大型风电场的瞬时稳定和模拟论文

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1、大型风电场的瞬时稳定和模拟毕业论文ModellingandtransientstabilityoflargewindfarmsVladislavandHansKnudsenandArneHejdeNielsenandJorgenKaasPedersenandNielsKjolstadPoulsenDepartmentsofElectricPowerEngineering,TechnicalUniversityofDenmark,Building325,DK—2800Lyngby,VladislavDemmark1.IntroductionDenm

2、arkhascurrentlyabout2300MWwindpowercapacityinon-landandfewoffshoresettings,whichcorrespondstomorethan20%ofpowerconsumption(inaverage).Further,constructionoftwolarge-scaleoffshorewindfarmsof150MWpowercapacityeachhasbeenannounced.ThefirstlargeoffshorewindfarminDenmarkwillbecons

3、tructedatHomsRevbytheyear2002intheareaofthesystemoperatorELTRA.ThiswillbefollowedbythefirstintheareaoftheEasternDanishsystemoperator,ELKRAFTSystem,largeoffshorewindfarmatRodsandbytheyear2003.Theinstalledcapacityinon-landsettingsandincombinedheat-powerunits(UHP)willincreaseasw

4、ell,whilstthepowerproductionandcontrolabilityoftheconventionalpowerplantswithrespecttovoltageandfrequencyarereduced.Intheyearstocome,thepowerproductionpatternintheDanishpowersystemwillchangefromthepowersupplyfromconventionalpowerplants―asitisknowntoday―toapowersupplymix,where

5、about30-40%ofpowerconsumption(inaverage)iscoveredbywindpower.Inotherwords,thepowertechnologywillundergochangesfromawell-knowntechnologybuilt-upaboutconventionalpowerplantstoapartlyunknowntechnology―windpower.Intheyeartocomeitwillbefocusingonmaintainingpowersystemstabilityandv

6、oltagestability,forexampleatashortcircuitfault,ensuringpowersupplysafetyandotherimportanttasksasamountofwindpowerisdrasticallyincreasing.Thissituation19makesitnecessarytofindsolutionswithrespecttomaintainingdynamicstabilityofthepowersystemwithlargeamountofwindpoweranditsrelia

7、bleoperation.Thesesolutionsarebasedonanumberofrequirementsthatareformulatedwithrespecttooperationofthelargeoffshorewindfarmsandtheexternalpowersystemincaseoffailureeventsintheexternalsystem.Thepapercontainsseparatesubjectsdealingwithdesignofwindmillsforlargeoffshoreapplicatio

8、nsandtheircontrolthatshallbetakenintoaccountwithrespecttoimprovingth