变电站接地网断点和腐蚀磁场探测与评估方法  

Detection and Evaluation Method of Breakpoint and Corrosion Magnetic Field of Substation Grounding Grid

作　　者：张树亮 刘东亮 徐洪福 宋文乐 王璐 ZHANG Shuliang;LIU Dongliang;XU Hongfu;SONG Wenle;WANG Lu(State Grid Hebei Electric Power Company Co.,Ltd.,Cangzhou Power Supply Branch,Cangzhou 061001,China;Science&Technology College,North China Electric Power University,Baoding 071003,China)

机构地区：[1]国网河北省电力有限公司沧州供电分公司,河北沧州061001 [2]华北电力大学科技学院,河北保定071003

出　　处：《电瓷避雷器》2020年第5期190-193,共4页Insulators and Surge Arresters

摘　　要：埋于地下的接地网因为断点和腐蚀变细的缺陷对变电站造成潜在的安全隐患,基于电磁感应方法提出一种准确获得接地网状态的探测方法,利用这种方法不需要接地网图纸即可获知接地网的主体结构、导体位置及缺陷隐患。设计了整套检测系统,包含测量硬件系统、测量、诊断和分析软件系统。仿真和应用结果表明这种方法在实际工程中简便有效。The grounding grid buried in the earth will become a hidden danger to the safety of substations due to some faults of breaks or thinner conductors in corrosion. A novel method to get accurate status of ground grid was proposed based on measuring magnetic induction intensity. The basic structure of ground grid without working drawing was concluded,the positions and the status of faults were diagnosed by this method. The completed detecting system,including hardware device of data measurement,diagnosis and analysis software are introduced concisely. The results of simulations and applications show that this method is simple and effective in the practical engineering.

关 键 词：接地网 结构 缺陷状态 磁感应强度 诊断 

分 类 号：TM63[电气工程—电力系统及自动化] TM862