WRF模式不同边界层参数对西南地区风资源模拟

Effect of Different Planetary Boundary Layer Parameterization Schemes on Near-surface Wind Speed in Southwest China Based on the WRF Model

为了保证风电发动机经济的运行,在建设前对该地区进行风资源评估是必要的。本文采用WRF模式中16中不同边界场与近地面层组合方案对我国西南地区进行了动力降尺度模拟,主要对比分析了不同边界场参数对西南地区近地面风风速的影响,评估较优参数方案对西南地区风资源模拟的效果,为今后风电场建设决策提供依据与建设后能否持续发电提供参考。结果表明:西南地区整体风资源位于西部山区盆地边缘,东部平原盆地中心风资源较少;WRF模式整体低风速模式值偏大、高风速模式值偏小,更高的分辨率对于西南地区地面风速模拟并无较大优化,但高分辨率下风速模拟值也有所增大;地理空间上四川盆地内风速模拟效果较好,平均偏差-0.4m/s,盆地边缘与山区表现较差;ACM2和YSU方案对川渝地区近地面风速有更好的描述效果。

In order to ensure the economical operation of wind turbines,it is necessary to conduct a wind resource assessment in the area before construction.In this paper,16 different combinations of boundary fields and near-surface layers in the WRF model are used to carry out dynamic downscaling simulations in Southwest my country,mainly to compare and analyze the effects of different boundary field parameters on the wind speed near the surface in Southwest China,and to evaluate the optimal parameter scheme.The effect of wind resource simulation in the southwest region provides a basis for future wind farm construction decisions and a reference for sustainable power generation after construction.The results show that:the overall wind resource in the southwest is located at the edge of the western mountainous basin,and the wind resource in the center of the eastern plain basin is less;the overall low wind speed model value of the WRF model is larger,and the high wind speed model value is smaller,and higher resolution is related to the surface wind speed in the southwest region.The simulation has not been greatly optimized,but the wind speed simulation value has also increased at high resolution;the wind speed simulation effect in the Sichuan Basin is good in geographical space,with an average deviation of-0.4m/s,and the performance of the basin edge and mountainous area is poor;ACM2 and The YSU scheme has a better description effect on the near-surface wind speed in the Sichuan-Chongqing region.