APFisanewdynamicharmonicandreactivecurrentcompensationdevice,withthetraditionalpassiveLCpowerfiltercomparedwithafastresponse,thecompensationeffect,dynamiccompensationandotheradvantages.Activepowerfilterforpowerqualityimprovementisadevelopingtrendinthefuture,whichShuntActivePowerFilterdominantposition.InChinaforresearchanddevelopmentofactivepowerfilterisstillinexperimentalstage,sothisarticleonthemostbasicofshuntactivepowerfilterhardwarecircuitforamoresystematictheoreticalandexperimentalresearch.ThisarticledescribesthebasicprinciplesofAPFanddevelopmentintheworld.
TexttoPM15RSH120inverterchip-centricanalysisoftheshuntvoltageactivepowerfilterworks,DCpowersupply,harmoniccurrentdetectioncircuit,PWMdrivercircuitandotherissues,andtheshuntactivepowerfilterthedesign.Summarizesthecurrentseveralmainstreamharmonicdetectioncircuit,thefinalselectionisbasedonLA50-PshuntAPFcurrentsensorasacurrentsensingelement,adetailedanalysisofitsbasicprincipleanddesignedthecurrentsignalconditioningcircuitry.WhiletheDSPoutputcurrentcannotdriveAPF,itwasdesignedwith75,451chipsasthecenterofthedrivecircuit,whilethedesignofisolatedDCpowersupplycompletedAPFhardwaresystemdesignandcommissioning.
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