERNAL TEMP GT COMPART. INTERNAL TEMP ENCLOSURE PRESSURE WITH RESPECT TO ATMOSPHERIC PRESSURE ENCLOSURE PRESSURE WITH RESPECT TO ATMOSPHERIC PRESSURE ENCLOSURE PRESSURE WITH RESPECT TO ATMOSPHERIC PRESSURE COUPL. COMP. INTERNAL TEMP. CATALYTIC GAS DETECTORS AT VENTILATION OUTLET CATALYTIC GAS DETECTORS AT VENTILATION OUTLET

4.18.2 SOFTWARE DESCRIPTION The ventilation system has a dual fan configuration driven by motors 88BA-1÷2. Under normal condition, only one fan, chosen by the operator as main, is operating, while the other, the auxiliary, is off. Limit switches are provided to monitor the compartment’s access doors fully close condition and also to monitor the fire dampers fully open condition. Median value of 96SV-1A/B/C (231-PDIT-5241A1/2/3) detects low differential pressure between inside and outside of Accessory-Turbine enclosure. These transmitters send the signal to SIS. If low differential pressure is detected, ventilation fan switch-over takes place; if already switched, shutdown of the GT occurs. Temperature elements are utilized to control turbine compartment outlet temperature (TT-BA-2A (231-TE5241 A1) / TT-BA-2B (231-TE-5241 A2) / TT-BA-2C (231-TE-5241 A3)) and (TT-BA-3A (231-TE-5242 A1) / TT-BA-3B (231-TE-5242 A2) / TT-BA-3C (231-TE-5242 A3)) Ventilation Start permissive conditions: Fire dampers fully open. Ventilation cutout conditions: Turbine enclosure fire detected trip, detected by fire-fighting system interface signal 45FTT ; Turbine enclosure Inergen discharged trip, detected by fire-fighting system interface signal 63CPD (generated inside FF. In addition ventilation cut out signals are sent from SIS directly to MCC (4BA1_C, 4BA2_C). This redundancy ensures that the fans do not operate during fire or extinguishing action of Inergen. Main/Auxiliary selection and changeover Fan selection is done by HMI dedicated pushbuttons, normally when both fans are stopped. Selection can be TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

59 of 94

changed, also if main fan is running. At changeover, the new selected main fan starts immediately; the deselected fan continues to run for 10 seconds, then it is stopped. This changeover sequence doesn't activate auxiliary fan running alarm. If changeover is done when both fans are running or both are stopped, nothing changes except the selection. If turbine compartment pressure detected by (96SV-1A/B/C (231-PDIT-5241A1/A2/A3)) is lower than the alarm threshold, then alarm is generated and ventilation fan is switched over from one to another. If already switched then shutdown occurs. This loop is wired to the SIS which generates command for the changeover. Auxiliary fan start requests: Turbine enclosure temperature high alarm; Turbine enclosure gas detected alarm, detected by gas detection system interface signal 45HTA ; (Gas Detection loop is in SIS). Also, in operative condition, from L4 pick-up to two hours after flameout, the following start condition is active: Accessory-Turbine compartment differential pressure low alarm, detected by median value of (96SV1A/B/C (231-PDIT-5241A1/A2/A3)) Main fan command: Main fan starts as soon as turbine starting sequence is initiated if all conditions below are verified: all start permissive conditions are verified all cutoff conditions are not verified Offline water wash not selected Main fan stops if at least one of the following conditions is verified: After ventilation operative period (120 min) after flameout. After L4 drop down, can be manually stopped by HMI dedicated pushbutton. Auxiliary fan command Auxiliary fan starts if the conditions below are all verified: at least one of auxiliary fan start request is verified all cutoffs conditions are not verified If no auxiliary fan start request is active, it stops when one of the following conditions is verified: together with the main, after ventilation operative period manually by HMI pushbutton from MCC Manual fans command If all start permissive conditions are verified and all cutoffs conditions are not verified, each fan can be manually started and stopped. Alarms and trips logic If high temperature is detected by voting logic of sensors in turbine (TT-BA-2A (231-TE-5241 A1) / TT-BA-2B (231-TE-5241 A2) / TT-BA-2C (231-TE-5241 A3)) and coupling compartment (TT-BA-3A (231-TE-5242 A1) / TT-BA-3B (231-TE-5242 A2) / TT-BA-3C (231-TE-5242 A3)) alarm is generated. If high high temperature is detected by voting logic of sensors in turbine (TT-BA-2A (231-TE-5241 A1) / TT-BA-2B (231-TE-5241 A2) / TT-BA-2C (231-TE-5241 A3)) and coupling compartment (TTBA-3A (231-TE-5242 A1) / TT-BA-3B (231-TE-5242 A2) / TT-BA-3C (231-TE-5242 A3)) trip is generated. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

60 of 94

The gas detectors in the accessory and turbine compartment ventilation outlet are wired to MarkVIeS. If 1oo3 detectors detect an LEL level of 5% an alarm is generated. During start-up, this results in an ‘Inhibit to Start’ condition. If 2oo3 detectors detect an LEL level of 10% a trip of the GT is activated. There are 3 H2S detectors in the Accessory compartment that are hardwired to MarkVIeS. Upon detection of High value of H2S, an alarm is generated. If at least one enclosure door is not closed alarm is generated. This signal is hardwired to the MarkVIeS. If dampers are not fully open, detected by 33ID-1 (231-ZSH-5242A), 33OD-1 (231-ZSH-5243), 33OD-2 (231-ZSH-5244) and 33OD-3 (231ZSH-5245), alarms are generated. If both 88BA-1 and 88BA-2 feedback signals are off for more than 30 seconds, alarm and normal shutdown are generated Start permissive condition Ventilation inlet damper open. Turbine, coupling and accessory compartment ventilation outlet dampers are open. If high temperature is detected by voting logic of sensors in turbine and coupling compartment in turbine compartment inhibit to start condition is generated. If high level of gas is detected by voting logic of gas detectors in turbine and accessory compartment in turbine compartment inhibit to start condition is generated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

61 of 94

4.19 INLET AIR FILTRATION 4.19.1 DEVICE SUMMARY DEVICE NAME 88TA-1 88TA-2 88TA-3 TA-1 TA-2 TA-3 96TF-1A 96TF-1B 96TF-1C 33AF-1 45HF-1 45HF-2 45HF-3

CUSTOMER TAG C-231-001A-BL3A-M C-231-001A-BL3B-M C-231-001A-BL3C-M C-231-001A-BL3A C-231-001A-BL3B C-231-001A-BL3C 231-PDIT-5231A1 231-PDIT-5231A2 231-PDIT-5231A3 231-ZSL-5229A 231-AE-5229A1 231-AE-5229A2 231-AE-5229A3

DESCRIPTION DUST EXTRACTOR FAN MOTOR DUST EXTRACTOR FAN MOTOR DUST EXTRACTOR FAN MOTOR DUST EXTRACTOR FAN DUST EXTRACTOR FAN DUST EXTRACTOR FAN TURBINE AIR INLET FILTER PRESS. CTRL TURBINE AIR INLET FILTER PRESS. CTRL TURBINE AIR INLET FILTER PRESS. CTRL INLET FILTER INSPECTION DOOR CLOSED INFRA RED GAS DETECTORS INFRA RED GAS DETECTORS INFRA RED GAS DETECTORS

4.19.2 SOFTWARE DESCRIPTION Alarms and trips logic : If inlet air filter differential pressure is detected high by median value of 96TF-1A (231-PDIT-5231/A1) , 96TF1B (231-PDIT-5231/A2) and 96TF-1C (231-PDIT-5231/A3) for more than 2 s, alarm L63TF1_ALM is generated If inlet air filter differential pressure is detected high high by voting shutdown median value of 96TF-1A (231PDIT-5231/A1) , 96TF-1B (231-PDIT-5231/A2) and 96TF-1C (231-PDIT-5231/A3) , shutdown signal and alarm signals are generated. In case of filter house inspection door closed detected by 33AF-1A (231-ZSL-5229A) , alarm is generated and permissive to start is given. This logic is implemented by SIS. If only one of the shutdown transmitter 96TF-1A (231-PDIT-5231/A1) , 96TF-1B (231-PDIT-5231/A2) and 96TF-1C (231-PDIT-5231/A3) detect high pressure for more than 60 s but the other two transmitters do not detect trip condition, alarm is generated. In case of pulse jet local panel failure detected 86PJ, alarm is generated. There are 3 Infra-Red Gas Detectors at the Air Inlet. These detectors are wired to the MarkVIeS. If 1oo3 detectors detect an LEL level of 5% an alarm is generated. If 2oo3 detectors detect an LEL level of 10% a trip of the GT is activated along with cut-out of the ventilation fans.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

62 of 94

4.20 FUEL GAS 4.20.1 DEVICE SUMMARY DEVICE NAME 96FG-2A 96FG-2B 96FG-2C 90SR TG-FG-1 96FG-1 96SR-1 96SR-2 65GC 96GC-1 96GC-2 33VG-2 20VG-2 --96FG FG-1 --FG-2 --96FG-1A 96FG-1B 20PG-1 20PG-2 20PG-3 33PG-1 33PG-2 33PG-3 33PG-4 96PG-1

CUSTOMER TAG

DESCRIPTION

231-PT-5005A1 231-PT-5005A2 231-PT-5005A3 231-FCV-5003A2 231-TE-5006AA 231-PIT-5003A 231-ZT-5003A1 231-ZT-5003A2 231-FCV-5004A2 231-ZT-5004A1 231-ZT-5004A2 231-ZSL-5009A 231-XX-5009A 231-PDT-5006A 231-PT-5005A 231-TE-5005A1B 231-TE-5005A1A 231-TE-5005A2B 231-TE-5005A2A 231-FIT-5005A1 231-FIT-5005A2 23-XX-5006A 23-XX-5008A 23-XX-5007A 231-ZSH-5006A 231-ZSL-5006A 231-ZSH-5008A 231-ZSL-5008A 231-PIT-5007A

33PV-2

231-ZSH- 5007A

FTG-1A FTG-1B 96FTG 96FG-B

231-TIT-5039 231-TIT-5040 231-TIT-5041 231-PT-5002A

---

231-FT-5002A

20VG-1

231-XX-5010A

INTER-STAGE FUEL GAS PRESSURE INTER-STAGE FUEL GAS PRESSURE INTER-STAGE FUEL GAS PRESSURE FUEL GAS STOP/SPEED RATIO VALVE ACTUATION FUEL GAS SUPPLY TEMPERATURE FUEL GAS PRESSURE UPSTREAM VALVE FUEL GAS STOP/SPEED RATIO VALVE POSITION FUEL GAS STOP/SPEED RATIO VALVE POSITION FUEL GAS CONTROL VALVE ACTUATION FUEL GAS CONTROL VALVE POSITION FUEL GAS CONTROL VALVE POSITION WARM-UP LINE VENT VALVE STATUS (CLOSED) WARM-UP LINE VENT VALVE DIFFERENTIAL PRESSURE ACROSS FUEL GAS Y-STRAINER FUEL GAS PRESSURE FOR INLET FLOW CALCULATION FUEL GAS TEMPERATURE FOR INLET FLOW CALCULATION FUEL GAS TEMPERATURE FOR INLET FLOW CALCULATION FUEL GAS TEMPERATURE FOR INLET FLOW CALCULATION FUEL GAS TEMPERATURE FOR INLET FLOW CALCULATION FUEL GAS INLET FLOW TRANSMITTER FUEL GAS INLET FLOW TRANSMITTER PURGE VALVE 1 ACTUATION SOLENOID PURGE VALVE 2 ACTUATION SOLENOID PURGE LINE VENT ACTUATION SOLENOID PURGE VALVE 1 OPEN CONDITION PURGE VALVE 1 CLOSE CONDITION PURGE VALVE 2 OPEN CONDITION PURGE VALVE 2 CLOSE CONDITION FUEL GAS PURGE LINE PRESSURE TRANSMITTER LIMIT SWITCH TO INTER STAGE VENT VALVE OF FUEL GAS NOZZLE PURGE LINE FUEL GAS TEMPERATURE UPSTREAM OF HEATER FUEL GAS TEMPERATURE UPSTREAM OF HEATER FUEL GAS TEMPERATURE DOWNSTREAM OF HEATER FUEL GAS PRESSURE FOR FLOW CLACULATION FUEL GAS FLOW TRANSMITTER FOR EXCESSIVE FUEL AT START-UP FUEL GAS VENT SOLENOID VALVE


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

63 of 94

4.20.2 SOFTWARE DESCRIPTION Following description is aplicable if ‘Fuel-Gas’ mode is activated. Vent valve control sequence: Vent valve opening is enabled if the following conditions are all verified: Water wash off-line not active (~L83BW) Flame not detected (~L28FDX) Ignition command not detected (~L2TVX) After start passed (L4) Conditions above select an enabling window between start passed and igniting events (see figure 1). Also, venting is disabled in case of off -line water wash sequence. L4

L2TVX L28FDX

Opening enabling window

Alarm enabling

Figure 1 - Vent valve enabling If vent valve opening is enabled, open command (l20vg2) is generated if fuel gas temperature is less than K26FGL_VG2 (typically 4°F) above alarm threshold K2 6FGL. Then it closes again with a hysteresis of K26FGL_VG2_H (typically 8°F). After an opening command (l20vg2), if valve is not open, detected by ~l33vg2_c, within 3s, alarm L86VG2_ALM is generated. After a closing command (~l20vg2), if valve is not completely closed, detected by l33vg2_c, within K20VG2_C (typically 30s), alarm L86VG2_ALM is generated. If valve is not completely closed, detected by ~l33vg2_c, alarm L33VG2_ALM is generated if at least one of the following conditions is true: Water wash off-line active (L83BW) Ignition active (L2TVX) Before start passed and after K20VG2_C seconds from loss of L4. After flame detection and before 1.1 * K20VG2_C seconds after loss of flame (~L28FDX). Conditions above select the complementary to the enabling opening window (see figure 1). Note that in case of trip event before ignition, the alarm is also disabled during maximum closing time (K20VG2_C) to allow vent valve to close. Alarms logic If the fuel gas pressure is low, detected by l63fgl, during ignition L2TVX or with flame detected L28FDX, alarm L63FGL_ALM is generated. If the fuel gas temperature ftg2 is lower than K26FGL (typically 86°F) during ignition L2TVX or with flame detected L28FDX, then alarm L26FGL_ALM is generated. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

64 of 94

If the fuel gas temperature ftg2 is higher than K26FGH (typically 284°F), alarm L26FGH_ALM is generated. If Differential Pressure across Fuel Gas Y- Strainer is found high detected by 231-PDT-5306A, then a High alarm is generated. Fuel Gas Heater Control Logic: Fuel Gas heater control will not be performed by Thyristor panels. The logic that would be followed to perform the ON / OFF command for the heaters and the logic that must be considered during GT starting is: Logic to be managed by DCS and MCC: IF FE-5005A (unit 1) + FE-5005A (unit 2) > or = 3000 kg/h AND IF TIT5041 (96FTG) < + 4°C THEN: heater ON.

