High Performances Supercapacitor Recovery System including Power Factor Correction for Elevators

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1、HighPerformancesSupercapacitorRecoverySystemIncludingPowerFactorCorrection(PFC)ForElevatorsC.Attaianese-V.Nardi-F.Parillo-G.TomassoDepartmentofAutomation,Electromagnetism,ComputerScienceandIndustrialMathematicsUniversityofCassino,viaG.DiBiasio43,I-03043Cassino(FR)-ITALYtel.+3907762993685

2、fax.+3907762993734E-Mail:attaianese@unicas.itKeywordsSupercapacitors,buck-boostconverter,PFC,energyrecovery,motionsystems.AbstractInthispaperanovelandhighefficiencyconversionsystembasedonaSupercapacitorRecoverSystem(SRS)andaPowerFactorCorrectioncircuit(PFC)isproposedandtested.Itallowstog

3、reatlyimprovetheperformancesofmotionsystemsforresidentialapplication,suchaselevators,bothintermsofenergyefficiencyandpowerdemand,allowingthecompliancewiththerecentsinternationalstandardsonpowerquality.IntroductionRecentresidentialapplicationsofelectricaldriveshavetobecharacterizedbyhighp

4、erformancesintermsofefficiencyandcompliancetointernationalstandards,suchasIEC-1000-3-2andIEEE-519.Inparticular,intheelevatorfield,themarketrequiresapartfromtherespectoftheabovestandardsbothanincreaseofthedriveefficiencyandareductionofthemaximumpowerdemandfromtheutility.Theachievementofth

5、eabovetargetsdeeplyinfluencesthestructureoftherequiredconversionsystem.Inparticular,aninterfacecircuitwhichperformsthepowerqualitycontrolandatthesametimeincreasesthedriveefficiencyhastobeused.Startingfromthepowerqualitycontroltheuseoffront-endinverterallowseasilyachievingpowerqualitycont

6、rol[1]-[9].Thissolutionallowseliminatingthebrakeresistor,butitoftendoesnotofferarealeconomicadvantagefortheenduserbecausemanyutilitiesdonotpermittocapitalisethesavingsduetotheenergyrecovery.Aninterestingalternativesolutioncanberepresentedbytheuseoftwodifferentcircuits:aPowerFactorCorrect

7、ion(PFC)[10]-[18]forthepowerqualitycontrolandasupercapacitorenergystoragesystemtobothincreasethemotionsystemefficiencyandatthesametimeeliminatethebrakeresistor.Besidesthissolutioncanbeeasilyusedtocontrolthepowerdemandfromutilityandconsequentlyreducethecostbothoftheutility