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

《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》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

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

2、ftheoreticalanalysisandsimulationshowthattheproposedmethodiseffectiveinreal-timedetectingofinstantaneousharmonicandreactivecurrentsinsingle-phasecircuits.Whenonlydetectingthetotalreactivecurrents，thismethoddoesnotneedaphase-lockedloopcircuit,anditalsocanbeusedinsomespecialapplicatio

3、nstoprovidedifferentcompensationsonthegroundofdifferentrequirementsofelectricnetwork.Comparedwiththeothermethodsbasedonthetheoryofinstantaneousreactivepower,thismethodissimpleandeasytorealize.KeywordsActivefilter;Harmonic;Reactivecurrent;Real-timedetection;Single-phasecircuit;Electr

4、ic-network0、IntroductionAtpresentitisamajortendencytolimitharmonicswithactivefilters，whichcannotonlylimitharmonicsdynamicallyandcompensatereactivepowerbutalsocanachieveacontinuousanddynamictrackingofthecompensationfortime-varyingharmonicandreactivecurrentsandarenotapttobeaffectedbyt

5、heresistanceofelectricnetwork.Thekeytechnologyofactivefilteristhereal-timedetectingofharmonicsandreactivecurrentsfromloadcurrentstoreceivereferencetomeettheneedoftheactivefilter.Therefore，theresultofthefilterwillbeinfluencedbytheaccuracyandreal-timeabilityofthedetection.Onthebasisof

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

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

8、analyzedthenon-sinu