架空线路接地极缺陷诊断的模拟与仿真  

Modeling and Simulation of Fault Diagnosis of Overhead line Grounding Grids

作　　者：朱泽慧 龙钢 扈海泽 肖星 黎铭 莫异 ZHU Zehui;LONG Gang;HU Haize;XIAO Xing;LI Ming;MO Yi(Maintenance Company,State Grid Hunan Electrical Power Corporation,Changsha 410004,China;School of Information Science and Engineering,Jishou University,Xiangxi 416000,China)

机构地区：[1]国网湖南省电力公司检修公司,长沙410004 [2]吉首大学信息科学与工程学院,湖南湘西416000

出　　处：《电力与能源》2018年第4期510-513,519,共5页Power & Energy

摘　　要：为解决对目前部分架空线路接地极腐蚀情况的预判和诊断问题,分析了针对计算架空线路接地极周围电磁场的多种数值计算方法,详细介绍了模拟电荷法、矩量法、边界元法、有限元法或者两种方法的结合等方法。在此基础上使用MATLAB数值计算分析软件、运用有限元法对架空线路接地极的磁场强度进行仿真计算分析,并模拟架空线路接地极存在断点、变细等缺陷,计算其存在缺陷时磁感应强度的变化情况,将计算分析结果用ORIGIN PRO画图软件清晰的呈现出来,将标准的架空线路接地极磁感应强度和有缺陷的接地极的磁感应强度进行对比,此方法对架空线路接地极的腐蚀情况可以进行预判和诊断。In order to solve the problems in predicting and diagnosing the erosion of grounding grids of overhead lines,the paper firstly analyzes numerical calculation methods about electromagnetic field,and expound Charge Simulation Method,Method of Moment,Vector sum method,Finite Element Method,as well as the combination of two methods. Thereupon,MATHLAB software and Finite Element Method are used to simulate calculation of the magnetic field strength of grounding grids of overhead lines,and simulate the defects of overhead line grounding,such as breakpoints,becoming thinner,etc.,and the magnetic induction intensity is calculated. The ORIGIN PRO drawing software vividly reflects the results. In comparison,the modeling and simulation is useful for predicting and diagnosing the erosion of the grounding grids.

关 键 词：有限元法 接地极 腐蚀 MATLAB数值计算 

分 类 号：TM863[电气工程—高电压与绝缘技术]