Generator is an important equipment of the Power Station to provide electric power supply to the industrial and domestic consumers in the country. The growing demand of power supply has also increased the size and capacity of the generators. The maintenance of the uninterrupted power supply to the grid obviously draws one’s attention to the efficient operation and maintenance of the generator.
The efficient operation of generator means the knowledge and fleibility of the various performance parameters of the generator and their limits during its operation under stable operating conditions as well as under fault condition.
This manual covers the various performance parameters and their lim its while the generator is in service! it also covers effects of load variation " the change in generator parameters without eceeding their limits for stable operation.
This manual will prove very useful for the Power Sector Personnel.
1
2.
COMPONENTS OF TURBO-GE -GENERAT RATOR
#.$ G%&%'() The #$* +, turboturbo-gen genera erator tor incorp incorpora orates tes the modern modern featur features es of direct direct cooling with .+. ,ater and /ydrogen gas and fast acting ecitation system.
0urther technical specifications of #$* +, turbo-generator type T/,-#$*-# are as follows1
+aimum continuous 2, rating +aimum continuous 24( rating 'ated terminal voltage 'ated stator current 'ated power factor 'ated ecitation current at +<' condition Slip ring voltage at +<' condition 'ated speed 'ated frequency %fficiency at +<' condition 'ated /ydrogen gas pressure >gauge? Short circuit ratio &ega &egati tive ve sequ sequen ence ce capa capabi bilit lity y ire irect ctio ion n of rotat rotatio ion n when when viewe viewed d from from slip slip ring ring
end. Phase connection &o. of terminals brought out
ouble Star >BCB? 9 >; >; ne neutral " 7 phase?
OVERALL DIMENTIONS AND WEIGHTS $. #. 7. 5. 8.
Dverall dia of stator )ength of stator )ength of rotor iameter of rotor barrel ,eight of the heaviest
single
2
piece
79;* mm ;8:* mm 966* mm $*68 mm for $68*** kg.
2.
COMPONENTS OF TURBO-GE -GENERAT RATOR
#.$ G%&%'() The #$* +, turboturbo-gen genera erator tor incorp incorpora orates tes the modern modern featur features es of direct direct cooling with .+. ,ater and /ydrogen gas and fast acting ecitation system.
0urther technical specifications of #$* +, turbo-generator type T/,-#$*-# are as follows1
+aimum continuous 2, rating +aimum continuous 24( rating 'ated terminal voltage 'ated stator current 'ated power factor 'ated ecitation current at +<' condition Slip ring voltage at +<' condition 'ated speed 'ated frequency %fficiency at +<' condition 'ated /ydrogen gas pressure >gauge? Short circuit ratio &ega &egati tive ve sequ sequen ence ce capa capabi bilit lity y ire irect ctio ion n of rotat rotatio ion n when when viewe viewed d from from slip slip ring ring
end. Phase connection &o. of terminals brought out
ouble Star >BCB? 9 >; >; ne neutral " 7 phase?
OVERALL DIMENTIONS AND WEIGHTS $. #. 7. 5. 8.
Dverall dia of stator )ength of stator )ength of rotor iameter of rotor barrel ,eight of the heaviest
single
2
piece
79;* mm ;8:* mm 966* mm $*68 mm for $68*** kg.
;. 6.
tran transp spor orta tati tion on >sta >stato torr with with gas gas cool cooler ers s and and lifting trunnions? ,eight of rotor 5##** kg Total weight of generator #6**** kg
TEMPERA TEMPER ATURE RAT R ATINGS INGS $. #. 7.
5.
mea >measu sure red d by embedded resistance thermometers? +aimum temperature of stator winding >measured by embedded resistance thermometers? +aimum temperature of rotor winding >measured by resistance method?
EF’ $*8° < $*8° <
$$* $$*° <
HYDROGEN IN STATOR CASING $. #. 7. 5. 8. ;. 6.
Perm Permis issi sibl ble e pres pressu sure re norm normal al Pressure variation &omi &omina nall tem tempe pera ratu ture re of cold cold gas gas +inimum percentage purity of /# inside machine Dygen content - maimum uantity of /# ga gas required for initial filing uantity of /# requ require ired d when when gene genera rato torr is running +aimum allowable moisture contents in casing.
line? &o. of gas coolers uncoupled? 0ly wheel moment of rotor 'atio of S.<. torque to full load torque Fasi Fasic c impu impuls lse e insu insula lati tion on leve levell >wit >with h resp respec ectt to body body?? Fasic impulse insulation level >between turns? calc >calcul ulat ated ed valu value? e? in hot condition. 9. uantity of oil for both shaft seals $*. Dil pressure at inlet of bearings