分时段及分方向风切变分析在风能资源评估中的应用

Diurnal and Directional Wind Shear Analysis in Wind Resource Assessment

通过计算整体风切变指数、分时间段及分方向风切变指数,进而推求高层的风速及风能指标,并与实测数据进行对比。经实例分析,对于风切变日变化较为明显的测风塔,采取分时段推求所得的数据最优;对于风切变方向变化较为明显的测风塔,采取分方向推求所得的数据最接近真实情况。

The wind speed and wind resource index in high level is extrapolated based on the calculation of wind shear exponents in different time of a day and different directions separately and overall wind shear exponent in lower levels, and then the results are compared with actual measuring data. The case study results show that, （ a） if the wind shear of wind masts changes significantly in a day, the wind data extrapolated by times is the best;and （b） if the wind shear of wind masts changes significantly by direction, the wind data extrapolated by directions is closest to true data.