基于谐波有功功率贡献量的主谐波源定位.docx

基于谐波有功功率贡献量的主谐波源定位
论文：基于谐波有功功率贡献量的主谐波源定位
摘要：
谐波对电网稳定性和用电设备带来的影响已经引起越来越多的关注。在这个背景下，要想有效地解决谐波问题，就必须准确地定位主要的谐波源。本文提出了一种基于谐波有功功率贡献量的主谐波源定位方法。该方法通过测量不同负载下的谐波有功功率贡献量，结合复合电源模型进行分析，可以准确地定位主要的谐波源。本文的研究结果表明，该方法能够准确地定位主要的谐波源，并有效地降低谐波对电网稳定性和用电设备带来的影响。
关键词：谐波、有功功率、贡献量、定位、复合电源模型
Introduction：
Withthedevelopmentofpowerelectronicstechnology,theproblemofharmonichasbecomemoreandmoreprominent,whichbringsagreatimpactonthestabilityofthepowergridandtheoperationofelectricalequipment.Inordertoeffectivelysolvetheproblemofharmonic,itisnecessarytoaccuratelylocatethemainharmonicsource.Atpresent,therearemanymethodsforharmonicsourcelocation,suchastimedomainmethods,frequencydomainmethods,andwaveformcorrelationmethods.However,thesemethodshavesomedisadvantages,suchaslowaccuracyandhighcost.Therefore,itisofgreatsignificancetoexploreanewmethodforharmonicsourcelocation.
Basedonthemeasurementoftheharmonicactivepowercontributionunderdifferentloadsandtheanalysisofthecompositepowersupplymodel,thispaperproposesamethodforlocatingthemainharmonicsourcebasedontheharmonicactivepowercontribution.Thismethodhastheadvantagesofhighaccuracyandlowcost,andcaneffectivelyreducetheimpactofharmoniconthestabilityofthepowergridandtheoperationofelectricalequipment.
Theory:
Theharmonicisgeneratedbythenonlinearloadinthepowersystem,whichcanbeexpressedbyacompositepowersupplymodel.Thecompositepowersupplymodelcontainsalinearcomponentandanonlinearcomponent.Thelinearcomponentisavoltageoracurrentsource,andthenonlinearcomponentisacurrentsourcewithacharacteristiccurvethatisnotastraightline.Accordingtotheprincipleofsuperposition,thecurrentflowingthroughthenonlinearcomponentcanbedividedintofundamentalcurrentandharmoniccurrent.Theharmoniccurrentisthemaincauseofharmonic.
Theharmonicactivepowercontributionisameasureofthecontributionofharmonictothetotalactivepowerconsumption.Thetotalactivepowerconsumptionisthesumoftheactivepowerconsumptionofthefundamentalfrequencyandtheactivepowerconsumptionofeachharmonic.Theharmonicactivepowercontributioncanb