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1、www.ietdl.orgPublishedinIETRenewablePowerGenerationReceivedon14thSeptember2007Revisedon9thMarch2008doi:10.1049/iet-rpg:20070092ISSN1752-1416Animprovedfaultride-throughstrategyfordoublyfedinductiongenerator-basedwindturbines112A.H.KasemE.F.El-SaadanyH.H.El-Tam
2、aly2M.A.A.Wahab1DepartmentofElectricalandComputerEngineering,UniversityofWaterloo,Waterloo,ON,CanadaN2L3G12ElectricalEngineeringDepartment,FacultyofEngineering,MiniaUniversity,El-Minia61111,EgyptE-mail:ali_hkasem@yahoo.comAbstract:Keepingthegeneratorsoperatin
3、gduringtransientgridfaultsbecomesanobligationforthebulkwindgenerationunitsconnectedtothetransmissionnetworkanditishighlydesiredfordistributionwindgenerators.Aproposedschemeisimplementedtokeepthewind-powerDFIGoperatingduringtransientgridfaults.Challengesimpose
4、donthegeneratorcon?gurationandthecontrolduringthefaultandrecoveringperiodsarepresented.AcomprehensivetimedomainmodelfortheDFIGwiththedecoupleddqcontrollerisimplementedusingMatlab/Simulinksoftware.Intensivesimulationresultsarediscussedtoensurethevalidityandfea
5、sibilityoftheproposedfaultridethroughtechnique.TheschemeprotectstheDFIGcomponents,ful?llsthegridcoderequirementsandoptimisesthehardwareaddedtothegenerator.1Introductionturbine.Asaresult,theDFIGprotectionwilldisconnectthewindgeneratorfromthegrid.Increasedpenet
6、rationofwindgenerationinpowergridsisevidentandissupportedbybeingclean,renewableandToavoidunfavourableeffectscausedbywindgenerationhavingminimalrunningcostrequirements.However,disconnection,gridcodesinsomecountrieswhichhaveincreaseddeploymentofgridconnectedwin
7、dgenerationhighpenetrationofwindpowergenerationrequirethatallraisesseveralconcernsduetoitsweakbehaviourduringnewinstalledwindturbinesshouldhavethecapabilityofvoltagedipdisturbances.Theresponseofwindturbinefaultridethrough(FRT)orlowvoltageridethroughgenerators
8、tothegridvoltagedipdisturbancescanwidely(LVRT)[5–7].Thiscapabilitymeansthatallgenerationaffectthesystemstabilityand,induecourse,itisintensivelyplants,includingwindgeneration,shouldhavethe
