基于金属护套电流和电压的电缆终端接地系统故障诊断方法  

Fault Diagnosis Method of Cable Terminal Grounding System Based on Metal Sheath Current and Voltage

作　　者：吴柱荣 吴家泰 李珠江 WU Zhurong;WU Jiatai;LI Zhujiang(Dongguan Power Transmission and Transformation Engineering Co.,Ltd.,Dongguan 523413,China)

机构地区：[1]东莞市输变电工程建设有限责任公司,广东东莞523413

出　　处：《电工技术》2025年第3期138-141,145,共5页Electric Engineering

摘　　要：通过分析电缆终端各结构的连接关系和材料,建立终端各种缺陷的等值电路。利用COMSOL Multiphysics软件计算终端分布参数,最后仿真分析不同终端缺陷下的终端护层电流和电压,结果揭示了铜网状态、封铅与铝护套接触面积、封铅与尾管铅封断裂对终端电流和电压的影响。By analyzing the connection relationship and material of each structure of the cable terminal,the equivalent circuit of various defects of the terminal is established.The COMSOL Multiphysics software is used to calculate the terminal distribution parameters.Finally,the terminal sheath current and voltage under different terminal defects are simulated and analyzed.The results reveal the effects of copper mesh state,contact area between lead sealing and aluminum sheath,lead sealing and tail pipe lead sealing fracture on terminal current and voltage.

关 键 词：电缆终端 金属护套 接地系统 故障诊断 

分 类 号：TM930[电气工程—电力电子与电力传动]