LCC-VSC混合直流输电系统分析及仿真验证-吴杰

312Vol.3No.12201512SmartGridDec.2015DOI10.14171/j.2095-5944.sg.2015.12.0092095-5944(2015)12-1136-07TM72ALCC-VSC(066004)AnalysisandSimulationofLCC-VSCHybridHVDCTransmissionSystemWUJie,HANXiao,LIUMengdan(InstituteofElectricalEngineering,YanshanUniversity,Qinhuangdao066004,HebeiProvince,China)ABSTRACT:AnewformofHVDCtransmission,namedhybridHVDCisresearchedbasedonthesummaryofthedevelopment,technologycharacteristicsandapplicationscopeofconventionallinecommutatedconverter(LCC)-HVDCandvoltagesourceconverter(VSC)-HVDC.Thehybrid-HVDCtransmissionsystemismadeupbyLCCconverterandVSCconverter.ThestationtopologyandoperatingprincipleofhybridHVDCareintroducedhereatfirst,then,akindofcontrolstrategyforthesystemisanalyzedthensimulatedandverifiedthroughtheelectro-magneticransientimulationsoftwarePSCAD/EMTDC.SimulationresultsshowthattheproposedhybridHVDCtransmissionsystemhastheadvantagesofthetwokindsofHVDCs,andwhenfaultslikesingle-phaseroundingandthree-phaseshortcircuitoccurinthesystem,steadyoperationoftheproposedhybridHVDCcanberapidlyrestored.Thiskindofsystemcanbeappliedtocentralizedpoweranddistributedpower,andhasthecapabilityofenergyinterconnection.KEYWORDS:HVDC;linecommutatedconverter(LCC);voltagesourceconverter(VSC);hybridHVDC;fault——(linecommutatedconverterLCC)(voltagesourceconverterVSC)PSCAD/EMTDC0[1-4][5](voltagesourceconverterVSC)(pulsewidthmodulationPWM)(VSC-HVDC)[6-11]VSC-HVDC[12-14](hybrid-HVDC)[15][16]VSC[17]3121137[18](linecommutatedconverterLCC)(capacitorcommutatedconverterCCC)11.11LCCVSCLCCPWM1Fig.1StructurediagramofhybridHVDCLCCαγUd1d1s132[coscos()]2UUααγ=++π(1)VSCλRUd2d2s22/UUm=(2)Iddd1d2d()/IUUR=−(3)PQs2c22sinUUPXδ=(4)s2c2s22(cos)UUUQXδ−=(5)Us2Uc2δ()X2(4)(5)δλδλ1.21MWMW2VSC3PWMVSCPWMVSC4VSC5VSC-HVDCVSC-HVDC2LCCVSC2.1LCCLCC-HVDC(PI)αPIβα21138LCC-VSCVol.3No.122LCCαFig.2ControlblockdiagramofαinLCC(voltagedependentcurrentorderlimitVDCOL)2.2VSCVSC——VSCPWMλδVSC33VSCFig.3InnerandouterringcontrolofdirectcurrentcontrolinVSCstation2.34ref4(BG)(CE)α(AB)VDCOLΔIdref(CF)()4Fig.4Steady-statecharacteristiccurveofhybridHVDCtransmissionsystem3PSCAD/EMTDCLCC-VSCCIGREVSC500kV2kA10.7127Ω0.5968H0.4761Ω0.5968H2.5Ω26μF0.0365H0.05375H2.03.15recinv50.7s31211391.0puLCCVSC1000940MW1.0pu(a)(b)(c)(d)5Fig.5Start-upprocedureandsteady-statecharacteristicsofhybrid-HVDCtransmissionsystem3.23.2.11sA0.05s63.2.21s0.05s7(a)(b)(c)(d)6Fig.6Simulationwaveformswhensingle-phasegroundfaultoccurs1140LCC-VSCVol.3No.12(a)(b)(c)(d)7Fig.7Simulationwaveformswhenathree-phaseshortcircuitfaultoccurs3.2.31s0.05s83(a)(b)(c)(d)8Fig.8SimulationwaveformswhenaDClineshortcircuitfaultoccurs3.3LCC-VSC800MW93121141(a)(b)(c)(d)9Fig.9SimulationwaveformswhentheinverterconnectstoapassivenetworkVSCLCC-VSC4LCC-VSCLCCVSCPSCAD/EMTDC[1][J]200733(1)1-10XuZhengChenHairongReviewandapplicationsofVSCHVDC[J]HighVoltageEngineering200733(1)1-10(inChinese)[2]GuoCYLiuWJZhaoCYResearchonthecontrolmethodforvoltage-currentsourcehybrid-HVDCsystem[J]ScienceChinaTechnologicalSciences201356(11)2771-2777[3]ZhangGXuZSteady-statemodelforVSCbasedHVDCanditscontrollerdesign[C]//PowerEngineeringSocietyWinterMeetingColumbusIEEE20011085-1090[4][J]201543(1)39-45WangKaiHuXiaoboAreviewofdevelopment,typicaltopologiesandpowerflowcontrolstrategiesofDCgrid[J]ShaanxiElectricPower201543(1)39-45(inChinese)[5]KotbOSoodVKAhybridHVDCtransmissionsystemsupplyingapassiveload[C]//ElectricPowerandEnergyConference(EPEC)HalifaxIEEE20101-5[6][M]2014[7]FaruqueMOZhangYDinavahiVDetailedmodelingofCIGREHVDCbenchmarksystemusingPSCAD/EMTDCandPSB/Simulink[J]IEEETransactionsonPowerDelivery200621(1)378-387[8]ManoharPKelamaneVKaushikDetalImprovedcontrolsforLCC-VSChybridHVDCsystem[C]//2013InternationalConferenceonCircuitsControlsandCommunications(CCUBE)BengaluruIEEE20131-5[9][D]2007YuanXufengResearchontheoryofnovelhybridmultiterminalHVDCsystemandsomekeyproblems[D]WuhanHuazhongUniversityofScienceandTechnology2007(inChinese)[10]1142LCC-VSCVol.3No.12[J]201337(15)146-151ZhaoChengyongLiuWenjingGuoChunyietalTopologyofahybridHVDCtransmissionsystemforwindpowergridconnection[J]AutomationofElectricPowerSystems201337(15)146-151(inChinese)[11][J]201442(5)35-39SuXinxiaWangZhijieChenLijuanStudyonVSC-HVDCanditsapplicationprospect[J]ShaanxiElectricPower201442(5)35-39(inChinese)[12]Torres-OlguinREMolinasMUndelandTHybridHVDCconnectionoflargeoffshorewindfarmstotheACgrid[C]//2012IEEEInternationalSymposiumonIndustrialElectronics(ISIE)Hangzhou20121591-1597[13]VSC-HVDC[J]200835(6)39-43ZhaoChengyongMaGuopengLiGuangkaiResearchoncharacteristicsofregulationofVSC-HVDCsupplyingpowertopassivenetwork[J]JournalofNorthChinaElectricPowerUniversity200835(6)39-43(inChinese)[14]DasBPWatsonNLiuYSimulationstudyofconventionalandhybridHVDCrectifierbasedonCIGRÉbenchmarkmodelusingPLL-lesssynchronisationscheme[C]//20115thInternationalPowerEngineeringandOptimizationConference(PEOCO)SelangorIEEE2011312-317[15]Torres-OlguinREMolinasMUndelandTAdirectpowercontrolforhybridHVDCtransmissionsystems[C]//PowerTech:2011IEEETrondheimTrondheimIEEE20111-6[16]CSCVSC[J]200630(20)32-36YuanXufengChengShi