变电站接地网结构判断与缺陷诊断方法  

Method of Structure Estimation and Fault Diagnosis of Substations' Grounding Grids

作　　者：刘洋[1] 崔翔[1] 赵志斌[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北省保定市071003

出　　处：《中国电机工程学报》2010年第24期113-118,共6页Proceedings of the CSEE

基　　金："十一五"国家科技支撑计划重大项目(2006BAA02A20);华北电力大学博士基金项目(200912008)~~

摘　　要：为了推断变电站接地网的结构,寻找缺陷部位和缺陷状态,利用接地网现有的两下引导体直接注入正弦波电流,通过测量地表面磁感应强度的分布,判断出接地网的结构。根据磁感应强度的分布特征和变化规律,寻找接地网缺陷部位,诊断网格导体断点和变细的缺陷状态。实验研究结果表明,所提方法简便、有效,可用于工程实际。In order to estimate grounding grids＇ structure of substation,search the fault position and diagnosis the fault state,a sine wave current was injected directly into grounding grid by two existing ground lead wires.At the same time,the distributions of the surface magnetic induction intensities were measured.Then the structure of grounding grids was concluded and the faults position was deduced.The fault states of mesh conductor becoming thin or broken could be diagnosed based on the distribution characteristics and changing laws.The experimental results show that the method is simple and effective,and it can be used in engineering practice.

关 键 词：变电站 接地网 磁场测量 结构判断 缺陷诊断 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM41