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Reconnecting Generators During Dynamic Simulation

asked 2015-08-11 18:09:48 -0500

Lassettc gravatar image

Hi there,

I've been attempting to create a dynamic simulation that will allow one to trip a generator then bring it back online. My problem is that when I bring the generator back online it will oscillate down to zero. I'd like to find a way to run the dynamic simulation to trip the generator (the other generators will compensate accordingly), then bring the other generator back which will begin providing the same power generation as it did beforehand (the other generators will step back adequately to allow this). I'm stuck how to go about this.

Thanks!!

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answered 2016-09-19 09:26:44 -0500

perolofl gravatar image

The correct answer is that it is NEVER allowed to reconnect a generator during a dynamic simulation, even if PSSE doesn't prohibit you from doing it! I.e. never change the status from 0 to 1 for a generator in a dynamic simulation!!!

If you want to resynchronize a generator in PSSE you have to disconnect the step-up transformer and thereby keeping the generator running in a separate island, and reconnect the transformer after a certain time. The isolated generator will accelerate so you should syncronize again at a proper time in order to avoid too large angle difference.

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answered 2015-08-17 20:24:39 -0500

Jacde gravatar image

It sounds like the generator's governor response is seeing that when it is connected frequency is increasing so it is shoving it down to zero and for some reason that governor is dominating the response.

One thing you might be able to try (never done it before so idk if it works) is setting the governor of that machine out of service before introducing it back online. Let the other machines ramp their power outputs down some, then put the governor in service. This would be akin to putting the generator in manual mode while connecting it and then switching it to automatic mode.

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Asked: 2015-08-11 18:09:48 -0500

Seen: 1,654 times

Last updated: Sep 19 '16