Performance analysis of DPC for grid side converter dedicated to wind energy conversion system-based DFIG

This paper investigates and studies the use of direct power control (DPC) approach for controlling three-phase AC/DC converter included in a wind conversion system based doubly fed induction generator (DFIG). Instantaneous active and reactive powers are directly controlled by selecting the optimum state of the converter. The DC-bus voltage is maintained at the required level by imposing the active power to be constant and equal to its reference value. The unity power factor (UPF) operation of the converter is achieved by maintaining the reactive power zero during all sectors. Simulation results highlight the performances as well as the lacks of such a strategy.