降低风力机叶轮载荷独立变桨距控制策略  

Individual pitch control for decreasing wind turbines of rotor load

作　　者：闫学勤[1] 王维庆[1,2] 王海云[1,2] Yan Xueqin;Wang Weiqing;Wang Haiyun(College of Electrical Engineering,Xinjiang University,Urumqi 830047,China;Engineering Research Center for Energy Generation & Grid of Ministry of Education,Urumqi 830047,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047 [2]教育部可再生能源发电与并网控制工程技术研究中心,新疆乌鲁木齐830047

出　　处：《可再生能源》2019年第8期1241-1246,共6页Renewable Energy Resources

基　　金：国家自然科学基金资助项目(51667020);新疆维吾尔自治区重点实验室资助项目(2016D0321);新疆维吾尔自治区重大项目(XJEDU2017I002)

摘　　要：为了减小风力机叶轮的气动载荷,文章提出了将叶片方位角权系数分配与叶片根部气动载荷反馈相结合的独立变桨距控制方法(AAWC-LF)。控制器依据方位角的大小不同,利用权系数分配器重新分配每个叶片桨距角的调整变化量。同时,考虑到现场实际风速会突然大幅变化,在基于方位角权系数分配的独立变桨距控制基础上,增加了基于叶片根部实际气动载荷的桨距角修正环节。通过对比仿真曲线和实验结果,发现该算法增加了桨距角的调整次数,同时减小了叶轮所承受的气动载荷,对机组的输出有功功率没有形成冲击,叶轮转速更加平稳,控制效果较理想。To mitigate aerodynamic load of wind turbine rotor,the individual pitch control strategy of wind turbines based on azimuth angle weight number assignment and aerodynamic load feedback of the blade root was proposed in this paper.According to the different azimuth angle,the controller would adjust the pitch angle of each blade by weight number assignment.On this basis,it is considered that the actual wind speed in the field would suddenly change dramatically,the correction link of pitch angle was superimposed based on aerodynamic load feedback of the blade root.The simulation and experiment results proved that the individual pitch control strategy of wind turbines with the above control strategy can not only reduce the root loads,but also has less impact on the active power output of unit although increasing the adjustment times of the pitch angle.Therefore,it is helpful to improve the safe operation of the wind turbine and prolong the service life of the wind turbine.

关 键 词：风力发电机组 方位角 载荷抑制 独立变桨控制 载荷反馈 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]