基于风剪切的风力发电机组独立变桨控制

Independent pitch control of wind turbine based on wind shear

目前风力发电机逐步大型化，塔架越来越高，结构尺寸越来越大，风剪切对风力发电机组的影响也越来越大。为改善风剪切对风力发电机零部件和发电功率的影响，提出基于线性二次调节（LQR）的独立变桨控制策略，利用FAST和MATLAB7．1／Simulink进行联合仿真，对仿真结果与统一变桨控制策略的结果进行了分析。分析结果表明：通过独立变桨控制，能够减小风力发电机的输出功率波动及主要零部件的疲劳载荷，进而能够有效地延长设备的使用寿命。

With the development of wind turbines, the tower becomes more higher, and structure size is larger, the effect of wind shear on wind turbines is also increased. To reduce the influence of wind shear on the wind turbine components and power generation, an independent pitch control strategy based on linear quadratic regulator （LQR） is proposed, and the joint simula- tion with FAST and MATLAB 7.1/Simulink is completed, results of simulation and unified pitch control strategy is analyzed. Analysis results show that the independent pitch control can reduce the output power fluctuations of wind turbines and fatigue loads of main components, then the working life of the equipment can effectively increase.