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asked Nov 22 '2

CPReddy gravatar image

FLOW1 function output not matching with Load Flow Solution

I have written a power plant controller model in PSSE. I need to initialize the PPC model with remote branch flow. I used the FLOW1() function to get the active and reactive power flow of the remote branch. Somehow there is a difference in the results between the steady-state model and this function output. The difference is very minor (0.02 MVAR). Due to this, I am getting initial suspects in the PSSE model, which is not accepted by many utilities.

CALL FLOW1(M+1,L+2,L+3,L+4) Q = VAR(L+2)

from load flow Q = 16.0042 MVAR, but from VAR(L+2) it is 15.99409 MVAR. Even though the difference is very small but it will show as a suspect.

Kindly help me to resolve this issue.

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No.2 Revision

FLOW1 function output not matching with Load Flow Solution

I have written a power plant controller model in PSSE. I need to initialize the PPC model with remote branch flow. I used the FLOW1() function to get the active and reactive power flow of the remote branch. Somehow there is a difference in the results between the steady-state model and this function output. The difference is very minor (0.02 MVAR). Due to this, I am getting initial suspects in the PSSE model, which is not accepted by many utilities.

CALL FLOW1(M+1,L+2,L+3,L+4) Q = VAR(L+2)VAR(L+3)

from load flow Q = 16.0042 MVAR, but from VAR(L+2) VAR(L+3) it is 15.99409 MVAR. Even though the difference is very small but it will show as a suspect.

Kindly help me to resolve this issue.