干式SF_6气体绝缘换流变压器阀_省略_电流致热型放电故障分析及现场修复_周安春

第42卷第5期电网技术Vol.42No.52018年5月PowerSystemTechnologyMay2018文章编号：1000-3673（2018）05-1401-09中图分类号：TM85文献标志码：A学科代码：470·40干式SF6气体绝缘换流变压器阀侧套管电流致热型放电故障分析及现场修复周安春1，高理迎1，冀肖彤1，张民1，汤浩2（1．国家电网有限公司，北京市西城区100031；2．中国电力科学研究院有限公司，北京市海淀区100192）AnalysisandField-RepairofCurrentOverheatingFaultsonDryTypeSF6Gas-InsulatedValveSideBushinginConverterTransformerZHOUAnchun1,GAOLiying1,JIXiaotong1,ZHANGMin1,TANGHao2(1.StateGridCorporationofChina,XichengDistrict,Beijing100031,China;2.ChinaElectricPowerResearchInstitute,HaidianDistrict,Beijing100192,China)1ABSTRACT:Inordertoanalyzeanddiagnoseinternaldischargefailureoftwo±500kVSF6gas-insulatedvalvesidebushingsinconvertertransformers,insulationcharacteristicsbeforeandafterthedischargeandinternalcharacteristicsafterdisassemblyaretestedandchecked.Temperaturedistributionofcurrent-carryingconductorandinsulatoraresimulatedwithfiniteelementmethod.DCresistanceofconductor,contentofSF6decompositionproducts,temperaturecalculationresults,overheatinganddischargetracesshowthatbush