高压多电平逆变器控制策略研究及其建模
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摘要
目前,随着电气传动技术的发展,大容量传动的高压变频调速技术在交流电机驱动领域得到了普遍的应用。多电平逆变器和传统的两电平逆变器相比较而言具有输出电平数多,输出波形更逼近于正弦波等特点,成为该领域研究的热点。
本文分析了二极管箝位式多电平逆变器、电容箝位式多电平逆变器、级联式多电平逆变器的工作原理和特点;论述了三角载波层叠法、特定谐波消去法、载波移相法、多载波PWM法、基于自由度组合控制的PWM法、单元矢量移相空间矢量脉宽调制法等七种控制策略的基本控制原理;并在第三章详细研究了二极管箝位式三电平逆变器带中点电位控制的空间矢量脉宽调制算法,实现了中点电位平衡;第四章提出了一种新型的级联式多电平逆变器拓扑结构并研究了其空间矢量控制算法;同时在MATLAB/SIMULINK环境下对这两种多电平逆变器系统进行了建模仿真。仿真结果表明,这两种多电平逆变器的输出线电压、线电流比较接近正弦波,从而证明了这两种控制算法的有效性。
With the development of electric-driver technology, high voltage frequency conversation timing technology of large capacity driving has been applied widely in the field alterating current motor driving. Multi-levels inverter has become a researchful hotspot in this field due to the peculiarity that it has multi output levels and its output wave is more close in upon sine wave, etc, compared with two-levels inverter.
The principle and characteristc of diode-clamping multi-levels inverter, capacity-clamping multi-levels inverter, cascaded multi-levels inverter are analyzed in this dissertation. Several control-strategies of multi-levels inverter are discussed. These control-strategies are Sub-harmonics PWM, Special harmonic elimination PWM, Phase chifted carrier PWM, Multi-carrier PWM, Selected harmonic elimination, Based on Control Degrees of Freedom PWM, a Phase Shifting space vector modify. The arithmetic of Space Vector Pulse Width Modify applying in diode-clamping inverter is studied particularly in the third chapter, the controlling of midspot voltage is embedded in the arithmetic which makes the midspot voltage in blanace. A new topology structure of cascaded multi-levels inverter is given, and the arithmetic of Space Vector control is researched in detail in the fourth chapter. At the same time, the models of these two inverters system are founded and simulated in the condition of MATLAB/Simulink. According to the simulation output wave of these two inverters, the conclusion that the wave of output line-voltage and line-current are comparatively close to the sine-wave is made, which proves the effectivety of these two control arithmetics.
本文分析了二极管箝位式多电平逆变器、电容箝位式多电平逆变器、级联式多电平逆变器的工作原理和特点;论述了三角载波层叠法、特定谐波消去法、载波移相法、多载波PWM法、基于自由度组合控制的PWM法、单元矢量移相空间矢量脉宽调制法等七种控制策略的基本控制原理;并在第三章详细研究了二极管箝位式三电平逆变器带中点电位控制的空间矢量脉宽调制算法,实现了中点电位平衡;第四章提出了一种新型的级联式多电平逆变器拓扑结构并研究了其空间矢量控制算法;同时在MATLAB/SIMULINK环境下对这两种多电平逆变器系统进行了建模仿真。仿真结果表明,这两种多电平逆变器的输出线电压、线电流比较接近正弦波,从而证明了这两种控制算法的有效性。
With the development of electric-driver technology, high voltage frequency conversation timing technology of large capacity driving has been applied widely in the field alterating current motor driving. Multi-levels inverter has become a researchful hotspot in this field due to the peculiarity that it has multi output levels and its output wave is more close in upon sine wave, etc, compared with two-levels inverter.
The principle and characteristc of diode-clamping multi-levels inverter, capacity-clamping multi-levels inverter, cascaded multi-levels inverter are analyzed in this dissertation. Several control-strategies of multi-levels inverter are discussed. These control-strategies are Sub-harmonics PWM, Special harmonic elimination PWM, Phase chifted carrier PWM, Multi-carrier PWM, Selected harmonic elimination, Based on Control Degrees of Freedom PWM, a Phase Shifting space vector modify. The arithmetic of Space Vector Pulse Width Modify applying in diode-clamping inverter is studied particularly in the third chapter, the controlling of midspot voltage is embedded in the arithmetic which makes the midspot voltage in blanace. A new topology structure of cascaded multi-levels inverter is given, and the arithmetic of Space Vector control is researched in detail in the fourth chapter. At the same time, the models of these two inverters system are founded and simulated in the condition of MATLAB/Simulink. According to the simulation output wave of these two inverters, the conclusion that the wave of output line-voltage and line-current are comparatively close to the sine-wave is made, which proves the effectivety of these two control arithmetics.
