三相四橋臂逆變電源控制研究.pdf

1、西南交通大學(xué)碩士學(xué)位論文三相四橋臂逆變電源控制研究姓名：梁豐收申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電力電子與電力傳動(dòng)指導(dǎo)教師：郭育華20100501西南交通大學(xué)碩士研究生學(xué)位論文第1I頁(yè)AbstractThetraditionalthree—phaselnverterhasastructurewiththreearmswhenbearingwiththethree—phasesymmetricalload，thepowersupplythreeph

2、aseoutputvoltageissymmetricalbutwhenwiththethree—phaseasymmetricload，theloadneutralpotentialpointwilldrift，SOtheoutputthree—phaseisvoltagenolongersymmetricalAimingatthis，scholarshaveproposedainvertertopologyformwith3phas

3、eand4一leg3一phaseand4legstructurecansolvetheproblemofneutralpointdrift，andmaintainstheoutputvoltagesymmetry，whentheloadisasymmetricFirstly，thepaperresearchedthemathematicalmodelof3phaseand4leginabccoordinatesystemap一0coor

4、dinatesystemandthed—q一0coordinatesystem，andanalysedtheprincipleofthreephaseunbalance，establishedbisynchronousrotatingcoordinatewithab—Canddq一0coordinateThenthepaperintroducedtheprincipleof3一DSVMinab—Ccoordinatesystemfor3

5、phaseand4leginverter，andappliedittothedesigncontrol，inordertoimprovethequalityofthreephasevoltagepoweroutputandteducetheharmoniccomponentsIntheexperimentsimulation，a3phaseand4leginvertersimulationsystemwasbuilt，whichadop

6、tedthedualloopcontrolwithinnerloopusingcapacitivecurrentandouterloopusingcapacitorvoltageInthebisynchronousrotatingcoordinate，thepositivesequencecomponent，negativesequencecomponentandzerosequencecomponentoftheoutputvolta

7、gewererespectivelycontrolledSimulationswerecarriedoutinvariousloadconditions，suchasempty—load，fullload，halfload，suddenload，voltagefluctuationsatloadterminal，non—linearloadandthree—phaseasymmetricloadInordertoreflectthead

8、vantageofthe3phaseand4一leginvertersystemwithasymmetricloadthispaperestablishedathreephaseandthree—arminvertersystemwiththesamesimulationparameters，andfocusedoncomparisonbetweenthetwoatthesituationwithasymmetricloadExperi

9、mentalresultsshowthattheestablished3phase4leginverter，whichwascontroledthroughpositivesequence，negativesequenceandzerosequence，hasmanyadvantages，suchasquickresponse，highaccuracy，littleTHD，anti—interferenceability，non—lin