NONLINEAR PREDICTIVE CONTROL OF WIND ENERGY CONVERSION SYSTEM USING DFIG WITH AERODYNAMIC TORQUE OBSERVER

In order to improvement, of the performances for wind energy conversions systems an advanced control techniques must be used. In this paper, as an alternative to conventional PI-type control methods ar predictive control (NPC) approach is deN-eloped for DFIG-based wind turbine. To enhance the robustness of the controller, a disturbance observer is designed to estimate the aerodynamic torque which is coDSidered as an unknown perturbation. An explicit ly analytical for in of the opt imal predictive conixoller is given consequently optirriization is not necessary The DFIG is fed through the rotor windings by a back-to-back converter controlled by Pulse Width Modulation (PWM), where the stator winding is directly connected to the grid. The presented simulation results show a good performance in trajectory tracking of the proposed strategy and rejection of dist urbances is successfully achieved.