Cylindrical rotor generator power under loss of excitation

[niaz]

Hello all,

I want to know about turbo alternator real power producing capability under loss of excitation condition.

Normally in salient pole rotor have capability to supply real power under field current=0 condition, as there is reluctance power developed. But what about non salient pole generator? there is no saliency. So, there is not possibility to develop reluctance power. Does it mean that, this type of turbo generator is totally prohibited to run under loss of excitation condition?

 

[anorlunda]

I found this cool video that should answer your questions.

https://www.slideshare.net/mmuralintpc/loss-of-excitation

 

[niaz]

I found this cool video that should answer your questions.

https://www.slideshare.net/mmuralintpc/loss-of-excitation

Thank you for your reply. I have watched this presentation before. Look very carefully this presentation, here also described about "salient Pole Rotor" alternator. But I need the behavior of "None salient Pole rotor" during this situation.

 

[anorlunda]

Think of this figure from the video. It applies to both round rotor and salient pole synchronous generators.
There are many constraints on generator operation. Many of them are seen in this figure.

 

[jim hardy]

Does it mean that, this type of turbo generator is totally prohibited to run under loss of excitation condition?

You'd certainly not want it connected to the grid with no field .
As it develops slip high voltages induced in the field will wreck something.
Shorting the field would allow some power generation as an induction machine with amortisseur windings and shorted field carrying rotor current. But i don't know of anyone who's done that with a generator of any size. Some synchronous motors are started that way, though.

 

[niaz]

Thank you for cooperations