全并联供电方式分析与设计

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1、AbstractAtpresent，ATfeedingsystemanddirectfeedingsystemarethemainstyleoftherailwayinChina．ATfeedingsystemhasadvantagesinhighqualityofpowersupply，smallimpedanceoftractionandlongdistanceofpowersupplyandSOon．Butalotoftractionsubstationfacilitiesandmissivecivilengineer

2、ing，operationandmaintenancearealsomoredifficult．Theimpedanceofdirectfeedingsystemisgreatandthedistanceisshort．Itcannottakefulladvantageofthepowersystemshort-circuitcapacityadvantage．Inordertoimprovetheshortcomingsoftwofeedingsystem，itisproposedtostrengthenthelinewi

3、thallparallelpowersupply．Thefeedingsysteminforeignisintroducedinthispaper．Directfeedingsystemwithreturnconductor,thesimplefeedingsystem谢tllrailretum，boostertransformer淅tllretumconductor,autotransformerfeedingsystemandcoaxialcablefeedingsystemareadaptedinourcountry．

4、Theexcellenceandshortcomingofeveryfeedingsystemareanalyzedinthispaper．Theprincipleofallparallelfeedingsystemisdetailintroducedinthispaper．ThewireconfigurationandparallelmodeimpactingonresistanceandvoltageofOCSofallparalleltractionsystemareresearched．Therelationbetw

5、eenlinefeederandretumwiregeometricallocationandimpendenceoftractivenetwork，returnnetworkparallelingandselectingparallelpointofallparallelfeedingsystemareanalyzed．Thecurrentdistribution，voltagelevelandshortcircuitimpedancearededuced．Therailpotentialandlineofcommunic

6、ationinterferingofallparallelfeedingsystemarecalculatedandanalyzed．ByHarbin-Dalianrailwayelectrificationprojectthetechnicalandeconomicofthreefeedingsystemarecompared．Theprocessoffeedingsystemselectedandspecificimplementationisintroduced，aswellasadvantagesandcharact

7、eristicsareverifiedbysimulationandactualoperatingTheparallelfeedingsystemispromotedinmountainelectrifiedrailway．ForexampleasShenshuocapacityexpansion，combinedwiththecharacteristicsofmountainrailwayelectrification，theadvantagesoftheparallelfeedingsystemisanalyzed．Ke

8、yWords：auto—transformerfeedingsystem；boostertransformerfeedingsystem；directfeedingsystem而threturnconductor；allparallelfeedingsystem，railpotential