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为解决平均风速和最大风速法在风速分布估计中误差较大、精度不高的问题,在现有的平均风速和最大风速法的基础上,将其估计的时间段划为若干小段,采用平均风速和最大风速法对每小段进行估计后,对每小段中的平均风速和形状参数用正交多项式作最小二乘曲线拟合,得到了更具代表意义的Weibull分布形状参数,从而得出了高精度的风速分布。实验结果表明,该方法涉及的参数量少,运算速度快,有利于提高风电场风能评估效率。
In order to solve the problem that the average wind speed and the maximum wind speed method have larger errors and lower precision in estimating the wind speed distribution, based on the existing average wind speed and maximum wind speed method, the estimated time period is divided into several small sections, Wind speed and maximum wind speed method to estimate each small section, the average wind speed and shape parameters in each section are orthogonal polynomials for least square curve fitting, Weibull distribution shape parameters are more representative, which leads to the High-precision wind speed distribution. The experimental results show that this method involves less parameters and fast calculation speed, which is beneficial to improve wind energy evaluation efficiency.