风电场动态分析中风速模型的建立及应用

考虑风电场内机组间尾流效应的风速模型能较准确地描述风速扰动下风电场输出功率的波动，使研究结果更具有实际意义和价值。该文分析了风力机背面风速的计算方法，提出应用风电场及场内风电机组通常可得到的数据，根据在某风向上游风力机对下游风力机的遮挡及遮挡面积的不同，建立考虑机组尾流效应的风速模型，此方法适合于由任何台数风电机组组成的大型风电场风速建模。将输出风速与电力系统分析程序，DIgSILENT/PowerFactory相连，形成了以风速为基础的风电场与电力系统相互影响研究的计算程序，分析了尾流效应对风电场输出特性的影响。

Establish and Application of Wind Speed Model in Wind Farm Dynamic Analysis

The wind speed model considering wake effect can describe power output of wind farm more accurately under wind speed fluctuation, therefore the study result is more practical. This paper sets up the wind speed model considering wake effect only using the available parameters and data of wind farm and turbines within the park according to the shadow of the upstream wind turbines to the downstream turbines and variable shadow size at some wind direction after analyzing calculation method of leeside wind speed of wind turbine. The method of modeling wind speed is suitable for wind farms including any number of turbines. The programme to study the interaction between wind farm and power system based on wind speed has been established through integrating the output of wind speed from wind speed model into DIgSILENT/ PowerFactory. The results illustrating the impact of wake effect on wind farm output behavior are presented.