摘要
针对风力发电机组在叶根处摆振力矩、挥舞力矩的极限载荷外推方法问题,以某3 MW风力发电机组为原型。采用改进冯·卡门谱进行550个3D湍流风模拟,从而减小了由湍流风造成的误差。引入过峰值阈值法,减少非重要载荷极值。利用两种拟合方法分别对两种典型概率分布进行分析对比,研究表明三参数威布尔分布下的最大似然估计法最适合计算极限外推载荷,且相对于其他3种方法更具有广泛性。
Based on the research edgewise and flapwise blade root bending moment extreme load extrapolation method of wind turbines. The use of wind turbines of 3 MW as the prototype.Improved von Karman spectrum for 550 3D turbulent wind simulation, Effectively reducing the error caused by the turbulent wind. The introduction of the peak over threshold method, Effectively reduce the extreme load. And use these these two methods for two typical probability distribution and comparison, respectively. Research showed that the most suitable in the calculation of the extreme load extrapolation method is three parameters Weibull distribution of maximum likelihood estimation method and more extensive relative to the other three methods.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2014年第11期2320-2326,共7页
Acta Energiae Solaris Sinica
关键词
极限载荷外推方法
改进冯·卡门谱
过峰值阈值法
双参数耿贝尔
三参数威布尔
the extreme load extrapolation methods
improve the von Karman spectrum
over the peak threshold method
twoparameter Gumbel
three-parameter Weibull
