同塔四回混压输电线路感应电压与电流分析  

Induced voltage and current analysis for four-circuit transmission line with different voltage classes on the same tower

作　　者：罗日成[1] 李志前[1] 李稳[1] 唐祥盛 伍珊珊 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410004 [2]中南勘测设计研究院有限公司,湖南长沙410004

出　　处：《电力科学与技术学报》2015年第1期52-59,共8页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(50977003);电力与交通安全监控及节能技术教育部工程研究中心基金(2010#03)

摘　　要：介绍同塔四回输电线路感应电压、电流的计算理论,以某220 k V/110 k V同塔四回输电线路为研究对象,采用电磁暂态程序（ATP-EMTP）搭建线路分布式参数模型,仿真分析不同运行电流、相序排列方式、导线水平间距以及回路垂直间距对一回停运检修线路感应电压和感应电流的影响,并计算分析检修点两侧挂临时接地线流过检修人员的感应电流。计算结果表明：线路运行电流主要影响检修线路的电磁感应分量;线路相序排列方式对感应电压、电流影响显著;线路感应电压、电流与导线水平间距和回路垂直间距呈反相关关系;检修点两侧挂临时接地线时,流过人体的感应电流6-8 m A,大于人体的感知电流,在检修点加挂临时接地线后,流过人体的感应电流0.5~0.7μA,满足带电作业的要求。The calculation method for induced voltage and current in four-circuit transmission line on same tower was proposed in this paper.A distributed parameter model for 220/1 10kV four-circuit transmission lines was set up by using electromagnetic transient program （ATP-EMTP）, and the influence of different operation current,phase sequence arrangement,horizontal distance and vertical distance on induced voltage and current was simulated,and the induced current flow-ing through person in the cases of temporary grounding line was calculated and analyzed system-atically.The results showed that the operation current mainly affects the electromagnetic induc-tion component,the arrangement of phase sequence impacts the induced voltage and current sig-nificantly,and the relation between induced voltage,induced current and horizontal distance,vertical distance are inverse correlation.When the temporary grounding line on both sides of the maintenance position,induced current flowing through a person was about 6-8 mA,which is be-yond the perception current of human,and when adding temporary grounding line in the maintenance point,the induced current was about 0.5-0.7 μA,which meet the requirement of live working.

关 键 词：同塔四回输电线路 运行电流 相序排列方式 感应电压 感应电流 

分 类 号：TM751[电气工程—电力系统及自动化]