Three-phase dc-ac power converters suffer from power oscillation and over current problems in case of the unbalanced ac source voltage that can be caused by grid/generator faults. Existing solutions to handle these problems are properly selecting and contr negative-sequence currents. In this paper, a new series of control strategies which utilize the zero sequence components are proposed to enhance the power controllability under this adverse condition. It is concluded that by introd

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... ng circuit configurations, the power converter can enable more flexible control targets, achieving better performances in the delivered power and the load current when suffering from the unbalanced voltage.