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'spowerdefi

2、nitionisproposed.Theresultsoftheoreticalanalysisandsimulationshowthattheproposedmethodiseffectiveinreal-timedetectingofinstantaneousharmonicandreactivecurrentsinsingle-phasecircuits.Whenonlydetectingthetotalreactivecurrents，thismethoddoesnotneedaphase-loc

3、kedloopcircuit,anditalsocanbeusedinsomespecialapplicationstoprovidedifferentcompensationsonthegroundofdifferentrequirementsofelectricnetwork.Comparedwiththeothermethodsbasedonthetheoryofinstantaneousreactivepower,thismethodissimpleandeasytorealize.Keyword

4、sActivefilter;Harmonic;Reactivecurrent;Real-timedetection;Single-phasecircuit;Electric-network0、IntroductionAtpresentitisamajortendencytolimitharmonicswithactivefilters，whichcannotonlylimitharmonicsdynamicallyandcompensatereactivepowerbutalsocanachieveaco

5、ntinuousanddynamictrackingofthecompensationfortime-varyingharmonicandreactivecurrentsandarenotapttobeaffectedbytheresistanceofelectricnetwork.Thekeytechnologyofactivefilteristhereal-timedetectingofharmonicsandreactivecurrentsfromloadcurrentstoreceiverefer

6、encetomeettheneedoftheactivefilter.Therefore，theresultofthefilterwillbeinfluencedbytheaccuracyandreal-timeabilityofthedetection.Onthebasisofthetheoryofinstantaneousreactivepowerinthree-phasecircuit，manyrelativelymaturedetectingalgorithmsforharmonicsandrea

7、ctivecurrentsofthree-phasecircuitshavebeenproposed，suchasthemethodsofp,q,ipandHowever,insingle-phasecircuits，thesemethodscannotbedirectlyusedandanextra20外文原文two-phasevoltageandcurrentneedtobeconstructed，whichlowersthereal-timeabilityandmakesthealgorithmmo

8、recomplicated.Refs.[1,5]presentedamethodthatisconstruetedonthebasisofFryze'spowerdefinition,butitneedsoneintegralcyclebeforeeducingthedetectionresults.Since1980s，manyresearchers,e.g.Czarnecki,haveanalyzedthenon-sinu