极端风况下双转子风力机降载复合控制策略

为降低双转子风力机在极端风况下的大波动载荷，基于双转子风力机气动与控制仿真系统，提出了基于独立变桨自抗扰控制器和偏航模糊控制器的降载复合控制策略，并分析了正常风况和极端风况下该策略的控制效果。结果表明：与传统PID独立变桨控制相比，在极端运行阵风和极端湍流模型下，独立变桨自抗扰控制方法使叶根挥舞弯矩标准差减小18%以上；与传统恒速偏航控制相比，在极端风向变化下，偏航模糊控制方法使偏航轴承滚动力矩标准差减小约27%。降载复合控制策略有效降低了极端风况下双转子风力机的大载荷，抑制了功率波动。

A Compound Control Strategy for Load Alleviation of a Dual-rotor Wind Turbine under Extreme Wind Conditions

In order to reduce the large fluctuating load of the dual rotor wind turbine under extreme wind conditions, based on the aerodynamic and control simulation system of the dual rotor wind turbine, a compound control strategy for load alleviation based on independent variable pitch auto disturbance rejection controller and yaw fuzzy controller was proposed, and the control effects of this strategy under normal and extreme wind conditions were analyzed. The results show that compared with the traditional PID independent variable pitch control, the standard deviation of blade root flapwise moment is reduced by more than 18% by the independent variable pitch auto disturbance rejection control method under the extreme operating gust and extreme turbulence model; compared with the traditional constant speed yaw control, the yaw fuzzy control method reduces the standard deviation of yaw bearing roll moment by about 27% under the extreme wind direction change. The compound control strategy for load alleviation effectively reduces the large load of the dual rotor wind turbine under extreme wind conditions and suppresses the power fluctuation.