Improved Direct Power Control of DFIG Wind Turbine by using a Fuzzy Logic Controller

Abstract

This paper proposes a novel scheme for direct power control (DPC) of doubly-fed induction generator (DFIG) in wind power applications. In this scheme, a fuzzy logic controller is used for adjusting the bandwidth of active power hysteresis controller in DPC method in order to reduce the active power ripples and improve dynamic response of the generator. Also, in this paper a simpler method is used for determination of the sector number that lowers the burden of the system. Moreover, the rotor position sensor is eliminated and a MRAS observer is used for estimation of the rotor position. Simulation results by using MATLAB/Simulink presented for a 2MW DFIG system proves the effectiveness of the proposed control method.