双馈与直驱风电机组的小干扰稳定性对比分析  

Analysis on the Impact of DFIG and DDSG Wind Plant on the Small Signal Stability of the Power System

作　　者：李培强[1] 王继飞[1] 李欣然[1] 郝元钊[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2014年第1期92-97,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51277055)

摘　　要：清洁能源在电力系统中的大规模利用,使得风电机组在电网中的占比日益扩大,其运行特性极大地影响电力系统的运行稳定性.本文分析了双馈变速与直驱同步风电机组的结构特点,建立了各个机组的降阶数学模型.在此基础上,对两区域系统进行了仿真计算.研究表明:风电机组并网增加了系统与风电机组强相关的振荡模式,且有很好的阻尼特性.当风电机组在系统中容量比例提高时,双馈机组会减弱新增局部振荡模式的阻尼,直驱机组能提高区域内相关的局部振荡的阻尼.With the development of clean energy in the electric power system,wind power has been uti-lized in large scale ,but its characteristics will deeply affect the stability of the power system.This paper compared the wind turbine structure of the doubly-fed induction generator （DFIG）and direct drive syn-chronous generator （DDSG）,and analyzed their reduced order model.Wind power turbines were added to the system of two regional systems.The systems had good damping properties,but the systems＆#39;damping model was changed significantly.When wind power generator capacity increased in the system,doubly-fed induction generator could weaken the new local oscillation mode damping.Direct drive synchronous gener-ator could enhance the region associated with a local oscillation damping.

关 键 词：电力系统 风力机组 模态分析 小干扰稳定 

分 类 号：TM761[电气工程—电力系统及自动化] TM712