Wind Turbine Generator Self-Excitation once isolated from Grid
Wind Turbine Generator Self-Excitation once isolated from Grid
(OP)
Question: Considering a 34.5kV feeder with dozens of WTGs (wind turbine generators), once the 34.5kV feeder breaker opens, will the WTGs be self-excited and continue energizing the islanded feeder?
My opinion is that, since there will be a sudden active power changes, there will be a large frequencey change, at least frequency elements of WTGs will take theirself down. Voltage elements of WTGs may also take theirself down. It may not happen instaneously due to the voltage ride through ability and the frequency ride through ability.
Appreciate your expertise and any supporting documents.
Will the type of WTG (induction and synchronous) change your answer?
If the 34.5kV feeder breaker opens, what voltage changes will be at each WTG, up, down, no change?
Thank you,
Regards,
Bing
My opinion is that, since there will be a sudden active power changes, there will be a large frequencey change, at least frequency elements of WTGs will take theirself down. Voltage elements of WTGs may also take theirself down. It may not happen instaneously due to the voltage ride through ability and the frequency ride through ability.
Appreciate your expertise and any supporting documents.
Will the type of WTG (induction and synchronous) change your answer?
If the 34.5kV feeder breaker opens, what voltage changes will be at each WTG, up, down, no change?
Thank you,
Regards,
Bing






RE: Wind Turbine Generator Self-Excitation once isolated from Grid
The windmill was set up to feather when the load when away. It also had a disk break to stop and lock the shaft. I didn't get a chance to get a good look at the inverter. A 4,350 amps DC in and 34 KV AC out I am sure it was quite sophisticated.
RE: Wind Turbine Generator Self-Excitation once isolated from Grid
Regards
Marmite