气体绝缘开关设备内部固体绝缘件缺陷诊断技术  

Defect Diagnosis Technology for Solid Insulation in the Gas Insulated Switchgear

作　　者：沙彦超[1] 李大卫[1] 蔡巍[1] 李志刚[1] 袁亦超[1] 徐党国[1] 龙凯华[1] 孙云生 杨大伟 吴刚[1] 崔贺平[1] 

机构地区：[1]国网冀北电力有限公司电力科学研究院(华北电力科学研究院有限责任公司),北京100045 [2]国网冀北电力有限公司,北京100053

出　　处：《华北电力技术》2016年第1期6-11,共6页North China Electric Power

基　　金：国家电网公司科技项目<气体绝缘开关设备内部绝缘件缺陷诊断和混合气体分解产物检测技术研究>(8KE000M13008)

摘　　要：一直以来,SF6气体分解产物检测方法被认为是考核SF6高压开关设备绝缘性能、发现绝缘缺陷、预防绝缘击穿事故的有效手段之一,但目前对于SF6高压开关设备内固体绝缘件缺陷引起设备故障的诊断方法不明,相关标准、理论依据的研究明显缺乏。因此,通过脉冲电流法测量不同缺陷模型在相同局部放电量下240 h内产气特性变化规律,揭示了是否固体绝缘件参与放电、加压时间、电极材料等因素所引起SF6分解气体组分及含量的差异;基于ID3算法,选取c(SOF2+SO2)/c(SO2F2)、c(CO2+CO)/c(CF4)和c(CF4+CO+CO2)/c(SOF2+SO2+SO2F2)3组组分含量比值构建SF6高压开关设备故障识别决策树,实现了GIS设备内固体绝缘件缺陷的有效诊断。Detection method of decomposition products in sulfur hexafluoride electrical equipment has been consid- ered as the most effective measure to assess insulation properties of high voltage equipment, find insulation defects and prevent the dielectric breakdown. However,defect diagnosis technology for solid insulation in the gas insulated switchgear is always ignored. Furthermore,there is a marked absence of relevant standards and the theoretical basis. Therefore, in this paper, the partial discharge damage tests through impulse current method and the gas generation characteristics with the same PD quantity were performed for 240 hours. The influence of solid insulation, stressing time and electrode materials were discovered. Based on ID3 algorithm, c（SOF2＋SO2）/c（SO2F2）、c（CO2＋CO）/c（CF4）和c（CF4＋CO＋CO2）/c（SOF2＋SO2＋SO2F2） were used to build decision tree for assessing sulfur hexafluoride electrical equipment,which achieved effective defect diagnosis caused by solid insulation in GIS.

关 键 词：SF6高压开关设备 固体绝缘件缺陷 电晕放电 产气规律 故障诊断方法 

分 类 号：TM215[一般工业技术—材料科学与工程]