利用10m高度风速推算风机轮毂高度平均风功率密度  

Using 10 m Wind Speed to Calculate Average Wind Power Density at Wheel Height of Wind Turbines

作　　者：王志春[1] 丁凌云[2] 黄天宋 植石群[1] 

机构地区：[1]广东省气候中心,广州510080 [2]中山大学化学与化学工程学院,广州510275 [3]广东省惠来县气象局,惠来515200

出　　处：《气象科技》2012年第4期680-684,共5页Meteorological Science and Technology

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.

关 键 词：风功率密度 指数律 风资源评估 形状参数 

分 类 号：P412.16[天文地球—大气科学及气象学]