The requirements on network control systems are growing as secure and economic energy management is becoming ever more important. Planning and implementation of SCADA systems (Supervisor…Descripción completa
requirements about the bybrid system design and elaboration
Power System Economics notes : Optimal power flow, economic load dispatch, Hydro thermal Coordination
Analysis on Power System-I
A Chakraborty Power System
Digital Power System Protection by bhide
power system security
12.OCT 2007
Security Level: Internal Open
Recti tiffie ierr Power System www.huawei.com
HUAWEI TECHNOLOGIES Co., Ltd.
HUAWEI Confidential
1
Brief Introduction of Power System
Rectifier (AC/DC Power supply) such as Delta2000w &Delta1200w,Emerson1800w and 2000w is below.
Delta2000w
R48-1800A
Delta 2900 HUAWEI TECHNOLOGIES Co., Ltd.
R48-2800E
Eltek 1500
Emerson 2000E HUAWEI Confidential
Delta2900w
Eltek 1500 Page 2
2
Maintenance of Power System
(3)LLVD: Load Low Voltage Disconnection. Once the AC input fail down, the battery discharging and the voltage come down to the LLVD voltage such as 44V, then the load connected to the LLVD contactor will be disconnected to protect the BLVD load.
+ bus bar AC Input
Battery1 BLVD
AC/DC Rectifier
Contactor -bus bar
(4)BLVD: Battery Low Voltage Disconnection. Once the AC input broken down and LLVD contactor is disconnected, the battery voltage still goes down to the BLVD voltage such as 43.2V,then the load connected to the BLVD contactor will be disconnected to protected the battery. Notice: Load connected to BLVD is not battery, but the important load such as transport or optical telecom equipment. Generally the power of BLVD load is smaller than the power of LLVD load.
HUAWEI TECHNOLOGIES Co., Ltd.
Battery2
LLVD Contactor
MCB
32A 32A
Fuse
10A 10A 100A 100A 100A
PS48300/1800-X6 Power system LLVD and BLVD diagram The parts in the red dashed fr ame is the parts in power system.
HUAWEI Confidential
Page 3
3
Emerson 2000E Rectifier System
PL to PL breakers are for Priority load and NPL for non priority loads and alarm card as well NPL Load breakers (non priority load)
PL Load breakers (priority load)
Rectifier Alarm Card PS48300/1800-X6 Power system LLVD and BLVD diagram The parts in the red dashed fr ame is the parts in power system.
HUAWEI TECHNOLOGIES Co., Ltd.
HUAWEI Confidential
Page 4
4
Delta 2000 Rectifier System
PL to PL breakers are for Priority load and NPL for non priority loads and alarm card as well