IF TIT- 5039 (FTG-1A) or TIT0340 (FTG-1B) > or = + 7°C OR IF TIT- 5041 (96FTG) > + 90°C THEN: heater OFF. Logic to be managed by MKVIe: The interlock to the opening of SRV/GCV during GT starting procedure: IF TIT5039 (FTG-1A) or TIT5040 (FTG-1B) > or = + 8°C AND TG-FG-1 (231-TE-5006AA) is not low


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

65 of 94

4.21 LIQUID FUEL 4.21.1 DEVICE SUMMARY DEVICE NAME F-001A/B F-002 F-003 PF-1 88PF-1 23FL PF-2 88PF-2 77FD-1 77FD-2 77FD-3 ------96HF-2 96FL-1

CUSTOMER TAG C-231-001A-F-10A/B C-231-001A-F-11 C-231-001A-F-12 C-231-001A-P1 C-231-001A-P1-M C-231-001A-H4 C-231-001A-P12 C-231-001A-P12-M 231-SE-5013A 231-SE-5014A 231-SE-5015A 231-TIT-5013A1 231-TIT-5013A2 231-TIT-5013A3 231-PDIT-5014A 231-PIT-5018A

65FP-1

231-FCV-5015A1

20LF-2

231-XX-5016A

---

231-LIT-5013A

---

231-TIT-5014A

20LF-1 33FL-1 33FL-2

231-XX-5014AA 231-ZSH-5014A 231-ZSL-5014B

DESCRIPTION LIQUID FUEL DUPLEX FILTER LIQUID FUEL FILTER DOWNSTREAM PUMP LIQUID FUEL HYD OIL FILTER LIQUID FUEL PUMP LIQUID FUEL PUMP MOTOR LIQUID FUEL HEATER LIQUID FUEL DRAIN PUMP LIQUID FUEL DRAIN PUMP MOTOR LIQUID FUEL FLOW DIVIDER SPEED PICK-UP LIQUID FUEL FLOW DIVIDER SPEED PICK-UP LIQUID FUEL FLOW DIVIDER SPEED PICK-UP LIQUID FUEL TEMP LIQUID FUEL TEMP LIQUID FUEL TEMP LIQUID FUEL FILTER DIFF. PRESSURE LIQUID FUEL PRESSURE LIQUID FUEL SYSTEM CONTROL VALVE REGULATING SERVO VALVE LIQUID FUEL BYPASS VALVE ACTUATING SOLENOID VALVE LIQUID FUEL TANK LEVEL LIQUID FUEL TEMPERATURE FEEDBACK TO THYRISTOR CONTROL PANEL LIQUID FUEL VALVE ACTUATING SOLENOID LIQUID FUEL VALVE OPEN LIMIT SWITCH LIQUID FUEL VALVE CLOSE LIMIT SWITCH

4.21.2 SOFTWARE DESCRIPTION In Liquid Fuel System the main pump PF-1 delivers the 100% liquid fuel to the skid. The fuel valve 231-XV-5316A has two operating positions: By pass position: It provides the liquid by-pass through the recycle piping. Liquid fuel temperature is monitored by RTDs and transmitted to MarkVIe v.i.a. Temperature transmitters’ 231-TIT-5013A1, 231-TIT-5013A2 and 231-TIT-5013A3. If liquid fuel temperature low condition is detected (231-TAL-5013) an alarm is generated and liquid fuel heater is turned on and the fuel valve is set in the by-pass position. An inhibit signal for liquid system starting and running is generated. For liquid fuel temperature low-low condition (231-TALL-5013), GT Normal Stop condition is activated. Fuel supply position: Liquid fuel temperature detected by 231-TIT-5014A is sent to MarkVIe, which generates a control signal and sends to the Thyristor control panel to switch on/off the heater based on the feedback. Upon attaining the correct temperature the fuel is allowed to flow to the combustor by actuation of the SOV 231-XX-5016A. If low pressure is detected by 231-PIT-5018A (96FL-1), an alarm is generated and “Inhibit Liquid TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

66 of 94

Fuel Starting and running” condition is generated. If differential pressure across Liquid Fuel Filters detected by 231-PDIT-5014A (96HF-2) is detected high, an alarm is generated. The Liquid Fuel Heater control is performed by “Thyristor Control Panel”. Following feedback signals are transmitted to MarkVIe from Thyristor Control Panel: Liquid Fuel Temperature Liquid Fuel Heater Cut-out status Liquid Fuel Heater working/ ok condition Fault Condition In case of Thyristor Control Panel failure, electric heater will remain turned on until its own cut-off. The liquid fuel flow is sensed by each individual speed sensors 77FD-1 (231-SE-5013A) , 77FD-2 (231-SE-5014A) and 77FD-3 (231-SE-5015A) and transmitted to MarkVIe which perform Liquid Fuel Bypass valve 65FP-1 (231-FCV-5015A1) control to recirculate the liquid fuel back to Liquid Fuel Tank (C-231-001A-TK1) If the liquid fuel tank (TK-1) level is detected high (231-LAH-5013A) by the level transmitter 231-LIT5013A then the pump PF-2 is started to pump the liquid fuel to liquid fuel storage tank. If the level transmitter senses the level to be low (231-LAL-5013A) the pump PF-2 is stopped.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

67 of 94

4.22 FUEL TRANSFER 4.22.1 Fuel Splitter In dual fuel Gas Turbine the FSR (Fuel Stroke Reference) is divided into two signals to provide dual fuel operation. The two signals are FSR1 and FSR2. Typically FSR1 is for liquid and FSR2 is for gas. Fuel transfer sequence can be activated only when the START-UP COMPLETE SEQUENCE flag is satisfied.

4.22.2 Fuel Transfer (Liquid to Gas) If the unit is running on liquid operator interface GAS target is selected, the following sequence of events will take place: 1. FSR1 will remain at initial value but FSR2 will step to a value slightly greater than zero. This will open the gas control valve slightly to bleed down the inter valve volume, P2. This is done in case a high pressure has been entrapped. The presence of a pressure higher than that required by the speed ratio controller would cause slow response in initiating gas flow. 2. After a time delay to bleed down P2 and fill the gas supply line, the software program ramp the fuel commands at a rate programmed to a complete transfer. 3. As transfer progress, FSR1 will be reduced and FSR2 will increase at the programmed ramp rate. When the transfer is complete, 231-XX-5016A solenoid valve switches 231-XV-5016A to recycle position.

4.22.3 Fuel transfer (Gas to Liquid) When transfer from gas to liquid is initiated, the liquid fuel pump clutch is engaged, energizing the liquid fuel trip valve opens the liquid fuel stop valve, and the liquid purge is shut off. Transfer from gas to liquid is essentially the same sequence as previously described except that gas and liquid fuel command voltages are interchanged. For instance, at the beginning of a transfer FSR2 remains at its initial value, but FSR1 steps to a value slightly greater than zero. This will command a small liquid fuel flow. If there has been any fuel leakage past the check valves, this will fill the liquid fuel piping and avoid any delay in delivery at the beginning of the FSR1 increase. When transfer to total liquid is completed, a logic signal will close the gas fuel stop valve by deenergizing the gas fuel trip valve 231-XX-2052 (20FB-1) and initiating the gas fuel purge sequence. During normal running condition, the automatic Fuel gas to liquid fuel transfer is activated by the Fuel gas low-pressure transmitter 96FG-1.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

68 of 94

4.23 FUEL GAS BLOCK / FUEL GAS VENT VALVES Fuel Block (20FB-1) valve logic During starting sequence, fuel block valve is opened when L4 is detected. The opening is disabled if off line water wash is selected. When a trip (pressurized or depressurized) is detected the valve is closed. Fuel Vent (20FV-1) valve logic During starting sequence, fuel vent valve is closed after fuel line purge sequence. When a trip (pressurized or depressurized) is detected the valve is opened. The opening is enabled when fuel block valve is completely closed.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

69 of 94

4.24 ATOMIZING AIR SYSTEM 4.24.1 DEVICE SUMMARY DEVICE NAME CA-1 CA-2 FA2-1 FA1-1 FA3-1 20PL-1 20AA-1 AAT-1A AAT-1B AAT-1C 20AB-1 33AA-1 33AA-2 96AA 96AA-2 33AC-1

CUSTOMER TAG C-231-001A-C1 C-231-001A-C2 C-231-001A-F6 C-231-001A-F5 C-231-001A-F7 231-XX-5076A 231-XX-5074A 231-TE-5158A1A 231-TE-5158A2A 231-TE-5158A3A 231-XX-5073A 231-ZSL-5073A 231-ZSH-5073A 231-PIT-5078A 231-PIT-5077A 231-ZSL-5157A

DESCRIPTION MAIN ATOMIZING AIR COMPRESSOR AUXILIARY ATOMIZING AIR COMPRESSOR STARTING COMPRESSOR AIR FILTER AIR FILTER AIR FILTER LIQUID FUEL SYSTEM PURGE SOLENOID VALVE VA18-1 CONTROL AIR ON/OFF VALVE ATOMIZING AIR COOLER DISCHARGE TEMPERATURE ATOMIZING AIR COOLER DISCHARGE TEMPERATURE ATOMIZING AIR COOLER DISCHARGE TEMPERATURE AUX. ATOMIZING AIR COMPRESSOR VALVE CONTROL AUX. ATOMIZING AIR COMPRESSOR VALVE POSITION AUX. ATOMIZING AIR COMPRESSOR VALVE POSITION ATOMIZING AIR MANIFOLD PRESSURE PURGE AIR MANIFOLD PRESSURE ATOMIZING AIR COOLER VALVE CLOSE LIMIT SWITCH

4.24.2 SOFTWARE DESCRIPTION

The purpose of atomizing air is, during liquid fuel operation, to break up the liquid fuel into a fine mist, so that the fuel can ignite, and burn completely. In order to reach this requirement, the nominal pressure ratio of atomizing air relative to combustion chamber (Pcc) air is 1.35. This pressure ratio is needed for proper atomization of the liquid fuel. Improper liquid fuel atomization may result in incomplete combustion, and/or carryover of liquid fuel droplets into the turbine. The main atomizing air compressor (CA-1) pressurizes compressor discharge (Pcd) air to meet this requirement. During a liquid fuel startup, the nominal pressure ratio of atomizing air relative to Pcd air is 1.5. This pressure ratio is needed to ignite the liquid fuel. In order to meet this requirement a booster compressor driven by starting motor (CA-2) is required, because the main atomizing air compressor is shaft driven, and does not develop enough pressure until the turbine reaches 90% speed. Atomizing air is required during gas fuel operation. During gas fuel operation, atomizing air purges the atomizing air circuits and the liquid fuel circuits. These circuits must be purged in order to cool the nozzle tips and prevent backflow of combustion gases. During gas fuel operation, the nominal pressure ratio of atomizing air relative to Pcc air is 1.05. The air flow is driven to Purge Air Manifold by the valve VA19-1, actuated by solenoid 231-FX-5076 (20PL-1). During a gas fuel startup, the atomizing air circuits do not require purge. Three thermocouples (231-TE-5158A1A (AAT-1A) , 231-TE-5158A2A (AAT-1B) , 231-TE-5158A3A (AAT1C) monitor the inlet temperature of the main atomizing air compressor in order to protect the compressor. Alarms are generated for high and low level. Shutdown is generated for HH level. Trip is generated for LL condition. The pressure in the manifold is monitored by 231-PIT-5078A (96AA) . Shutdown is generated if relative TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

70 of 94

pressure is below a threshold that is different for start-up, liquid fuel running, fuel gas running, shut-down. During start-up the valve VA18 -1, actuated by solenoid 231-FV-5074A (20AA-1) , is open. The valve VA221, actuated by solenoid 231-XX-5073A (20AB-1) is open to give air supply to booster compressor. At end of start sequence (L3) VA22-1 receives the close command and the atomizing air system is driven by atomizing air compressor. During fuel gas operation the nominal pressure ratio of atomizing air relative to Pcc (1.05) is guaranteed by atomizing air compressor with VA18-1 closed. The correct suction pressure is guaranteed through the bypass line orifice (231-FO-5075A).


