State-of-Art of wind turbine system and interconnection

《State-of-Art of wind turbine system and interconnection》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、DetlefSchulzElectricalPowerSystemsState-of-theArtofWindTurbineElectricalSystemsandGridInterconnectionTERNAWindEnergyandDevelopmentDialogue2007,11.10.2007,Berlin1ContentD.Schulz⇒GridconnectedWindTurbine(WT)⇒Usablewindpower⇒FixedandvariablespeedWT⇒Generatortypes⇒Gridinterconnectio

2、n⇒OffshoredesignedWT⇒Mediumvoltageequipment⇒Powerelectronicconnection⇒Powerquality⇒Windparkstructure⇒Summary2GridconnectedWindTurbineD.Schulza)Four-polegeneratorwithgearb)Multi-polegeneratorwithoutgearc)Schematicdrawing3UsablewindpowerD.Schulz13P=ρ⋅A⋅v⋅cp24FixedandvariablespeedW

3、TsD.SchulzUsablewindpower13P=ρ⋅A⋅v⋅cp25D.Schulzn1n2G3~==~36Gridcoupling:generatortypesD.Schulza)Directcoupledasynchronousgeneratorb)Convertercoupledasynchronousgeneratorc)Double-fedasynchronousgeneratorstandardMWpowerclassd)ConvertercoupledsynchronousgeneratorConvertercoupledsyn

4、chronousgeneratore)withpermanentexcitation7DrivetrainconceptsD.SchulzGeneratorandgearGearless,multipolegeneratorPicture:NordexPicture:Enercon8DrivetraindetailsD.SchulzDoubly-fedinductionmachineSynchronousmachinewithfull-sizeVSI9WT-typeswithgridinterconnectionD.SchulzStall-contro

5、lledWTwiththyristorstartPitch-WTwithfull-sizeconverterPitch-WTwithdouble-fedgenerator10WTwith5MWpowerinoffshoredesignD.SchulzMulti-polesynchronousPicture:generatorwithpermanentMultibridmagnetexcitation,slow-speedgearSpecialdesignforoffshore-installationLowweightofthegeneratorGen

6、eratorandinverter:mediumvoltage3.3kVTwoprototypes,sixoffshoreWTsnextyear11MediumvoltageequipmentforWTD.SchulzState-of-theArt•Powerelectronicdevicesformediumvoltagedesign:upto6kV•Press-packIGBTs(InsulatedGateBipolarTransistor)andIGCTs(IntegratedGateCommutatedThyristor)•Powerelect

7、ronicconvertersintherangeof4MWupto33MW•Mediumvoltagelevel:goodpower/volume-ratio•Advantages:smallgeneratordesign,lownacelleweight,smallcables•Disadvantagesofmediumvoltagecomponents:onlyfewsupplier12PowerelectronicgridconnectionofWTD.SchulzIGBTsixpackCurrentripplesduetoinvertersw

8、itchingControlTypicalswitchingfrequencies:2,5…3