Sliding mode SVM-DPC for grid-side converter of D-PMSG under asymmetrical faults

This paper presents a new direct power control algorithm based on space vector modulation using sliding mode controller. For this algorithm, it introduces sliding mode controller to regulate the dc voltage, active and reactive power, and it is unnecessary to decompose the voltage and current into positive and negative sequence components, so its amount of calculation is greatly reduced. According to the simulation results, the proposed algorithm in this paper can achieve the smooth sine of input current at the grid-side converter of wind turbine under asymmetrical fault, which ensures the stable DC voltage and enhances the fairly good capability of fault ride-through for wind turbines under asymmetrical fault.