高壓變頻器控制策略的研究.pdf

1、湖南大學碩士學位論文高壓變頻器控制策略的研究姓名：郭建平申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：歐陽紅林20080410AbstractHighvoltageACdrivesystemshavebrightprospectinhighpowerpumpsand￡ms，rollingmill觚dsoon，whereusingadjustablespeedschemec鋤notonlysaveenergygreatlyb眥als

2、oimprovethedynamicperformanceofthemotorWiththedevel印mentofhighv01tageandlargecurrentdeVice，multileVerinVerterbecomesthemostpopulartopologyinhighVoltageadjusta_blespeedschemeThemaincontentsareshownfollow：Thispaperdescribe

3、sthevarioushighvoltageconVenertopology，andadetailedstudyofCascadeHighvoltageconveIrtertopology’introducedintheinVeftermainparts：powerunitInordertoimproVethev01tageinVerterdesignofthebypassreliabilityofhighVoltageinVerter

4、，ahighThispaperintroducedthetwohighvoltageinVertercontrolstrategy：SPWMSVPWMcontroltechnology鋤dcontroltechnology，SPWMtechnology缸oughaseriesofpulsewidthmodulation，equiValenttoaccesstothenecessarywaVelonns(includingtheshape

5、andamplitude)Withmulti—leVelinVertertopologyoftheproposedsymbiotic，notonlybecauseitdecidedthemultileVelinVenerrealizeitornot。觚dthemulti1evelvoltageinVerteroutputwaVefomquallty，actlVe如dnoncircuitSourcesofStressdeVice，thes

6、ystemlossreductlon齟demclencyimprovementshaveadirectimpactThenontheSVPWMwiththelnd鋤entalprinciplesandmodulationmethods，inthebasicmethodSPWMtechnologySVPWMca玎ierphaseshiftingtechnology鋤donthebasisofthespacevectorinarowofsv

7、mmetricalswitchmodulationmethods(QiduanLaw)and，alternately，andothervectorswitchOptimizationofthefrequencyofseVeralmethodsusedtophaseshi代voltagevectorspace，butalsogivesaspecificmethodThearticlefinallygiventhehighV01tagein

8、Verterandthehardwarcstructuredesignedby6KV900KWunitCascadeHigh—VoltagepowerconVerterexpenmentalwaveforms，themnningoftheindicatorshaVereachedthetargetKeyWords：cellsinseries；highVoltagefrequencyconVerter；topology；SPWM；SVPW