电力电缆线路的电磁环境影响因子分析  

Analysis on Influence Factors of Electromagnetic Environment for Underground Power Cable

作　　者：万保权[1] 干喆渊[1] 何旺龄[2] 裴春明[1] 张建功[1] 

机构地区：[1]电网环境保护湖北省重点实验室(中国电力科学研究院),湖北省武汉市430074 [2]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《电网技术》2013年第6期1536-1541,共6页Power System Technology

摘　　要：近年来电力电缆线路在城市输配电网中占有的比例越来越高,人们对电力电缆的电磁环境问题也逐渐开始关注。在参照架空输电线路电磁环境特性及其影响因子的基础上,结合电力电缆本身的特点,对其主要电磁环境影响因子(工频磁场)进行了模型建立和算法研究,并对3种典型分布的电力电缆工频磁场强度做了仿真分析,结果表明三相线路三角形排列能够较大程度地减小地面磁场强度。最后测试2条实际电力电缆线路的工频电磁场,其工频电场强度基本为背景值,符合理论分析;所测工频磁感应强度水平也在现行国家标准规定的磁场曝露限值要求以内。In recent years the power cable lines occupy much higher proportion of transmission lines in urban power transmission and distribution system, and people begins paying attention to electromagnetic environmental problem caused by power cables. On the basis of referring to the electromagnetic environmental characteristics and impact factors of overhead transmission lines and considering the features of power cable itself, the modeling of main electromagnetic environmental impact factors on power frequency magnetic field and corresponding algorithm are researched, and simulative analysis on typical distribution of three kinds of power frequency magnetic fields caused by power cable is performed. Simulation results show that the triangular arrangement of three-phase power cable can reduce magnetic field intensity at ground surface to a great extent. Finally the power frequency electromagnetic fields caused by two power cable lines are tested and the measured power frequency electromagnetic field intensities, which basically conform to the value of theoretical analysis, are negligible; the measured power frequency magnetic induction density levels are lower than the magnetic field exposure limits specified in current national standards.

关 键 词：电磁环境 电力电缆 工频磁场 

分 类 号：TM922[电气工程—电力电子与电力传动]