复杂地形对风速廓线的影响

Effects of Complex Terrain on the Wind Speed Profile

随着风电利用的发展,越来越多的风电场建立在复杂地形的山区,为了更好地进行风能评估和风电预报,就需要了解复杂地形对风速廓线的影响。本文基于薄翼理论和湍流边界层扰动的线性化理论,采用两层模型对坡度较小的山地在其二维横截面上的风廓线进行了预测,该模型能够较为准确地预报地形、压力、稳定度对风速增速的影响,但对于三维地形或其他因素产生的风速的复杂变化,需要进一步将其扩展至三维,并结合数值模拟进行研究。

With the development of wind power utilization systems,an increasing number of wind farms are built in complex terrains such as mountainous areas.For better wind energy assessment and wind power forecast,understanding the impacts of complex terrains on the wind speed profile is necessary.Based on the thin airfoil theory and the linearization theory of the disturbance of the turbulent boundary layer,this paper predicts the wind speed profile in the two-dimensional cross section using a two-layer model.The model can accurately predict the influences of terrain,pressure,and stability on wind speed.However,for three-dimensional terrains or other factors,the model needs to be further extended to three dimensions and combined with numerical simulations.