三相多电平变流器电压平衡、箝位策略与调制技术研究

《三相多电平变流器电压平衡、箝位策略与调制技术研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、y1213620洳；：j、嘧博士学位论文论文题目三担墨电王变近墨皂匡垩煎!丑鱼筮喳堑必剑壁查婴窥作者姓名——三——尘—J垦——一指导教师——童L—担上堑—攫学科(专业)—』已尘旦王皇鱼』篮il一所在学院——』量鱼王墨堂堕——提交H列2QQ2至Q2旦针对滞环电流控制在多电平变流器中的应用，本文以有源电力滤波器系统为仿真平台，采用无偏置量滞环电流控制对以飞跨电容型变流器为主变换器的有源滤波器系统进行仿真研究其响应特性；并对基于空间矢量概念的滞环电流控制在三相四桥臂三电平变流器的应用进行探讨和仿真分析，通过判断电压矢量所在的大区间，部分消除了无效的开关组合，减少了开关次数

2、。论文最后对全文工作进行了总结，并对电压型多电平变流器的今后研究工作进行了展望。关键词：多电平变流器，载波PWM方法，拓扑，混和箝位，滞环电流控制，整流器2AbstractVoltage—sourcemultilevelconverters(VSMC)arevaluableandbecomeresearchinghotspotsfortheirmultileveloutput，lowTHDandthelargepotentialapplicationsinlli曲一voltageandhi曲一powerfields．Althoughtherearequiteafew

3、oftheindustrialapplicationsofVSMC，theresearchworkisfarfromstopduetoitsvariouscategoriesandcomplicatedstructures．Thisthesisfocasesonthecarrier-basedPWMmethodssuitableforthef1)，ing—capacitormultileveltopology(FCMT)，thevoltagebalanceproblemofDCcapacitorsofconventionaldiode·-clampingtopolo

4、gy,thecontrolofthree-phasethree—levelrectifier(VmNNA)andtheapplicationsofhysteresis-currentcontrolinmultilevelconverters．AccordingtothecharacteristicsofPDPWMandPSPWlVl，combiningthebalanceprincipleofFCMT,thecarrier-rotatedPWMmethodisbuilt．Theharmonicscharacteristicsisderivedessentiallya

5、ndquantativelybyusingdualFFTandprovedinthethree—levelandfive—levelinvertersiniulationandthree—levelinverterexperimentathi曲andlowmodulationindices，Theresultsofderivation．simulationandexperimentinthree—levelinvertershowtheSalrleharmonicsperformanceessentiallyforthecarrier-rotatedPWMmetho

6、dandPDPWM．Fortheirphasevoltage，mostoftheharmonicenergyintheswitching—frequencypointanditssidebandconcentratesattheswitchingfrequency,andthisharmoniccomponentwillbecanceledintheline—linevoltge．Therefore，theharmonicsareeasytobefilteredandthebestharmonicsperformanceachieved．ComparingwithP

7、SPWM，thecarrier—rotatedPWMmethodCannotonlyincreasetheequivalentSwitchingfrequencyandbalancethevoltageofthefl姐ngcapacitors，butleadstomuchlowerharmonicsattheswitchingfrequencyofoutputline-linevoltagebecausethereisnophaseshiftbetweenthecarriers．Thisthesisalsoresearchesthepossibleapplica