基于超声脉冲反射的小曲率半径复合绝缘子检测技术  

Research on Small Curvature Radius Composite Insulator Detection Technology Based on Ultrasonic Pulse Reflection

作　　者：孙润林 屈国民 谭豪 谢亿 邱玮[1] 成磊 SUN Runlin;QU Guomin;TAN Hao;XIE Yi;QIU Wei;CHENG Lei(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China;Hunan Xiangdian Test and Research Institute Co.,Ltd.,Changsha 410208,China;State Grid Hunan Electric Power Company Limited,Changsha 410004,China;State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410208,China)

机构地区：[1]长沙理工大学能源与动力工程学院,湖南长沙410114 [2]湖南省湘电试验研究院有限公司,湖南长沙410208 [3]国网湖南省电力有限公司,湖南长沙410004 [4]国网湖南省电力有限公司电力科学研究院,湖南长沙410208

出　　处：《湖南电力》2024年第6期61-66,共6页Hunan Electric Power

基　　金：国网湖南省电力有限公司科技项目(5216A5180015)。

摘　　要：为降低复合绝缘子缺陷对电网安全运行带来的风险,针对曲率半径为13 mm的复合绝缘子缺陷问题开展超声检测技术研究,通过特制3 mm单晶片、5 MHz直探头和护套三种不同类型的复合绝缘子模拟厚度不均、气孔和脱黏缺陷,扫查分析三种缺陷的超声波特征。结果表明:该方法能有效检测护套厚度不均、气孔和脱黏缺陷,其中护套厚度测量精度为0.3 mm;气孔缺陷检测灵敏度为直径2 mm,定位精度为0.4 mm;脱黏缺陷检测特征为黏接剂界面反射波消失。该检测技术具有较高的效率,能提高现场检测的灵活性和实用性。In order to reduce the risk of composite insulator defects on the safe operation of the power grid,the ultrasonic detection technology is carried out for the composite insulator defects with a radius of curvature of 13 mm,and the ultrasonic characteristics of the three defects are swept and analyzed through the special 3 mm single crystal,5 MHz straight probe and sheath three different types of composite insulators simulating uneven thickness,porosity,and debonding defects.The results demonstrate that the method can effectively detect the defects of uneven thickness,porosity and debonding,in which the measurement accuracy of sheath thickness is 0.3 mm,the detection sensitivity of porosity defects is 2 mm in diameter,and the positioning accuracy is 0.4 mm and the detection of debonding defectsis characterized by the disappearance of the reflective wave at the interface of the adhesive.The detection method is highly efficient and can enhance the flexibility and practicality of on⁃site inspections.

关 键 词：电力绝缘 复合绝缘子 超声波检测 模拟缺陷 

分 类 号：TM855.1[电气工程—高电压与绝缘技术]