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Calculating centre of inertia frequency, scaling?

asked 2018-03-15 09:35:04 -0500

anonymous user

Anonymous

Hey there,

I have code that acquires all frequencies and is used to find COI frequency to find ROCOF on COI frequency, so I can use the ROCOF to estimate system inertia when certain contingencies occur.

To make COI frequency, I need to scale the machines' frequency contribution. I do not understand what Mbase is. Is it equivalent to inertia constant or rated power? If not, how can I get these two values from PSSE? I've spent so long looking around.

Thank you for your time.

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answered 2018-03-20 17:13:48 -0500

perolofl gravatar image

updated 2018-04-05 02:14:01 -0500

Mbase is the rated MVA power of the generator. The inertia constant H is found in the dynamic generator model.

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Asked: 2018-03-15 09:35:04 -0500

Seen: 149 times

Last updated: Apr 05 '18