基于暂态行波电流方向的电缆故障研究  

Research on Cable Fault Based on Transient Traveling Current Direction

作　　者：陈海涛 朱道俊 杨振邦 CHEN Haitao;ZHU Daojun;YANG Zhenbang(Dali Power Supply Bureau,Yunnan Power Grid Co.,Ltd.,Dali 671000,China)

机构地区：[1]云南电网有限责任公司大理供电局,云南大理671000

出　　处：《电工技术》2022年第7期16-19,24,共5页Electric Engineering

摘　　要：电力电缆凭借其独特的结构和优越的性能在电网输电中占比越来越大,随之而来的是电缆故障解决方式的改变。传统的故障测距方法是解列电缆,不仅耗时长、效率低,还可能使正常运行的电缆产生隐患,因此需通过更有效的方法进行电力电缆的故障查找。通过搭建PSCAD模型,结合MATLAB分析数据,对电力电缆进行了故障区分,通过辨别电力电缆故障时暂态行波的方向区分电力电缆故障,对不同运行方式的电力电缆进行建模分析,暂态行波方向法均能实现电力电缆故障的区分,从而实现电力电缆局放监测。With its unique structure and superior performance,power cable accounts for an increasing proportion in power grid transmission,followed by the change of cable fault solution.The traditional fault location method is to disconnect the cables,which is not only time-consuming and inefficient,but also may cause hidden dangers to the cables in normal operation.Therefore,it is necessary to find the faults of power cables through more effective methods.By building PSCAD model and analyzing the data with MATLAB,the fault of power cable is distinguished.By distinguishing the direction of transient traveling wave in case of power cable fault,the power cable fault is distinguished,and the power cables with different operation modes are modeled and analyzed.Transient traveling wave direction method can distinguish power cable faults,so as to realize power cable partial discharge monitoring.

关 键 词：电力电缆故障 PSCAD模型 暂态行波方向 故障判定 

分 类 号：TM726.4[电气工程—电力系统及自动化]