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An abnormal load shed behaviour of GT-1/2 was observed on Dated 04-Aug-2010 at 18:00 hrs. Complex was running on 195 MW load and system frequency was Low. 48.8 Hz. Suddenly Complex load dropped down to 183 MW. It was observed that GTG-1 which was previously running on 63.03 MW load came on 49.9 MW load (Total load shed was 13 MW). GTG-2 remained stable that time. After few seconds GTG-1 load started increasing but than GTG-2 shed load from 64.37 MW to 58 MW (Total load shed was 6.5 MW) which started increasing same time.
GTG-1 repeated its load shed behaviour at about 19:30 hrs and 20:00 hrs same day, But this time GTG-2 didn't shed load also this time frequency was not that low i.e. 48.8 Hz.
Next day at 07:09 hrs GTG-2 shed 4 MW but the frequency was normal.
GT-1 trend shows that when M/c shed its load, following main parameters were found disturbed,
IGVs angle
IBH valve
FG GCV positions / Exhaust Temps
speed
I have also the trends of that sCenario if someone need that than i am ready to provide that trends but i need a solution this is a matter of serious concern
GTG-1 repeated its load shed behaviour at about 19:30 hrs and 20:00 hrs same day, But this time GTG-2 didn't shed load also this time frequency was not that low i.e. 48.8 Hz.
Next day at 07:09 hrs GTG-2 shed 4 MW but the frequency was normal.
GT-1 trend shows that when M/c shed its load, following main parameters were found disturbed,
IGVs angle
IBH valve
FG GCV positions / Exhaust Temps
speed
I have also the trends of that sCenario if someone need that than i am ready to provide that trends but i need a solution this is a matter of serious concern