550kV快速真空断路器的设计与试验邓吉勇1,张建凯1,严伟2,王智勇1,吕玮2,陈羽2,李德召1(1.常州博瑞电力自动化设备有限公司,江苏常州213025;2.南京南瑞继保电气有限公司,南京211102)摘要:文中基于多断口串联技术,提出了气体绝缘罐式550kV快速真空断路器。首先介绍了550kV快速真空断路器的拓扑和结构方案,然后针对绝缘和温升开展仿真计算,以校核结构设计的合理性,最后通过绝缘和温升试验验证产品性能。仿真结果表明,所有断口处于合位时,最大场强在快速开关进出线处的屏蔽罩上,为19.5kV/mm,所有断口处于分位时,最大场强在真空灭弧室静触头端面处,为18.9kV/mm,各部分场强均符合场强设计基准;根据温升场分布,最高温升在真空灭弧室动静触头接触处,为50.8K。此外,样机通过了对地和端间绝缘试验,单断口罐体的温升试验结果与仿真计算值最大偏差小于4K,结果符合标准要求。关键词:快速真空断路器;多断口;罐式;绝缘;温升DesignandTestof550kVFastVacuumCircuitBreakerDENGJiyong1,ZHANGJiankai1,YANWei2,WANGZhiyong1,LYUWei2,CHENYu2,LIDezhao1(1.NRElectricPowerElectronicsCo.,Ltd.,JiangsuChangzhou213025,China;2.NRElectricCo.,Ltd.,Nanjing211102,China)Abstract:550kVdeadtankfastvacuumcircuitbreakerbasedonmultiplebreakseriestechnologyisproposedinthispaper.First,thetopologyandstructureof550kVfastvacuumcircuitbreakerisintroduced.Then,simulationcal⁃culationofinsulationandtemperatureriseiscarriedoutinordertochecktherationalityofstructuraldesign.Atlast,theperformanceoftheproductisverifiedbyinsulationandtemperaturerisetests.Thesimulationresultsshowthat,withallthecontactsbeingclosed,themaximumelectricfieldintensity,whichis19.5kV/mm,isontheshieldattheincomingandoutgoingofthefastswitch.While,withallthecontactsbeingopened,themaximumfieldintensity,whichis18.9kV/mm,isontheendsurfaceofstaticconductiverodofthevacuuminterrupter.Theelectricfieldin⁃tensityofallpartsareinlinewiththeelectricfieldintensitydesigncriteria.Accordingtothetemperaturerisefielddistribution,themaximumtemperaturerise,whichis50.8K,isatthecontactofmovingandstationarycontactofthevacuuminterrupter.Inaddition,theprototypepassedthetestofinsulat...