文档介绍：电工电气 ) 1 (201 电力电缆故障探测方法研究
电力电缆故障探测方法研究
任艳阳,任艳霞
(1中南大学物理科学与技术学院,湖南长沙0083;2 41 国核工程有限公司,上海 33) 2002
摘要:随着大量电力电缆的投运,相应的电缆故障率也随着使用年限上升,列举了电缆故障探测
的传统方法及其缺点,介绍了电缆故障探测的新方法,对中性点在不同接地方式下产生单相接地故障进
行了仿真分析,利用Bdd'波对故障信号进行处理,并通过算例证明了该方法具有很高的测距精度。
关键词:电缆故障;测距;小波变换
中图分类号:TM755 文献标识码:B 文章编号:1007—3175(2011)04—0014—05
Study0fPOwer Cable Fault Detection Methods
REN Yan—yang .。
(1 School ofPhysical Science and Technology,Central South University,Changsha 4 1 0083,China; 1 4 University,Changsha South andTechnology,Central Science ofPhysical School (1
2 State N2State uclearPower pany,Shanghai 200233,China)
Abstract:Followinggreatquantity ofpower cables being putinto operation,relevantcablewith risesrate usefaults years —
per listed traditional mtraditional perlisted ethods ofcable detection their was m adeto thenew m ethoddetectionfor cable faults
and simulationwas carried out forsingle phase grounding generatedfault under neutral point indifferent grounding wavelet
was usedprocessto andsignalsfault calculation examplesproved methodthis that was with very high distance detection accuracy.
Key words:cablefault;distance detection;wavelettransform
0 引言及复合型故障(电缆线路具有两种或两种以上故障
特性)。电力电缆的故障测距方法很多, 目前离线
随着我国国民经济的高速发展和城市电网改造测距主要有以下几类⋯。
的完成,各种电力电缆在全国各工矿企业、事业单 1)经典电桥法:将被测电缆故障相与非故障相
位得到了广泛的应用。电缆的