不同类型风电机组对系统短路容量的影响  

Influence of different wind turbines on short circuit capacity of system

作　　者：季宇 吴鸣 刘海涛 董浩 Ji Yu;Wu Ming;Liu Haitao;Dong Hao(China Electric Power Research Institute Co.,Ltd.,Beijing 100192,China)

机构地区：[1]中国电力科学研究院有限公司

出　　处：《电测与仪表》2019年第22期72-78,共7页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目(PDB51201701386)

摘　　要：随着风电机组的大规模并网,研究风机并网对系统短路容量的影响意义重大。文中考虑短路故障发生的不同位置,分别分析了恒速异步风机、双馈风机以及直驱永磁式风机在短路故障发生时的短路电流,得到故障时刻三种不同类型风机的短路电流的表达式和影响因素。分别搭建含三种风机的配电网模型,仿真相同容量的不同类型风机在系统发生短路后的输出电流以及对系统短路容量的影响情况。仿真结果表明,相同容量的不同类型风机对系统的短路容量具有不同影响,风机的低电压穿越保护装置的动作情况也会对系统短路容量产生较大的影响。With the large-scale wind generation connected to power grid,it is of great significance to study the impact of wind generation on short circuit capacity of the system.In this paper,the location of short circuit fault is considered,and the short circuit current of fixed speed induction generator,double-fed induction generator and permanent magnet synchronous generator is analyzed.The expressions of short circuit currents and influencing factors on system of three different wind turbines are obtained at the failure time.A distribution network model containing three types of wind turbines is built,and the output current of different wind turbines with the same capacity and its influence on the short circuit capacity of the system are simulated.The simulation results show that different wind turbines of the same capacity have different effects on the short circuit capacity of the system,the action of low voltage ride through protection devices will also have a great influence on the short circuit capacity of system.

关 键 词：风电机组 短路容量 短路位置 保护装置 

分 类 号：TM93[电气工程—电力电子与电力传动]