双级四脚矩阵变换器的分析

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1、ABSTRACT．nlet、Ⅳo．stagema仃ixconVerterisanewtypeofthematrixconVeIrterbasedon恤eephaseAC-DC-AC似。一s切getopologicals仃uctureandhavemlysicalreCtiferandinverterwhichissimilartothetraditional廿1reephaSeAC．DC．ACconverter．Foritsfunctionswithatwo-waynowofene唱y，sinusoidalinputandoutputcurrent，andcontr01lablei

2、Ilputpowerf．actor，withoutinte衄ediateene玛ystoragec印acitaIlce，itisapotentialmatriXconVe哟rwith900dprospeCt．But证nomlalapplications，thereusuallyexsiststhree-phaSeunbalencedloadsordemandsthree-ph2usefou卜wiressystem．Sincethetwo—stagem删xconVerterc籼otproVlderoadforzerosequencecurrent，ithaSbeenlimitedto

3、applytosuchsituations．Thetwo．stagefour-legmatrixconverterisderivedf两mthetraditional似o．stagema仃iXconverterbyaddinganeutrallegiIltheinverterstage．As让Ieneu_tralleginthet、7旧一Stagef．our_legmatr议convenerc趾providetheroadforzer0sequencecurrent，tllereforethetv旧．stagefour-1egmatriXconverterisve巧sui诅blei

4、nthree-ph2usefour_wires印plications．Thetopolog)，ofthet、Ⅳo-s切gefour-legmat漱andthemodulationmethodswerestudiedatfirst协thisp印er，mathmodelofthe铆。一stagefou卜1egm砷ri)【converterbaSedonaVerageinswitChmgperiodswaSalsobuilt．Thepaperalsoanalysedtheinnuenceofunbalencedloadst0theinputcu玎entSinsteadystate．The

5、close-loopC0n_trolstrategyandthedesignoftherepetitivecontrollerforthissystemwaspresented，theresultsofnumericsimulationb弱edonMatlabsimulinl【toolboxdemenstratesthecorrectIlessandfeaSibili哆ofthecon仃ols仃ategy．Thepaperanalysedthenolinearf-aCtorsi11practicaltwo-stagefour-legma仃i)(conVerterauldpropos

6、edv撕ouScompensationstrategies．Atl嬲t，thecarriermodulationandcon仃olalgorithmwereimplementatedonal0K、厂Aprototype，theresultsdemenstratesthecorrectnessandfeasibilityof也emodulations仃ategyandthecontrolalgorit№．KEYWORDStwo—stagefour-legmatrixconVerter，three—phaSeⅡfour-wiressystem，c跚iermodulationstrate

7、gy，repetitiVecontrol目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．IABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯II目录⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．Ⅳ第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．1课题的选题背景及意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2国内