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．Aseriesofkeytec圭111(

2、)logiesassociatedwithmicro—gridhasbecomeahotresearch，powerqual“yanalysisandcontrolisoneofthekeytechnologies．Duetotheparticularityofmicro一铲idsystemitsel￡itspowerqualityisnotonlyconnectedw“htheoperationcharacteristicsofintemaldistributedpov，er，sto]FagedeViceandload，butalsohasinteractiV

3、ee丘．ectofextemaldistributionnetwo订(．AI：cordillgtothefeatureofmicro—gridpowerquality；Uni矗edPowerQualityConditioner(UPQC)isusedtocomprehensivecontrolofmicro一铲idpowerquality，thedetectionandcontrolstrategyisresearchedtoiII】proVemicro—gridpowerqualitybasedonUPQCinthispaper．F叠stly；thebasic

4、stllJctureofmicro—gridsystembasedUPQCisintroducedandthetopologystrllctureofUPQChybridenergystorageunitisstu(1ied，thenlathematicalmodelsofUPQCseriesunit，parallelunitandhybridene曙ystorageunitareestablishedrespectiVely，thecontrolprincipleandgoalofUPQCtoimproVemicro··gridp()werqualityaur

5、eclari6edmrtherly．SecondlMthedetectionmethodofiIlstructionV01tageandcu玎ents远nalsforUPQCoutputisresearched．Itisdi瓶culttoapplytraditionalphase—10ckedloopw韭lendistributionnetworkVoltagehasunbalanceanddistortion，thetwodetectionmethodsofiIlstructionVoltagebasedonPark缸ansformationandresona

6、ntcontrolwithoutphase-10ckedloopareresearched洫thisp印er．Accordingtothei11herenttimedeIayofdigita．1syste】[n，thedetectionmethodofi11stmctioncun．entbasedonadaptiVepredictionisstudied．T}lrou曲theirnproVementofmatrixC，adetectionmethodofinstmctioncurrent内rthegradedcolnpensationisproposed，iti

7、ssuitablef-ort

8、lree—phaseunbalancedloadthatcontainanyharmoniccomponent．ThedirectandiIldirectpredictionmethodsofiIlstruc：tioncurrentfor如11c011巾ensationarecoInpared丘omthetwoaspectsofsteady-stateaccuracya11ddynamicresponsespeedrespectiVely：Forthepowerfluctuationsofmicro—gridcausedbyinte

9、nnittentpowe