电力系统及其自动化外文翻译--实时检测谐波和单相电路无功功率的方法

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1、外文原文Real-TimeMethodforDetectingHarmonicandReactiveCurrentsofSingle-PhaseCircuitsAbstractAccordingtothecharacteristicsofsingle-phasecircuitsanddemandofusingactivefilterforreal-timedetectingharmonicandreactivecurrents,adetectingmethodbasedonFryze'spowerdefinitionisproposed.Theresultsoftheo

2、reticalanalysisandsimulationshowthattheproposedmethodiseffectiveinreal-timedetectingofinstantaneousharmonicandreactivecurrentsinsingle-phasecircuits.Whenonlydetectingthetotalreactivecurrents，thismethoddoesnotneedaphase-lockedloopcircuit,anditalsocanbeusedinsomespecialapplicationstoprovid

3、edifferentcompensationsonthegroundofdifferentrequirementsofelectricnetwork.Comparedwiththeothermethodsbasedonthetheoryofinstantaneousreactivepower,thismethodissimpleandeasytorealize.KeywordsActivefilter;Harmonic;Reactivecurrent;Real-timedetection;Single-phasecircuit;Electric-network0、Int

4、roductionAtpresentitisamajortendencytolimitharmonicswithactivefilters，whichcannotonlylimitharmonicsdynamicallyandcompensatereactivepowerbutalsocanachieveacontinuousanddynamictrackingofthecompensationfortime-varyingharmonicandreactivecurrentsandarenotapttobeaffectedbytheresistanceofelectr

5、icnetwork.Thekeytechnologyofactivefilteristhereal-timedetectingofharmonicsandreactivecurrentsfromloadcurrentstoreceivereferencetomeettheneedoftheactivefilter.Therefore，theresultofthefilterwillbeinfluencedbytheaccuracyandreal-timeabilityofthedetection.Onthebasisofthetheoryofinstantaneousr

6、eactivepowerinthree-phasecircuit，manyrelativelymaturedetectingalgorithmsforharmonicsandreactivecurrentsofthree-phasecircuitshavebeenproposed，suchasthemethodsofp,q,ipandHowever,insingle-phasecircuits，thesemethodscannotbedirectlyusedandanextra20外文原文two-phasevoltageandcurrentneedtobeconstru

7、cted，whichlowersthereal-timeabilityandmakesthealgorithmmorecomplicated.Refs.[1,5]presentedamethodthatisconstruetedonthebasisofFryze'spowerdefinition,butitneedsoneintegralcyclebeforeeducingthedetectionresults.Since1980s，manyresearchers,e.g.Czarnecki,haveanalyzedthenon-sinu