10 kV架空线路电场分布特性仿真分析  

Simulation Analysis of Electric Field Distribution Characteristics of 10 kV Overhead Lines

作　　者：张尧 李子森 严秦 覃远铖 唐金锐[2] ZHANG Yao;LI Zisen;YAN Qin;QIN Yuancheng;TANG Jinrui(Guangzhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Guangzhou 510620,China;School of Automation,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]广东电网有限责任公司广州供电局,广东广州510620 [2]武汉理工大学自动化学院,湖北武汉430070

出　　处：《电工技术》2022年第23期137-141,共5页Electric Engineering

基　　金：中国南方电网有限责任公司科技项目(编号080008KK52190008(GZHKJXM20190097))。

摘　　要：为了研究架空线路下方的电场分布特性,建立了10 kV架空线路的有限元三维仿真模型,讨论了三相导线在不同排列方式下正常运行及发生单相接地故障时的电场分布特性。研究结果表明,正常运行时,相导线各种排列方式下方的电场分布在水平方向上均关于中心导线对称,离地1.5 m处的最大电场强度由大到小依次为双回路同相序垂直排列,单回路垂直、正三角、水平、倒三角排列;当架空线路发生单相接地故障时,其电场分布特性与正常运行时有着明显差异,在离地1.5 m处产生的最大电场强度约为正常运行时的3.43~5.8倍。该研究结果可为10 kV架空线路设计提供参考。To study the electric field distribution beneath the overhead line,in this paper,a three-dimensional finite element simulation model of a 10 kV overhead transmission line is established.The electric field distribution characteristics of three-phase conductors in normal operation and single-phase grounding fault under different arrangement modes are discussed.The results show that in normal operation,the electric field distribution under various arrangements of phase conductors is symmetrical about the central conductor in the horizontal direction.The maximum electric field intensity at 1.5 m above the ground is in the descending order of double-loop in-phase sequence vertical arrangement,single-loop vertical,positive triangle,horizontal and inverted triangle arrangement.When a single-phase ground fault occurs on the overhead line,the electric field distribution characteristics of the transmission line are obviously different from those in normal operation.The maximum electric field strength at 1.5 m above the ground under each phase conductor arrangement is about 3.43~5.8 times of that in normal operation.The research results of this paper can provide a reference for the design of 10 kV overhead lines.

关 键 词：电场分布 有限元法 电场强度 架空线路故障 

分 类 号：TM726[电气工程—电力系统及自动化]