Disturbance Accommodating LQR Method Based Pitch Control Strategy for Wind Turbines

A disturbance accommodating Linear Quadratic Regulator (LQR) method was applied in pitch control system to achieve good performance. The disturbance can be estimate by designing state estimator, and a feedback was added into the input to eliminate disturbance effect. The feed back matrix was calculated in accordance to LQR theory. A wind turbine dynamic modal was set up, and simulation of the control system was preformed based on Matlab7.1/simulink. The simulation results show that the controller ensure pitch control actuator little fatigue, and has smaller overshoot. The proposed method is has better performance and easy to realize.