基于超宽带脉冲GPR雷达的电力接地网无开挖状态检测方法  

NDT method for Grounding Grid State Detection based on ultra-wideband pulse GPR radar

作　　者：范杨 钱金伟 辛巍 张慕婕 孟日恒 Yang Fan;Jinwei Qian;Wei Xin;Mujie Zhang;Riheng Meng(Hubei Electric Power Co.,Ltd.maintenance company of State Grid;Central China branch of State Grid;Wuhan University School of electronic information,Hubei Wuhan 430072)

机构地区：[1]国网湖北省电力有限公司检修公司 [2]国家电网华中分部 [3]武汉大学电子信息学院,湖北武汉430072

出　　处：《长江信息通信》2021年第1期234-237,共4页Changjiang Information & Communications

基　　金：高压接地网施工完整性检测方法课题资助,课题编号300009250-00027。

摘　　要：接地网状态与完整性对于电力系统安全经济运行至关重要。但高压/超高压输电线路与变电站的接地网作为隐蔽工程,传统开挖式检测效率低且存在二次破坏性。由于系统改造及长期土壤腐蚀会导致接地网破坏、腐蚀,文章设计并实现了一种超宽带脉冲GPR雷达无开挖的检测方法。考虑典型土壤性质和环境条件,利用matGPR仿真研究接地网几何特征、埋藏深度及腐蚀与GPR雷达回波特性的耦合关系,提出了基于速度场的高精度偏移成像算法,仿真实验与沙池实验证明接本文方法的可行性。Grounding grid status and integrity are critical to the safe and economic operation of power systems. However, as a concealed project, the grounding grid of high-voltage/ultra-high voltage transmission lines and substations has low efficiency and secondary damage. Due to system modification and long-term soil corrosion, the grounding grid will be damaged and corroded. This paper designs and implements a non-excavation detection method for ultra-wideband pulsed GPR radar. Considering typical soil properties and environmental conditions, matGPR simulation was used to study the coupling relationship between geometric characteristics, burial depth and corrosion of grounding grid and echo characteristics of GPR radar. A high-precision migration imaging algorithm based on velocity field was designed by sand pool experiment.

关 键 词：接地网GPR脉冲雷达 接地网腐蚀 信号特征 

分 类 号：TM862[电气工程—高电压与绝缘技术] TN958[电子电信—信号与信息处理]