过渡电阻对不同阻抗特性的影响分析  

Analysis of Influence of Transition Resistance on Different Impedance Characteristics

作　　者：李子添 张紫凡 肖燕純 李振伟 LI Zitian;ZHANG Zifan;XIAO Yanchun;LI Zhenwei(School of Electrical Engineering,Guangzhou College of South China University of Technology,Guangzhou Guangdong 510800,China)

机构地区：[1]华南理工大学广州学院电气工程学院,广东广州510800

出　　处：《湖北电力》2020年第4期28-34,共7页Hubei Electric Power

基　　金：2020华南理工大学广州学院SRP项目(项目编号:55JY200502);广东省高等教育教学改革项目(项目编号:55SC180302);华南理工大学广州学院校级项目(项目编号:55-CQ18YG17)。

摘　　要：通过对距离保护的原理进行简单的阐述,对阻抗圆继电器和四边形继电器的特性进行了说明,并基于仿真软件PSCAD搭建了110 kV输电线路距离保护模型。通过对模型进行不同故障情况的仿真了解过渡电阻对距离保护的影响,然后采用四边形阻抗继电器再进行相同条件的仿真。仿真结果表明,过渡电阻达到一定大小时会使距离保护拒动,采用四边形阻抗继电器之后能在一定程度上消除过渡电阻对距离保护带来的影响。This paper first sets forth the principle of distance protection simply,describes the characteristics of impedance circle relay and quadrilateral relay,and also builds the 110 kV transmission line distance protection model based on the simulation software PSCAD.And then,the paper studies the influence of transition resistance on distance protection by simulating different fault conditions,and finally uses quadrilateral impedance relay to simulate the same conditions.The simulation results show that the distance protection will miss operation when the transition resistance reaches a certain value,and that use of quadrilateral impedance relay can eliminate the influence of transition resistance on distance protection to a certain extent.

关 键 词：过渡电阻 距离保护 PSCAD仿真 四边形阻抗继电器 

分 类 号：TM58[电气工程—电器]