超高压输电线路单相弧光接地故障下潜供电流研究  

Research on Secondary ARC Current of EHV Transmission Line Under Single-Phase ARC Grounding Fault

作　　者：胡瑞 HU Rui(Chuzhou College of Mechanical and Electrical Engineering University,Chuzhou,Anhui 239054,China)

机构地区：[1]滁州学院机械与电气工程学院,安徽滁州239054

出　　处：《东北电力技术》2024年第5期22-25,共4页Northeast Electric Power Technology

基　　金：国家自然科学基金项目(11105002);安徽省高校自然科学一般研究项目(KJ2021B13)。

摘　　要：单相孤光接地故障下,电弧通道模型的精确度对故障点的潜供电流、弧道两端恢复电压的计算等起关键性作用。结合电弧发展过程的特点,采用精确电弧模型,研究潜供电流、恢复电压的特性。通过电磁暂态仿真软件ATP-EMTP结合某750 kV输电线路搭建本次仿真电路。通过仿真研究发现,当次级电弧熄灭后,由于并联补偿线路作用,故障相电压会出现振荡的聚集负荷,且当潜供电流熄灭后,故障相断路器触头两端会出现恢复电压,增加故障初电弧自动熄弧的难度,导致重合闸的失败,可为超高压输电线路单相弧光接地故障相关问题提供一定参考。The ARC channel model plays a key role in the calculation of the secondary ARC current at the fault point and the recovery voltage at both ends of the ARC under single-phase solitary grounding fault.Combine the characteristics of ARC development process,it uses a precise ARC model to study the characteristics of secondary ARC current and recovery voltage.The electromagnetic transient simulation software ATP-EMTP is combined with a 750 kV transmission line to build the simulation circuit.It can be found through the simulation that when the secondary ARC is extinguished,due to the action of the parallel compensation circuit,the fault phase voltage will appear an oscillating concentrated load,and when the secondary ARC current is extinguished,a recovery voltage will appear at the two ends of the contact of the fault phase circuit breaker.It increases the difficulty of automatic quenching of the initial ARC,resulting in the failure of reclosing.The research provides some reference for the problems related to single-phase ARC grounding fault of UHV transmission lines.

关 键 词：弧光接地 电弧模型 潜供电流 恢复电压 

分 类 号：TM866[电气工程—高电压与绝缘技术]