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1、BULLETINOFTHEPOLISHACADEMYOFSCIENCESTECHNICALSCIENCESVol.57,No.4,2009AbidirectionalDC-DCconverterforrenewableenergysystemsS.JALBRZYKOWSKI?,andT.CITKOFacultyofElectricalEngineering,BialystokTechnicalUniversity,45DWiejskaSt.,15-351Bia?ystok,PolandAbstract.Toimpr
2、ovetheenergyquality,mostoftherenewableenergysystemsincludeanenergystorageelementchargedbythebidirectionalDC-DCconverter.ThispaperproposesthebidirectionalDC-DCconverterwhichemploysthetwobridgecon?gurationresonantclass-Econvertersonthebothsidesoftheisolatingtran
3、sformer.Thelowsideconverteriscontrolledasstepupandthehighsideconverteriscontrolledasstepdown.Theproposedsystemischaracterizedbygooddynamicpropertiesandhighe?ciencybecausetheconvertertransistorsareswitchedinZVSconditions.Atheoreticalanalysistoproviderelationsfo
4、rsystemdesign,andthelaboratorymodelinvestigationstovalidatethesystemcharacteristicaregiveninthepaper.Keywords:bidirectional,isolated,energystoragesystem,DC-DCconverter.1.Introductionformerleakageinductancecanbeusedasausefulelementintheresonantconverters[9].Int
5、hepaper[10]abridgecon?gu-Theessentialpartoftherenewableenergysystemisastoragerationclass-Ebuckresonantconverterisproposed.Thebridgeelement[1–6].Thestorageelementgatherstheenergy?uctu-con?gurationclass-Eboostresonantconverterwasproposedationsandenablestoimprove
6、thesystemdynamicproperties.in[11].Theclass-EconvertersguaranteeZVSswitchingcon-Achemicalbatteryorasupercapacitor,usedasatypicalditionsforconvertertransistorsinthewholeoperatingrangeenergystorageelement,arecharacterizedbythelownom-andapartfromthatdonotgeneratet
7、heparasiticoscillationsinalDCvoltagevalue.Tochargeanddischargethestoragewhichinvokethevoltagespikes.Onthebasisofbothclass-element,thebidirectionalDC-DCconverterisused.TheDC-Econvertersmentionedaboveabidirectionalclass-EDC/DCDCconverteroftenensuresanelectricali
8、solationbetweenconverterisdiscussed.lowvoltageandhighvoltagepartsofthesystem,andthenthetransformerisused.InordertofeedthetransformeraDCpowermustbeconvertedintoACpowerandnextrecti?e
