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How to simulate an inverter commutation failure in a two-terminal dc link?

asked 2020-09-15 23:30:18 -0500

cresg gravatar image

I have a two-terminal dc link in my network with a CDC4T model. I have referred to PAGV2 and it reads, "To simulate an inverter commutation failure, bypass the inverter and apply an ac system shunt at the inverter with a reactance equaling the leakage reactance of the converter transformer".

Normally, when commutation failure occurs, the direct current increases instantly and the extinction angle (gamma) decreases below gamma minimum. I tried the approach dictated by PAGV2 but the results do not fit in the commutation failure scenario. In my case, the reverse is happening, i.e., direct current decreases and gamma increases.

I would really appreciate any help.

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answered 2020-09-16 02:51:03 -0500

perolofl gravatar image

What you see in PSSE is the bypass of the inverter, not the effect on the HVDC of a commutation failure. On the AC side the commutation failure is modeled with a shunt. You need a Pscad-study to see the dynamics of the link during a commutation failure.

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Asked: 2020-09-15 23:30:18 -0500

Seen: 23 times

Last updated: Sep 16