Improved pitch angle control for variable-speed wind turbine system

Abstract

In this paper, a pitch angle control scheme based on the fuzzy logic is proposed for the variable-speed wind turbine systems. The generator output power and rotor speed are used as control input variables for the fuzzy logic controller (FLC), which are effective to compensate for the nonlinear characteristic of the pitch angle to the wind speed. Also, a speed sensorless technique estimating the rotational speed is employed for the proposed control method. The effectiveness of the proposed method is verified by MATLAB simulation results for a 2-MW PMSG wind turbine system. © Springer-Verlag Berlin Heidelberg 2014.