资源描述：
《带z型冷却通道的油浸式变压器绕组传热实验和模拟论文》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、带Z型冷却通道的油浸式变压器绕组传热实验和模拟毕业论文外文正文1.IntroductionElectrictransformerisakeycomponentinthetransmissionanddistributionofelectricalenergy.Thereliability,lifetime,performanceanddesignoftransformersareintimatelyrelatedtoandaffectedbytheformationandtemperatureofthehottestspotinthetransfo
2、rmerwindingdisks.Duetotherequirementinsecurityandreliability,theapplicationofmineraloilasadielectricandcoolantisbecomingincreasinglyimportanttotransformerperformance.Consequently,investigationforthehottestspotinoiltransformerwindingshasattractedparticularattentionfrombothmanuf
3、acturersandusersectors.Accordingly,IEEEStandardC57.12.00-2000requiresthatthehottestspottemperatureanditslocationbedeterminedbyeithermeasurementorcalculationmethod.Thedeterminationofthehottestspotlocationandtemperaturebymeasurementisadauntingtaskforworkingtransformersbecauseoft
4、heexpense,effortanddifficultyinvolved.Fromthegeometricalconstructions,transformerwindingscanbeclassifiedintotwobasicforms,layeranddisktype.Thedisk-typewindingwithzigzagcoolingductarrangementismorepopularinpractice,butadifficultyarisesinhydraulicandthermalpredictivecalculations
5、duetocomplexoilfluidflowpathsinit.Thepresentstudyisfocusedonthepredictionofthehottestspottemperatureinthistypeoftransformerwindings.Inoiltransformer,thecoolingoilisinpracticeheatedinwindingdisksandcooledinradiators,andaveragewindingtemperatureismainlydeterminedwithoilcirculati
6、onconditionandtemperaturelevel.Inforcedoil-cooledtransformer,theoilcirculationconditionandhencecoolingcapacityismainlyaffected(suchasOF,theoilispumpedthroughthetransformer,withnaturaloilcirculationinthewindings),anddetermined(suchasOD,theoilispumpedandforcedthroughthewindings)
7、,byoilpumpinthecirculationloop,butinappropriateflowdistributionacrossthehorizontalductsmaycausealocaloverheatinginthewindings.Asaresult,thecouplingbetweenfluidflowandheattransferinthewindingsmustbetakenintoconsiderationfortheaccuratepredictionofthehottestspottemperatureinmagni
8、tudeandlocation.Withnoapplicationofoilpump,naturaloilcooling(
