电测与仪表2018，Vol.55Issue(11)：115-119,5.
高压单芯电缆单相接地故障护套过电压特性仿真分析
Simulation analysis of sheath overvoltage characteristic for single-phase ground fault in high voltage single-core cable
张重远 1芮皓然 1刘贺晨 1刘云鹏1
作者信息
- 1. 华北电力大学河北省输变电设备安全防御重点实验室,河北保定071003
- 折叠
摘要
Abstract
When the high-voltage power cable is in the laying process,in order to limit the induced voltage,increase the length of a single cable and reduce the intermediate connector,the metal sheath is usually grounded at two terminals with cross-bonding.If the power cable occurs single-phase ground fault,the high over-voltage is induced at the cross-bonding point,and it is harmful to insulation performance.This paper analyzes metal sheath overvoltage characteristics of the high-voltage single-core cables when there is a single-phase ground fault by electromagnetic transient calculation program EMTP.The effects of cable arrangement,grounding resistance,character of cable load,crossbonding cable length and mixed arrangement on the overvoltage of metal sheath are also studied.The research result indicates that the cable arrangement,cross-bonding cable length and mixed arrangement have greater impact on the metal sheath over-voltage,and the grounding resistance and characteristic of cable load have little effect on the metal sheath induced overvoltage.关键词
单芯电缆/接地故障/金属护套/感应过电压/EMTPKey words
single-core cable/ground fault/metal sheath/induced overvoltage/EMTP分类
信息技术与安全科学引用本文复制引用
张重远,芮皓然,刘贺晨,刘云鹏..高压单芯电缆单相接地故障护套过电压特性仿真分析[J].电测与仪表,2018,55(11):115-119,5.