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

71 of 94

4.25 SEAL GAS, SEAL GAS HEATER & SEAL GAS BOOSTER SYSTEM 4.25.1 DEVICE SUMMARY DEVICE NAME F-701/A/B -----------------------------------------------------------------

CUSTOMER TAG C-231-001A-F3A/B 231-FIT-5206A 231-FIT-5207A 231-PDIT-5193A 231-PDIT-5201A1 231-PIT-5204A1 231-PIT-5204A2 231-PIT-5204A3 231-PIT-5205A1 231-PIT-5205A2 231-PIT-5205A3 231-PIT-5195A1 231-PIT-5195A2 231-PIT-5195A3 231-PIT-5199A 231-PIT-5200A 231-PIT-5208A 231-XX-5210A 231-ZSH-5208A 231-ZSH-5210A 231-ZSL-5208A 231-ZSL-5210A 231-PDIT-5209A 231-PDY-5201A 231-ZSH-5211A 231-ZSL-5211A 231-XX-5211A 231-TE-5210A1A 231-TE-5210A2A 231-TE-5210A3A 231-XX-5209A 231-ZSL-5209A 231-XX-5212A

---

231-PDIT-5210A

-----

231-PIT-5197A1/A2/A3 231-PIT-5198A1/A2/A3

DESCRIPTION N2 FILTER COMPRESSOR DISCHARGE END PRIMARY VENT COMPRESSOR SUCTION END PRIMARY VENT NITROGEN FILTER PRESSURE BUFFER SEAL GAS INLET COMPRESSOR PRIMARY VENT PRESSURE COMPRESSOR PRIMARY VENT PRESSURE COMPRESSOR PRIMARY VENT PRESSURE COMPRESSOR PRIMARY VENT PRESSURE COMPRESSOR PRIMARY VENT PRESSURE COMPRESSOR PRIMARY VENT PRESSURE NITROGEN HEADER PRESSURE NITROGEN HEADER PRESSURE NITROGEN HEADER PRESSURE SEAL GAS OUTLET BALANCING LINE PRESSURE SEAL GAS INLET BALANCING LINE PRESSURE PRIMARY VENT CONTROL PRESSURE NITROGEN INTERMEDIATE INJECTION VALVE FLARE PRESSURE CONTROL VALVE POSITION NITROGEN INTERMEDIATE INJECTION VALVE FLARE PRESSURE CONTROL VALVE POSITION NITROGEN INTERMEDIATE INJECTION VALVE SEAL GAS FILTERS BUFFER GAS PRESSURE CONVERTER GAS AMPLIFIER INLET VALVE OPEN LIMIT SWITCH GAS AMPLIFIER INLET VALVE CLOSE LIMIT SWITCH GAS AMPLIFIER INLET VALVE ACTUATING SOV GAS AMPLIFIER- SEALS PROTECTION GAS AMPLIFIER- SEALS PROTECTION GAS AMPLIFIER- SEALS PROTECTION EXTERNAL SEAL GAS INLET SOLENOID VALVE EXTERNAL SEAL GAS INLET LIMIT SWITCH BOOSTER SKID BUFFER GAS INLET ACTUATING SOV DIFFERENTIAL PRESSURE ACROSS SEAL GAS BOOSTER CC SEALING CHAMBER VENT DISCHARGE SIDE CC SEALING CHAMBER VENT SUCTION SIDE

4.25.2 SOFTWARE DESCRIPTION The purpose of buffer gas is to maintain a constant volumetric flow of dry filtered gas between primary seal and internal labyrinth avoiding unfiltered gas to reach seals. This is achieved actuating valve (231-PDCV5201A) through signal 231-PDY-5201A to maintain differential pressures 231-PDIT-5201A1 to the set point value. A PI control is used. Buffer gas alarm and fault logic If the differential pressures 231-PDIT-5201A1 lowers below threshold value when starting sequence is ended TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

72 of 94

(L3), an alarm is generated. If differential pressure between buffer-gas filter (231-PDIT-5209A) is above threshold level an alarm is generated. Buffer gas manual operation Manual operation can be enabled by command L43SG_CMD. If enabled, 231-PDCV-5201A valve is managed by seven pushbuttons: L5SG_SR_CPB – Set-point raise step L5SG_SL_CPB – Set-point lower step L5SG_C_CPB - Valve close command (fine tuning) L5SG_O_CPB - Valve open command (fine tuning) L5SG_FC_CPB - Valve close command (latched till completely close or stop is detected) L5SG_FO_CPB - Valve open command (latched till completely open or stop is detected) L5SG_S_CPB - Stop Primary vent flow alarm logic Primary vent low flow alarms are enabled if pressurized state is detected (L4PV) and, during startup, after the shaft has moved (~L14LR). If enable condition is verified and if flow through primary vent line suction side, measured by 231-FIT5206A, 231-FIT-5207A, lowers below threshold an alarm is generated. If flow through primary vent line suction side, measured by 231-FIT-5206A, 231-FIT-5207A, rises above threshold an alarm is generated. Primary vent pressure alarm and fault logic If primary vent suction side pressure 231-PDIT-5504 A1 / 231-PDIT-5504 A2 / 231-PDIT-5504 A3 rises above the trip threshold value, an alarm and depressurized trip are generated. The same alarm and trip are generated in case of transmitter fault detected. If primary vent discharge side pressure 231-PIT-5205 A1 / 231-PIT-5205 A2 / 231-PIT-5205 A3 rises above the trip threshold value, an alarm and depressurized trip are generated. The same alarm and trip are generated in case of transmitter fault detected. Primary vent control pressure The primary vent line pressure is monitored by 231-PIT-5208A and transmitted to MarkVIe which in controls the opening and closing of the valve 231-XV-5208A by actuating the solenoid valve 231-XX-5208A. The open/close position of 231-XV-5208A is detected by 231-ZSH-5208A and 231-ZSL-5508A. Seal purge gas injection logic If seal purge gas pressure 231-PIT-5195 A1 / 231-PIT-5195 A2 / 231-PIT-5195 A3 lowers below low threshold an alarm is generated. If seal purge gas pressure 231-PIT-5195 A1 / 231-PIT-5195 A2 / 231-PIT-5195 A3 becomes higher than high threshold an alarm is generated. If seal purge gas pressure 231-PIT-5195 A1 / 231-PIT-5195 A2 / 231-PIT-5195 A3 lowers below low low threshold an alarm and pressurized trip is generated. If the differential pressure 231-PDIT-5193A across the separation gas (Nitrogen) inlet filter is greater than a threshold value an alarm is generated. Start-up sequence During the start-up sequence, if valve open condition is not detected, when L1X is active, the valve 231XV-5209 is opened through the command 231-XX–5209A. The valve is closed when LP shaft reaches 70% of full speed.

Stop sequence During the shutdown or pressurized trip sequence, if valve open condition is not detected, the valve 231XV-5209A is opened through the command 231-XX–5209A when low pressure shaft speed goes below TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

73 of 94

the value of 60% of full speed. Intermediate Buffer Gas isolation In order to prevent the risk of reverse pressurization of the primary seal, the buffer gas injection shall be isolated maintaining however the injection to barrier seals. A remote controlled isolation valve (solenoid type) on the buffer gas downstream filter line dedicated to intermediate injection shall be provided. The valve shall be closed by the control logic in the following cases: • •

LP and Double Control Sealing System The valve shall be closed when the differential pressure between seal gas and primary vent is below 0.3 bar. HP Sealing System The valve shall be closed when the suction pressure or balancing drum chamber pressure is below 3 barg.

Seal Gas Booster Logic At the compressor start-up sequence, the seal gas booster is started. In the first 1 minute the transmitter (231-PDIT-5210A) is bypassed since initially there is no differential pressure developed across the booster. After 1 minute of starting the booster, if the transmitter detects a Low condition (231-PDSL-5210A), an alarm is generated. For a LL condition, the Booster trips and compressor running sequence is aborted. The temperature at the seal gas booster outlet is measured by the RTDs 231-TE-5210A1A, 231-TE5210A2A and 231-TE-5210A3A. If 2oo3 RTDs sense: - Low temperature, an alarm is generated and heater-on signal is transmitted by the MarkVIe to the Thyristor Control Panel which turns on the heater. - Low Low temperature, a trip with vent is initiated. - High temperature, an alarm is generated and heater-off signal is transmitted by the MarkVIe to the Thyristor Control Panel which turns off the heater. - High High temperature, a heater cut-off signal is generated.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

74 of 94

4.26 STEAM INJECTION 4.26.1 DEVICE SUMMARY DEVICE NAME

CUSTOMER TAG

96PJ-1

231-PIT-5025A

ST-SJ-1/2/3

231-TE-5025A1A/A2A/A3A

20SJ-2 33SJ-1 33SJ-2 33CJ-1 20BS-1 33BS-1 20BS-2 33BS-2 20BS-3 33BS-3 20BS-4 33BS-4

231-XX-5029A 231-ZSH-5029A 231-ZSL-5029A 231-ZSL-5026A 231-XX-5030A 231-ZSL-5030A 231-XX-5031A 231-ZSL-5031A 231-XX-5032A 231-ZSL-5032A 231-XX-5027A 231-ZSL-5027A

---

231-PY-5025A

96SJ-1 96SJ-2 60WQL 60WQR

231-FIT-5025A1 231-FIT-5025A2 231-XS-561 <4> 231-XS-562 <4>

DESCRIPTION STEAM INLET FLOW CALCULATION PRESSURE TRANSMITTER STEAM INLET FLOW CALCULATION TEMPERATURE INPUTS (RTD) STEAM INJECTION STOP VALVE ACTUATION STEAM INJECTION STOP VALVE OPEN STEAM INJECTION STOP VALVE CLOSED STEAM INJECTION CONTROL VALVE CLOSED DRAIN VALVE NUMBER 1 ACTUATION STEAM INJECTION DRAIN VALVE N.1 CLOSED DRAIN VALVE NUMBER 2 ACTUATION STEAM INJECTION DRAIN VALVE N.2 CLOSED DRAIN VALVE NUMBER 3 ACTUATION STEAM INJECTION DRAIN VALVE N.3 CLOSED STEAM DISCHARGE (AFTER VA-4) STEAM INJECTION MANIFOLD DRAIN VDI-4 STEAM INLET PRESSURE REGULATING I TO P CONVERTOR STEAM FLOW STEAM FLOW STEAM VALVES COMMAND STEAM VALVES COMMAND

4.26.2 SOFTWARE DESCRIPTION Steam injection skid function is NOx reduction. The 96PJ-1 (231-PIT-5025A) transmitter and ST-SJ-1 (231-TE-5025A1A) / ST-SJ-2 (231-TE-5025A2A) / ST-SJ-3 (231-TE-5025A3A) RTDs purpose is to calculate the steam mass flow in order to grant the necessary steam/gas mass ratio inside combustion chambers. Steam injection reference function is: WQR2 = [WQKn_K * [(FQMT - WQKn_B)] + WQKn_N Note the equation is of the form Y= mX + B Y = WQR2

(function)

m = WQKn_K

(Diluent/Fuel slope)

x = (FQMT - WQKn_B) (variable) FQMT = Total Fuel Mass Flow Reference WQKn_B = Fuel Flow Offset b = WQKn_N

