地铁车辆受电弓-接触网系统离线电弧模型分析

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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