摘要：交流传动是我国铁道牵引动力发展的一个重要方向，交—直—交变流器包括四象限整流器环节、中间直流环节和三相逆变器环节。交—直—交型动车组系统的原理是：先将从接触网获得的单相交流高电压经变压器降压后，再经整流器变换为平稳的直流电压，直流电压经逆变器变换为三相交流电压，供给机车轮对上的牵引电机。
数学模型是对动车组三电平变流器系统进行研究的理论基础，本文建立了单相三电平整流器主电路的数学模型，数学模型的建立对基于该三电平拓扑的各种控制策略和仿真研究打下了基础。
最后，本论文利用MATLAB/SIMULINK的软件平台，建立了三电平变流器系统的仿真模型。对单相桥式全控整流电路、三相桥式全控整流电路、三相电压型SPWM逆变器和三电平牵引变流器等进行了仿真研究，并得到了仿真结果。5806
关键词： 动车组；三电平；变流器；数学模型；仿真；
MODELING ANALYSIS AND SIMULATION OF EMU THREE-LEVEL TRACTION CONVERTER
ABSTRACT: AC-DC-AC drive system is an important aspect in our railway commute drive.AC-DC-AC converter include four-quadrant rectifier link, DC link and three-phase inverter link. The principle of AC-DC-AC locomotive is that transformer transforms the high single-phase AC voltage from contact system to lower AC voltage first, then rectifier transforms this AC voltage to steady DC voltage, finally converter transforms this DC voltage to three-phase VFVV AC voltage as the voltage source for asynchronous motor.
As we known, the theory basis of researching Electric Motive Units (EMU) three-level converter system is mathematical module. Therefore, in this paper it sets up the main circuit mathematic model of single-phase three-level rectifier, switch model of diode clamped three-level inverter. The establishment of mathematic model laid the foundation for the study of various control strategies and simulation based on this three-level topology.
This paper analyses the basic principle of EMU three-level traction converter in detail. Instantaneous current control algorithm and SPWM algorithm are presented to single-phase four-quadrant rectifier, and for the three-level rectifier SPWM principle carried out a detail analysis.
At the end of this paper, with the application MATLAB/SIMULINK software, it has established the three-level converter system simulation model. It makes the simulation research on single-phase three-level rectifier simulation model and three-phase voltage type SPWM converter and three-phase three-level inverter simulation model and so on, has obtained the simulation result.
Key words: EMU; three-level; converter; mathematic model; lation;
目  录
1 绪论    1
1.1 课题的研究背景及意义    1
1.2 交流传动技术的发展    3
1.2.1 电力电子器件的发展    3
1.2.2 电力牵引传动控制策略的发展    3
1.2.3 控制元件的发展    3
1.3 本文研究的主要内容    4
2 动车组三电平牵引变流器系统分析    5
2.1 单相四象限PWM整流器的工作原理及系统分析    5
2.1.1 PWM整流器的基本工作原理    5
2.1.2 单相三电平四象限PWM整流器的系统分析    7
2.2 三相三电平逆变器的主电路结构及空间矢量分析    8
2.2.1 三电平逆变器的主电路结构    8
2.2.2 三电平逆变器空间矢量分析    8
3 动车组三电平变流器数学建模    13
3.1 单相三电平整流器数学模型    13
3.2 SPWM控制技术    14
3.2.1 SPWM波形的原理及产生    14 MATLAB高速动车组牵引变流器的分析与仿真:http://www.youerw.com/tongxin/lunwen_2999.html