市域轨道交通牵引供电制式选择的若干问题分析

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1、万方数据西南交通大学硕士研究生学位论文第1lI页AbstractWiththegrowingurbanpopulationandtheincreasingurbanarea,theearlysuburbcommutingrailwaycannotsatisfythegrowthoftripdemand，SOtheformofregionalexpressrailtransitappeared．Airportfastroadlineisaspecialformofregionalrailtransit．Some

2、airportisfarawayfromdowntown,afterthetrampulledoutinthedenselypopulatedcity,theneedtospeedtotheairport，SOastoensurecompetitivecomparedwithotherformsoftransport．Thesepropertieshavespecialdemandsforthetractionpowersupplysystem．ThepowersupplymodesuchasAC25kVan

3、dDC1500Varewidelyusedindomestictractionpowersupplysystem．Bothofthemhavedeficiencieswhentheyareusedinregionalexpressrailtransit．Forexample，ACmoderequireslongersafetyinsulationdistance,andinDCmodethepowersupplyarmofonetractionsubstationisshort．Therefore，ithas

4、greatsignificanceinstudyingthechoiceoftractionpowersupplymodeforregionalrailtransit．AC25kVandDC1500Vtractionpowersupplysystemareadoptedindomesticrailtransit．andtherearethetransitlinecombinedwiththeexperienceofthetwoformatsinabroad．Inregionalrailtransitplann

5、inglineofDC，ACanddoublesystemthreekindoftractionpowersupplyscheme，thetextanalysisoftractionpowersupplysystemarediscussedfourrelatedfacmrs，theregionalplanninglineofeachkeytechnicalproblemsthatexistinthepowersupplyschemewereputforward．Thesisanalyzeskeyproblem

6、existinginpowersupplyschemeofregionalexpressrailline．DCmoderaillinerunsinalowspeed．ThesisanalyzesPantograph-catenaryarcingrelevantdatacollectedfromurbanrailwaysystemanddiscussesthattheimprovementofrunningvelocityintensifiesarcingpowerandinfluencesvehiclesaf

7、eoperation．Assimplechainsuspensioncmenaryandpantograph—catenarycouplingmotionmodelhasbeenbuilt，pantograph-catenarydynamiccontactstressCallbegeneratedthroughANSYSsimulateSottware．Thentheeffectofqualityofthepantographbeadtowardcontactpressureandqualityofcurre

8、nt—collectionwereanalyzed．Inaddition,theresultofcontactpressureandqualityofcurrent—collectionusingACandDCpantographinANSYSsimulatemodelwithspeedset嬲160km／hwerecompared．Accordingtothebasictheoryofcurren