Thesis - Interconnection of Direct-drive Wind Turbines Using

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1、InterconnectionofDirect-DriveWindTurbinesUsingaSeriesConnectedDCGridbyEtienneVeilleuxAthesissubmittedinconformitywiththerequirementsforthedegreeofMasterofAppliedScienceGraduateDepartmentofElectricalandComputerEngineeringUniversityofTorontocCopyrightbyE

2、tienneVeilleux2009AbstractInterconnectionofDirect-DriveWindTurbinesUsingaSeriesConnectedDCGridEtienneVeilleuxMasterofAppliedScienceGraduateDepartmentofElectricalandComputerEngineeringUniversityofToronto2009ThisthesispresentstheconceptofadistributedHVD

3、Cconverter"foroshorewindfarms.Theproposedconvertertopologyallowsseriesinterconnectionofwindturbinesobvi-atingthenecessityoftransformersandanoshoreplatform.Eachwindturbineisequippedwitha5MWpermanent-magnetsynchronousgeneratorandanac-dc-dcconverter.The

4、con-vertertopologyisadioderectier(ac-dc)cascadedwithasingle-switchstep-downconverter(dc-dc).Thedc-dcstageallowsthecurrentto owatalltimesinthedclinkwhileregulatinggeneratortorque.Thereceivingendisequippedwithaconventionalthyristor-basedHVDCconverter.Th

5、einverterstationislocatedonshoreanditregulatesthedclinkcurrenttobeconstant.StabilityofthecongurationandindependentoperationofthewindturbinesarevalidatedthroughsimulationsusingthePSCAD/EMTDCsoftwarepackage.Protectionforsomekeydcfaultscenariosarediscuss

6、edandapossibleprotectionstrategyisproposed.iiResumeInterconnectionofDirect-DriveWindTurbinesUsingaSeriesConnectedDCGridEtienneVeilleuxMasterofAppliedScienceGraduateDepartmentofElectricalandComputerEngineeringUniversityofToronto2009Cettethesepresen

7、teleconceptd'unedistributiondeconvertisseursacourantcontinuahautetensionpourunparceolieninstalleenmer.Latopologieduconvertisseurproposeepermetl'interconnexionenseriedeseolienneseliminantainsilebesoindetransformateursetdeplateformesenmer.Chaque

8、eolienneestequipeed'unalternateursynchroneaaimantspermanentsde5MWetd'unconvertisseurca-cc-cc.L'arrangementduconvertisseurconsisteenunpontredresseuradiodes(ca-cc)relieaunconvertisseurabaisseur(cc-cc).Ceconver-tisseurcc-ccpermetauco