Analysis_ Modeling And Control of__ Doubly Fed Induction Generators for Wind Turbines.pdf

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1、THESISFORTHEDEGREEOFDOCTOROFPHILOSOPHYAnalysis,ModelingandControlofDoubly-FedInductionGeneratorsforWindTurbinesANDREASPETERSSONDivisionofElectricPowerEngineeringDepartmentofEnergyandEnvironmentCHALMERSUNIVERSITYOFTECHNOLOGYGoteborg,Sweden2005¨Analysis,Mode

2、lingandControlofDoubly-FedInductionGeneratorsforWindTurbinesANDREASPETERSSONISBN91-7291-600-1cANDREASPETERSSON,2005.DoktorsavhandlingarvidChalmerstekniskahogskola¨Nyserienr.2282ISSN0346-718xDivisionofElectricPowerEngineeringDepartmentofEnergyandEnvironmen

3、tChalmersUniversityofTechnologySE-41296Goteborg¨SwedenTelephone+46(0)31-7721000ChalmersBibliotek,ReproserviceGoteborg,Sweden2005¨Analysis,ModelingandControlofDoubly-FedInductionGeneratorsforWindTurbinesANDREASPETERSSONDivisionofElectricPowerEngineeringDepa

4、rtmentofEnergyandEnvironmentChalmersUniversityofTechnologyAbstractThisthesisdealswiththeanalysis,modeling,andcontrolofthedoubly-fedinductiongener-ator(DFIG)forwindturbines.Differentrotorcurrentcontrolmethodsareinvestigatedwiththeobjectiveofeliminatingthein

5、?uenceofthebackelectromotiveforce(EMF),whichisthatof,incontrolterminology,aloaddisturbance,ontherotorcurrent.ItisfoundthatthemethodthatutilizesbothfeedforwardofthebackEMFandso-called“activeresistance”managesbesttosuppressthein?uenceofthebackEMFontherotorcu

6、rrent,particularlywhenvoltagesagsoccur,oftheinvestigatedmethods.Thismethodalsohasthebeststabilityproperties.Inadditionitisfoundthatthismethodalsohasthebestrobustnesstoparameterdeviations.TheresponseoftheDFIGwindturbinesystemtogriddisturbancesissimulatedand

7、ver-i?edexperimentally.Avoltagesagto80%(80%remainingvoltage)ishandledverywell.Moreover,asecond-ordermodelforpredictionoftheresponseofsmallvoltagesagsoftheDFIGwindturbinesisderived,anditssimulatedperformanceissuccessfullyveri?edexper-imentally.Theenergyprod

8、uctionoftheDFIGwindturbineisinvestigatedandcomparedtothatofotherwindturbinesystems.TheresultfoundisthattheenergycaptureoftheDFIGwindtur-bineisalmostthesameasforanactivestall-controlled?xed-speed(usingtwo?xeds