重庆市山地地区近地层风切变研究

Research of Surface Layer Wind Shear in Mountainous Areas of Chongqing

为分析重庆山地地区近地层风切变指数的特征,利用重庆市7座80~90m完整年测风塔实测数据,研究7座测风塔风切变指数时间和空间的变化特征。结果表明7座测风塔实测风切变指数差异较大,变化范围为0.04~0.34,相比1/7(约0.143)的参考值,实测风切变指数误差幅度最高达137%。该结论可用于重庆山地地区近地层风切变指数的模拟及风速推算,以提高该地区分散式风电项目开发选址和风能资源评估的科学性。

In order to analyze the characteristics of surface layer wind shear in mountainous areas of Chongqing,the paper uses the measured datas from 7 complete annual wind towers of 80~90m in Chongqing and researchs mainly on the temporal and spatial variation characteristics.The results show that the measured wind shear index of 7 wind towers varies greatly,and the variation range is 0.04-0.34.Compared with the measured wind shear index,the maximum error range of the reference value of 1/7(about 0.143)is 137%.The conclusion can be used to simulate the surface layer wind shear and calculate the wind speed in the mountainous area of Chongqing,so as to improve the scientificity of the decentraized wind power projects and the evaluation of wind energy resources in this area.