变压器真空注油工艺--AREVA

AREVAShanghaiTransformerCo.,Ltd.上海AREVA变压器有限公司PROCESSSPECIFICATION工艺规范:APPLICATIONOFVACUUMANDOILFILLINGASTPS47005C真空注油工艺Page:1/9页数：真空注油工艺ApplicationofVacuumandOilFilling1总则General2设备和工具Equipmentandtools3准备Preparation4工艺过程Procedure5静放时间规定RestingDuration6变压器油要求OilRequirementAuthor:YangxinglongSignature:编制：杨兴隆签字：Approvedby:QianHuichunSignature:审核：钱辉春签字：Authorised:LiujianhuaSignature:批准：刘建华签字：Issuedby发布Supersedes替代Date日期Name姓名Signature签字ASTPS47005BAREVAShanghaiTransformerCo.,Ltd.上海AREVA变压器有限公司PROCESSSPECIFICATION工艺规范:APPLICATIONOFVACUUMANDOILFILLINGASTPS47005C真空注油工艺Page:2/9页数：1总则General本工艺适用于上海阿海珐变压器公司35kV（不包含接地变压器）及以上变压器抽真空注油过程和各阶段变压器油样标准。Thisprocessspecificationdescribesapplicationofvacuumandoilfillingfor35kVandabovetransformer(excludingearthlingtransformer),italsoincludestheoilrequirementindifferentphases.2设备和工具Equipmentandtools2.1真空机组Vacuumsystem2.2数显真空表Digitalindicatingvacuumgauge2.3真空连管Vacuumpipe2.4真空注油管Oilfeedingpipe2.5扳手,法兰,梯子,安全带等Spanner,flange,ladder,safetybeltetc.3准备Preparation3.1将真空连管连接到油枕顶部或瓦斯继电器接口处,并检查密封，确保不漏气。Connectconservatororgasrelaywithvacuumpipesandcheckforleakage.3.2抽主体时真空连管直径应尽量大（至少为50mm)。Theinternaldiameterofvacuumpipeshallbeneverlessthan50mm.3.3查明油箱及油枕所能承受的真空度（若无特殊说明所有35kV及以上变压器的油箱和油枕均可承受全真空）。Checkthelevelofvacuumtankandconservatorareabletowithstand.(All35kVandabovetransformertankandconservatorareabletowithstandfullvacuumunlessotherwisestated.)3.4检查变压器上各个阀门的开关是否处于要求的位置。Checkthestateofallvalves.3.5检查真空机组电,水,气供应正常。Checkthatelectricity,waterandgassupplyareOK.3.6检查变压器油箱和有载开关上联接开关储油柜的法兰兰已经联通。Checktherehavebeenapipebetweentransformerandtheflangeontopchangerforconductingtopchangertotopchangerconservator4工艺过程Procedure4.1启动真空机组抽真空,并记录起始时间。AREVAShanghaiTransformerCo.,Ltd.上海AREVA变压器有限公司PROCESSSPECIFICATION工艺规范:APPLICATIONOFVACUUMANDOILFILLINGASTPS47005C真空注油工艺Page:3/9页数：Activatethevacuumsystemandrecordstartingtime.4.2抽真空的昀初10分钟初步检查油箱及管路有无明显泄漏。Givethetankandpipespreliminarycheckforapparentleakageininitialtenminutesafterapplyingvacuum.4.3查看油箱是否变形,并及时处理。Checkthatthetankisfreeofdeformation.Ifanydeformation,thetankshallberepairedassoonaspossible4.4抽真空到0.6mbar时停止抽真空，关闭机组与油箱之间的阀门试漏，停机10分钟后记录第一次压力P1，再过60分种记录第二次压力P2，以设计的总油量作为容积V，按下面公式计算泄漏率L，要求≤20mbar.L/s，否则重新检漏：Whenthevacuumreaches0.6mbar,stopvacuum.Closethevalvebetweenvacuumsystemandtank,waitfor10minutes,thenrecordpressure(P1).After60minutes,recordpressure(P2).CalculatetheleakagerateL,whichshallbe≤20mbar.L/s.L=Vx(P2-P1)/3600WhereV:totaloilamountaccordingtodesignspecificationWhenLismorethan20mbar