Thesis - Modeling of wind turbines for power system studies

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1、THESISFORTHEDEGREEOFDOCTOROFPHILOSOPHYModelingofWindTurbinesforPowerSystemStudiesTOMASPETRUDepartmentofElectricPowerEngineeringCHALMERSUNIVERSITYOFTECHNOLOGYG•oteborg,Sweden2003ModelingofWindTurbinesforPowerSystemStudiesTOMASPETRUISBN91-7291-306-1cTOMASPETRU,2003.Doktorsavhand

2、lingarvidChalmerstekniskah•ogskolaNyserienr1988ISSN0346-718xTechnicalReportNo.449ISSN1651-498xDepartmentofElectricPowerEngineeringSchoolofElectricalEngineeringChalmersUniversityofTechnologySE-41296G•oteborgSwedenTelephone+46(0)31-7721000ChalmersBibliotek,ReproserviceG•oteborg,Sweden200

3、3ModelingofWindTurbinesforPowerSystemStudiesTOMASPETRUDepartmentofElectricPowerEngineeringChalmersUniversityofTechnologyAbstractThepowerqualityimpactofwindturbinesontheelectricgridandtheresponseofthewindturbinestofaultsintheelectricgridareinvestigatedinthisthesis.Adetailedmodelofast

4、all-regulated,xed-speedwindturbinesystemcapableofpredictingthe ickerimpactontheconnectedgridispresentedandcomparedwitheldmeasurements.Theresponsesofxed-speedandvariable-speedwindturbinesystemstofaultsintheelectricgridareinvestigatedandcomparedwitheldandlaboratorymeasurements.Models

5、tructuressuitableforgridfaultresponsesimula-tionsofthexed-speedandthevariable-speedwindturbinesystemsaresuggested.Inthedetailedmodelofthestall-regulated,xed-speedsystem,thewindgenera-tionandtheaerodynamicconversionaretreatedintwodierentways.Adetailedwindeldsimulationandanaerodynami

6、cconversionbasedonwingpropertiesarecomparedwithasimpliedapproachthatmakesuseofasinglepointwindsimula-tionandthewindturbinepowercurve.Asoftshaftrepresentationisusedforthedescriptionofthedrivetrain,andtheuseofdierentgeneratormodelcomplexitiesisinvestigated.Resultsofthesimulationsarecom

7、paredwitheldmeasurementsanditisfoundthatthemeasuredgridvoltagehasasignicantin uenceontheobtainedresults.Theshortcircuitimpedanceangleoftheconnectedgridhasalsoasignicantimpactontheaccuracyoftheresults.Itisconcludedthatthegridfaultresponseofthexed-speedsystemsismainlycoveredbythedr