文档名：基于参考电压修正的双级矩阵变换器DeltaSigma调制
摘要：Delta-Sigma调制(DSM)可在无需随机过程统计特性和复杂谐波理论分析的基础上,依托其过采样特性实现电力电子变换器变频调制.双级矩阵变换器(TSMC)作为一种理想的"全硅"交-交变换器,若能够将DSM引入TSMC,可进一步优化其电磁干扰(EMI)水平和运行效率,但TSMC的直流链电压波动问题导致TSMC-DSM策略难以直接实现.针对TSMC-DSM实现问题,该文提出一种基于参考电压修正的DSM策略.在所提方法中,通过解析TSMC整流级调制过程,将逆变级参考电压按照整流级矢量作用顺序进行修正,并依次获得各扇区参考电压修正系数.最后,在两相坐标系下分别构建两个DSM调制器,并将修正后的逆变级电压参考值引入DSM调制器以实现高性能TSMC-DSM策略.实验结果表明,所提策略能够对输出电压、电流频谱进行合理整形以减少系统对外部的电磁干扰,同时具备优良的电压传输比和动态调制性能.
Abstract：Atwo-stagematrixconverter(TSMC)hastheadvantagesofaconventionalmatrixconverter,suchasnoDC-buscapacitance,flexibleenergycontrol,andacompactstructure.Moreover,itsimplifiesthemodulationprocesswhileavoidingthecomplexfour-stepcommutationmechanismofdirectmatrixconverters,becomingapotentialpowerelectronicstopology.Currently,thevoltagetransferratioofTSMCusingtheclassicalmethodcannotexceed0.866,andtheelectromagneticnoisecausedbyvoltageharmonicneartheswitchingfrequencyisrelativelyconcentrated.Accordingtothespecificmathematicallaws,thespreadspectrummodulationtechnologytransformsPWMwaveformsintoirregularpulsesequences.Itimprovesthevoltagetransferratioandexpandstheoutputvoltagespectrumtoawiderrange,therebyreducingoutputharmonicsandelectromagneticnoise.However,TSMChasalargenumberofpowerswitches,anditsswitchingcoordinationbetweentherectifierandinverterstageiscomplex.TherearestillmanykeyissuestobeaddressedinthespreadspectrummodulationtechnologyofTSMC.Consideringthesimplestructureandwithoutcomplexrandomstatisticalcharacteristics,Delta-Sigmamodulation(DSM)cansignificantlyoptimizetheoutputspectrum,reducetheEMIlevel,andoptimizetheoperationalefficiencyofthepowerconverter.However,themodulationstrategyofTSMCcanbedividedintorectifier-stagealgorithmsandinverter-stagealgorithms.TheabsenceofaDC-linkcapacitorofTSMCleadstofluctuationsinDC-linkvoltage.TheDSMoftheinverterstagecannotaccuratelyquantifyandtrackthefluctuationpatternsofDC-linkvoltage,makingitdifficultforTSMCtodirectlyimplementDSMintheinverterstage.ThispaperproposesaDSMschemewithreferencevoltagecorrection(RVC-DSM).Firstly,theoperationprincipleofDSMindicatesthatastheorderLofDSMincreases,thesuppressioneffectonlow-frequencyharmonicsofvoltageisbetter,andthemodulatorresolutionissignificantlyimproved.Specifically,theDSMresolutionisincreasedbyL+0.5bitswhenitsoperatingfrequencyisdoubled.Then,toensurethevoltageutilizationofTSMC,therectifierstagestilladoptsSVMwithoutzero-vector,andDSMisonlyemployedontheinverterstagetoachievespreadspectrummodulation.Meanwhile,limitingtheswitchingfrequencyforswitchinglossreductionandsolvingtheproblemofvoltagetrackingarenecessary.Thispaperutilizesthe"Voronoiquantizer",shapedlikeaVoronoidiagramasthevectorpartitioningrule,toimplementtheDSMstrategyofTSMC.Finally,combinedwiththemodulationtarget,thecompensationcoefficientsoftheDSMunderdifferentDC-linkvoltagesareobtainedbyanalyzingtheDC-linkvoltagefluctuationindifferentsectors.Furthermore,thecompensationcoefficientsareallocatedtothereferencevoltageinreal-timetoeliminatetheimpactofDC-linkvoltagefluctuationsonDSM,achievingefficientspreadspectrummodulationofTSMC.Experimentswerecarriedoutontheplatformwithadual-corecontrollerof"FPGA+DSP"toverifytheproposedRVC-DSM.Theexperimentalresultsshowthattheharmonicsoriginallyrelatedtotheswitchingfrequency(5kHz,10kHz,…)underSVMmodulationhavebeensuppressed,andthispartofharmonicenergyhasbeenextrapolatedtothehigh-frequencyband.Thelow-passcharacteristicsoftheinductanceloadeffectivelyreducetheconductedinterferenceofTSMCinthe0～30MHzband.Atthesametime,RVC-DSMdirectlyemploysthebasicvoltagevectoroftheinverterstage,ensuringgoodoperatingperformanceintheover-modulationregion.Finally,benefitingfromitsspectrum-shapingeffect,theoperationalefficiencyoftheRVC-DSMstrategyismuchhigherthanthatoftheSVMstrategy.Thefollowingconclusionscanbedrawnthroughtheoreticalanalysisandexperimentalverification.(1)ByutilizingthespectrumshapingabilityoftheRVC-DSMmodulator,thehigh-frequencyharmonicsnearswitchingfrequenciesanditsoctavecomponentsaresignificantlyreduced.(2)RVC-DSMcandirectlyusethebasicvectoroftheinverterstage.Itstheoreticallimitvoltagetransmissionratiofluctuatesbetween1.0and1.155,improvingtheTSMCvoltagetransmissionratio.(3)TheswitchingfrequencyofRVC-DSMisdirectlyrelatedtoitscontrolperiod.Byadoptingashortercontrolperiod,thetrackingperformanceofthealgorithmisbetter,andEMIcanbeimprovedsignificantly.
作者：周湛清 谢琦坤 马朝磊 薛凌月 史婷娜 Author：ZhouZhanqing XieQikun MaChaolei XueLingyue ShiTingna
作者单位：天津工业大学高效能电机系统智能设计与制造国家地方联合工程研究中心天津300387天津大学电气自动化与信息工程学院天津300072浙江大学电气工程学院杭州310027
刊名：电工技术学报 ISTICEIPKU
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(10)
分类号：TM921
关键词：双级矩阵变换器 Delta-Sigma调制器 电压传输比 双空间矢量调制
Keywords：Twostagematrixconverter Delta-Sigmamodulation voltagetransmissionratio dualspacevectormodulation
机标分类号：TM46TM713TN761
在线出版日期：2024年5月31日
基金项目：国家自然科学基金，国家自然科学基金，国家自然科学基金基于参考电压修正的双级矩阵变换器Delta-Sigma调制[
期刊论文] 电工技术学报--2024, 39(10)周湛清 谢琦坤 马朝磊 薛凌月 史婷娜Delta-Sigma调制(DSM)可在无需随机过程统计特性和复杂谐波理论分析的基础上,依托其过采样特性实现电力电子变换器变频调制.双级矩阵变换器(TSMC)作为一种理想的"全硅"交-交变换器,若能够将DSM引入TSMC,可进一步优化...参考文献和引证文献
参考文献
引证文献
本文读者也读过
相似文献
相关博文
基于参考电压修正的双级矩阵变换器Delta-Sigma调制 Delta-Sigma Modulation of Two Stage Matrix Converter with Reference Voltage Correction
基于参考电压修正的双级矩阵变换器Delta-Sigma调制.pdf
- 文件大小:
- 2.97 MB
- 下载次数:
- 60
-
高速下载
|
|