(offset) TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION

REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE REVISED WHERE SHOWN <4>

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

75 of 94

STEAM INJECTION FLOW VS. FUEL FLOW

MAX limit WQKn_M slope WQKn_K n=1

STEAM FLOW

slope WQKn_K n=0

WQKn_N

WQKn_B n=0 WQKn_E

WQKn_B n=1 LK83WKn n=1

FUEL FLOW

Note: The table is applicable for both fuel gas and liquid fuel with following parameters Fuel Gas: WQK0_N 0.00859739 Kg/sec WQK0_M 1.47681 Kg/sec Liquid Fuel: WQK2_N 0.705118 Kg/sec WQK2_M 2.19891 Kg/sec The WQKn_E is the minimum fuel flow set point to start steam injection. The WQKn_M is the steam injection maximum flow limit. The ramp consists of multiple steps; the logic is used to select the “n” constant set to change the curve with fuel flow. The steam injection skid in order to be operative during turbine running requires a purging line heating procedures in steps. With steam injection disabled the position of the valves is the following: VDI-1 closed, VS-3 closed, VDI-2 open, VA-4 closed, VDI-3 closed, and VDI-4 closed. The VDI-1, VDI-3, VDI-4 valves are opened by the 20BS-1 (231-XX-5030A) , 20BS-3 (231-XX-5032A) , 20BS-4 (231-XX-5027A) commands, the control system will monitor the limit switch 33BS-1 (231-ZSL5030A) ,33BS-3 (231-ZSL-5032A) , 33BS-4 (231-ZSL-5027A) in not closed position, if after 3 seconds from the drain valve opening command the limit switches are still in closed position an alarm will be generated. The first step permits to heat and drain from condensate vapor the stop valve and at the same time to heat. This step permits also to drain and heat (with Pcd air) the piping from control valve to manifold and the manifold itself. The opening command 20BS-1 (231-XX-5030A) will start a timer set at 120 seconds, when this timer is expired the second step starts with the 20SJ-2 (231-XX-5029A) command in order to open the VS-3 stop valve. The control system will monitor the limit switch 33SJ-1 (231-ZSH-5029A) in not closed position, if after 3 seconds from the drain valve opening command the limit switch is still in closed position an alarm will be generated. The 20BS-1 (231-XX-5030A) command is de-energized 1 second after the 33SJ-1 (231-ZSH-5029A) limit switch not in closed position and the 20SJ-2 (231-XX-5029A) command active. The opening command 20SJ-2 will start a timer set at 120 seconds, when this timer is expired the third step starts with the 20BS-3 (231-XX-5032A) , 20BS-4 (231-XX-5027A) commands in order to close the VDI-3, TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

76 of 94

VDI-4 drain valves. The control system will monitor the limit switch 33BS-3 (231-ZSL-5032A) , 33BS-4 (231-ZSL-5027A) in closed position, if after 3 seconds from the drain valve opening command, the limit switch is not in closed position an alarm will be generated. VA-4 valve can now be opened and regulated by 4CJ-RUN MOT. STEAM VALVE RUN 4CJ-DIR MOT. STEAM VALVE DIRECTION And the steam injection system can be operative. The control system will monitor the limit switch 33CJ-1 (231-ZSL-5026A) in not closed position, if after 3 seconds from the drain valve regulating command the limit switch is still in closed position an alarm will be generated. The missing opening command to VS-3, VDI-1, VDI-2, VDI-3, VDI-4, VA-4 and not closed position feedback from limit switch will also generate an alarm, delay time will be set on site. During skid operation: • • • • • • • •

If the ST-SJ-1 (231-TE-5025/A1A) / ST-SJ-2 (231-TE-5025/A2A) / ST-SJ-3 (231-TE-5025/A3A) RTD temperature is below a low low superheated steam threshold an alarm is generated. If the ST-SJ-1 (231-TE-5025/A1A) / ST-SJ-2 (231-TE-5025/A2A) / ST-SJ-3 (231-TE-5025/A3A) RTDs temperature is below a low superheated steam threshold an alarm is generated. If the ST-SJ-1 (231-TE-5025/A1A) / ST-SJ-2 (231-TE-5025/A2A) / ST-SJ-3 (231-TE-5025/A3A) RTDs temperature is over a high threshold an alarm is generated. If the ST-SJ-1 (231-TE-5025/A1A) / ST-SJ-2 (231-TE-5025/A2A) / ST-SJ-3 (231-TE-5025/A3A) RTDs temperature is over a high threshold an alarm is generated. If the 96PJ-1 (231-PIT-5025A) pressure is below a low low threshold an alarm is generated. If the 96PJ-1 (231-PIT-5025A) pressure is below a low threshold an alarm is generated. If the 96PJ-1 (231-PIT-5025A) pressures is over a high threshold an alarm is generated. If the96PJ-1 (231-PIT-5025A) pressure is over a high high threshold an alarm is generated.

To re-initialize steam injection after a system shutdown a MASTER reset is needed.

Press. L

Press. LL

Temp. H

Press. HH

Temp. HH Press. H

Steam temp.

WORKING AREA

Tem

p. L

p Tem

. LL

Steam saturation

Steam pressure

Pressure (Barg) Temperature (°C)

LL 16 260


L 18 280

H 23 390

HH 24 400

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

77 of 94

5 ANTISURGE AND LOAD SHARING The compressor surge control panel contains redundant “CCC series 5” surge controllers for each compressor stage. The output of the surge controllers operates Antisurge valves for each stage to prevent compressor surge. Antisurge supplier (C.C.C.) will show details on relevant Functional Description. The interface signals between MarkVIe and CCC Controller is listed down Unit Control System Hardwired IO List (SOM6628418). Each Antisurge valve is equipped with a solenoid which is activated when the trip sequence is requested. For further information see section 1.10 (Trip sequence).

Logic Description of Fast Opening Antisurge Valve: l20as=0 means Fast Open Antisurge SOV is commanded to open. This happens when the following condition occurs: Condition: 1. The Shutdown condition is active Or 2. Turbine is tripped and shaft is not stopped (Considering Water-wash is not selected). Reset Logic of the Fast opening SOV: The SOV open condition is reset: - The Fast Opening command is reset if LP shaft is stopped or Reset pulse is obtained (K4PULS_RES = 60secs), whichever is earlier.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

78 of 94

6 FIRE FIGHTING MONITORING 6.1

ENCLOSURE FIRE DETECTION / FIGHTING:

6.1.1 DEVICE SUMMARY DEVICE NAME CBVF-1/2 CBVF-3 to CBVF-10

CUSTOMER TAG C-231-001A-V4A/B

DESCRIPTION FIRE FIGHTING NITROGEN CYLINDER

C-231-001A-V5A to H

FIRE FIGHTING INERGEN CYLINDER

33CP-1A

231-ZSH-5265A

33CP-1D

231-ZSH-5266A

33CP-2A

231-ZSL-5265A

33CP-2D

231-ZSL-5266A

96CP-1A 96CP-1B 96CP-1C 45CR-1 45-CR-2 45FA-1 45FA-2 45FA-3 45FA-4 45FT-1 45FT-2 45FT-3 45FT-4 45FT-5 45FT-6 45UV/IR-1 45UV/IR-2 XL-3A XL-3B XL-3C ------XL-4A XL-4B XL-4C ------XL-2 XA-2 EDS-2 XL-1 XA-1

231-PT-5289A1 231-PT-52891B 231-PT-52891C 231-XX-5265A 231-FX-5266A 231-TSHH-5253A1 231-TSHH-5253A2 231-TSHH-5253A3 231-TSHH-5253A4 231-TSHH-5253A5 231-TSHH-5253A6 231-TSHH-5253A7 231-TSHH-5253A8 231-TSHH-5253A9 231-TSHH-5253A10 231-BE-5253A1 231-BE-5253A2 231-XL-5258A1 231-XL-5258A2 231-XL-5258A3 231-HS-5258A 231-HS-5258I 231-HS-5258M 231-XL-5255A1 231-XL-5255A2 231-XL-5255A3 231-HS-5255A 231-HS-5255I 231-HS-5255M 231-XL-5256A1 231-XA-5256A2 231-HS-5256A3 231-XL-5257A1 231-XA-5257A2 TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION


EXTINGUISHER HEADER ISOLATION VALVE OPEN FEEDBACK TO MARKVIE EXTINGUISHER HEADER ISOLATION VALVE OPEN FEEDBACK TO MARKVIE EXTINGUISHER HEADER ISOLATION VALVE CLOSE FEEDBACK TO FF SYSTEM EXTINGUISHER HEADER ISOLATION VALVE CLOSE FEEDBACK TO FF SYSTEM EXTINGUISHER DISCHARGE HEADER PRESSURE EXTINGUISHER DISCHARGE HEADER PRESSURE EXTINGUISHER DISCHARGE HEADER PRESSURE FIRE DISCHARGE SOLENOIDS FIRE DISCHARGE SOLENOIDS HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR HEAT RISE FIRE DETECTOR UV/IR FIRE DETECTOR UV/IR FIRE DETECTOR GREEN LAMP- AUTO FLASHING RED LAMP- DISCHARGED WHITE LAMP INHIBITED 3 POSITION SELECTOR- AUTO POSITION 3 POSITION SELECTOR- INHIBIT POSITION 3 POSITION SELECTOR- MANUAL POSITION GREEN LAMP- AUTO FLASHING RED LAMP- DISCHARGED WHITE LAMP INHIBITED 3 POSITION SELECTOR- AUTO POSITION 3 POSITION SELECTOR- INHIBIT POSITION 3 POSITION SELECTOR- MANUAL POSITION FIRE DISCHARGE LAMP FIRE DISCHARGE HORN DISCHARGE PUSH BUTTON FIRE DISCHARGE LAMP FIRE DISCHARGE HORN DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

79 of 94

DEVICE NAME EDS-1

CUSTOMER TAG 231-HS-5257A3

DESCRIPTION DISCHARGE PUSH BUTTON

6.1.2 SOFTWARE DESCRIPTION Inergen is discharged energizing two solenoid valves, 45CR-1 (231-XX-5265A) and 45CR-2 (231-XX5266A) .In normal conditions these valves are de-energized. Inergen header isolation valves closure is detected by two limit switches, 33CP-2A (231-ZSL-5265A) and 33CP-2B (231-ZSL-5266A) , cabled to FF panel. Inergen header pressure is detected by median value of three pressure transmitters: 96CP-1A/B/C. When the system is in Automatic Mode, extinguisher discharge procedure is activated in case of automatic fire trip detection or extinguisher discharge push-button action, that activate the 45CR-1 (231-XX-5265A) and 45CR-2 (231-XX-5266A) solenoid valves. These steps will be then executed: 1. UCS is notified through a contact, 45FTT open on trip. 2. Enclosure ventilation fans cut-out is available through 2 contacts, 4BA1_C1 ,4BA2_C, open on trip. 3. the following alarm means are activated: horns close to the enclosure red flashing lights by the turbine enclosure Red flashing light or led mounted in the front of the F&G system. 4. After a 30 seconds delay, the Inergen is released in the turbine enclosure. 5. The UCS is notified through a free of voltage contact 63CPD open when extinguisher is discharging. 6. Once discharge is complete, the UCS is notified through a free of voltage open contact 33CPX.

The extinguisher discharge header pressure is checked by pressure switches in case an high pressure is detected the following steps are executed: 1. the UCS is notified through a free of voltage contact, 63CPD ,open on high pressure 2. Enclosure ventilation fans cut-out is available through 2 contacts, 4BA_C1, 4BA_C2 that open on trip. 3. the following alarm means are activated: horns close to the enclosure red flashing lights by the turbine enclosure Red flashing light mounted in the front of the F&G system. The selector switches 231-HS5255A and 231-HS5258A have 3 positions and follow the logic below: - When ‘AUTO’ mode is selected, upon detection of Fire by any one of the Fire Detectors, the discharge procedure is activated. - When ‘INHIBIT/OFF’ mode is selected, even if there is Fire in the enclosure, the system does not send command to Inergen discharge solenoid valves, - When ‘MANUAL’ mode is selected at Field, the operator can press the 231-HS-5256X3 (EDS-2) or 231-HS-5257X3 (EDS-1) push buttons at field to enable discharging of extinguisher at field.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

80 of 94

6.2

FIRE FIGHTING DEDICATED PLC INTERFACE:

Following signals are elaborated from F&G dedicated PLC and affect turbine start/stop sequence: If enclosure fire is detected, unit trips signal is generated (45FTT) If Inergen is discharged, (33CPX (231- XS -144C) ESTINGUISHANT DISCHARGED and 63CPDX (231XS-656C) EXTINGUISHANT RELEASE IN PROGRESS) unit trip and alarm are generated. If fire-fighting discharge is inhibited alarm (43CP-IX ESTINGUISHANT NOT AVAILABLE / INHIBITED) is generated. If FF system fault is detected, alarm (86FG-1 FIRE/GAS SYSTEM FAULT) is generated. Field Interface: If fire-fighting Inergen discharge valves is detected closed by limit switch (33CP-1A, 33CP-1D), alarm is generated. If fire-fighting bottles are empty, alarm (by 33CR) is generated. For details refer to Fire Fighting Logic Diagram (SOM6628499).


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

81 of 94

7 MARKVIE INTERFACES WITH OTHER SYSTEMS Here is given a brief explanation of all signals that are interfaced between MarkVIe and other systems external to MarkVIe. Fire Fighting System vs. Unit Control System: 1. 231-XL 145 A (XL-A) (RED FRONT PANEL LAMP): It Is a Contact 24Vdc signal (lamp) in the UCS front panel that indicates ‘Fire’ condition. 2.

231-XL 145 B (XL-B) (GREEN FRONT PANEL LAMP): It Is a Contact 24Vdc signal (lamp) in the UCS front panel that indicates ‘Armed’ condition.

3.

231-XL 145 C (XL-C) (WHITE FRONT PANEL LAMP): It Is a Contact 24Vdc signal (lamp) in the UCS front panel that indicates ‘Inhibited’ condition.

4.

231-XS -146 (43AUTO) (3 POSITION AUTO/INHIBIT/MANUAL SELECTOR): It is 3 Position Auto / Inhibit Manual Mode Selector in the UCS Front Panel.

5.

