## Answer

Oct 17, 2014 - 09:11 AM

P,Q are not instantaneous quantities. What the model is doing is continuously adjusting it's impedance according to measured P,Q.

HI, I am studying the fixedload example in the pscad. the fourth fixed load is simulating the inductive load - modelling as a constant power load. the configurations is

Also, from the online help system, I know that

Therefore, since the NP,NQ K_PF,K_QF is zero. it mean that P will stay constant as P_O, and Q will stay consant as Q_O. But from the simulation results. P and Q is varying with time. Why this happens?

The voltage and frequency is

Also, from the online help system, I know that

Therefore, since the NP,NQ K_PF,K_QF is zero. it mean that P will stay constant as P_O, and Q will stay consant as Q_O. But from the simulation results. P and Q is varying with time. Why this happens?

The voltage and frequency is

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Open Sep 07, 2014 - 10:56 PM

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Oct 17, 2014 - 09:11 AM

P,Q are not instantaneous quantities. What the model is doing is continuously adjusting it's impedance according to measured P,Q.

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