Low-voltage ride-through of a full converter generator.pdf

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1、Low-voltageride-throughofafullconverterwindturbinewithpermanentmagnetgeneratorJ.F.ConroyandR.WatsonAbstract:Thelow-voltageride-throughcapabilityofa2MWfullconverterwindturbinewithpermanentmagnetsynchronousgeneratorisinvestigatedherein.Adetaileddescripti

2、onofthesystem,itscontrolleroptionsanditsbehaviourwhensubjectedtoaseverevoltagedip,ispresented.Acontrolschemefortheturbinethatallowsittowithstandseverevoltagedipsisdesignedandsimulated.Thiscontrolschemeemphasisestheregulationofthedc-linkvoltageandminimi

3、sationofthedrivetraintorquesurplus.Also,thelevelofmodellingdetailrequiredforstabilityanalysisisanalysedanddiscussed.1Introductionincludeagearbox,reducingtherequirednumberofstatorpolepairs,makingthegeneratorlighterandsmaller.TheThenumberofwindturbinesco

4、nnectedtoelectricitynet-frequencyconverterusesapairofback-to-backPWMworksinEuropeisincreasingrapidly[1].Thesignificantvoltagesourceconverters,withanintermediatedccapaci-increaseinwindpowercapacityhasledtoconcernsabouttor.Fig.2isanillustrationofthissyste

5、m.powersystemstabilityaswindfarmsreplaceorareinstalledThefullconverterwindturbineisthemostflexiblewindinsteadofconventionalgeneratingtechnologiesthatuseturbinetechnologyfromanLVRTpointofview,asthefossilfuelsastheprimaryenergysource.Oneofthesecon-activea

6、ndreactivepoweroutputcanbecontrolledusingcernsistheissueoflow-voltageride-through(LVRT).theconverters.Thispaperanalysestheextentofitsflexi-Windturbinesarenowexpectedtobehavelikeconventionalbility.Amodelofthevariousphysicalcomponentsandsynchronousgenerat

7、orsduringvoltagedips,remainingcon-theircontrollersisdevelopedintheMatlab/Simulinksimu-nectedandsupplyingreactivepowerduringandafterthelationenvironment.voltagediphasended.Inthispaper,amethodisproposed,whichallowsthisGridcodespecificationsinEuropeancount

8、riesnowwindturbinetechnologytoremainconnectedtothegridrequirethatwindturbinesmustbeabletoridethoughduringvoltagedipsmeetingandexceedingthevariousgriddisturbancesthatbringvoltagesdowntoverylowgridcoderequirementsinFig.l.Thekernelofthisso