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REGCA models erros in dynamics

asked 2020-12-09 22:27:36 -0500

bert gravatar image

updated 2020-12-09 22:31:41 -0500

hi i am using REGCAU, REECAU, REPCAU and i've been getting these errors but i cant derive where it come from even looked at the MODELS document of PSSE

ERROR 1 REPCAU1 AT BUS 2047 MACHINE '1 ': Q COMMAND 0.2545 EXCEEDS MAXIMUM 0.2545

it says in MODELS document Qpu. i understand it is QMax QMin, but is it Qmax/Mbase? to get Qpu

but sometimes if i follow the above formula, there will be error again, making it seems the formula is Qmax / 10

so im thinking what is the real formula?

ERROR 2 REECAU1 AT BUS 2047 MACHINE '1 ': REACTIVE CURRENT 0.3630 EXCEEDS MAXIMUM 0.3365

im having hard time figuring out where did the .3365 come from? i even change the Qgen and Qmax but no change happen. is there a formula for that? or any related that i can do to change/correct that?

Also the REACTIVE CURRENT .3630 is that the Qgen/Mbase?

thank you so much in advance for your answers. God Bless! i apologize if these questions seems basic

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answered 2020-12-10 00:11:51 -0500

SqFKYo gravatar image

From purely utilitarian view point this is how I understand it:

Reactive current exceeds type of error messages mean that you have dynamic limits in dyr/snp set to lower than what the system gets as the initial values from the power flow calculation.

Solving this issue usually means changing the Usched in the power flow solution to force the generator close to 0 reactive power or changing the limits on the dynamic side. Naturally changing the model will affect how it performs, but this is in my understanding what causes these issues.

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thank you! ill look into that. quick question but for this, REECAU J+13 QMax (pu), limit for reactive power regulator --> is the Qmax pu in terms of MachBase or System Base?

bert gravatar imagebert ( 2020-12-10 08:36:06 -0500 )edit

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Asked: 2020-12-09 22:27:36 -0500

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Last updated: Dec 10 '20