基于磁场特性的接地网缺陷诊断研究  

Fault Diagnosis of Grounding Grid Based on Magnetic Field Characteristics

作　　者：罗赟[1] 陆文玲 LUO Yun;LU Wenling(Nanning College for Vocational Technology,Nanning,Guangxi,530008)

机构地区：[1]南宁职业技术学院,广西南宁530008

出　　处：《红水河》2021年第6期69-74,共6页Hongshui River

基　　金：2019年度广西高校中青年教师基础能力提升项目(2019KY1234)。

摘　　要：变电站接地网对于流入站内的短路电流或雷击电流具有十分重要的流散作用,然而,由于外界的物理或化学因素,接地网导体往往会发生腐蚀或断裂,因此,有必要对接地网导体的缺陷情况展开诊断。笔者建立了变电站接地网的缺陷诊断模型,根据接地网导体存在不同类型缺陷时导体上方的磁场分布特征的不同,提出了一种基于磁场特性的接地网导体的缺陷诊断方法。研究结果表明,该方法可以区分接地网导体断裂点和腐蚀点,以此来判断导体的故障类型和区域分布,从而提高了诊断的精度和效率,为变电站接地网故障诊断工作提供了理论参考。The substation grounding grid has a very important dispersion effect on the short-circuit current or lightning current flowing into the station.However,due to external physical or chemical factors,the grounding grid conductor tends to be corroded or fractured.Therefore,it is necessary to diagnose the defects of the grounding grid conductor.The fault diagnosis model of substation grounding grid is established.According to the different magnetic field distribution characteristics above the grounding grid conductor when there are different types of defects,a fault diagnosis method of grounding grid conductor based on magnetic field characteristics is proposed.The research results show that this method can distinguish the fracture points and corrosion points of the grounding grid conductor,so as to determine the fault type and regional distribution of the conductor,so as to improve the accuracy and efficiency of diagnosis,and provide a theoretical reference for the fault diagnosis of substation grounding grid.

关 键 词：接地网 变电站 故障诊断 磁感应强度 故障特征 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM63