高电压技术2017，Vol.43Issue(8)：2551-2557,7.DOI:10.13336/j.1003-6520.hve.20170731015
基于特征气体COS和CS2的GIS内环氧树脂固体介质绝缘状态监测
Insulation Condition Monitoring of Epoxy Resins Solid Dielectric in GIS Using Characteristic Gases COS and CS2
摘要
Abstract
To improve the accuracy of chemical diagnosis method used for estimating the insulation conditions of basin insulators and other epoxy resins solid dielectric in GIS,creeping discharge and related verification tests are set up to study the evolving law of SF6 decomposition products under typical discharge defects on a small apparatus.It is found that COS,as an important characteristic gas related to epoxy resins discharge,is produced under stronger discharge than CS2.B3P86/6-31G(d,p),a method of calculation based on quantum chemistry,is adopted to explore the generating mechanism and energy conditions of COS when partial discharges occur on the solid dielectric in GIS.Carbon which is a component of COS derives from basin insulators and other epoxy resin solid dielectric,and the reactions of intermediate HCS and O2 as well as CS2 and OH are two main pathways to generate COS.Experiments and theoretical calculations show that decomposed gas CS2 has a high sensitivity in judging whether the discharge is related to the epoxy resin solid dielectric,CS2 can be applied to diagnose faults related to creeping discharge on the epoxy resin.The generation of COS indicates that the discharge level on the epoxy spacer deepens,thus the decomposition products testing period should be shortened,and it is important to strengthen insulation monitoring of relevant GIS chamber.关键词
GIS/环氧树脂/固体绝缘/特征气体/COS/CS2Key words
GIS/epoxy resins/solid insulation/characteristic gas/COS/CS2引用本文复制引用
周文俊,乔胜亚,郑宇,程林,喻剑辉,覃兆宇..基于特征气体COS和CS2的GIS内环氧树脂固体介质绝缘状态监测[J].高电压技术,2017,43(8):2551-2557,7.基金项目
国家电网公司科技项目(2014-1192).Project supported by Science and Technology Project of SGCC (2014-1192). （2014-1192）
