Direct active and reactive power control of DFIG based wind energy conversion system

This paper presents 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 the classical vector control (FOC). In this work a simple but effective DPC is proposed to achieve quick response and acceptable steady state performance at reason of using a conventional switching table to select the appropriate voltage vectors to the Rotor Side Converter (RSC). Furthermore for controlling Grid-Side Converter (GSC) system a conventional Direct Power Control (DPC) strategy will be compared with Fuzzy Direct Power Control (F-DPC) for controlling Active and reactive power flow exchanged with grid. Simulation results on a 2 MW DFIG system using MAT-LAB/Simulink are provided to demonstrate the effectiveness and robustness of the proposed control strategy during variations of active and reactive power, rotor speed, and converter dc link voltage.