231-XS-610 (86PS-3) (110VDC BUS FAILURE): It is a contact signal (Open=Failure) from Fire Fighting Panel to MarkVIe indicating failure condition of 110VDC Bus 3 located at Fire Fighting Panel.

Fire Fighting System vs. Customer Fire Fighting System: 1. 231-XS -144 C (33CPX) (EXTING. UNAVAILABLE/INHIBITED (VALVES CLOSED) (TO CUSTOMER FF): It is a contact signal (NO, Close= valves closed) that indicate the open/ close condition of the extinguisher discharge header valves to Customer FF System. 2.

231-XS -655 C (43CP_IX) (ELECTRICAL DISCHARGE DIASABLED ALM (TO CUSTOMER FF) It is a contact signal (NO, Close= electric discharge disabled) that indicate the electric discharge disabled condition to Customer FF System.

3.

231-XS -656 C (63CPDX) (EXTINGUISHANT DISCH. IN PROGRESS (TO CUSTOMER FF): It is a contact signal (NO, Close= discharge in progress) that indicate the extinguisher discharge in progress condition to Customer FF System.

4.

231-XS -657 TC (45FTX) (FIRE DETECTED TRIP (TO CUSTOMER FF): It is a contact signal (NC, Open= Trip) that indicate the fire detected Trip condition to Customer FF System.

MarkVIe vs. Fire Fighting System: 1.

231-XS-140 (43CP_ARST) (FF SYSTEM REMOTE RESET): It is a contact signal (NO, Close= reset) that provide remote reset from MarkVIe to FF detection system.

2.

231-xs-141 (43CP_ASIL) (FF SYSTEM REMOTE SILENCE): It is a contact signal (NO, Close= silence) that provide remote silence from MarkVIe to FF detection system.

3.

231-XS-144 (33CP-1) (EXTINGUISHER UNAVAILABLE/ INHIBITED (VALVES CLOSED)): It is a contact signal (NO, Close= valves closed) that indicate the open/ close condition of the extinguisher discharge header valves from FF detection system to MarkVIe.

4.

231-XS-652 IF (86FF_SD) (FF INPUT FAULT (NORMAL SHUTDOWN): It is a contact signal (NC, Open= Fault), transmitted from FF detection system to MarkVIe that indicate the fault condition of the FF detection inputs.

5.

231-XS-652 SF (86FF-1) (FF SYSTEM FAULT): It is a contact signal (NC, Open= Fault), transmitted from FF detection system to MarkVIe that indicate the fault condition of the FF PLC.

6.

231-XS-655 (43CP_I) (ELECTRICAL DISCHARGE DISABLED ALARM): It is a contact signal (NO, Close= electric discharge disabled) that indicate the electric discharge disabled condition from FF detection system to MarkVIe.

7.

231-XS-656 A (63CPD) (EXTINGUISHER DISCHARGE IN PROGRESS): It is a contact signal (NO, Close= discharge in progress) that indicate the extinguisher discharge in progress condition from FF detection system to MarkVIe.

8.

231-XS-657 T (45FTT) (FIRE DETECTED TRIP): It is a contact signal (NC, Open= Trip) that indicate the fire detected Trip condition from FF detection system to MarkVIe.

MarkVIe vs. HRSG Burner Management System: 1. 231-XS-960 (DUCT BURNER PURGE COMPLETED): It is a contact signal from BMS to MarkVIe that indicate that the Duct Burner Purge is completed. 2.

231-XS-961 (GT LOAD > 60%): It is a Contact signal (NO, Close = GT Load > 60%) from MarkVIe to the BMS indicating that GT Load is greater than 60%. TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

82 of 94

MarkVIe vs. CCC: 1. 231-XA-804 (TNL_O) (TURBINE SPEED TO LOAD SHARING CONTROL SYSTEM): It is a (4-20) mA signal transmitted from MarkVIe to CCC Load Sharing Controller indicating the Turbine Speed. 2.

231-XA-808A (TNR_EXT) (SPEED SET-POINT FROM COMPRESSOR LOAD SHARING SYSTEM): It is a (4-20) mA signal transmitted from CCC Load Sharing Controller to MarkVIe that gives speed set-point to MarkVIe.

3.

231-XS-800B (4SURGE-1) (ANTISURGE CONTROLLER SURGE DETECTED): It is a contact signal (NO, Close = Surge Detected) transmitted from CCC Anti-surge Controller to MarkVIe indicating detection of Surge.

4.

231-XS-800C (3AS_ENA-1) (ANTISURGE CONTROLLER ENABLE): It is a contact signal (NO, Close = Enable) transmitted from MarkVIe to CCC Anti-surge Controller indicating Turbine Start sequence has ended (L3=1) and CCC Anti-surge Controller is enabled to perform Anti-surge Control.

5.

231-XS-800D (4TXT_O-1) (TURBINE TRIP STATUS REPETITION): It is a contact signal (NC, Open= Trip) transmitted from MarkVIe to CCC Controllers indicating Unit Summary Trip (L4=0).

6.

231-XS-800F (EXCESSIVE SURGE SHUTDOWN): It is a Contact Signal (Close= Shutdown) transmitted from CCC Antisurge Controller to MarkVIe initiating Shutdown due to excessive surge.

7.

231-XS-800L (LOAD SHARING RUN / STOP): It is a Contact Signal (NO, Close= Load Sharing Enabled) transmitted from MarkVIe to CCC Load Sharing Controller indicating that Turbine Start sequence has ended (L3=1) and CCC Load Sharing Controller is enabled to perform Load Sharing Control.

8.

231-XS-806 (4TRACK) (TRACKING REQUEST TO LOAD SHARING SYSTEM): It is a Contact Signal (NO, Close = Tracking Request enabled) transmitted from MarkVIe to CCC Controller to indicate CCC controller to remain in Tracking Mode.

9.

231-XS-807A (86AS) (ANTI-SURGE CONTROLLER FAULT): It is a contact signal (NC, Open=Fault) transmitted from CCC Anti-surge / Load Sharing Controller to MarkVIe indicating Fault condition of CCC Anti-surge controller.

10. 231-XS-808B (86LS) (MASTER CONTROLLER FAULT): It is a contact signal (NC, Open=Fault) transmitted from CCC Master Controller to MarkVIe indicating Fault condition of CCC Master Controller. MarkVIe vs. DCP: 1. 231-XS-200 I (42HR-1) (HYDRAULIC RATCHET MOTOR RUNNING): It is a contact signal (Close= Running) transmitted from DCP to MarkVIe indicating the running status of Hydraulic Ratchet pump motor. 2.

231-XS-200 O (49HR-1) (HYDRAULIC RATCHET PUMP MOTOR OVERVOLTAGE): It is a contact signal (Open=Alarm) transmitted from DCP to MarkVIe indicating the overvoltage status of Hydraulic Ratchet pump motor.

3.

231-XS-200 R (4HR-1) (HYDRAULIC RATCHET RUN/STOP COMMAND): It is a contact signal (NO, Close = Running) transmitted from MarkVIe to DCP commanding Hydraulic Ratchet pump motor to Start. The inverted condition of the signal commands Stop condition of the motor.

4.

231-XS-200 U (27HR-1) (HYDRAULIC RATCHET PUMP MOTOR UNDERVOLTAGE): It is a contact signal (Open=Alarm) transmitted from DCP to MarkVIe indicating the under-voltage status of Hydraulic Ratchet pump motor.

5.

231-XS-206 A (DCP-30RA) (DCP- RECTIFIER “A” COMMON ALARM): It is a contact signal (Open=Alarm) transmitted from DCP to MarkVIe indicating the common alarm condition of the DCP Rectifier A.

6.

231-XS-207 (DCP-80X) (DCP BATTERY MINIMUM VOLTAGE): It is a contact signal (Open=Alarm) transmitted from DCP to MarkVIe indicating the minimum voltage condition of the DCP Battery.

7.

231-XS-208 (DCP-BD) (DCP BATTERY DISCHARGING): It is a contact signal (Open=Alarm) transmitted from DCP to MarkVIe indicating that the DCP Battery is discharging.

8.

231-XS-851-A (52QE-1) (MINERAL LUBE OIL EMERGENCY DC PUMP RUNNING): It is a contact signal (Close= Running) transmitted from DCP to MarkVIe indicating the running status of Mineral Lube Oil Emergency DC Pump.

9.

231-XS-851-B (49QE) (MINERAL LUBE OIL EMERGENCY DC PUMP FAULT): It is a contact signal (Open= Fault) transmitted from DCP to MarkVIe indicating the fault status of Mineral Lube Oil Emergency DC Pump. <4>

10. 231-XS-852 (14HLR) (TURBINE SHAFT ZERO SPEED): It is a wet contact (110Vdc, Closed= Zero speed) signal transmitted from MarkVIe to DCP indicating the Turbine Shaft Zero Speed Condition. 11. 231-XS-853 (28FD) (TURBINE FLAME NOT DETECTED): It is a wet contact (110Vdc, Closed = Flame not detected) signal transmitted from MarkVIe to DCP indicating the turbine flame not detected condition. 12. 231-XS-854 (4E) (UCP SYSTEM FULLY OPERATIVE): It is a wet contact (110Vdc, Closed = Fully Operative) signal TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

83 of 94

transmitted from MarkVIe to DCP indicating the UCP System Fully Operative condition. 13. 231-XS-855 (4-TEST) (PUMP TEST): It is a wet contact (110Vdc, Closed = Test) signal transmitted from MarkVIe to DCP commanding the Emergency Lube Oil Pump test. 14. 231-XS-857 (63QL) (LUBE OIL PRESSURE NOT LOW): It is a wet contact (110Vdc, Closed = Pressure not low) signal transmitted from MarkVIe to DCP indicating the Lube Oil header pressure not low condition. 15. 231-XS-858 (63QN) (LUBE OIL PRESSURE NORMAL): It is a wet contact (110Vdc, Closed = Pressure normal) signal transmitted from MarkVIe to DCP indicating the Lube Oil header pressure normal condition. 16. 231-XS-859 (62CD) (COOLDOWN SEQUENCE ENDED): It is a contact signal (Close= sequence ended) transmitted from DCP to MarkVIe indicating the end of Cooldown sequence and expiration of Cooldown Timer. <4> MarkVIe vs. MCC: 1. 231-XS-100 I (52QA-1) (LUBE OIL AUXILIARY PUMP FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Lube Oil Auxiliary Pump Motor). 2.

231-XS-100-R (4QA-1A) (LUBE OIL AUXILIARY PUMP START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Lube Oil Auxiliary Pump Motor).

3.

231-XS-100-S (4QA-1B) (LUBE OIL AUXILIARY PUMP STOP COMMAND) It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Lube Oil Auxiliary Pump Motor).

4.

231-XS-102 I (52QV-1) (LUBE OIL VAPOUR EXTRACTOR 1 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Lube Oil Vapor Extractor Motor 1).

5.

231-XS-102-R (4QV-1A) (LUBE OIL VAPOUR EXTRACTOR 1 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Lube Oil Vapor Extractor 1 Motor).

6.

231-XS-102-S (4QV-1B) (LUBE VAPOUR EXTRACTOR 1 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Lube Oil Vapor Extractor 1 Motor).

7.

231-XS-103 I (52QV-2) (LUBE OIL VAPOUR EXTRACTOR 2 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Lube Oil Vapor Extractor Motor 2).

8.

231-XS-115-R (4QV-2A) (LUBE OIL VAPOUR EXTRACTOR 2 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Lube Oil Vapor Extractor 2 Motor).

9.

231-XS-115-S (4QV-2B) (LUBE VAPOUR EXTRACTOR 2 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Lube Oil Vapor Extractor 2 Motor).

