Pelec calculation based on Efd

asked 2017-03-03 14:38:22 -0600

eve
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Hi folk,

Anyone knows what is the reference voltage for the exciter field voltage Efd? I'm trying to calculate Pelec two different ways but either of them can match the Pelec given by PSS/E. So I wonder if the Efd and Vbus are in different reference settings. Or there are some other reasons for this?
I provided the process for the calculation below: (Noted: All the angles are in absolute values)

Pelec = EfdVbussin(rotor angle)/Xs.

Pelec =real{ Efd[cos(rotor angle) + jsin(rotor angle)] conj (I)}

where

I = {Efd[cos(rotor angle) + jsin(rotor angle)] - Vbus[cos(bus angle) + jsin(bus angle)]} / jXs

Thank you , Eve. :)

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answered 2017-03-04 05:53:59 -0600

lmcqueen
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Did you try to use Eterm instead?

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Hi, Eterm is actually Vbus but I need internal field voltage which is Efd in PSS/E.

eve ( 2017-03-08 01:35:09 -0600 )edit

My mistake, yes I agree. Is this a flat run simulation?

lmcqueen ( 2017-03-10 05:30:02 -0600 )edit

Hi, Eve, I also tried to calculate Pe based on your equation. Did you find out the way to calculate the correct PELEC ?

dunguyen9003 ( 2020-07-22 22:10:15 -0600 )edit

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Asked: 2017-03-03 14:38:22 -0600

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Last updated: Mar 04 '17

Pelec calculation based on Efd

Pelec = EfdVbussin(rotor angle)/Xs.

Pelec =real{ Efd[cos(rotor angle) + jsin(rotor angle)] conj (I)}

I = {Efd[cos(rotor angle) + jsin(rotor angle)] - Vbus[cos(bus angle) + jsin(bus angle)]} / jXs

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Pelec calculation based on Efd

Pelec = EfdVbussin(rotor angle)/Xs.

Pelec =real{ Efd*[cos(rotor angle) + jsin(rotor angle)] * conj (I)}

I = {Efd[cos(rotor angle) + jsin(rotor angle)] - Vbus[cos(bus angle) + jsin(bus angle)]} / jXs

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Pelec =real{ Efd[cos(rotor angle) + jsin(rotor angle)] conj (I)}