内蒙古电力技术2026，Vol.44Issue(3)：88-97,10.DOI:10.19929/j.cnki.nmgdljs.2026.0036
一起500kV GIS内部机械运动部件缺陷引起的局部放电分析
Partial Discharge Analysis Caused by Internal Mechanical Moving Parts Defects in 500 kV GIS
凌应河 1李玉杰 2张照辉 2朱润卿 2冯侨钧1
作者信息
- 1. 南京宁众人力资源咨询服务有限公司,南京 210000
- 2. 国网江苏省电力有限公司电力科学研究院,南京 210000
- 折叠
摘要
Abstract
In response to the abnormal partial discharge defect of the gas insulated switchgear(GIS)circuit breaker in a 500 kV substation,ultrasonic and ultra-high frequency(UHF)methods are used for on-site live detection and positioning,while X-ray is adopted for defect verification.The video endoscope is employed to examine the distribution of foreign matters,and the scanning electron microscope(SEM)combined with energy dispersive spectrometer(EDS)is applied for component analysis.Combined with the full-process disassembly inspection after returning to the factory,the source of foreign matters is traced and the causes of defects are analyzed.The direct cause of the abnormal partial discharge is electric field distortion caused by foreign matter accumulation resulting from defects in internal mechanical moving parts of the GIS.The root cause is continuous foreign matter accumulation due to equipment design deficiencies and inadequate production process control,which ultimately leading to partial discharge.A four-in-one strategy incorporating equipment rectification,specialized inspection,enhanced monitoring,and process optimization is proposed for treatment,operation and maintenance prevention and control,providing a technical reference for fault diagnosis of similar equipment.关键词
GIS断路器/局部放电/X射线/解体分析/工艺缺陷Key words
GIS circuit-breaker/partial discharge(PD)/X-ray/disassembly analysis/process defect分类
信息技术与安全科学引用本文复制引用
凌应河,李玉杰,张照辉,朱润卿,冯侨钧..一起500kV GIS内部机械运动部件缺陷引起的局部放电分析[J].内蒙古电力技术,2026,44(3):88-97,10.
