水平轴风力机变桨载荷分析与计算

Analysis and calculation of variable pitch load for horizontal axis wind turbine

针对风力机变桨载荷常规计算时忽略很多细节从而导致数值不精确的问题,文中以大型水平轴风力机为研究对象,通过数值计算软件Matlab/Simulink,在建立风电机组非线性模型基础上,对风力机桨叶外形参数和空气动力数据进行分析和计算,得到风力机桨叶轴向诱导因子、周向诱导因子、入流角、攻角、相对风速、桨距角等参数对应不同风速的值,最终根据这些参数,综合分析计算,得到了风力机变桨载荷的数值.计算结果为风力机变桨控制系统分析和设计提供了更为可靠的基础性数据.

To solve the problem that inaccurate value is obtained due to neglect of details in conventional variable pitch load calculation,a horizontal axis wind turbine is taken as the investigation subject.The nonlinear model of wind power system is established and the blade geometry parameter and the aerodynamic data are calculated by using Matlab/Simulink.Some parameter values corresponding to different wind speed,such as axial induced factor,circumferential induced factor,relative wind speed,inflow angle,attack angle and pitch angle are calculated.In the end,the value of the variable pitch load is obtained according to the above data.The calculated results provide the reliable and fundamental data for the design of the variable pitch control system of the wind turbine.