.L/s,trytolocateleakagepoints.4.5首次注油前要求：Thefollowingconditionsmustbemetbeforeinitialoilfilling:500kV220kV110kV35kV1）真空度（mbar）≤0.3≤0.3≤0.3≤0.4Vacuum2）≤1mbar保持时间(h)≥48≥36≥30≥24Duration3）注油速度(L/h)≤2000≤2000≤20003000Oilfillingspeed注油速度仅供参考，关键控制注油过程中始终保持油箱内真空压力≤1mbarTheoilfillingspeedonlyforconsult,thekeypointistocontrolthevacuuminsidethetankshallremainlessthan1mbar.4.6注进变压器之前的油温度控制在60-75度,油样要求见油样标准。Theoilcannotbefilledintothetransformeruntilthetemperatureofoilreachesbetween60-75℃.Forqualityofoilsample,refertorelevantstandard.4.7注油过程中始终保持油箱内真空压力≤1mbar，否则应暂停注油。AREVAShanghaiTransformerCo.,Ltd.上海AREVA变压器有限公司PROCESSSPECIFICATION工艺规范:APPLICATIONOFVACUUMANDOILFILLINGASTPS47005C真空注油工艺Page:4/9页数：Whenoilfilling,thevacuuminsidethetankshallremainlessthan1mbar.Otherwisestopfillingoil4.14.8若从油枕顶部抽真空,油位一直注到油枕油表的1/22/3，但是破空后油位应保证在当时油箱内油温相对应的位置。Ifvacuumisappliedtothetransformeratthetopofconservator,filloiluntilconservatoroilgaugereaches1/2-2/3,theoilshouldreachedthelevelwhichisrelativewithoiltemperatureafteraerating.4.24.9若从主体瓦斯继电器接口抽真空,油位注到距离箱沿100−150mm处,油位尽量高(淹没昀高位的绝缘件）,以不抽出变压器油为限。Ifvacuumisappliedtothetransformerthroughmaintankgasrelay,filloiltothelevel100-150mmlowerthantankflange.Makesureinsulationpartsarefullyimmersedinoil.4.10注完油后继续抽真空至少2小时,停机并保持到装配附件时为止。Afteroilfilling,continueapplyingvacuum.Aftervacuumisappliedfor2hours,stopPumpandkeepvacuumtillassemblyaccessories.4.34.11装附件后补加油,从主体呼吸器处抽真空,220kV及以上要求真空≤2mbar，110kV及以下要求真空≤10mbar,从上部注油阀补加油（若无此阀可从散热器上部阀门注油）。Afteraccessoriesarefitted,applyvacuumthroughmainbreather(220kVandabove:vacuum≤2mbar;110kVandbelow:vacuum≤10mbar).Whenthevacuumreachesrequiredpressure,filloilthroughoilfillingvalveatthetop.(Ifnooilfillingvalve,filloilthroughthevalveatthetopofradiator.)4.44.12油枕抽真空前必须打开油枕顶部的小阀门,保持胶囊内外压力平衡，破空时从主体呼吸器处缓慢进行,防止胶囊破裂。Ifvacuumisappliedtothetransformerwithconservatorfitted,thesmallvalveatthetopofconservatormustbeopenedtoequalizethepressureinsideandoutsiderubberbag.Releasevacuumslowlythroughbreathertoavoidrubberbreaking.4.13因开关油量少,注油时流量建议调节在1000升/小时以下。Duetothefactthattapchangeronlyrequiressmallamountofoil,theflowrateshallbecontrolledtobelow1000L/hwhenfillingoilintothetapchanger.AREVAShanghaiTransformerCo.,Ltd.上海AREVA变压器有限公司PROCESSSPECIFICATION工艺规范:APPLICATIONOFVACUUMANDOILFILLINGASTPS47005C真空注油工艺Page:5/9页数：4.54.14对于220kV及以上变压器注完油后应立即对主体进行循环滤油，上进下出以昀快的速度滤4.5油，油温控制在65~75度，循环滤油3遍，滤油时有条件应加装呼吸器。For220kVandabovetransformer,themaintankshallbeoilcirculatedimmediatelyafteroilfilling.Whencirculatingoil,theoiltemperatureshallbecontrolledat65~75℃ando