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1、10MWWindTurbineDirect-DriveGeneratorDesignwithPitchorActiveSpeedStallControlH.Polinder,D.BangR.P.J.O.M.vanRooijA.S.McDonald,M.A.MuellerElectricalPowerProcessing/DUWINDWindEnergyResearch/DUWINDInstituteforEnergySystemsDelftUniversityofTechnologyDelftUniversityofTechnologyTheUniversityofEdinburghM
2、ekelweg4,2628CDDelftKluyverweg1,2629HSDelftKingsBuildings,MayfieldRoad,TheNetherlandsTheNetherlandsEdinburgh,EH93JL,UnitedKingdomAbstract-Theobjectivesofthispaperaretoinvestigatethe-Theaerodynamicperformanceatwindspeedsaboveratedfeasibilityofa10MIWgeneratorforadirect-drivewindturbineislimitedbya
3、ctivelycontrollingtherotorspeed.Thisandtocomparethegeneratorsystemsforpitchcontrolandformeansthatifthewindspeedincreasestovaluesaboveactivespeedstallcontrol.Theideabehindtheactivespeedstallrated,thegeneratorreducestherotorspeedofthewindcontrolconceptistomakearotorthatisassimpleaspossible,tandthe
4、reforeveryrobustandsuitableforoffshorewindturbinesothatnotmorethanratedpowerisproduced.turbines.ThisisdonebyremovingthepitchcontroloftheItisnotnewtousewindturbineswithoutpitchcontrol.blades.Aboveratedwindspeed,thepowerisnotcontrolledbyUntilthelate1990s,manywindturbinemanufacturersbuiltcontrollin
5、gthepitch,butbycontrollingtherotorspeed:therotorconstantspeedwindturbineswithpowerlevelsbelow1.5speedissomuchreducedthattheaerodynamicpowerislimitedMWwithstallcontrol,whichmeansthatthebladescannottotheratedvalue.Arough10MIWpermanent-magnetdirect-.'drivegeneratordesignispresented,indicatingthatsu
6、chap[Htgeneratorisfeasible.Itisshownthatforathoroughevaluationofbladesoftheseturbinesisnotoptimumbecausethedesignofactivespeedstallcontrol,moreknowledgeisrequiredaboutthebladesisacompromisebetweenmaximumaerodynamicchangesinthewindspeed.However,aconsiderableincreaseinefficiencyatwindspeedsbelowra
7、tedandlimitedgeneratorsystemcostisnecessarytoenableactivespeedstallaerodynamicefficiency(resultinginaroughlyconstantoutputcontrol.power)atwindspeedsaboverated.Whatisnewintheactivespeedstallcontrolconceptisthatthepoweriscontr
