基于SH波的接地引下线局部腐蚀变细检测研究  

Study on Local Corrosion Thinning Detection of Ground Down Conductor based on SH Wave

作　　者：刘继承 何相升 胡龙江 方春华[2] 吕俊杰 侯新文 LIU Jicheng;HE Xiangsheng;HU Longjiang;FANG Chunhua;LÜJunjie;HOU Xinwen(State Grid Hubei Electric Power Company Ultra-high Voltage Company,Wuhan 430050,China;China Three Gorges University,Yichang 443002,China)

机构地区：[1]国网湖北省电力公司超高压公司,武汉430050 [2]三峡大学,湖北宜昌443002

出　　处：《电工材料》2024年第3期21-24,共4页Electrical Engineering Materials

基　　金：2022年度电网环境保护国家重点实验室开放基金项目资助(GYW5120221415)。

摘　　要：接地引下线作为电气设备和接地网的连接枢纽,其所处的环境使其容易发生局部腐蚀甚至断裂,危及工作人员以及电气设备的安全。与接地引下线的传统检测方法相比,超声导波检测技术检测范围更广、检测精度更高、没有使用局限且更加省时省力。因此本文对接地引下线的不同局部腐蚀程度下超声导波的检测情况进行分析,在COMSOL Multiphysics中开展有限元建模和仿真研究。研究结果表明:SH波在扁钢中具有较好的传播能力,可用于接地引下线的腐蚀缺陷检测;腐蚀局部变细程度越严重,缺陷回波信号的波幅越大,信号的峰值也越高,更利于缺陷的识别。As the connection hub of electrical equipment and grounding network,the grounding lead is located in an environment that makes it prone to corrosion locally or even fracture,endangering the safety of staff and electrical equipment.Compared with the traditional detection method of the lead-down line,ultrasonic guided wave detection technology has a wider detection range,higher detection accuracy,no limitation of use,and more time-saving and labor-saving.The detection of ultrasonic guided waves under different degrees of local corrosion of the ground lead was analyzed,and the finite element modeling and simulation research was carried out in COMSOL Multiphysics.The results show that SH waves have good propagation ability in flat steel and can be used for corrosion defect detection of ground lead downline;And the more serious the degree of local fineness of corrosion,the bigger the amplitude of the defect echo signal,and the higher the peak of the signal,which is more conducive to the identification of defects.

关 键 词：接地引下线 超声导波 扁钢 腐蚀缺陷检测 

分 类 号：TM862.3[电气工程—高电压与绝缘技术]