10. 231-XS-104I (52HQ) (AUX HYDRAULIC OIL PUMP FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Auxiliary Hydraulic Oil Pump Motor). 11. 231-XS-104-R (4HQ-1A) (AUX HYDRAULIC OIL PUMP START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Auxiliary Hydraulic Oil Pump Motor). 12. 231-XS-104-S (4HQ-1B) (AUX HYDRAULIC OIL PUMP STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Auxiliary Hydraulic Oil Pump Motor). 13. 231-XS-108I (52BA-1) (VENTILATION FAN #1 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Ventilation Fan 1 Motor). 14. 231-XS-113-R (4BA-1A) (VENTILATION FAN #1 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Lube Oil Ventilation Fan 1 Motor). 15. 231-XS-113-S (4BA-1B) (VENTILATION FAN #1 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Lube Oil Ventilation Fan 1 Motor). 16. 231-XS-109I (52BA-2) (VENTILATION FAN #2 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Ventilation Fan 2 Motor). 17. 231-XS-114-R (4BA-2A) (VENTILATION FAN #2 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Ventilation Fan 2 Pump Motor). 18. 231-XS-114-S (4BA-2B) (VENTILATION FAN #2 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Ventilation Fan 2 Pump Motor). TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

84 of 94

19. 231-XS-121I (52PF-1) (LIQUID FUEL FORWARDING MOTOR 1 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Liquid Fuel Forwarding Pump Motor 1). 20. 231-XS-129-R (4PF-1A) (LIQUID FUEL FORWARDING MOTOR 1 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Liquid Fuel Forwarding Pump 1 Motor). 21. 231-XS-129-S (4PF-1B) (LIQUID FUEL FORWARDING MOTOR 1 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Liquid Fuel Forwarding Pump 1 Motor). 22. 231-XS-711 (4PF1_C) (LIQUID FUEL FORWARDING MOTOR 1 CUT OUT): It is a contact Signal (Open= Cut-Out) from MarkVIe to MCC indicating cut-out condition of Liquid Fuel forwarding pump Motor 1). 23. 231-XS-122I (52PF-2) (LIQUID FUEL FORWARDING MOTOR 2 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Liquid Fuel Forwarding Pump Motor 2). 24. 231-XS-120-R (4PF-2A) (LIQUID FUEL FORWARDING MOTOR 2 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Liquid Fuel forwarding Pump 2 Motor). 25. 231-XS-120-S (4PF-2B) (LIQUID FUEL FORWARDING MOTOR 2 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Liquid Fuel forwarding Pump 2 Motor). 26. 231-XS-714 (4PF2_C) (LIQUID FUEL FORWARDING MOTOR 2 CUT OUT): It is a contact Signal (Open= Cut-Out) from MarkVIe to MCC indicating cut-out condition of Liquid Fuel forwarding pump Motor 2). 27. 231-XS-126 I (52QT-1) (LUBE OIL HEATER #1 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Lube Oil Heater 1). 28. 231-XS-126-R (4QT1_1A) (LUBE HEATER#1 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Lube Oil Heater 1). 29. 231-XS-126-S (4QT1_1B) (LUBE HEATER#1 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Lube Oil Heater 1). 30. 231-XS-720 (4QT1_C) (LUBE OIL HEATER 1 CUT OUT): It is a contact Signal (Open= Cut-Out) from MarkVIe to MCC indicating cut-out condition of Lube Oil Heater 1). 31. 231-XS-127 I (52QT-2) (LUBE OIL HEATER #2 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Lube Oil Heater 2). 32. 231-XS-127-R (4QT2_1A) (LUBE HEATER#2 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Lube Oil Heater 2). 33. 231-XS-127-S (4QT2_1B) (LUBE HEATER#2 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Lube Oil Heater 2). 34. 231-XS-722 (4QT2_C) (LUBE OIL HEATER 2 CUT OUT): It is a contact Signal (Open= Cut-Out) from MarkVIe to MCC indicating cut-out condition of Lube Oil Heater 2). 35. 231-XS-128 I (52QT-3) (LUBE OIL HEATER #3 FEEDBACK): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Lube Heater 3). 36. 231-XS-128-R (4QT3_1A) (LUBE HEATER#3 START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Lube Oil Heater 3). 37. 231-XS-128-S (4QT3_1B) (LUBE HEATER#3 STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Lube Oil Heater 3). 38. 231-XS-723 (4QT3_C) (LUBE OIL HEATER 3 CUT OUT): It is a contact Signal (Open= Cut-Out) from MarkVIe to MCC indicating cut-out condition of Lube Oil Heater 3). 39. 231-XS-134 (27MC) (UNDERVOLTAGE FROM MCC): It is a Contact Signal (Open = Under-voltage) from MCC to MarkVIe indicating under-voltage condition from MCC). 40. 231-XS-135 (49X) (COMMON OVERLOAD FROM MCC): It is a Contact Signal (Open = Overload) from MCC to MarkVIe indicating Overload condition from MCC). 41. 231-XS-136 (74X-MCC) (DRAWERS COMMON ALARM): It is a Contact Signal (Open = Alarm) from MCC to MarkVIe indicating Common alarm from MCC drawers). TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

85 of 94

42. 231-XS-139 (2TVX) (IGNITION COMMAND TO MCC): It is a Contact Signal (Close = Ignite) from MarkVIe to MCC commanding the igniter to ignite). 43. 231-XS-515 I (52CR-1) (GT CRANKING MOTOR STATUS): It is a Contact Signal (NO, Close= Running) from MCC to MarkVIe indicating running feedback of Cranking Motor). 44. 231-XS-515 L (86CR) (GT CRANKING MOTOR LOCKOUT): It is a Contact Signal (NO, Close= Lockout) from MCC to MarkVIe indicating lockout condition of Cranking Motor). 45. 231-XS-515-R (4CR-1A) (GT CRANKING MOTOR START COMMAND): It is a Pulse Signal (Pulse= Start) from MarkVIe to MCC indicating Start command to Cranking Motor). 46. 231-XS-515-S (4CR-1B) (GT CRANKING MOTOR STOP COMMAND): It is a Pulse Signal (Pulse= Stop) from MarkVIe to MCC indicating Stop command to Cranking Motor). 47. 231-XS-558 (52TG) (FEED BACK TURNING GEAR): It is a Contact Signal (Cls=Running) from MCC to MarkVIe indicating running feedback of turning gear. <4> 48. 231-XS-559 (4TG1_R) (TURNING GEAR COMMAND-RESET): It is a Contact Signal (Cls=Reset) from MarkVIe to MCC commanding the reset of turning gear. <4> 49. 231-XS-560 (4TG1_S) (TURNING GEAR COMMAND-SET): It is a Contact Signal (Cls=Set) from MarkVIe to MCC commanding the set of turning gear. <4> MarkVIe vs. DCS: 1. 231-XS-0250 RS (3CRS) (CUSTOMER READY TO START): It is a Contact Signal (NO, Close= Ready to Start) transmitted from DCS to MarkVIe as a permissive to start the Gas Turbine. <4> 2.

231-XS-0253 C (14HMX) (GT CRANKING STATUS): It is a Contact Signal (NO, Close= Cranking status) transmitted from MarkVIe to DCS indicating the GT cranking status. <4>

3.

231-XS-0253 R (3X) (GT RUNNING STATUS): It is a Contact Signal (NO, Close= Running status) transmitted from MarkVIe to DCS indicating the GT running status (L3=1). <4>

4.

231-XS-0253 RS (3RS) (GT READY TO START STATUS): It is a Contact Signal (NO, Close= Ready to Start) transmitted from MarkVIe to DCS indicating the GT Ready to Start status. <4>

5.

231-XS-0253 S (GT STARTING STATUS): It is a Contact Signal (NO, Close= Starting) transmitted from MarkVIe to DCS indicating the GT start sequence initiated and the internal command Start Auxiliaries is true (L1X=1). <4>

6.

231-XS-0253SD (94X_C) (GT NORMAL STOP STATUS): It is a Contact Signal (NO, Close= Stop) transmitted from MarkVIe to DCS indicating the GT Normal stop status and that the Shutdown is in progress (L94X=1). <4>

7.

231-XS-0253 TD (4T_C2) (GT TRIP STATUS – DEPRESSURIZED): It is a Contact Signal (NC, Open= Trip) transmitted from MarkVIe to DCS indicating the GT Depressurized Trip status. <4>

8.

231-XS-0253 TP (4T_C1) (GT TRIP STATUS – PRESSURIZED): It is a Contact Signal (NC, Open= Trip) transmitted from MarkVIe to DCS indicating the GT Pressurized Trip status. <4>

9.

231-XS-0254 (30ALM) (CUMULATIVE ALARM REPETITION): It is a Contact Signal (NC, Open= Trip) transmitted from MarkVIe to DCS indicating the Cumulative alarm condition. <4>

10. 231-XS-0255 (43R_C) (GT IN REMOTE CONTROL MODE): It is a Contact Signal (NO, Close= Remote Control Mode) transmitted from MarkVIe to DCS indicating that Remote Control Mode is selected and the DCS can control the sequence. <4> 11. 231-XS-0256 (4VALV) (PROCESS VALVE POSITIONING): It is a Contact Signal (NO, Close= Process valve positioning signal) transmitted from MarkVIe to DCS indicating that Auxiliaries are started and Master Protective signal is enabled (L4=1). Now the DCS must start the Purging sequence of the Process valves. <4> 12. 231-XS-0257 R (1START) (PROCESS REMOTE START): It is a Contact Signal (NO, Close= Remote Start) transmitted from DCS to MarkVIe commanding the GT to start after L3RS=1 is reached and from Master Selector in HMI ‘Remote’ mode is selected. <4> 13. 231-XS-0257 S (1STOP) (PROCESS REMOTE STOP): It is a Contact Signal (NO, Close= Remote Stop) transmitted from DCS to MarkVIe commanding the GT to stop and if in HMI ‘Remote’ mode is selected. <4> 14. 231-XS-0257 T (4CT) (PROCESS REMOTE TRIP): It is a Contact Signal (NC, Open= Remote Trip) transmitted from DCS to MarkVIe commanding the GT to Trip. <4> TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION INTRODUCED IN THIS PAGE REVISED WHERE SHOWN <4>

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

86 of 94

15. 231-XS-0258 RS (3CRC) (CUSTOMER READY TO CRANK): It is a Contact Signal (NO, Close= Ready to Crank) transmitted from DCS to MarkVIe giving the permissive to MarkVIe to Crank. It indicates that the Process valve purging sequence is completed by the DCS and the valve position is ok for a pressurized or a depressurized start and that the cranking can be started. <4> 16. 231-XS-0260 (FUEL GAS SCRUBBER SYSTEM TRIP): It is a Contact Signal (NC, Open= Trip) transmitted from DCS to MarkVIe indicating the Trip condition from Fuel Gas Scrubber system (in customer’s scope). <4> 17. 231-XS-0261 (TNR) (SPEED SETPOINT FEEDBACK): It is a (4-20) mA signal transmitted from MarkVIe to DCS indicating the speed set-point feedback. <4> 18. 231-XS-0261 AL (60LC) (LOAD SETPOINT): It is a (4-20) mA signal transmitted from DCS to MarkVIe indicating the load setpoint from DCS. It is when the LP Shaft speed is controlled by Raise / Lower command from DCS. <4> 19. 231-XS-0954 (DUCT BURNER PURGE CHANGEOVER SEQUENCE INITIATED): It is a Contact Signal (Close= Sequence Initiated) from DCS to MarkVIe indicating that Duct Burner Purge Changeover sequence is initiated. <4> 20. 231-XS-0955 (PURGE PHASE 1 COMPLETED- BYPASS STACK): It is a Contact Signal (NO, Close= Bypass Stack Purge completed) from MarkVIe to DCS indicating that Purge Phase-1 (Bypass Stack) is completed. <4> 21. 231-XS-0958 (GT LOAD > 60%): It is a Contact signal (NO, Close = GT Load > 60%) from MarkVIe to the DCS indicating that GT Load is greater than 60%. <4> 22. 231-XS-2056 (HOT GAS BYPASS VALVE OPEN COMMAND FOR PURGE): It is a Contact signal (Cls=Purge) from DCS to MarkVIe commanding the hot gas bypass valve for purging sequence. <4> 23. 231-XS-2057 (HOT GAS BYPASS VALVE OPEN/CLOSE FEEDBACK): It is a Contact signal (1=Open; 0=Close) from MarkVIe to the DCS indicating a feedback position of hot gas bypass valve. <4> 24. 231-XS-2059 (ANTISURGE VALVE OPEN/CLOSE FEEDBACK): It is a Contact signal (1=Close; 0=Open) from MarkVIe to the DCS indicating a feedback position of 1st stage antisurge valve. <4> MarkVIe vs. MarkVIeS: 1. 231-XS-703A (4FCV) (OFF SKID VALVE OPEN REQUEST FROM MARKVIE): It is a Contact Signal (Close= Valve Open) from MarkVIe to MarkVIeS indicating that Auxiliaries are started (L4=1) and Off-skid valves need to be positioned (Fuel Gas Block valve to open and Bleed valve to close). 2.

231-XS-703B (4FUEL) (ON SKID VALVE OPEN REQUEST FROM MARKVIE): It is a Contact Signal (NO, Close= Open valve) from MarkVIe to MarkVIeS for On-Skid Gas Fuel valve Open request).

3.

231-XS-703C (4FUEL_LIQ) (ON SKID LIQUID VALVE OPEN REQUEST FROM MARKVIE): It is a Contact Signal (NO, Close= Open valve) from MarkVIe to MarkVIeS for On-Skid Liquid Fuel valve Open request).

4.

231-XS-705 (4TM-REQ) (TRIP MULTIPLIER ON REQUEST FROM MARKVIE): It is a Contact Signal (NO, Close= Trip Multiplier on) from MarkVIe to MarkVIeS to activate Trip Multiplier function).

5.

231-XS-712 (4T_S) (CUMULATIVE SAFETY TRIP TO MARKVIE): It is a Contact Signal (NC, Open= Trip) from MarkVIeS to MarkVIe indicating Cumulative Trip condition).

6.

231-XS-721 (63BT) (VENTILATION SYSTEM RUNNING): It is a contact signal (NO, Close= Running) from MarkVIeS to MarkVIe indicating that the ventilation system is running.

7.

231-XS-726 P (28FDX_S) (COMBUSTION CHAMBER FLAME ON (PRIMARY)): It is a contact signal (NO, Close= Flame on) from MarkVIeS to MarkVIe indicating that the combustion chamber flame is ON.

8.

231-XS-730 (45HFA) (FILTER HOUSE GAS DETECTED ALARM TO MARKVIE): It is a contact signal (NC, Open= Alarm) from MarkVIeS to MarkVIe indicating Filter House Gas Detected Alarm condition (for any gas detector detecting a gas level of 5% LEL at filter house).

