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1、5550IEEETRANSACTIONSONINDUSTRIALELECTRONICS,VOL.60,NO.12,DECEMBER2013ATwo-StageSolutionProcedureforDigitalPowerMeteringAccordingtoIEEEStandard1459-2010inSingle-PhaseSystemCheng-IChen,Member,IEEEAbstractThispaperdescribesanartificialneuralnetworkwhenusingFFT.Thefirstoneistha
2、tthesamplingfrequencyin(ANN)-basedmethodforthedesignofadigitalpowermeter,themeasurementshouldbeatleasttwotimesofthehighestfre-whichisabletoevaluatethepowerquantitiessuggestedinIEEEquencyintheanalyzedsignal,whichisthewell-knownNyquistStandard1459-2010forasingle-phasesystem
3、.Thesolutionpro-theorem.Thesecondrequirementisthattheanalyzedsignalcedurecontainstwostages.Inthefirststage,thespectralanal-ysisofvoltageandcurrentsignalsisperformedseparatelywithshouldbeperiodic.Inaddition,thesamplingfrequencyshouldtheANN-basedmethodinareal-timemanner.Then
4、,thepowerbeintegermultiplesofthefundamentalfrequency.ThefinalonequantitiesandevaluationindicesarecalculatedinthesecondisthatasuitableanalysisresolutionshouldbedeterminedinstageaccordingtotherequirementsinIEEEStandard1459-2010.advance.However,thepowersignalsareusuallyslight
5、lytimeFinally,apersonal-computer-basedinstrumentimplementedwithvaryingduetothepowermismatchbetweenpowergenera-LabVIEWisdevelopedtoverifytheusefulnessoftheproposedmechanism.tionandloaddemands.Therefore,directusageofFFTwouldcausespectralleakagesandmakethepowermeasurementInd
6、exTermsArtificialneuralnetwork(ANN),IEEEStandardinaccurate[2].Althoughseveraltechniquescanbeadoptedto1459-2010,powerquality,single-phasesystem,virtualinstrument.resolvethepitfallsofFFT,additionalcomputationalburdenI.INTRODUCTIONmaybeintroduced[2]–[4].Moreover,thetraditiona
7、lFFT-basedmethodsneedmorethanonecycleofanalyzedsignaltoper-ITHTHEwidespreaduseofnonlineardevices,theformthemeasurement,whichwoulddeterioratethereal-timeWwaveformofthevoltageconnectedtothepowersystemrequirements[5].isdistorted.DistortedvoltagesandcurrentsmayintroducelargeI
8、nrecentyears,thespectralanalysistechniquesinthetimepowerlossandmisoperationofelectricequipment.I
