摘要
通过对华南地区27个测风塔为期1年的铁塔观测资料进行分析,发现平均风功率密度指数值均小于3倍的平均风速指数值,利用平均风速和形状参数随高度的变化的经验公式,推导出由10m风速资料推算风机可能的轮毂高度的平均风功率密度的新方法,应用该方法对现有铁塔资料进行交互拟合分析,其平均相对误差9.6%,可为无梯度测风观测站点由10m高度风速的频率分布推算风机可能的轮毂高度平均风功率密度提供参考。
Based on the data from 27 meteorological observing towers over South China for one year,it is found that the average wind power density index is less than the three-fold wind speed index.The variation law between annual mean wind and shape parameter with height and a new method for estimating the average wind energy density at different heights are discussed.The results show that the average relative error of this method is 9.6%,which provides references for computing the wind power density so to estimate the variation of wind energy with height for the stations without gradient wind observation.
出处
《气象科技》
2012年第4期680-684,共5页
Meteorological Science and Technology
关键词
风功率密度
指数律
风资源评估
形状参数
wind power density
index law
wind resource assessment
shape parameter
