Abstract

The present study presented a direct power control (DPC) for the rotor side converter (RSC) of doubly-fed induction generator (DFIG) connected to the wind energy conversion system, as an alternative to classical vector control (FOC). In this paper, a simple but effective DPC was proposed to achieve quick response with acceptable steady state performance using the conventional switching table to select the appropriate voltage vectors to the rotor side converter (RSC). In addition, in order to control grid-side converter (GSC) system, a conventional direct power control (DPC) strategy was compared with fuzzy direct power control (F-DPC) for controlling active and reactive power flow exchanged with a grid. Simulation results on a 2 MW DFIG system using MAT-LAB/Simulink were presented to show effectiveness and robustness of the proposed control strategy during variations of active and reactive power, rotor speed, and converter dc link voltage.