Control of PMSG WECS Based on DTC and Backstepping Algorithm

Abstract

This work presents a control strategy for wind power generation system based on PMSG, which consists of employing Direct Torque Control (DTC) and Backstepping algorithm. So, a control scheme for the back-to-back converter is provided. Under speed variation of wind, the regulators for grid side and PMSG side converters work simultaneously. The inverter is controlled to preserve a stable dc link voltage, but the rectifiers are controlled to guarantees Maximum Power Point Tracking (MPPT) in a wind system. Also, with Lyapunov analysis, the controller stability is assured. The simulation results show that the presented control approaches are accurate under the platform Matlab/Simulink.