广东电力2018，Vol.31Issue(12)：20-26,7.DOI:10.3969/j.issn.1007-290X.2018.012.003
交直流电缆共同敷设隧道内电磁场环境
Electromagnetic Environment in Utility Tunnel with AC and DC Cable
摘要
Abstract
In order to analyze possible reasons for the phenomenon of electric paralysis that happened to the operation and maintenance personnel in the utility tunnel laid w ith AC and DC cable, the paper studies distribution of electric field and magnetic field in the tunnels w ith±320 k V DC cable line and 220 k V AC cable line based on the finite element method.Firstly, it calculates induction potential in DC cable core and sheath w hich caused by AC cable and determines feasibility of AC and DC cables laying in the same tunnel.Secondly, it w orks out magnetic field in the tunnel, then uses the the Gauss meter to measure the field and compares the result w ith simulation result.Finally, by using the finite element iteration method, it determines accumulation of space charge in the sandbox and analyzes possible reasons for the phenomenon of electric paralysis.It has discovered that the magnetic induction of the HVDC side of the tunnel is as high as 1.6 mT, w hich greatly exceeds the limit of public exposure of the magnetic induction in the cable tunnel, and the sandbox is one of the main reasons for causing this phenomenon.关键词
交直流/电缆/隧道/电磁场/沙箱Key words
AC and DC/cable/tunnel/electromagnetic field/sandbox分类
信息技术与安全科学引用本文复制引用
严有祥,朱婷,陈朝晖,陈日坤,林智雄,张玮玮,杨智鹏..交直流电缆共同敷设隧道内电磁场环境[J].广东电力,2018,31(12):20-26,7.基金项目
国家电网有限公司科技项目 (2015329) （2015329）
