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为便于进行海上风能资源评估与利用,采用三参数Weibull分布来描述风的统计特性是必要的。根据Weibull分布的三参数与概率权重矩(probability-weighted moment,PWM)的关系,应用罗吉斯蒂曲线拟合形状参数与PWM的函数关系,提出低阶不及PWM和超过PWM 2种参数估计方法。精度检验显示,文中方法在较大范围内均具有较高的精度。通过算例分析比较,认为提出的低阶PWM法值得推广使用。
To facilitate the assessment and utilization of offshore wind energy resources, it is necessary to describe the statistical characteristics of the wind using the three-parameter Weibull distribution. According to the relationship between the three parameters of Weibull distribution and the probability-weighted moment (PWM), the relationship between the shape parameters and the PWM function is fitted by using the Rogues curve. . Accuracy tests show that the method in the text has a higher accuracy in a large area. Through the example analysis and comparison, the proposed low-order PWM method is worth promoting.