CALMET模式不同参数化方案对江西省山地风场模拟的对比分析

Effects of Parameterization Schemes in the CALMET Model on Numerical Simulation of Wind Speed at the Mountain Wind Power Station of Jiangxi Province

通过降尺度模式CALMET不同参数化方案对江西山地风场测风塔风速风向模拟结果的对比分析,选取出适合山地风场模拟的最优参数化方案,并进行连续一年的模拟效果检验。结果表明:CALMET模式以不采用地形动力效应参数调整和Froude数调整,采用下坡气流效应调整和O’Brien垂直风速调整时,对江西省境内山地风场50 m以上高度层风场模拟效果最佳。最优参数化方案不仅能较好地模拟出山地风场测风塔逐时风速,并且对全年风速段分布模拟有较好的结果。CALMET模式能模拟出实际测风塔全年主导风向,但模拟与实测结果主导风向分布约有一个方位的偏差,主导风向频率有7%~8%的偏差。

Through the different parameterization schemes of the CALMET model,results of simulated wind speed and wind direction of Jiangxi mountain wind field are compared.The results show that the optimal parameters of the fifth set of parameters,namely the CALMET model,are not suitable for detecting kinematic terrain effects.Adjustment of slope flows has smaller effect on wind field above 50 m level.The adjustment of mountain wind field without Froude number and adoption of the O’Brien method can improve the simulation of wind speed at the mountain wind power station.The optimal parameter scheme not only simulates well the trend of high mountain wind power station wind speed,but also produces good results for the simulated distribution of the wind speed segment throughout the year.The CALMET model can effectively simulate the actual wind direction of the actual wind tower,but there is about one azimuth and 7%-8%deviation between the simulated and measured wind direction distribution and dominant wind direction,respectively.