计及尾流效应的双馈机组风电场等值建模研究

Study on equivalent model of wind farms with DIFG considering wake effects

针对双馈机组风电场内机组间尾流的相互影响,提出一种新的风电场等值建模方法。该方法考虑尾流效应,定义了"尾流影响因子"表征各台风电机组受其他风电机组尾流影响的程度,并以此作为风电场内风电机组的分组依据。将风向作为输入,从而进行风电机组的分组以及合并等值。同时给出了合并后等值模型参数的计算方法,得到风电场的多机等值模型。仿真结果表明,利用该方法建立的等值模型较之传统的等值模型能更准确地体现风电场的功率输出特性。

As to the mutual effect of wake turbulence among wind turbines in a wind farm with wind turbine driven doubly fed induction generator （DFIG）, a new equivalent modeling method is proposed. This method considers the wake effects of wind turbines and defines the wake effect factor which shows how one wind turbine is affected by the others. This method also uses this factor as a grouping rule of wind turbines. Using wind direction as input, the calculating method groups the wind turbines and aggregates the same group. The calculating method of equivalent model parameters is provided, thus a wind farm model which is represented by few wind turbines is obtained. Compared with the traditional equivalence model, the simulation results show that the equivalent model based on the proposed method describes the power output of wind farms more accurately.