Direct power control of a doubly fed induction generator dedicated to wind energy conversions

The aim of this work is the study and the modeling of a variable speed chain of wind conversion based on a doubly fed induction generator (DFIG) coupled to the distribution network and controlled by direct power control (DPC), through a power converter in the rotor side. After modeling the whole system, this paper presents the Maximum Power Point Tracking (MPPT) control method of DFIG-based variable-speed wind energy conversion system. Then, the modeling of DFIG for control has been studied and has been devoted to the synthesis of the DPC control. In fact, this strategy is based on selecting of the appropriate rotor voltage vectors, according to requirements of stator active and reactive powers. Simulation results show the performances and the failures of such control strategy.