Intelligent Design of Low Voltage Side Circuit in Active Electronic Current Transformer 英语论文

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1、IntelligentDesignofLowVoltageSideCircuitinActiveElectronicCurrentTransformerABSTRACTWiththedevelopmentofpowerindustryandtheincreaseofvoltagelevel,manyproblemsofelectromagneticcurrenttransformerhademerged,thustheconceptofelectroniccurrenttransformerwasproposedbyInternationalElectro-technic

2、alCommission(IEC)inordertosolvethosequestions.Thereinto,theactiveelectroniccurrenttransformerisconsideredasthemostfeasible.However,manydisadvantagessuchashighcost,lowgeneralityandintelligencewereencounteredwhenusingNormalIntegratedCircuitinthelow-voltageside.Anewdesigningmethodoflow-volta

3、gesidecircuitisintroducedinthispaper.IttakesadvantageofDigitalSignalProcessor（DSP）’spowerfuldataprocessabilitytorealizepreciseanalysisanddataprocessing.Moreover,theperipherycircuitofthismethodismuchsimplerthanabovemethods.Someparticularfunctionssuchasfrequencymeasurementandharmonicanalysi

4、scouldalsobeprovidedbyusingthismethod.Thefunctionsoflocaldisplayandremotecommunicationcouldbeselectedinaccordancewithrequirement.Themeasuringresultindicatesthattherationerrorsatisfiesthenationalstandardof0.1classtransformer.Andthismethodisquitegeneralforitsflexibilityofthenumbersofmonitor

5、ingparameterinthehigh-voltagesideandthebitsofanalog-to-digitalconvert.KEYWORDS:Electroniccurrenttransformer,DSP,Frequencymeasurement,Harmonicanalysis9INTRODUCTIONAsanimportantpartofprotectingandmeteringsystems,theaccuracyofcurrenttransformerisstronglyrelativewiththesecurityandreliabilityo

6、fpowersystem.Conventionalelectromagneticcurrenttransformers(CT),whicharenowfrequentlyusedinthepowersystem,couldensuretheaccuracyandreliabilityrequiredformeteringandprotection.Butwiththeproblemofdifficultinsulationandtheeffectofthesaturation,theconventionalcurrenttransformerismoreandmoreun

7、fitforthedevelopmentofmodernpowersystem.Thenmanymeasurementtechniqueshavebeendevelopedinordertosolveabovedisadvantagesofconventionalcurrenttransformers.Recently,manyachievementshavebeenacquiredintheopticalcurrentmeasurementfieldduetotheappearanceofintegratescircuita