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Dynamics of starting a generator

asked 2022-12-22 12:59:49 -0600

miltonfrey gravatar image

Is there a way to simulate a generator starting up and simulate the resulting inrush current and voltage sag?

I am looking specifically at a weak system during power system restoration from blackout, starting the first two or three baseload generators after blackstart units are online and cranking paths have been established.

The problems I have run into so far are that I should not change a generators status as seen in "Reconnecting Generators During Dynamic Simulation". (Can't post links due to karma). That post also mentions having the generator on a separate island, however in this case that would require that the generator already be online, and it would have to be a swing machine. I don't believe that would be the correct simulation for this scenario.

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answered 2022-12-22 13:44:17 -0600

perolofl gravatar image

It is the correct way to do the black start simulation.

Every generator to be connected to the system during the simulation must be on-line as stand-alone islands in load flow, i.e., each generator bus is a swing. Note, one island for each generator to be synchronised.

Synchronising is done during simulation by switching on the step-up transformer. Each generator will have 0 pu speed deviation (50/60 Hz) up till the point of synchronisation. Be sure to synchronise when the frequency and the bus rotor angles of the two transformer buses (generator bus and high tension side) are fairly close.

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I must say I'm surprised. Okay, I will go ahead and see what I can do. Thanks for the help.

miltonfrey gravatar imagemiltonfrey ( 2022-12-22 13:50:27 -0600 )edit

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Asked: 2022-12-22 12:59:49 -0600

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Last updated: Dec 22 '22