小功率全橋雙向電流源高頻鏈光伏戶用逆變器研究.pdf

1、上海交通大學博士后學位論文小功率全橋雙向電流源高頻鏈光伏戶用逆變器研究姓名：項安申請學位級別：博士后專業(yè)：電力電子與電力傳動指導教師：潘俊民20031201上海交通大學博十后工作報告ABSTRACTABSTRACTWiththedevelopmentofeconomy，improvementofpeasantsandherdsmen’Slifeandpopularizationofhouseholdappliance，therequir

2、ementsforphotovoltaiCACpowersourcewillincrease，AsthekeypartsofphotovoltaicACpowersource，therequirementforbetterphotovoltaieinverteralsoincreasegraduallySothefuturemarketofphotovoltaicinverterwithlow—cost，highqualityandhi

3、ghreliabilityisbrightTherearetwotypesphotovoltaicinvertersforfamilyuseatpresentOneisvoltageliftwithlinefrequency(50／60Hertz)FirstitconvertsDCfrombatteryto50／60HzAC，thenitliftsvoltageto220voltACwithlinefrequencytransforme

4、rThedisadvantagesofthistypeinverterareitsbigsizeandpooradaptableabilitytoloadchangeAnotherisforwardmodehighfrequencylinkinverterItusesthree—stageconversion，DC—AC，AC—DC，DC—AC，outputsonephase220voltACThedisadvantagesofthis

5、typeinverterareuseofmorecomponentsandmorecomplexstructurebecauseofitsthree—stageconversionInrecentyears，anewconversiontechniquehasattractedattentionofresearchersSeveraltopologieshavebeenproposedegfullbridgecurrentmodehig

6、h—frequencylinkinverters，pushpullcurrentmodehigh—frequencylinkinvertersCurrentmodehigh—frequencylinkinvertersarebasedonflybackDCDCconverters，ThecircuitworksindiscontinuousorcontinuousmodeofinductorcurrentThecircuittopolo

7、gyofeachworkmodeisflybackDC—DCconverterItownsthefollowingadvantages：simplercircuittopologyfewercomponents，simplercontrolscheme，betterdynamicresponseandhigherefficiencyItisverysuitableforphotovoltaicinverterFirstly，discon

8、tinuouscurrentmodeandcontinuousmodeofflybackconvenerisanalyzedandsimulatedTheresultshow也atthepeakcurrentandFillscurrentofpowerswitchesincontinuouscurrentmodeisreducedsharplycomparedwiththatindiscontinuouscurrentmode，whic

9、hisveryimportantforimprovingtheconverterefficiencyTheresultalsoshowsthattheconvenerwithPIDcompensatorcallachievegooddynamicperformanceBasedonthetheoriesdiscussedabove，a200Wfullbridgecontinuouscurrentmodehighfrequencylink

10、inverterisdesignedPhilipsmicrochipcomputerisusedtoimprovetheperformanceoftheinverterandreducethecost111esimulationandexpefimentresultshowthattheinverterprototypehavetheadvantagesofsimpletopologyhighefficiencyandsuitablef