大型风电场群风电场布局间距的模型研究

Model Study on the Optimal Interval Distance among Wind Farms in Large-Scale Wind Farm Group

利用边界层理论和梯度输送原理,依据动量守恒定律,在大气中性层结条件下建立了风电场的动量吸收模型和风电场下游的动量补偿模型,计算出风电场尾流距离。参照实际风电场布局规模和风机几何参数设计数值试验,并对尾流距离与这些参量之间的关系进行了初步分析。结果表明,风电场尾流距离随风机直径、风塔高度、风机行数和风机动能利用系数的增加而增大,随地表粗糙度和风机列间距的增加而减小,并且这一距离不受风速和风机列数的影响。

Based on the boundary layer theory,the gradient transfer principle and the atmospheric neutral stratification,the momentum absorption and downstream compensation models in wind farms are established on the law of conservation of momentum,and the wake distance from wind farm is calculated.Numerical experiments based on the size of the actual wind farm layout and turbine geometry parameters are designed.The relationship between wake distance and these variables is preliminary analyzed.The results show that the wake distance increases with the diameter of turbine,tower height,rows of turbine and kinetic energy utilization factor,while decreases with the surface roughness and the space between columns,and it has no influence from wind speed and columns of turbine.