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《Thesis - A hybrid LCC-VSC HVDC transmission system supplying》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、AHybridLCC-VSCHVDCTransmissionSystemSupplyingaPassiveLoadbyOmarKotbAthesispresentedtotheUniversityofOntarioInstituteofTechnologyinfulfillmentofthethesisrequirementforthedegreeof(MasterofAppliedScience)in(ElectricalandComputerEngineering)Oshawa,Ontario,C
2、anada,2010?(OmarKotb)2010AUTHOR'SDECLARATIONIherebydeclarethatIamthesoleauthorofthisthesis.Thisisatruecopyofthethesis,includinganyrequiredfinalrevisions,asacceptedbymyexaminers.Iunderstandthatmythesismaybemadeelectronicallyavailabletothepublic.iiAbstrac
3、tHighVoltageDirectCurrent(HVDC)transmissionsystemscontinuetobeanexcellentassetinmodernpowersystems,mainlyfortheirabilitytoovercometheproblemsofACtransmission,suchastheinterconnectionofasynchronousgrids,stabilityoflongtransmissionlines,anduseoflongcables
4、forpowertransmission.Inthepast20years,VoltageSourceConverter(VSC)-HVDCtransmissionsystemsweredevelopedandinstalledinmanyprojects,therebyaddingmoreoperationalbenefitstoDCtransmissionoption,suchashighcontrollability,abilitytosupplyweaknetworks,andreducedc
5、onverterreactivepowerdemand.Nevertheless,VSC-HVDCtransmissionsuffersfromthedisadvantagesofhighlossesandcost.Inthisresearch,ahybridHVDCemployingaLineCommutatedConverter(LCC)asrectifierandaVSCasinverterisusedtosupplyapassivenetworkthroughaDCcable.Thehybri
6、dsystemisbestsuitedforunidirectionalpowertransmissionscenarios,suchaspowertransmissiontoislandsandremoteloadcenters,wheretheconstructionofnewtransmissionlinesisprohibitivelyexpensive.ControlmodesfortherectifierandinverterareselectedandimplementedusingPr
7、oportionalIntegral(PI)controllers.SpecialcontrolschemesaredevelopedforabnormaloperatingconditionssuchasstartingatlightloadandrecoveringfromACnetworkfaults.ThesystemperformanceundersteadystateandtransientconditionsisinvestigatedbyEMTP-RVsimulations.There
8、sultsshowthefeasibilityofthehybridsystem.iiiAcknowledgements??????????????????????????????????????????)???(??????????????????????(???????????????????)?????????????:???-???(162.Say:"Verily,my
