为了研究某风场的风速分布特性及其随高度的变化规律,将威布尔分布和最大熵原理应用于两个测风塔的年风速频率分布拟合中.研究表明,在同一高度上威布尔分布的频率峰值低于实测频率最大值,最大熵分布的频率峰值则与实测非常接近;在不同高度上,随高度的增加,最大熵原理表现出更为明显的优势.从平均有效风能密度来说,五参数最大熵分布计算的误差均值为1.71 W/m2,而威布尔分布的误差均值为7.48 W/m2.%In order to study wind speed distribution characteristics and its variation with height in a wind field,the Weibull distribution and Maximum Entropy principle are applied to the fitting of annual wind speed frequency distribution of two wind towers.The results show that:(a) at the same height,the frequency peak value of Weibull distribution is lower than measured maximum frequency and the frequency peak value of Maximum Entropy principle is very close to measured value;and (b) at different heights,the Maximum Entropy principle shows a more obvious advantage with the increase of height.Furthermore,the mean errors of average effective wind power density calculated from five-parameter Maximum Entropy distribution and from Weibull distribution are 1.71 W/m2 and 7.48 W/m2 respectively.
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