中压线路树木接地故障放电特性试验  

Discharge characteristic test of tree grounding fault of medium voltage line

作　　者：杨淳岚 陈天翔 杨博闻 张星海 范松海 YANG Chunlan;CHEN Tianxiang;YANG Bowen;ZHANG Xinghai;FAN Songhai(The College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China;Electric PowerScience Research Institute,State Grid Sichuan Electric Power Company,Chengdu 610000,China)

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059 [2]国网四川省电力公司电力科学研究院,四川成都610000

出　　处：《电力科学与技术学报》2022年第4期38-44,共7页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金区域创新发展联合基金重点支持项目(U19A2080)。

摘　　要：近年森林火灾频发导致重大人员伤亡事故与国民经济重大损失,影响电网的运行安全。发生森林火灾的原因除了雷电、人为等因素外,电力线路树木接地故障引发与否也是事故原因调查时争议很大的问题。以中压线路为主要研究对象,搭建火焰和树线放电试验平台,研究树木临近线路放电、树木因外部因素搭靠线路上放电和线路下方出现火焰时线路放电的故障特征,提出山火引发线路故障与线路树木故障的辨识依据;提出树木接地故障理论模型,预测树木接地时泄漏电流等电气参量幅值,为制定防范电网树线故障引发山火事故措施提供思路。The frequent occurrence of forest fires in recent years has led to major casualties and significant losses of the national economy,affecting the operational safety of the power grid.Besides lightning,human and other factors,whether the power line tree failure triggered is also a highly controversial issue in the investigation of the cause of the occurrence of forest fires.This paper takes the medium-voltage line as the main research object,a flame and tree-line discharge test platform is built.The fault characteristics of tree discharge near the line,tree discharge due to external factors hitching on the line and line discharge when the flame appears below are studied,and the identification basis of line fault causes by mountain fire or tree is proposed.Finally a theoretical model of tree grounding fault,which can predict the amplitude of electrical parameters such as leakage current is proposed.This study can provide ideas to the prevention of tree line faults in the power grid caused by mountain fire.

关 键 词：中压线路 树木放电 放电特性 故障模型 试验研究 

分 类 号：TM852[电气工程—高电压与绝缘技术]