河南省东部平原区风切变特性分析

Analysis of Wind Shear Characteristics in East Henan Plain

利用河南省东部平原区30座120m(100m)高度测风塔一年以上的风观测数据,研究了河南省东部平原区风切变特征,结果表明:近地层风速随高度变化基本遵循幂指数规律;各塔年风切变指数为0.270~0.522,平均值为0.365,主要受底层地貌环境影响,个体差异较大。80m高度以上风切变指数没有明显的空间分布规律,30座测风塔的年风切变指数为0.217~0.383,平均值为0.323。总体上该地区风切变指数较大,适合安装高轮毂风电机组。

Wind shear characteristics in east Henan plain have been analyzed based on the wind observation data collected from 30 anemometer towers ranging from 100 to 120 m in height. The result indicates that: the near ground wind velocity has a power-exponential dependence on the height;the annual wind shear exponents of each anemometer tower vary from 0.270 ~ 0.522, with a mean value of 0.365, which is mainly impacted by the surface geomorphic environment;the wind shear exponents display no apparent distribution rule along the height when the anemometer towers exceeding 80m, where the wind shear exponents vary from 0.217 ~ 0.383, with a mean value of 0.323. Generally, the wind shear exponents in this area are relatively great, suggesting it is more suitable to install high hub wheel turbine there.