GIS支撑绝缘子内部放电缺陷综合诊断方法现场应用

Application of Comprehensive Diagnosis Method for Internal Discharge Defects of GIS Supporting Insulator

摘要:

介绍了基于特高频局部放电检测和X射线成像检测的气体绝缘金属封闭开关设备（GIS）支撑绝缘子内部放电缺陷综合诊断方法，并进行了分析和现场应用研究。以某110 kV GIS为例，利用特高频法对运行中的GIS进行局部放电检测，在检测到异常信号后，通过干扰排除和多通道信号时延定位确定缺陷位置、缺陷类型。对于支撑绝缘子内部放电缺陷，利用X射线成像检测技术对缺陷情况进行确认，从而实现缺陷综合诊断，指导设备检修。

Abstract:

The comprehensive diagnosis method for internal discharge defects of gas insulated switchgear (GIS) supporting insulator is studied based on ultra high frequency (UHF) partial discharge detection and X-ray imaging detection. Taking a 110 kV GIS for example,UHF method is used to detect the partial discharge of GIS which is in operation, and after detecting the abnormal signals, the defect position and defect type are determined by interference elimination and multi channel signal time delay location. For the internal discharge defects of supporting insulator, the defect condition is determined by X-ray defection so as to realize the comprehensive defect diagnosis and guide the equipment maintenance.