灵宝背靠背直流换流站220kV换流变压器故障保护动作分析  

Protection Action Analysis of Lingbao HVDC System 220kV Converter Transformer Earthed Fault

作　　者：吕鹏飞[1] 卢宇[2] 王德林[1] 王玉玲[1] 舒治淮[1] 李海英[2] 

机构地区：[1]国家电力调度通信中心,北京市100031 [2]南京南瑞继保电气有限公司,江苏省南京市211100

出　　处：《电力系统自动化》2008年第12期100-103,共4页Automation of Electric Power Systems

摘　　要：介绍了灵宝背靠背直流换流站220kV换流变压器阀侧套管接地故障过程和保护动作情况。在简要介绍直流接地过流保护原理的基础上,分析了换流变阀侧接地故障的故障特征以及换流阀换相过程对故障电流的影响。通过对故障过程中保护动作情况的分析,总结了灵宝背靠背直流保护对换流变阀侧接地故障的响应情况,提出了在背靠背直流换流站中针对直流接地故障的保护功能设置应进一步完善的环节,对工程设计及现场运行具有一定的指导意义。The earth fault of Lingbao back-to back HVDC system 220 kV side converter transformer and the protection action are described. By employing the DC earthed protection theory, this paper analyzes the characteristics of the converter transformer earth fault and the influence of converter commutation. Based on an analysis of protection action during the fault, this paper sums up the DC earthed protection response to converter transformer valve side earth fault and recommends improvement of the DC protection function.

关 键 词：直流输电 背靠背 换流变压器 接地故障 保护 换相过程 

分 类 号：TM772[电气工程—电力系统及自动化]