基于地电位行波监测的故障定位技术研究  

Research on Fault Location Technology Based on Ground Potential Traveling Wave Monitoring

作　　者：刘国威 王琛 李成信 陈芳百 韦凯誉 玉聪 万山明[2] LIU Guowei;WANG Chen;LI Chengxin;CHEN Fangbai;WEI Kaiyu;YU Cong;WAN Shanming(Hechi Power Supply Bureau of Guangxi Power Grid Co.,Ltd.,Hechi 547000,Guangxi,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]广西电网有限责任公司河池供电局,广西河池547000 [2]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074

出　　处：《电气传动》2022年第4期62-68,共7页Electric Drive

基　　金：中国南方电网有限责任公司科技项目(GXKJXM20190061)。

摘　　要：提出利用地电位行波进行输电线路双端定位的方法,将行波监测终端安装于地电位端,安装维护不需要配合停电计划,可有效解决分布式故障诊断系统维护不便的难题。通常,110 kV及以上架空输电线路根据防雷需要,安装了地线,如果架空输电线路出现雷击或接地故障,导线上形成故障行波,由于电磁感应的作用,杆塔上形成了地电位端行波电流,当故障行波监测装置能够识别地电位行波电流,采集相应的行波波头,便能够进行故障位置的双端定位。通过实际挂网运行表明,杆塔及地线上安装分布式监测系统,能够快速准确地实现故障位置的确定。A method of using ground potential traveling wave to locate the two ends of transmission lines was proposed. The traveling wave monitoring terminal was installed at the ground potential end. Installation and maintenance did not need to cooperate with the power outage plan,which could effectively solve the problem of inconvenient maintenance of the distributed fault diagnosis system. Overhead transmission lines of 110 kV and above generally have a ground wire. In the event of a lightning strike or ground fault,not only a fault traveling wave will be generated on the wire,but also a fault traveling wave will be generated at the ground potential end and propagate along the tower. If the ground potential can be effectively detected,the propagating traveling wave current can realize the double-ended positioning of the ground potential end. The actual network operation shows that the installation of a distributed monitoring system on the pole tower and the ground line can quickly and accurately determine the fault location.

关 键 词：地电位 行波 双端定位 分布式监测系统 

分 类 号：TM743[电气工程—电力系统及自动化]