基于高频电流信号的电缆局部放电故障特征分析研究  

Fault characteristics analysis of cable partial discharge based on the high-frequency current signal

作　　者：严亚兵 江志文 肖俊先 甘星 林宇轩 YAN Yabing;JIANG Zhiwen;XIAO Junxian;GAN Xing;LIN Yuxuan(Electric Power Research Institute,State Grid Hunan Electric Power Co.,Ltd.,Changsha 410007,China;State Grid Hunan Electric Power Co.,Ltd.,Changsha 410118,China;Hunan Electric Test and Research Institute,Changsha 410004,China;College of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]国网湖南省电力有限公司电力科学研究院,湖南长沙410007 [2]国网湖南省电力有限公司,湖南长沙410118 [3]湖南省湘电试验研究院有限公司,湖南长沙410004 [4]西南交通大学电气工程学院,四川成都611756

出　　处：《供用电》2024年第3期96-102,共7页Distribution & Utilization

基　　金：国网湖南省电力有限公司科技项目(HN-YTKYBD01)。

摘　　要：电缆故障会影响电力的传输和分配,局部放电是电缆早期故障的表现之一,对其进行分析研究可以及时发现和修复故障。搭建了电缆局部放电试验平台,制作了环切划痕、气隙和金属颗粒等3种电缆缺陷,对电缆进行逐级加压,获得了10 kV交联聚乙烯电缆在多个电压等级下的高频电流数据,对其进行分析表明:3种不同缺陷电缆的特征差异较为明显,可以为电缆局部放电类型识别提供良好的参考依据。Cable faults can affect power transmission and distribution.Partial discharge(PD)is one of the manifestations of early cable faults,and its analysis and study can detect and repair the faults in time.The paper sets up an experimental platform for cable partial discharge,made three kinds of cable defects such as loop-cut scratches,air gap and metal particles,and applies pressure to the cable step by step.The high-frequency current data of 10kV cross-linked polyethylene cable under multiple voltage levels are obtained and analyzed.Analysis showed that the characteristics of the three cables with different defects are significantly different,which can provide a good reference for the type identification of cable partial discharge.

关 键 词：电力电缆 缺陷电缆制作 局部放电 高频电流 放电数据分析 

分 类 号：TM855[电气工程—高电压与绝缘技术]