基于IGBT的鏈式SVG的關(guān)鍵技術(shù)的研究.pdf

1、東南大學碩士學位論文基于IGBT的鏈式SVG的關(guān)鍵技術(shù)的研究姓名：蔡學波申請學位級別：碩士專業(yè)：控制科學與工程指導教師：章國寶20120327AbstractComparedtothemultipletopologycascadeSVGgraduallybecomesthetrendofreactivepowercompensationbecauseofithasnozigzagtransformerlowerswitchingfreq

2、uencyrapidresponsespeedandlowerharmonicInmiSpaperthemaincircuittopologybasedoncascadeHbridge，PWMandthekeytechnologiesofcontrolarealldetailedstudiedandasmall—capacityexperimentprototypeisdesignedFirstlythemaincircuitstruc

3、tureofSVGcombinedwimthedesignrequirementoflargecapacityisstudiedTheadvantagesanddisadvantagesofthemultipleinverterandmultilevelinverterareanalyzed，andthemainthreekindoftopologyarestudiedAtlast，cascadeHbridgeinverterischo

4、seThenoperatingcharacteristicsofcascadeHbridgeSVGisanalyzedandmathematicalmodeliSmodeledTheinstantaneousreactivepowertheorytheoreticalbasisofSVGisintroduced，andharmonicdetectioninsinglephaseisdeeplystudiedPWMisoneoftheke

5、yfactorsdeterminingcompensationeffectItpresentsahybridSPWMcombinedwimcarderphaseshiftedSPWMandcarrierlayeredSPWMDCcapacitorvoltagesofcascadeHbridgeSVGareindependentThebalancecontrolofDCcapacitorvoltageCanistwostep：thetot

6、alactivepowerandthedistributionbetweeneveryHbridgesThepaperpresentsanewcontrolstrategybyphasefinetuningSystemvoltageimbalancecontrolisanotherkeyfactorofcascadeHbridgeSVGThecontrolissueisanalyzedunderunbalancedsysteminthe

7、paperandtheindividualphasecontrolstrategyisproposedThenfaulttolerantcontrolstrategyisstudiedFinallyanexperimentprototypeofcascadeHbridgeSVGisbuiltandthedesignofsoftwareandhardwareiscompletedAlargenumberofexperimentalrese

8、archesaremadeItprovesproposedmethodsinthispaperthatalefeasibleandeffectiveAbriefsummarizeismadeandthefollowingresearchworkisputforwardKeywords：cascadeHbridge，hybridSPWM，thebalanceofDCcapacitorvoltage，theindividualphaseco