9.

231-XS-731 (45HFT) (FILTER HOUSE GAS DETECTED TRIP TO MARKVIE): It is a contact signal (NC, Open= Trip) from MarkVIeS to MarkVIe indicating Filter House Gas Detected Trip condition (for 2oo3 gas detector detecting a gas level of 10% LEL at filter house).

10. 231-XS-732 (45HDA-1) (ACC. COMPARTMENT GAS DETECTED ALARM TO MARKVIE): It is a contact signal (NC, Open= Alarm) from MarkVIeS to MarkVIe indicating Enclosure Ventilation outlet (Accessory compartment) Gas Detected Alarm condition (for 1oo3 gas detector detecting a gas level of 5% LEL at enclosure ventilation outlet). TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED NO REVISION WHERE INTRODUCED SHOWN <4> IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

87 of 94

11. 231-XS-733 (45HDT-1) (ACC. COMPARTMENT GAS DETECTED TRIP TO MARKVIE): It is a contact signal (NC, Open= Trip) from MarkVIeS to MarkVIe indicating Enclosure Ventilation outlet (Accessory compartment) Gas Detected Trip condition (for 2oo3 gas detector detecting a gas level of 10% LEL at enclosure ventilation outlet). 12. 231-XS-734 (45HDA-2) (TURBINE COMPARTMENT GAS DETECTED ALARM TO MARKVIE): It is a contact signal (NC, Open= Alarm) from MarkVIeS to MarkVIe indicating Enclosure Ventilation outlet (Turbine compartment) Gas Detected Alarm condition (for 1oo3 gas detector detecting a gas level of 5% LEL at enclosure ventilation outlet). 13. 231-XS-735 (45HDT-2) (TURBINE COMPARTMENT GAS DETECTED TRIP TO MARKVIE): It is a contact signal (NC, Open= Trip) from MarkVIeS to MarkVIe indicating Enclosure Ventilation outlet (Turbine compartment) Gas Detected Trip condition (for 2oo3 gas detector detecting a gas level of 10% LEL at enclosure ventilation outlet). 14. 231-XS-736 (45HSA) (ACC. COMPARTMENT H2S DETECTED ALARM TO MARKVIE): It is a contact signal (NC, Open= Alarm) from MarkVIeS to MarkVIe indicating Accessory compartment H2S concentration High Alarm condition. Mark Vie vs. Plant Emergency Shutdown System: 1. 231-XS-254 R (GT RUNNING STATUS): It is a contact signal (NO, Close= Running) from MarkVIe to PESD indicating the running status of GT (L3=1). 2.

231-XS-354 (GT SHUTDOWN FOR HRSG SHUTDOWN AND DIVERTER SYSTEM FAILURE TO CLOSE): It is a contact signal (Open= Shutdown) from PESD to MarkVIe commanding the Gas Turbine shutdown due to HRSG shutdown and diverter system failure to close.

3.

231-XS-454 (HRSG SHUTDOWN CONDITION RESET): It is a contact signal (Close=Reset) from PESD to MarkVIe indicating HRSG Shutdown condition Reset.

4.

231-XS-554 (DIVERTER SYSTEM CLOSE): It is a contact signal (Close=Diverter close) from PESD to MarkVIe indicating Diverter System close i.e. HRSG damper closed and Bypass stack damper Open.

5.

231-XS-654 (DIVERTER SYSTEM OPEN): It is a contact signal (Close=Diverter open) from PESD to MarkVIe indicating Diverter System open i.e. HRSG damper open and Bypass stack damper closed.

6.

231-XS-754 (TEG TEMPERATURE 56 DEG C LOWER THAN FUEL AUTO IGNITION TEMPERATURE): It is a contact signal (Close=Lower) from MarkVIe to PESD indicating Turbine exhaust Gas Temperature 56 deg. C Lower than Fuel Auto Ignition temperature.

MarkVIe vs. Bently Nevada 3500 Temperature Monitoring System: 1. 231-XS-450 (43TM_ARST) (TEMPERATURE MONITOR RESET): It is a contact signal (Close= Reset) from MarkVIe to BN Temp Monitor commanding Reset of the BN Temperature Monitor. 2.

231-XS-451 A (26TMA) (TEMPERATURE MONITOR CUMULATIVE ALARM): It is a contact signal (Open=Alarm) from BN Temp Monitor to MarkVIe indicating cumulative alarm condition of Bearing metal temperature measurement.

3.

231-YS-430 (CENTRIFUGAL COMPRESSOR THRUST BEARING TEMPERATURE TRIP): It is a contact signal (Open=Trip) from BN Temp Monitor to MarkVIe indicating trip condition of Thrust Bearing metal temperature.

4.

231-YS-451 F (86TM) (TEMPERATURE MONITOR FAULT): It is a contact signal (Open=Fault) from BN Temp Monitor to MarkVIe indicating fault condition of the BN Temperature Monitor.

MarkVIe vs. Bently Nevada 3500 Vibration Monitoring System: 1. 231-XS-400 (43VM_ARST) (VIBRATION MONITOR RESET): It is a contact signal (Close= Reset) from MarkVIe to BN Vibration Monitor commanding Reset of the BN Vibration Monitor 2.

231-XS-402 A (39VMA) (VIBRATION MONITOR CUMULATIVE ALARM): It is a contact signal (Open=Alarm) from BN Vibration Monitor to MarkVIe indicating cumulative alarm condition of Bearing vibration measurement.

3.

231-YS-402 F (86VM) (VIBRATION MONITOR FAULT): It is a contact signal (Open=Fault) from BN Vibration Monitor to MarkVIe indicating fault condition of the BN Vibration Monitor.

4.

231-YS-402 T (39VMT) (VIBRATION MONITOR CUMULATIVE TRIP): It is a contact signal (Open=Trip) from BN Vibration Monitor to MarkVIe indicating cumulative trip condition of Bearing vibration measurement.

5.

231-YS-415 (39VC-1T) (CENTRIFUGAL COMPRESSOR RADIAL TRIP): It is a contact signal (Open=Trip) from BN Vibration Monitor to MarkVIe indicating trip condition from Radial Vibration of bearings.

6.

231-YS-416 (39PC-1T) (CENTRIFUGAL COMPRESSOR AXIAL TRIP): It is a contact signal (Open=Trip) from BN Vibration Monitor to MarkVIe indicating trip condition from Axial Displacement of bearings.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

88 of 94

MarkVIe vs. Unit Control System: 1. 231-XS-601A (86PS-1) (24VDC BUS 1 FAILURE): It is a contact signal (Open=Failure) from UCS to MarkVIe indicating failure condition of 24VDC Bus 1. 2.

231-XS-601B (86PS-2) (24VDC BUS 2 FAILURE): It is a contact signal (Open=Failure) from UCS to MarkVIe indicating failure condition of 24VDC Bus 2.

3.

231-XS-602 (86PS-FG) (FIRE FIGHTING 24VDC BUS FAILURE): It is a contact signal (Open=Failure) from UCS to MarkVIe indicating failure condition of 24VDC Bus in Fire Fighting Panel.

4.

231-XS-603 (86PS-FIELD) (FIELD 24VDC POWER BUS FAILURE): It is a contact signal (Open=Failure) from UCS to MarkVIe indicating failure condition of 24VDC Bus to power field instruments.

5.

231-XS-605 (XA-1) (UCS ALARM BUZZER): It is a wet voltage contact from MarkVIe to UCS (Open= Buzzer on) indicating alarm or trip condition.

6.

231-XS-607 (49UCS) (UCS HIGH TEMPERATURE ALARM): It is a contact signal (Open=Alarm) from UCS to MarkVIe indicating high temperature inside UCS.

7.

231-XS-612 A (110V AC BUS FAILURE AT TRAINVIEW SERVER PANEL): It is a contact signal (Open=Failure) from Trainview Server Panel to MarkVIe indicating failure condition of 110VDC Bus at Trainview Server Panel.

8.

231-XS-613 A (24VDC BUS FAILURE AT TRAINVIEW SERVER PANEL): It is a contact signal (Open=Failure) from Trainview Server Panel to MarkVIe indicating failure condition of 24VDC Bus at Trainview Server Panel.

MarkVIe vs. Local Control Panel: 1. 231-XS-614 (24VDC BUS FAILURE AT LOCAL CONTROL PANEL): It is a Contact signal (Open = Bus Failure) from LCP to MarkVIe indicating 24VDC Bus failure at LCP. 2.

231-XS-615 (INVERTER FAILURE AT LOCAL CONTROL PANEL): It is a Contact signal (Open = Inverter Failure) from LCP to MarkVIe indicating Inverter failure at LCP.

3.

231-XS-616 (LCP ALARM BUZZER SIGNAL): It is a wet contact (110Vdc, Closed = Alarm buzzer on) signal transmitted from MarkVIe to DCP indicating the alarm or trip condition.

MarkVIe vs. Liquid Fuel Thyristor Panel: 1. 231-XA-5015A (LIQUID FUEL THYRISTOR PANEL FAULT): It is a Contact Signal (Open= Fault) from Liquid Fuel Thyristor Panel to MarkVIe indicating the Fault status of the Liquid Fuel Thyristor Panel. 2.

231-XL-5015A (LIQUID FUEL HEATER RUNNING STATUS): It is a Contact Signal (Close= Running) from Liquid Fuel Thyristor Panel to MarkVIe indicating the Running status of the Liquid Fuel Heater.

3.

231-XS-5015A (LIQUID FUEL HEATER CUT-OFF STATUS): It is a Contact Signal (Open= Cut-off) from Liquid Fuel Thyristor Panel to MarkVIe indicating the Cut-off status of the Liquid Fuel Heater.

4.

TIT-5014 (LIQUID FUEL HEATER TEMPERATURE): It is a (4-20) mA signal from MarkVIe to Liquid Fuel Thyristor Panel that gives analog set-point to the Liquid Fuel Thyristor Panel to turn-on or turn-off the heater based on temperature feedback of liquid fuel received from field.

MarkVIe vs. Seal Gas Heater Thyristor Panel: 1. 231-TSHH-5210A (SEAL GAS HEATER CUT-OUT STATUS): It is a contact signal (Open= Cut-Out) from Thyristor Panel to MarkVIe indicating cut-out condition of the Seal gas Heater. 2.

231-UA-5209A (TH1_F) (THYRISTOR PANEL FAULT STATUS): It is a contact signal (Open= Fault) from Thyristor Panel to MarkVIe indicating fault condition of the Thyristor Panel.

3.

231-XA-809 (SEAL GAS HEATER SET POINT TO THYRISTOR PANEL): It is a (4-20) mA signal transmitted from MarkVIe to Thyristor Panel providing Seal Gas Heater Set-point.

4.

231-XI-5209A (TH1_ON) (THYRISTOR PANEL ON STATUS): It is a contact signal (Close=ON) from Thyristor Panel to MarkVIe indicating ON condition of the Thyristor Panel.

5.

231-XI-5210A (H1_ON) (SEAL GAS HEATER ON/OFF COMMAND): It is a contact signal (Close=ON, Open = OFF) from MarkVIe to Thyristor Panel commanding ON condition of the Seal Gas Heater.

6.

231-XS-5209A (TH1_CUT) (SEAL GAS HEATER CUT OUT): It is a contact signal (Close=Cut out) from MarkVIe to Thyristor Panel commanding Cut out of the Seal Gas Heater.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

89 of 94

MarkVIe vs. Pulse Jet Panel: 1. 231-XS-522 (86PJ) (PULSE JET PANEL FAULT): It is a contact signal (Open= Fault) from Pulse Jet Panel to MarkVIe indicating Fault status of the Pulse Jet Panel. 2.

231-XS-523 (52PJ) (PULSE JET CLEANING CYCLE IN PROGRESS): It is a contact signal (Close= in progress) from Pulse Jet Panel to MarkVIe indicating Pulse Jet Cleaning in Progress.

MarkVIeS vs. Fire Fighting System: 1. 231-XS-657 TS (45FTT_S) (FIRE DETECTED TRIP TO SAFETY SYSTEM): It is a contact signal (NC, Open=trip) from Fire Fighting System to MarkVIeS indicating GT Trip due to Fire detection. MarkVIeS vs. MCC: 1. 231-XS-709 A (4BA1_C) (VENTILATION MAIN FAN CUT-OUT): It is a Contact signal (NC, Open= Cut-out) from MarkVIeS to MCC commanding the cut out of the ventilation main fan. 2.

231-XS-709 B (4BA2_C) (VENTILATION STAND-BY FAN CUT-OUT): It is a Contact signal (NC, Open= Cut-out) from MarkVIeS to MCC commanding the cut out of the ventilation stand-by fan.

MarkVIeS vs. Plant Emergency Shutdown System: 1. 231-XS-700 A (CESD-1) (CUSTOMER ESD SIGNAL 1): It is a Contact signal (Open= ESD) from PESD to MarkVIeS commanding the Emergency Shutdown (Pressurized). 2.

231-XS-700 B (CESD-2) (CUSTOMER ESD SIGNAL-2): It is a Contact signal (Open= ESD) from PESD to MarkVIeS commanding the Emergency Shutdown (Depressurized).

