Answer
Mar 09, 2020 - 05:53 PM
I did not see an answer but I would like to help. Actually increasing the capacitance value will decrease the impedance and the possibility of a short. If you can share your model, we can help better.
Minimum capacitance value?
Hello everyone, I developed a circuit-breaker model with the aim of studying the TRV phenomena, which has an stray capacitance chamber of 150pF (0.00015uF).
For this purpose, I used a common "Capacitor" model, but when I had compiled the model an Error ocurred with the following message "Branch path shorted -> $A $B 0 0 0.00015". As a consequence, I changed the value until it dissapeared at a 0.001uF capacitance value.
I find this issue a particulary disturbing one, since it not only affects TRV analysis, but also insulation coordination ones where the stray capacitances representation is absolutely relevant and their values are generally low (pFs)
Does anyone know it is a real limitation of the software or it is a setting I may change?
Thanks in advance.
Regards.
For this purpose, I used a common "Capacitor" model, but when I had compiled the model an Error ocurred with the following message "Branch path shorted -> $A $B 0 0 0.00015". As a consequence, I changed the value until it dissapeared at a 0.001uF capacitance value.
I find this issue a particulary disturbing one, since it not only affects TRV analysis, but also insulation coordination ones where the stray capacitances representation is absolutely relevant and their values are generally low (pFs)
Does anyone know it is a real limitation of the software or it is a setting I may change?
Thanks in advance.
Regards.
Status:
Open Mar 20, 2019 - 06:24 AM
Modelling in PSCAD, TRV, limitation, insulation coordination
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