气体绝缘开关内部固体绝缘件缺陷产气特性  

Gas Generation Characteristics for Solid Insulation Defects in the Gas Insulated Switchgear

作　　者：沙彦超[1,2] 蔡巍[1,2] 李大卫[1,2] 李志刚[1,2] 徐党国[1,2] 龙凯华[1,2] 

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]国网冀北电力科学研究院有限责任公司,北京100045

出　　处：《高电压技术》2017年第1期256-265,共10页High Voltage Engineering

基　　金：国家电网公司科技项目(8KE000M13008)~~

摘　　要：为了研究固体绝缘件是否参与放电、加压时间、电极材料等因素对SF6分解气体组分及产气速率的影响,采用脉冲电流法测量GIS设备内不同绝缘缺陷在相同累积局部放电量下240 h内产气特性变化规律,分析了不同绝缘缺陷分解产物φ(SOF2+SO2)/φ(SO2F2)、φ(CO2+CO)/φ(CF4)和φ(CF4+CO+CO2)/φ(SOF2+SO2+SO2F2)3组组分体积分数比值的数值特征。研究结果表明:电极材料影响到CO2、CO的生成量,相同缺陷类型时,铁电极CO2、CO产气量大于铜电极材料;当放电涉及到固体绝缘时,无论电极材料是铁丝或是铜丝,其φ(SOF2+SO2)/φ(SO2F2)的值均高于母线电晕放电缺陷;φ(CO2+CO)/φ(CF4)的范围一般均在2~5之间;φ(CF4+CO+CO2)/φ(SOF2+SO2+SO2F2)的值均低于母线电晕放电缺陷。In order to study the influences of solid insulation, stressing time, and electrode materials on content and pro- duction rate of SF6 decomposition products, the partial discharge damage tests through impulse current method were performed for 240 hours to measure the gas generation characteristics with the same accumulated PD quantity. The rela- tion among φ（SOF2＋SO2）/φ（SO2F2）, φ（CO2＋CO）/φ（CF4）, and φ（CF4＋CO＋CO2）/φ（SOF2＋SO2＋SO2F2） was used to analyze the defect types. The results indicate that the CO2 and CO are affected by electrode materials. The yields of CO2 and CO with iron electrode are larger than those with copper electrode in the same defect types. When the solid insulation is involved in the discharge, whatever the electrode material is iron or copper, the value of φ（SOF2＋SO2）/φ（SO2F2） is higher than that under corona discharge. The range of φ（SOF2＋SO2）/φ（SO2F2） is 2 to 5 generally. The value of φ（CFa＋CO＋CO2）/~o（SOF2＋SO2＋SO2F2） is lower than that under corona discharge.

关 键 词：SF6高压开关设备 固体绝缘件缺陷 电极材料 产气规律 三比值法 故障诊断方法 

分 类 号：TM595[电气工程—电器]