Model Reference Adaptive Pitch Angle Controller Of Variable-Speed Wind Turbine

In this paper, a pitch angle controller is designed based on adaptive control theory to guarantee steady generator power output while reducing the mechanical loads at above rated wind speed. A non-affine model of the pitch regulated variable-speed wind turbine is built to formulate complicated aerodynamics. The adaptive pitch angle controller assures wind energy conversion system of uniformly bounded transient response in the presence of rapidly changing wind speed, in addition to stable generator angle speed. Without the loss of system robustness, we can improve the performance bounds of adaptive controller by increasing the adaptation rate. Simulation results on GH Bladed software package show that more steady operating output power is obtained by the adaptive controller compared to the traditional pitch angle controller adopted in industry.