A robust Nonlinear Controller Approach of a Wind Energy Conversion System Based on a DFIG

Abstract

This research document deals with the synthesis of a nonlinear control law for a doubly fed induction generator (DFIG), which aims at improving its performances, robustness, and stability. Several commands have been proposed in literature, among them, the adaptive nonlinear backstepping command based on Lyapunov function. The purpose of this command is to control the electromagnetic torque of the generator while maintaining a reactive stator power equal to zero. This command permits the extraction of the maximum power point, despite wind speed variations. In order to validate the theoretical results, the corresponding algorithm is implemented in MATLAB/SIMULINK simulation environment. The results analysis shows the characteristic robustness of the DFIG using the proposed controller.