3.

231-XS-700 C (CESD_OP) (SAFETY TRIP REPETITION TO CUSTOMER ESD- PRESSURIZED): It is a Contact signal (NC, Open= Trip) from MarkVIeS to PESD indicating the Emergency Shutdown (Pressurized).

4.

231-XS-700 D (CESD_ODP) (SAFETY TRIP REPETITION TO CUSTOMER ESD- DEPRESSURIZED): It is a Contact signal (NC, Open= Trip) from MarkVIeS to PESD indicating the Emergency Shutdown (Depressurized).

MarkVIeS vs. Unit Control System: 1. 231-XS-717 (5ESD-R1) (ESD PUSH BUTTON FROM SAFETY RELAY- PRESSURIZED): It is a Contact signal (NC, Open= Trip) from UCS to MarkVIeS indicating the Emergency Shutdown (Pressurized). 2.

231-YZ-575 T2 (5ESD-R2) (ESD PUSH BUTTON FROM SAFETY RELAY- DEPRESSURIZED): It is a Contact signal (NC, Open= Trip) from UCS to MarkVIeS indicating the Emergency Shutdown (Depressurized).

MarkVIeS vs. Bently Nevada 3500 Vibration Monitoring System: 1. 231-XS-713 (4TM) (TRIP MULTIPLIER ON REQUEST TO VIBRATION MONITOR): It is a contact signal (Close= Trip Multiplier ON) from MarkVIeS to BN Vibration Monitor commanding the Trip Multiplier function to be ON. 2.

231-YS-426 A (39BNVT-1) (CUMULATIVE VIBRATION TRIP 1 TO ESD SYSTEM): It is a contact signal (NC, Open=Trip) from BN Vibration Monitoring System to MarkVIeS indicating cumulative vibration trip 1.

3.

231-YS-426 B (39BNVT-2) (CUMULATIVE VIBRATION TRIP 2 TO ESD SYSTEM): It is a contact signal (NC, Open=Trip) from BN Vibration Monitoring System to MarkVIeS indicating cumulative vibration trip 2.

4.

231-YS-429 (39VT) (TURBINE SEISMIC TRIP): It is a contact signal (NC, Open=Trip) from BN Vibration Monitoring System to MarkVIeS indicating Turbine Seismic Trip.

CCC vs. Unit Control System: 1. 231-XS-306 (COMMUNICATION DEVICE FAULT FOR MASTER CONTROLLER): It is a contact signal (NC, Open=Fault) from CCC Master Controller chassis to CCC Master Controller indicating communication device fault to Master Controller. 2.

231-XS-601 C (COMMUNICATION DEVICE FAULT): It is a contact signal (NC, Open=Fault) from CCC Anti-surge Controller chassis to CCC Anti-surge Controller indicating communication device fault to Anti-surge Controller.

3.

231-XS-601D (HVAC SYSTEM FAULT): It is a contact signal (NC, Open=Fault) from CCC Controller chassis to CCC Controller indicating HVAC System fault to CCC Controller.

4.

231-XS-601 E (ANTISURGE CONTROLLER POWER / FAN FAULT): It is a contact signal (NC, Open=Fault) from CCC Antisurge Controller chassis to CCC Anti-surge Controller indicating Power/ Fan fault to Anti-surge Controller.

5.

231-XS-701 E (MASTER CONTROLLER POWER/FAN FAULT): It is a contact signal (NC, Open=Fault) from CCC Master Controller chassis to CCC Master Controller indicating power/ fan fault to Master Controller.


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

90 of 94

Customer DCS vs. CCC: 1. 231-XA-0997 PROCESS REMOTE SET-POINT (CTRL OF DISCHARGE HEADER PRESSURE): It is a 4-20mA signal from Customer DCS to CCC (Master Controller) to perform Load Sharing by Controlling the Compressor Discharge Header Pressure. <4> 2.

231-XS -0305 (DISCHARGE PRESSURE CONTROL ENABLE): It is a contact signal (NO, Closed = Enable) from Customer DCS to CCC to switch over from Suction Header Control Mode to Discharge Header Control Mode. <4>

3.

231-XS-0999 (MCP_SP) (PROCESS REMOTE SET-POINT (CTRL OF SUCTION HEADER PRESSURE): It is a 4-20mA signal from Customer DCS to CCC (Master Controller) to perform Load Sharing by Controlling the Compressor Suction Header Pressure. <4>

4.

231-XS-2058 (CLOSE ANTISURGE VALVE FOR PURGE): It is a contact signal (Cls=Purge) from Customer DCS to CCC commanding the antisurge valve for purging sequence. <4>


DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

91 of 94

8 CONTROL INTERFACE WITH WASTE HEAT RECOVERY UNIT CONTROL SYSTEM 8.1.1 INTERLOCK SIGNALS <4> JOB TAG 231-XS-0958 231-XS-0955 231-XS-0954 231-XS-254 R 231-XS-354 231-XS-454 231-XS-554 231-XS-654 231-XS-754 231-XS-960 231-XS-961

DESCRIPTION GT Load Greater than 60% Purge Phase 1 completed (Bypass stack) Duct Burner Purge Changeover Sequence initiated GT Running Status GT Shutdown for HRSG Shutdown and Diverter System failure to close HRSG Shutdown condition Reset Diverter System Close Diverter System Open Teg temperature 56 deg. C lower than Fuel Auto Ignition temperature Duct Burner Purge Completed GT Load Greater than 60%

FROM MarkVIe MarkVIe DCS MarkVIe PESD

TO DCS DCS MarkVIe PESD MarkVIe

TYPE HW HW HW HW HW

PESD PESD PESD MarkVIe

MarkVIe MarkVIe MarkVIe PESD

HW HW HW HW

BMS MarkVIe

MarkVIe BMS

HW HW

8.1.2 SOFTWARE DESCRIPTION GT + HRSG PURGE & START UP (GT/BMS SYSTEMS LOGIC – DCS LOGIC) A purge of both the HRSG enclosure and by-pass system shall be completed prior to the light-off of the GT and prior to the admission of combustion turbine exhaust gas into the HRSG. The purge sequence (GT+HRSG) shall be managed by MarkVIe. Purge shall be accomplished by at least five volume changes and for duration of not less than 5 minutes. During the purge, the flow rate shall be not less than 8% of GT full-load mass air-flow. Depending on the availability of the HRSG, the followings two cases have to be considered: First case - HRSG available When the HRSG is available, the GT can operate in combined cycle mode. In this case both the by-pass stack and the HRSG must be purged. With all the following purge permissives MarkVIe can start the GT/HRSG purge sequence: • HRSG shutdown not present (231-XS-454) • No GT shutdown causes present and GT trip condition reset (231-XS-254 R) • Diverter damper system close (231-XS-554) that indicates the condition HRSG damper closed & bypass stack Damper open from PESD) • GT not firing • GT flow rate not less than 8% of GT full-load mass air-flow The GT+HRSG purge sequence will purge first the By-pass stack (phase 1) and then the HRSG duct (phase 2). At the end of the phase 1, the MarkVIe will send to DCS the hardwire signal 231-XS-0955 (Purge phase 1 completed by GTS) in order to open the diverter system dampers allowing the purge sequence to proceed with the phase 2. The phase 2 is allowed to proceed when the Diverter System Open (231-XS-654) signal is obtained from PESD. The Diverter system Open condition is equivalent to HRSG damper open and by pass TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: NO REVISION REVISED WHERE INTRODUCED SHOWN <4> IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

92 of 94

damper in closed condition.<4> The purge rate, volume changes and duration will be provided by MarkVIe for both phases. At the purge end (i.e. both the phase 1 and the phase 2 are completed), the GTS will have the permissive to put the GT in service in combined cycle mode through the HRSG. The following signals shall be available from MarkVIe to DCS, by serial link: • GT+HRSG Purge requested • GT+HRSG Purge in progress (phase 1, phase 2) • GT+HRSG Purge completed (phase 1, phase 2) • GT+HRSG Purge interrupted (phase 1, phase 2) HRSG purge in Fresh Air (FA) mode The Phase 2 (HRSG duct purge by GTS) could be replaced, as alternative, by the duct burner purge performed in FA mode (FA duct burner purge sequence managed by BMS logic). In this case, after the HRSG duct purging in FA mode the DCS logic, with all the following permissives: • NOT GT Running (~231-XS-254 R) • HRSG in FA mode • HRSG isolation provided and maintained • Duct burner purge completed by BMS (after HRSG isolation provided and maintained) (231-XS-960) HRSG duct purging in FA mode enabled by DCS (selection by operator) shall transfer the system to Combined Cycle mode by the following way: when GTS sends the hardwire signal (231-XS-0955) to DCS (purge phase 1 completed by GTS) then the DCS will execute the following sequence: <4> • Diverter damper system open command • Set the signal: Duct Burner Purge change-over sequence initiated (231-XS-0954) <4> With the signal, Diverter damper system NOT in close position (~231-XS-554) the DCS shall carry out: • FA duct damper close command (hardwired signal sent to the Diverter Damper System) With the resulting signals: • Diverter damper system in open position & FA duct damper in close position (xx seconds delayed) The DCS shall carry out: • FA fan stop command (FA fan damper will close) • Reset the signal: Duct Burner Purge change-over sequence initiated (231-XS-0954) <4> The signal: Duct Burner Purge change-over sequence initiated is reset also if at least one of the following conditions is detected: • HRSG Shutdown • GT running (231-XS-254 R) • GT trip (from PESD to DCS) • Purge phase 1 completed (231-XS-0955) NOT present <4> This signal is reset, in any case, after a prefixed time (about xx seconds, to allow the complete execution of the transfer sequence to CC mode). MarkVIe will set the condition purge phase 2 completed and will have the permissive to put the GT in service in combined cycle mode, through the HRSG, when MarkVIe verifies the following condition: • Purge phase 1 completed (231-XS-0955) & <4> • Duct Burner Purge Completed (231-XS-960) from BMS (10 sec Off-Delay in order to allow the diverter opening) & • Duct Burner Purge change-over sequence initiated (231-XS-0954) & <4> • Diverter Dampers system in open position (231-XS-654). TITLE: CONTROL SYSTEM FUNCTIONAL DESCRIPTION REVISION DESCRIPTION: REVISED WHERE SHOWN <4> NO REVISION INTRODUCED IN THIS PAGE

DOCUMENT CODE

REVISION


18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

93 of 94

Second Case - HRSG not available If HRSG shutdown is present (HSRG not available), the GT can operate only in open cycle mode. In this case, MarkVIe can start the GT purge sequence through the by-pass stack (phase 1) if all the following purge permissives are fulfilled: • No GT shutdown causes present and GT trip condition reset from MarkVIe • Diverter damper system close (231-XS-554) • GT not firing • GT flow rate not less than 8% of GT full-load mass air-flow The purge rate, volume changes and duration shall be decided by MarkVIe. At the end of the phase 1 (GT+ By-pass stack purge completed), MarkVIe will have the permissive to put the GT in service in open cycle mode (through the by-pass stack). During combined cycle operation and following the GT+HRSG purge as above indicated, the combustion turbine shall be permitted to switch in open cycle mode (by closing the diverter system dampers by DCS) and to purge and operate in open cycle through the by-pass stack. When GT has operated in open cycle through the by-pass stack, then the HRSG purged condition shall be reset. In this case the TEG shall not be permitted to re-enter the HRSG at a later time without HRSG repurging (the opening of the diverter system dampers shall not been allowed by DCS and PESD). With GT running in open cycle mode through the by-pass stack, then the following two scenarios can be considered: •

HRSG duct shall be purged in FA mode (FA duct burner purge sequence managed by BMS logic. In FA mode it shall be possible to light-off the auxiliary fire burner and start up the HRSG; then the TEG shall be permitted to re-enter the HRSG at a later time (by activating the manual change over sequence from FA mode to CC mode, without lowering the GT load. TEG shall not be permitted to re-enter the HRSG if the HRSG is not in service, pressurized and in hot state.

•

The GT is operated with an exhaust gas temperature at least 56°C lower the auto-ignition temperature of fuels (231-XS-754) designed for use in the GT and in the Duct burner (TEG temp. <= xxx °C, to be defined - 231-XS-957).In this case th e TEG, at this lower temperature, shall be permitted to re-enter the HRSG (by opening the diverter system dampers by DCS) and shall be used to perform the duct burner purge (monitored by BMS). After the duct burner purge (hardwired signal from BMS to MarkVIe 231-XS-960), MarkVIe will have the permissive to increase the load. Further limitations in TEG temperature are foreseen according to the actual status of HRSG.

NOTE 1) HRSG isolation shall be considered maintained when all the following conditions are satisfied: • HRSG damper close (hardwired signal from PESD to DCS) • Sealing air pressure > min (xx sec maintained in order to allow sealing fans change over) (hardwired signal from PESD to DCS)


DOCUMENT CODE

REVISION

SOM6629548 PAGE MARKER Undef. ORIGINAL JOB

18000571800057-58

4 SECURITY CODE

N SIZE

4


LANGUAGE

A SHEET

94 of 94

control System Functional Description(Feed Gas Compressor)

Recommend Documents