基于模态分析的GIS盆式绝缘子带电检测技术  

Live Detection Technology of GIS Insulating Spacer Based on Modal Analysis

作　　者：李璐 彭琪 苏征 刘琛浩 宋颜峰 李军浩[2] LI Lu;PENG Qi;SU Zheng;LIU Chenhao;SONG Yanfeng;LI Junhao(Super High Voltage Company of State Grid Henan Electric Power Company,Zhengzhou 450006,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网河南省电力公司超高压公司,郑州450006 [2]西安交通大学电气工程学院,西安710049

出　　处：《高压电器》2025年第2期214-222,共9页High Voltage Apparatus

摘　　要：GIS盆式绝缘子表面污秽和裂纹等缺陷会使得其表面的闪络电压降低,严重危害电力网络的正常运行,因此盆式绝缘子状况检测研究对于保障电网安全运行具有重要意义。基于模态分析法,文中研制了盆式绝缘子状态带电检测系统,对盆式绝缘子表面污秽、裂纹缺陷开展试验研究。结果表明盆式绝缘子污秽缺陷会使得其模态传递函数幅值发生变化,且盆式绝缘子模态特性对于污秽质量的变化敏感;裂纹缺陷会使得盆式绝缘子模态传递函数极值点发生后移;表面污秽与表面裂纹缺陷共同作用下,模态传递函数的高频段2000~4000 Hz内幅值变化更剧烈,模态特性差异更明显。基于该检测系统开展现场测试,解体检查结果显示该检测系统可准确检测GIS盆式绝缘子状态。文中的研究为GIS盆式绝缘子状态的带电检测提供了一种新方法。Surface contamination and cracks of GIS insulating spacer can reduce the flashover voltage on its surface and seriously endanger the normal operation of power grid.Therefore,the study on condition detection of insulating spacer is of great significance to ensure safe operation of power grid.Based on the modal analysis method,the live condition detection system of insulating spacer is developed in this paper,and such defects as surface contamination and cracks of insulating spacer are tested and studied.The results show that the contamination defect of insulating spacer can remain the amplitude of modal transfer function changed,and the modal characteristics of the insulating spacer are sensitive to the variation of contamination quality.The crack defect can cause the extreme point of the modal transfer function of the insulating spacer to move backward.Under the joint action of the surface contamination and crack,the amplitude variation of modal transfer function in the high frequency band 2000-4000 Hz is more drastic and the modal characteristics difference is more obvious.The field test is performed based on the detection system,and the disassembly inspection results show that the detection system can accurately detect the condition of GIS insulating spacer.The research in this paper provides a new method for live detection of condition of insulating spacer in GIS equipment.

关 键 词：GIS 盆式绝缘子 状态检测 模态特性 传递函数 

分 类 号：TM216[一般工业技术—材料科学与工程]