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1、IEEETRANSACTIONSONPOWERELECTRONICS,VOL.24,NO.12,DECEMBER20092803ModelingandEstimatingCurrentHarmonicsofVariableElectronicLoadsWaritWichakool,StudentMember,IEEE,Al-ThaddeusAvestruz,StudentMember,IEEE,RobertW.Cox,Member,IEEE,andStevenB.Leeb,Fellow,IEEEAbstract
2、Thispaperdevelopsamodelforrelatinginputcur-monics.ThemodelsdevelopedherecanalsobeusedtotrackrentharmoniccontenttorealpowerconsumptionforvariableanddisaggregatetherealpowerconsumptionofVSDsandrec-electronicloads,specificallyforloadsactivelycontrolledinverterst
3、ifierloadsgivenobservationsofharmoniccurrents.Thistypeenergizedbyanuncontrolledrectificationoftheutility.Thismodelofmodelingenablesthedevelopmentof“smart”ornonintru-servesasthebasisforamethodforestimatinganddisaggregatingthepowerconsumptionofvariablespeeddrive
4、s(VSDs)andrec-siveelectricmeteringsolutions.nonintrusive“smart”meteringtifierloadsfromotherconstantpowerloads.Thismethodcanbecandeterminetheoperatingscheduleofacollectionofelectri-usedfornonintrusivepowermonitoring.Theapproachdescribedcalloadsstrictlyfrommeas
5、urementsmadeattheelectricutilityinthispaperusestheapproximateswitchingfunctionoftherec-serviceentrypoweringacollectionofloads[12].Anonintrusivetifiertoderivethebestestimatingfunctionforthefundamentalloadmonitoring(NILM)systemtrackstheoperatingconditioncurrent
6、harmonicfromafinitesetofcurrentharmonicsuniquelyassociatedwiththeoperationofthedrive.ExperimentalresultsandpowerconsumptionofmultipleloadsusinglinecurrentshowthattheproposedVSDpowerandharmonicestimatorcanharmonicsignaturesorspectralenvelopes[10]–[14].Foracon-
7、trackVSDpowerconsumptionformonitoringgivenknowledgeorstantpowerload,theidentificationisaccomplishedbysearch-anestimateoftheinputcurrentharmoniccontent.ingtheaggregatesetofcurrentharmonicsignaturesorspectralIndexTermsRectifiers,spectralanalysis,switchingfunctio
8、ns,envelopesfortheappropriatecombinationofcharacteristictran-variablespeeddrives.sientpatternsandsteady-statepowerchanges[11],[12].Contin-uously,variableloadslikevariablespeeddrives(VSDs)donotI.