引文
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[8]杨庆柏.高压变频器的类型及其特点[J].仪器仪表与分析检测,2003.36-38
[9]吴洪洋,何湘宁.高功率多电平逆变器的研究和应用[J].电气传动,2002.2:7.12
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[18]王鸿雁,张超,王小峰等.基于控制自由度组合的多电平PWM方法及其理论分析,中国电机工程学报,第26卷第6期,2006年3月:42-48
[19]付超,石新春,王毅.级联型逆变器的空间矢量移相调制方法,电力电子技术,第39卷第5期,2005年10月:52-53
[20]吴洪洋,何湘宁.多电平载波PWM法与SVPWM法之间的本质联系及其应用.中国电机工程学报,2002,22(5):10-15
[21]张桂斌,徐政.最小开关损耗VSVPWM技术的研究与仿真.电工技术学报,2001,16(2):34-49
[22]高永军,曾光.采用空间矢量PWM方法的三电平逆变器研究.电力电子技术,2000.第1期:10-13
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[24]崔俊国,陶生桂.一种五电平逆变器SPWM控制方法的分析与仿真[J].电气传动,2005.5:18-22
[25]齐悦,杨耕,窦曰轩.基于多电平变换逆变电路的拓扑分析[J].电机与控制学报,2002.3:74-79
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[30]唐伏良,庄朝晖,熊有伦.一种新型的多电平逆变拓扑研究[J].中国电机工程学报,2000.12:11.14
[31]吴志红,陶生桂,崔俊国,毛明平.二极管箝位式多电平逆变器的拓扑结构分析[J].同济大学学报,2003.31(10):1217-1222
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[33]Ang.Gil Lee;Dae.Wook Kang;Yo.Han Lee;Dong.Seok Hyun.The carrier.based PWM method for voltage balance off lying capacitor multilevel inverter.Power Electronics Specialists Conference,2001.PESC.2001 IEEE 32nd Annual,Volume:1,17.21J une2001 P ges:126-131 vol.1
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[35]薛俊伟,王庆贤.一种多电平逆变器的分析方法与仿真,兰州交通大学学报(自然科学版),第25卷第3期,2006年6月:100-102
[36]彭方正,钱照明等.现代多电平逆变器拓扑,交流技术与电力牵引,5/2006.6-11
[37]Van,Der.Broeck,Hans.Christtoph Skudelny,G.V.Stank,Analysis and Realization of a Pulse width Modulator Based on Voltage Space Vectors,IEEE Trans.on IA,1988,24(1):142-150
[38]Bum.Seok Suh,Dong.Seok Hyun,A new n.level high voltage inversion system,IEEE Trans.on Industry Electronics,19 97,44(1):10-11
[37]R.Sommer.A.Mertens,M.Griggs.H..J.Conraths,M.Bruchmann,T.Greif.New Medium Voltage Drives Systems Using Three.Level Neutral Point Clamped Inverter with High Voltage.IEEE Proceedings Power Applieations,2000,23(4):30-31
[39]Li Weibo,Mao Chengxiong,Lu Jiming,etal.Simulation and realization of the filter for high power NPC inverter[A].IEEE/PES.CSEE International Conference On Power System Technology Power Con[C].Kunming,China,October 13.17,2002,1:588-589.
[40]To lbert L,Habet ler T G.Novel Multilevel Inverter Carrier.based PWM Method[J].IEEE Trans.On IA,1999,35(5):1098-1107
[41]蒲宝中,苏彦民,马学亮.多电平最优空间矢量PWM调制方法的研究.中国电机工程学报,2002.22(2):89-92
[42]田亚萍,何继爱,黄智武.电压空间矢量脉宽调制(SVPWM)算法仿真实现及分析.电力系统及其自动化学报,2004.(4):68-71
[44]蒲宝中,刘卫国,罗兵.单元串联多电平逆变器PWM方法比较研究.电力自动化设备,2004.24(2):84-87
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