First time here? We are a friendly community of Power Systems Engineers. Check out the FAQ!

Ask Your Question
0

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

asked Oct 16 '19

marilyn3 gravatar image

updated Oct 16 '19

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

2 answers

Sort by » oldest newest most voted
0

answered Oct 17 '19

jconto gravatar image

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?

link

Comments

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 gravatar imagemarilyn3 (Oct 17 '19)

No, I have not seen such error before.

jconto gravatar imagejconto (Oct 18 '19)
0

answered Oct 17 '19

perolofl gravatar image

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.

link

Comments

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 gravatar imagemarilyn3 (Oct 17 '19)

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

Ascegan gravatar imageAscegan (Jan 21 '0)

It seems to be a badly written user model. The model should ignore time constants smaller than two time steps.

perolofl gravatar imageperolofl (Jan 23 '0)

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.
Want to format code in your answer? Here is a one minute demo on Youtube

Add Answer

[hide preview]

Question Tools

2 followers

Stats

Asked: Oct 16 '19

Seen: 972 times

Last updated: Oct 17 '19