DFIG-Based Wind Turbine Control Using High-Gain Observer

This article deals with the power generation control in variable speed wind turbines. In this context, a control strategy is proposed to ensure power extraction optimization of a DFIG-based wind turbine. The proposed control strategy combines an MPPT using a high gain observer and second-order sliding mode for the DFIG control. This strategy presents control to the uncertainties of DFIG modeling, which maximizes efficiency of energy production. This strategy is been validated on a 1.5 Mw wind turbine using the simulator Matlab-simulink. For step and random wind speed profile, we get perfect convergence of the electromagnetic torque and cancellation of the reactive power to the stator. The unit cos φ and the rate of distortion obtained improves the quality of the currents generated on the Grid and optimizes the efficiency of the conversion chain.