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1、IEEETRANSACTIONSONPOWERELECTRONICS,VOL.28,NO.11,NOVEMBER20134917EnhancementofCommutationReliabilityofanHVDCInverterbyMeansofanInductiveFilteringMethodYongLi,Member,IEEE,FangLiu,Member,IEEE,LongfuLuo,Member,IEEE,ChristianRehtanz,SeniorMember,IEEE,andYijiaCao,Member,IEEEAbstractAnewfilter-commu
2、tatedinverter(FCI)isproposedCSCCurrentsourceconverter.inthispapertoenhancethecommutationreliabilityoftheHVDCVSCVoltagesourceconverter.systemsappliedinthehigh-voltagefields.ThetopologyoftheFCILCILine-commutatedinverter.isestablishedbasedonaninductivefilteringmethod,whichmainlyFCIFilter-commutat
3、edinverter.consistsofanewconvertertransformer,fullytuned(FT)branches,inverterbridges,andarelatedcontrolsystem.Unlikethetradi-LCRLine-commutatedrectifier.tionalline-commutatedinverter(LCI),theequivalentcommutat-FCRFilter-commutatedrectifier.ingimpedanceoftheFCIincludesnotonlythetransformerleak-
4、FTFullytuned.ageimpedancebutalsothetotalimpedanceoftheFTbranches.ENTSO-EEuropeanNetworkofTransmissionThemathematicalmodelisestablishedtoexpresssuchequivalentSystemOperatorsforElectricity.commutatingimpedance.Basedonthis,thecommutationperfor-manceoftheFCIisinvestigatedindetailbycomparingwithL
5、CI.CIGREInternationalCouncilonLargeElec-Besides,thecommutationreliabilityisevaluatedunderdifferenttricSystems.operatingconditions(e.g.,normaloperation,balanced,andunbal-CFCommutationfailure.ancedfaults).BoththesimulationandtheexperimentalresultsDESDistributedenergysources.validatethetheoreti
6、calanalysis,andindicatethattheFCIwiththeRESRenewableenergysources.useoftheinductivefilteringmethodcangreatlyincreasethecom-mutationmarginoftheHVDCsystems,enhancethecommutationXμ−a1h,−b1h,−c1hEquivalentcommutationreactanceofreliabilityoftheinverter,andpreventtheoccurrenceofcommuta-A-,B-,andC-p
7、hases.tionfailures.Zμ−a1h,−b1h,−c1hEquivalentcommutationimpedanceIndexTermsCommutation,filter-commutatedinverter(FCI),ofA-,B-,andC-phases.high-voltagedirectcurrent(HVDC),inductivefilteringmethod,L1Equivalentcommutationinductanceinverter,line-commutat
