A vector controlled current source PWM rectifier with a novel current damping method

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1、464IEEETRANSACTIONSONPOWERELECTRONICS,VOL.15,NO.3,MAY2000AVectorControlledCurrent-SourcePWMRectifierwithaNovelCurrentDampingMethodMikaSaloandHeikkiTuusaAbstract—Three-phasecurrent-typepulsewidthmodulationrentsdrawnbythefilter.Severalmethodshavebeenreported(PWM)rectifiersarebecomingincreasinglypopul

2、arasthe[1]–[4],[7]tocompensatethesecapacitivecurrents.However,front-endconverterunitinpowerelectronicsystemsduetotighterthesemethodsareusuallycomplexorneedexcessivehardware.electromagneticcompatibility(EMC)regulations.InthispaperIntransientconditions,theLCfiltermaycauseoscillationsinthecontrolofthe

3、currentsourcePWMrectifierinthesynchro-nouslyrotatingreferenceframeisdiscussed.Acontrolsystemissupplycurrentsduetotheresonance.Theamplitudeandthedu-presentedinwhichtheactiveandreactivepowerareindepen-rationoftheoscillationsaredependentonthefilterparameters.dentlycontrolledwithrealandimaginaryaxiscom

4、ponentsoftheWhenafilterresistanceislargetheoscillationsdieoutquicklysupplycurrentvector.Anewdampingmethodforsupplycurrentbutthepowerlossesarehigh.Thustheconventionaldampingoscillationsisintroduced.Themethodoperatesinanopen-loopresistorisnotapracticalsolution.mannerandisverysuitableformicrocontrolle

5、rimplementationsincethecalculationpowerdemandislow.Furthermore,itisSeveralmethodshavebeenproposed[4]–[6]todamptheshownthatinthesynchronouslyrotatingcoordinates,wherethesupplycurrentoscillationsintransientconditions.Mostso-sinusoidalvariablesappearasdcquantities,thecompensationlutionsrecommendclosed

6、-loopcontrolofinputlinecurrentsofthereactivepowerdrawnbythesupplyfiltercanbedoneor/andthevoltageacrossthefilterchoke.Microcontrollerim-veryeasily.Theproposedcontrolmethodsarerealizedusingasingle-chipMotorolaMC68HC916Y1microcontroller.Theplementation,however,requiresexcessivecalculationcapacity.expe

7、rimentaltestsshowexcellentperformanceinbothsteadyAlso,thesupplyfilterparameterscannotbefreelychosenstateandtransientconditions.toobtaintheoptimalfilterconstructionbuttheresonanceIndexTerms—Current-sourcerec