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1、AFrequencyDomainAnalyticalModelofUncontrolledRectifiersMinChen,ZhaomingQianXiaoMingYuanZhiyongQiuCollegeofElectricalEngineering,GE(China)ResearchandDevelopmentPowerofEastChinaDispatchandZhejiangUniversity,Hangzhou,ChinaCenterCo.Ltd.,Shanghai,ChinaExchangeCentre,Shanghai,200002Email:calim@zju.
2、edu.cnEmail:Xiaoming.Yuan@geahk.ge.comEmail:ep_qzy@ec.sp.com.cnAbstract—Thispaperproposedanaccurateanalyticalresultsoftime-domainsimulation.Therefore,choiceofmethodtocalculatethecurrentharmoniccomponentsofpowercompensationstrategies,aswellasdesignofuncontrolledrectifiers.Theseanalysesaregreat
3、lycompensationsystemscanbeoptimizedwiththeseaccuratesimplifiedthroughsuperpositionmethod.Alltheestimatedharmoniccurrents.Anditcanalsobeusedinthecalculationsarepurelyalgebraic,withhighaccuracy.controllerdesignfortheinvertersystemspoweringrectifierThevalidityoftheproposedmethodisdemonstratedbyl
4、oads.comparisonwiththeresultsoftime-domainsimulation.Therefore,choiceofpowercompensationstrategies,asII.HARMONICCALCULATIONFORSINGLEwellasdesignofcompensationsystemscanbeoptimizedPHASERECTIFIERwiththeseaccurateestimatedharmoniccurrents.AnditcanalsobeusedinthecontrollerdesignfortheinverterWewi
5、llusethesingle-phaserectifiertodemonstratesystemspoweringrectifierloads.theprincipeoftheproposedanalyticalmethod,andthenextendittothethreephaseconditions.Fig.1illustratestheprimaryDCsidewaveformincontinuousmode,asinductorI.INTRODUCTIONcurrentIL,inductorvoltageVL,rectifieroutputvoltageVdcandca
6、pacitorvoltageVcofsingle-phaserectifierinNonlinearloadssuchassinglephaseandthreephasecontinuousmode.Thedeepanalysesandexpressionsofallrectifiersformalargepartofpresentelectricalloads.Thethesewaveformshavebeenperformedin[6].Toderivetheharmoniccurrentstheserectifiersproduceflowinthepoweranalyti
7、calexpressionsforaccurrent,wehavetoremovethesystemsandcanhavedetrimentaleffects.Inthissituation,rectifierbridgefirstandtransferdc-sidevariablestoitsacpassivefiltersareacommonsolutionforcompensationequivalentac-sidecounterparts.Fig.2illustrate
