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1、200435thAnnualIEEEPowerElectronicsSpecialistsConferenceAachen,Germany,2004ANewPowerFlowControllerbasedonaBridgeConverterTopologyD.Soto,R.Pefla,F.GutierrezT.C.GreenUniversityofMagallanesImperialCollegePuntaArenas,ChileLondon,UKEmail:dsoto@ona.fi.umag.clEm
2、ail:t.green@ic.ac.ukshuntandseriesconverters,hasbeenproposed.TheconceptAbsfrac-ThispaperproposesanewACIACconverterofusingnetworksofreactiveelementssuchasIIorTtopologywhicheliminatestheneedofback-to-backtopologiesnetworks,thoughnotbasedonconvertertechnolo
3、gy,hasinFACTScontrollersthatexchangesactivepowerwiththealsobeenaddressedin[5].Both[3]and[4]reportedthat,inline.UnlikedirectACIACconverters,theproposedconvertercomparisonwiththestandardUPFC,theseries-parallelisbasedontheuseofanetworkofvariableimpedances(e
4、itherarrangecancompensateoveramuchrestrictedoperationcapacitiveorinductive)whichareimplementedbyconvertersregion(iftheoverallconverterratingsistobekeptactingasreactivecompensationunits.Abridgeconfigurationcanimplementafullycontrollablevoltagesourcewhichi
5、spractical).suitedtocontrolboththeactiveandreactivepowerflowinaInthispaper,aconverterwhichcomprisesfourconverterline.TheprincipleofoperationofthisACIACbridgeconvertermodulesarrangedinabridgetopology,Fig.1,isproposed.topologyisexplainedindetailandasuitabl
6、econtrolstrategyThistopologyisabletoproduceafullycontrollableoutputforthecontroloftheoutputvoltageisdeveloped.Experimentalvoltage(bothinmagnitudeandangle)independentoftheresultsfromalowpowerprototypevalidatetheproposalsandoutputcurrent,thusovercomingthel
7、imitationsof[3]anddemonstrateitseffectivenesstocontroltheflowofactiveand[4].TheconceptofAUACbridgetopologyproposedhere,reactivepowerinaline.thoughoriginatedbasedonadifferentapproach,issimilartothatintroducedin[6]forasingle-phase,matrix-lieAClACconvertert
8、opologyforlocomotives.In[6],each1.INTRODUCTIONcascadeconvertermodulethatformsthebridgecanbeTheuseofFACTSispotentialtoovercome,oratleastregardedasanewtypeofconvertervalve,arrangedinthisreduce,thelimitationsofexistingtransmi
