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mohamed_gabr

the reference negative sequence current is zero however the output current is not zero

Dear sir

I am working on integrating three-phase inverter to grid with unbalanced voltage due to faults. The positive and negative sequence is extracted using DDSRF. It is required to share a balanced current during faults so the inner control loop looks like the attached figure with i dref =i qref =0.

However, the output current isn’t balanced during the fault period.

So what do you think about this problem?

Status: Open Aug 24, 2020 - 06:01 AM

inverter 3 phase, unbalance system, Fault Ride Through, DDSRF

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Tamer Mellik

Aug 26, 2020 - 11:01 AM

Hi Mohamed,
I did not see any replies to your question. It is hard to investigate the issue without reviewing your model. If you can share your model, it might be helpful to the forum users to review.
Best of luck!

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