Backstepping control of double fed induction generator driven by wind turbine

Abstract

This paper presents the nonlinear control strategy for high performance doubly fed induction generator driven by wind turbine. In the DFIG topology the stator is connected direct to the grid while the rotor is connected to a back-to-back converter. A simple and general space vector PWM algorithm is proposed. First, we propose a modeling of wind turbine and DFIG in the dq reference frame. Next, a field oriented control for controlling independently the active and reactive power is implemented. This control strategy is developed and tested by synthesizing two types of controllers: a classic controller Proportional and Integral (PI) and a non linear type controller backstepping. Their performances are evaluated and compared in terms of power set point tracking, sensitivity to disturbance, robustness with respect to sudden changes in speed and robustness with respect to parameters variation.