电磁耦合效应对通信光缆检修的影响研究  

Research on electromagnetic coupling effects to communication optical cable maintenance

作　　者：杨新伟[1] 刘伟娜[1] 

机构地区：[1]河南师范大学电子与电气工程学院,河南新乡453007

出　　处：《电力科学与技术学报》2016年第4期195-201,共7页Journal of Electric Power Science And Technology

摘　　要：同塔多回输电线路下方存在与之平行排列的架空通讯光缆,电磁感应作用下悬挂光缆钢芯线上会产生电磁感应电流,对光缆检修人员的安全构成威胁。运用电磁暂态仿真软件ATP-EMTP,搭建500 k V/220 k V同塔四回混压输电线路,以及其下方平行排列架空光缆模型,分析计算运行电流、土壤电阻率、平行长度、通讯光缆杆塔高度以及光缆偏移输电线路杆塔中心线距离对人体电流的影响。计算结果表明:人体电流与运行电流、土壤电阻率、平行长度以及通讯杆塔高度成正比,与通讯光缆偏移输电线路杆塔中心线的距离成反比;一般情况下,人体电流不会超过10m A(人体摆脱电流阈值),但是会超过0.5 m A(人体感知电流),研究结果能为实际工程提供参考。The communication optical cable is located under 500 k V /220 k V four-circuit mixed-voltage transmission lines on the same tower. Electromagnetic induced current was produced on the steel core line to suspend communication cable,which is a threat to personal safety. An equivalent model which included four-circuit mixed-voltage transmission lines and communication optical cable was built by ATP /EMTP. Then the effect of factors on human current were considered,such as operation current,soil resistivity,parallel length,the height of communication optical cable tower and the distance between the central line and the communication optical cable. The results show that operation current,soil resistivity,parallel length and the tower height are positive proportional to human current,and the distance from tow-er central line is negative proportional to human current. The calculation results provide guidance for practical engineering application.

关 键 词：同塔四回 通讯光缆 电磁耦合 电磁感应电流 人体电流 

分 类 号：TM913.7[电气工程—电力电子与电力传动]