固定串补装置对特高压线路保护的影响及解决措施  

Influence of Fixed Cascade Compensation Device on UHV Line Protection and the Solutions

作　　者：侯剑武 刘涛 岳雷刚 汤会增 HOU Jianwu;LIU Tao;YUE Leigang;TANG Huizeng(Jiangxi Huadian Jiujiang Distributed Energy Supply Co.,Ltd.,Jiujiang Jiangxi 332000,China;Maintenance Company of Henan Electric Power Corporation,Zhengzhou 450051,China)

机构地区：[1]江西华电九江分布式能源有限公司,江西九江332000 [2]国网河南省电力公司检修公司,郑州450051

出　　处：《浙江电力》2020年第6期15-20,共6页Zhejiang Electric Power

摘　　要：为提高特高压线路输送功率,在特高压线路上安装了固定串补装置。分析了特高压串补线路在电压互感器不同的安装位置以及不同的故障点下,对线路保护距离元件和零序功率方向元件的影响,以及串补装置暂态过程产生的低频分量对线路保护的影响。介绍了特高压交流试验示范工程保护动模试验中暴露的与固定串补有关的问题及其解决办法。人工接地短路试验和多年的运行经验表明,经过优化完善的线路保护动作可靠,可以满足特高压交流系统安全稳定运行的需求。Fixed cascade compensation devices are equipped on UHV lines to improve transmission efficiency.This paper analyzes the impact of UHV cascade compensation lines on line distance protection and zero sequence power directional elements,and the effect of low-frequency components produced in the transient process on line protection;besides,problems related to fixed cascade compensation in the pilot project of UHV AC tests and protection action model test,as well as the solutions,are introduced.Manual earthing short-circuit tests and years of operating experience show that the improved line protection action is reliable and can meet the operation safety and stability requirements of the UHV AC system.

关 键 词：特高压线路 固定串补 线路保护 距离元件 暂态超越 

分 类 号：TM773[电气工程—电力系统及自动化]