What is the relationship between GREF and PMECH

asked 2024-11-19 11:39:58 -0500

Based on this PPSPY post "What is the base value for the generator GREF? " the GREF is represented as

 GREF = DROOP*PMECH

However, I sometimes encounter cases where this equation is not giving the expected answer compared to PSSE simulations. Is this GREF equation a general equation for all governor models? or is the equation different for different models?

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answered 2024-11-19 14:48:03 -0500

perolofl

3312 ●1 ●8 ●18

The equation is for TGOV1 governors only!

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Thanks perolofl. Is there a source or guide on how to approach other governors? I found some other PSSE governor models where the equation still holds, and some where it holds in GSTR simulation, but not in grid-connected. While other times, it does not apply at all

Mohamed_M ( 2024-11-19 16:07:44 -0500 )edit

You have to do the same as PSSE does at initialisation! Calculate backwards into the model starting with output signal PMECH. Signal speed is zero.

perolofl ( 2024-11-20 03:21:31 -0500 )edit

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Asked: 2024-11-19 11:39:58 -0500

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What is the relationship between GREF and PMECH

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