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I'm doing dynamic simulation with offshore wind modeled as WT4G1 and WT4E1 connected to the ac system via VSC HVdc Light Model. During 6-cycle fault and after fault clearing with tripping, network not converged is displayed.

So far I've tried several turnarounds: increased iteration limits, used 1/8th of a cycle as time step, reduced acceleration factor to 0.1 and reduced fault MVA. Note that the location of fault is two bus away from the converter side in the ac system.

I would like to see suggestions in this group in order to help me fix the problem. Thanks.