基于upqc改善微网电能质量策略研究

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1、ABSTRACT-_—————____—_●___-—————_●-_——_———-__-———————●I__-_———-●—————●_-——’——●--——————-_————’__●_—————_●_————_一————_———一———————_———————————__一ABSTRACTInordertocopewiththecrisisofenergyandoptimizeene蜡ystructure，themicro’铲ldhasobtainedarapiddevelopmentiIlrecentyears．Aseries

2、ofkeytec圭111()logiesassociatedwithmicro—gridhasbecomeahotresearch，powerqual“yanalysisandcontrolisoneofthekeytechnologies．Duetotheparticularityofmicro一铲idsystemitsel￡itspowerqualityisnotonlyconnectedw“htheoperationcharacteristicsofintemaldistributedpov，er，sto]FagedeVicean

3、dload，butalsohasinteractiVee丘．ectofextemaldistributionnetwo订(．AI：cordillgtothefeatureofmicro—gridpowerquality；Uni矗edPowerQualityConditioner(UPQC)isusedtocomprehensivecontrolofmicro一铲idpowerquality，thedetectionandcontrolstrategyisresearchedtoiII】proVemicro—gridpowerqualit

4、ybasedonUPQCinthispaper．F叠stly；thebasicstllJctureofmicro—gridsystembasedUPQCisintroducedandthetopologystrllctureofUPQChybridenergystorageunitisstu(1ied，thenlathematicalmodelsofUPQCseriesunit，parallelunitandhybridene曙ystorageunitareestablishedrespectiVely，thecontrolprinci

5、pleandgoalofUPQCtoimproVemicro··gridp()werqualityaureclari6edmrtherly．SecondlMthedetectionmethodofiIlstructionV01tageandcu玎ents远nalsforUPQCoutputisresearched．Itisdi瓶culttoapplytraditionalphase—10ckedloopw韭lendistributionnetworkVoltagehasunbalanceanddistortion，thetwodetec

6、tionmethodsofiIlstructionVoltagebasedonPark缸ansformationandresonantcontrolwithoutphase-10ckedloopareresearched洫thisp印er．Accordingtothei11herenttimedeIayofdigita．1syste】[n，thedetectionmethodofi11stmctioncun．entbasedonadaptiVepredictionisstudied．T}lrou曲theirnproVementofmat

7、rixC，adetectionmethodofinstmctioncurrent内rthegradedcolnpensationisproposed，itissuitablef-ort

8、lree—phaseunbalancedloadthatcontainanyharmoniccomponent．ThedirectandiIldirectpredictionmethodsofiIlstruc：tioncurrentfor如11c011巾ensationarecoInpared丘omthetwoaspectsofsteady-statea

9、ccuracya11ddynamicresponsespeedrespectiVely：Forthepowerfluctuationsofmicro—gridcausedbyintennittentpowe