Performance evaluation of backstepping approach for wind power generation system-based permanent magnet synchronous generator and operating under non-ideal grid voltages

Abstract

This paper presents a nonlinear control strategy to track the maximum power point for 4 MW-WFS based on Permanent Magnet Synchronous Generator (PMSG) and interconnected to the electrical network. The control schemes are based on nonlinear Backstepping theory to control both PMSG and grid-side converters of a WFS. The main objective of this control is to regulate the velocities of the PMSGs with Maximum Power Point Tracking (MPPT). Besides, the grid-side converter is used to control the dc link voltage and to regulate the power factor at varying wind velocity. The stability of the regulators is obtained using Lyapunov analysis. The simulation results through MATLAB/Simulink are presented and discussed to demonstrate the validity and efficiency of the proposed methodology. Finally, a comparison of results based on the proposed Backstepping approach and conventional Proportional Integral (PI) regulator is provided for different grid voltage conditions and under parameter deviations.