Dynamic performance optimization for high-power density three-phase Vienna PFC rectifier

This paper presents one dynamic regulation of controller parameters strategy for power factor correction (PFC) rectifier, which is based three-phase Vienna topology. To improve the converter power-density, the operation with high frequency and fast calculation is required. In this paper, the proposed controller is based on digitized feedforward compensation approach, can improve the control system dynamic response and simplify the algorithm. In addition, by adjusting the error coefficient of positive and negative dc-link ensures quickly maintaining the neutral point voltage balance under lightly or no load conditions. The theoretical analysis of the proposed strategy is deduced, and, the controller parameters design method is given. Finally, the simulation and experimental results are obtained by using a digitally controlled Vienna rectifier, which validates the proposed method.