高压电器2018，Vol.54Issue(5)：9-16,8.DOI:10.13296/j.1001-1609.hva.2018.05.002
直流GIL绝缘子表面附着金属颗粒局部放电发展过程及严重程度评估
Evolution Process and Severity Assessment of the Partial Discharge Caused by Immobilized Metal Particles on DC GIL Insulator Surface
摘要
Abstract
Immobilized metal particles on DC GIL insulator surface significantly reduce the flashover voltage on the insulator surface,which is a common defect in DC GIL. To study the evolution process and severity assessment of partial discharge caused by immobilized metal particles on DC GIL insulator surface,we established a 220 kV GIL equipment platform. By gradually increasing voltage and then using the ultraviolet viewer observed the entire partial discharge evolution process on insulator surface. Meanwhile,analyzed the average amplitude and time interval of partial discharge. The results show that:the severity of partial discharge caused by the immobilized metal particles in the insulator surface of the GIL can be classed into three levels: mild discharge,moderate discharge and severe discharge;as the discharge process intensified,the average amplitude and time interval of partial discharge followed the change. The statistical parameter Sk/Ku of average amplitude and time interval of partial discharge can be used to evaluate the severity of the defect caused by immobilized metal particles on DC GIL insulator surface.关键词
直流GIL/附着金属颗粒/局部放电/严重程度评估Key words
DC GIL/immobilized metal particles/partial discharge/severity assessment引用本文复制引用
李建波,高文胜,刘卫东..直流GIL绝缘子表面附着金属颗粒局部放电发展过程及严重程度评估[J].高压电器,2018,54(5):9-16,8.基金项目
国家重点基础研究发展计划项目(973计划)(2014CB239506-2).Project Supported by the National Basic Research Program(973 Program)(2014CB239506-2). （973计划）
