风电场等值建模研究综述

随着风电场规模的不断增大，对风电场中每台风机建模将造成计算量过大，不利于大型风电场的研究，需要对风电场进行等值化简。对双馈感应风机和直驱永磁同步风机两种当前热门机型的建模进行概述，同时介绍了潮流计算中风电场的处理方法，并对风电系统的等值进行了综述，包括风速的等值、风电场的分群、同群风机的等值方法、常用的参数优化算法及其对等值的影响。最后综述了含单一主流机型风电场通常采用的等值方法，并指出随着不同机型并存的大型混合风电场的增多，混合风电场等值建模研究的必要性及研究趋势。

Overview of the equivalent model research for wind farms

With the scale of wind farm increasing, modeling for each turbine in wind farm will lead to excessive computing, which is not conducive to the research of large-scale wind farms. Wind farms need to be simplified. Firstly, the modeling of doubly fed induction generator and direct-drive permanent magnet synchronous generator which are frequently used currently is summarized. Meanwhile, the methods of dealing with the wind farm in load flow calculation are introduced. Then the aspects of wind power system equivalence are described which include wind speed equivalence, clustering of wind farms, equivalent method of the same group of wind turbines, widely used parameter optimization algorithms and the effect of those optimization algorithms on equivalence. Finally, the commonly used equivalent methods of wind farms composed of single mainstream wind turbine type are reviewed, and the research necessity and trend of the mixed wind farm equivalent modeling with the increasing of amount of the large wind farms composed of different types of wind turbines are pointed out.