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1、IEEETRANSACTIONSONPOWERDELIVERY,VOL.19,NO.2,APRIL2004813CompensationSchemesforaSCRConverterinVariableSpeedWindPowerSystemsZ.Chen,SeniorMember,IEEEAbstract—Thispaperpresentstheperformancestudyofsev-eralcompensationschemesforaline-commutatedSCRconverteroperatingunderawiderangeofdcvoltage.Thestudi
2、edreactivepowerandharmoniccompensationschemesincludepassivefil-ters,activefilters,andhybridcompensationmethodsforaSCRinterfacedpermanentmagnetgeneratorbasedvariablespeedwindturbine.Theeffectivenessofthecompensationschemeshasbeeninvestigatedintermsofreactivepowerandharmonics.Therequiredcompensat
3、ioncurrentratingsoftheseschemesarepresented.Theeffectsofhigherpulsenumberoftheconverteronthecompensationschemesarealsoconsidered.Fig.1.SchematicofSCRconverterinterfacedwindpowersystem.IndexTerms—Compensator,filters,powersystemharmonics,reactivepower,thyristorconverter,windpowergeneration.I.INTR
4、ODUCTIONORTHELASTfewdecades,phase-anglecontrolled,Fline-commutatedthyristorconverters(SCRconverters)havebeenusedinhigh-voltagedirectcurrent(HVDC)trans-missionsystems[1],[2].Thyristorsstillhavehigherpowercapacitythanthenewlydevelopedsemiconductordevices.Thyristorconvertersareamaturetechnologyand
5、areproventobereliableandeconomical.Butthereactivepowerandharmoniccurrentassociatedwiththyristorconvertersrequiresacompensationsystemtomeetgridconnectionrequirements.EspeciallywhereSCRconvertersarerequiredtooperateoverFig.2.Idealdcpower,voltage,andcurrentversusgeneratorspeed.awiderangeofthedclin
6、kvoltage,suchasinavariable-speedwindpowersystem[3],thereactivepowerandharmonicsvaryII.REACTIVEPOWERANDHARMONICCHARACTERISTICSOFoveragreatrange,whichdemandsaneffectivecompensationTHESTUDIEDSCRCONVERTERsystem.Asimplifiedcircuitdiagramofavariable-speeddirectdriveThispaperpresentsastudyofvariouscom
7、pensationschemespermanentmagnetgeneratorbasedwindpowersystemisforaSCRconverteroperatingunderawiderangeofdcvoltage,illustratedinFig.1.Thevariablefrequencyacpowergeneratedincludingpassive,active,andhybridcompensationschemesfromthepe
