降尺度参数方案优化在风资源评估中的应用

Wind Resource Assessment Based on Downscaling Parameter Optimization Method

本文提出了一种适用于风资源评估的中尺度数据降尺度最优方案参数选择方法,重点分析了中尺度数据源、中尺度数据高度以及CFD模拟的大气稳定度,对中尺度数据降尺度计算精度的影响。结合山东冠县7座测风塔实测数据,以5座测风塔数据优化中尺度降尺度参数配置方案,以2座测风塔数据进行复核验证。结果表明,在类似山东冠县的平坦地形上,中尺度数据源和中尺度数据高度对降尺度计算精度影响相对较大;在此基础上,适宜的大气稳定度参数将进一步提升计算精度。

This paper presents a downscaling parameter optimization method which is suitable for wind resource assessment.The adjustable parameters in this study are:mesoscale data source,mesoscale data height and atmospheric stability of CFD simulation.Based on the comparison between the measured data of five wind masts which are outside the core area of Guanxian in Shandong Province,we determined the optimal downscaling configuration for this area.Furthermore,we also applied the obtained optimal downscale configuration and extrapolate the mesoscale data to two wind mast located in core area to verify the availability of our method..The results show that the calculation accuracy is greatly affected by mesoscale data source and mesoscale data height.On this base,the calculation accuracy is further improved by the suitable atmospheric stability of CFD simulation.