PSS/E crashes if i do not use a small integration step with user model , should it just not converge during the simulation??

asked 2019-10-16 10:49:28 -0500

marilyn3
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updated 2019-10-16 10:55:02 -0500

I'm working with a user model from a PV plant (Inversor and Plant controller) but if i do not change the dynamic parameter DELT to like 1/16 of a cycle, it crashes PSS/E after the initialization , i get to the point of "Initial conditions OK" but after some cycles it crashes, any thoughts on this? i only have the dynamic library so i dont know whats inside the model

i get the error from Intel Visual Fortran Runtime error "Invalid Floating-Point number" psseng.dll _FRQINI@O 1144 RUN.F psspyc.pyd unknown python25.dll unknown

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answered 2019-10-17 12:44:28 -0500

jconto
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The error message have the string "python25.dll unknown".

Are you running PSSe v.32? or is the UDM in v.32 but running in PSSe v.33?

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I am using PSS E v32 and the UDM dll is supposed to be for v32 too , do you know what is this error "Invalid Floating-Point number" psseng.dll _FRQINI@O 1144 RUN.F??

marilyn3 ( 2019-10-17 14:31:27 -0500 )edit

No, I have not seen such error before.

jconto ( 2019-10-18 10:57:59 -0500 )edit

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answered 2019-10-17 01:35:12 -0500

perolofl

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It might be a very short time constant in the model that causes the crash. Check the parameters and increase any small time constants to about 3 times the time step.

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thanks i have changed the time step and no problem now , i just thought it was a little weird that pss e crashed because of DELT, never happened to me before

marilyn3 ( 2019-10-17 14:33:06 -0500 )edit

Agreed that software should not crash for minor parameter issues like this one