Research About Large Wind Turbine's Control Strategy

Any wind turbines need power control. We aim at capturing wind energy in below-rated wind speed as much as possible and limiting the aerodynamic power in above-rated wind speed. The power control can be achieved by blade pitch control. Pitch control includes passive stall and active stall .The article studies the control strategy of active stall MW wind turbine. First, wind turbine' dynamic is constructed and open loop model is made. Three methods are adopted to design closed loop controllers: PI controller, linear quadratic optimum controller, adaptive controller,. PI controller is traditional controller. Optimum control is applied to design closed loop controller in accordance with contradictory demands of many performance index, Considering the variation of operation condition, adaptive control is put forward.. Computer simulation are all made for above three controllers.