中文摘要：

为限制大型风力发电机组在高风速时的功率输出和风力机气动载荷，首先，采用PID控制，设计独立变桨距功率和扭矩外环控制；其次，引入不依赖于系统数学模型的无模型控制，设计桨叶挥舞弯矩内环控制；最后，以外环控制输出桨距角为参考量，内环无模型控制期望桨距角为反馈量，利用PID控制，给出3个桨叶桨距角最终参考值。利用Matlab／Simulink仿真软件，搭建了3MW风电机组仿真平台，仿真结果表明，所设计的独立变桨距多目标控制，能够完成在高风速时保持风力机组输出功率恒定、平衡3个桨叶所受扭矩以及兼顾3个桨叶所受挥舞弯矩的多目标控制任务。

英文摘要：

When wind speed reaches or exceeds the rated wind speed, wind turbine power output andaerodynamic loads must be limited. First of all, traditional PID control is used to design an outer loopcontrol for shaft torque and power; Secondly, model free control is introduced to design an inner loopcontrol for waving moment; Finally, the pitch angle of outer loop control output is used as the refer-ence, the pitch angle of inner loop control object is used as the feedback, a PID controller outputs threeblade pitch angle values. 3MW wind turbine simulation platform is built in simulation software Matlab /Simulink, the simulation results show that the independent variable pitch multi-objective control canperform multi-objective task, which maintains a constant output power for wind turbine at a high windspeed, balances three blades suffered torque and three blades suffered waving moments.