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ID:33005423
大小:1.48 MB
页数:59页
时间:2019-02-19
《地铁车辆受电弓-接触网系统离线电弧模型分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、StudyonTheArcModelofContact-lossinSubwayPantograph-OCSsystemABSTRACTTheSubwayvehiclegetenergyusedtocarrythroughrunningequipmentinthevehicleandvehicleoperatingbytheslidingelectricalcontactbetweenskatewhichisfixedonthephenomenonandthelineofcontactwhensubwayvehiclerunning.Thestabilityofcurrentcollect
2、ionbetweenthepantographandcatenaryhasanimportanteffecttovehicle’snormaloperation,itdecidesifthevehiclecanrunningsafeandstable.Duringsubwayvehiclerunning,pantographwillbedivorcedfromcontactlineforsuchreasonashittinghardpoint,passingneutralsection,heightchangingofcontactline.Ifvoltagebreakdownthegap
3、causedbytheseparationofpantographandcontactline,thearcwillappear.Thearccausedbycontact-lossofpantographwouldreducethequalityofcurrentcollectionofsubwayvehicleandalsoproducetheharmonic.Thehighorderharmoniccausedbyarcwouldgenerateaphenomenonwhatiscalledovervoltage.Theovervoltagephenomenonwilldodamag
4、etothewholetractivepowersupplysystem.Andthemacro-energyandhightemperatureheatquantityreleasedbythearcwoulddodamagetothevehicleandtheskatewhichisfixedonthephenomenonandthelineofcontact,thesewillreducethelifelengthofequipment.Nowadays,theresearchaboutcontact-lossarcisalwaysfocusingondevelopingthecon
5、tact-losscheckingtechnologyandtheovervoltageorelectromagneticinterference.Theresearchaboutcontact-lossarcitselfisveryseldom.Firstresearchthearctheory,analyzingthecharacteristicandthestructureofarc,studyingonthetheoryofACarcextinguishingandnearcathodeeffect.Thenresearchthedamagetocontactterminalsca
6、usedbyarc,themovingcharacteristicsofarc,energybalanceinthepolesofarcbyanalysisthetheoryofarcandelectriccontact.Analyzetheactualprocessofsubwayvehiclerunningtoresearchtheproducemechanismandthecharacteristicofcontact-lossarc.Analysesexistingarcmodelandtheenergychangingofcontact-lossarc,thenestablish
7、thecontact-lossarcmodelbasedonthetheoryofconservationofenergy.Becauseitishardtocollectreal-timedataonthesubwayvehicleII万方数据duringthevehiclerunning,usetheentitygraphofthepantographcomprehensivetesting-bedintegralc
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