MATLAB动车组列车牵引变流系统关键电路的分析与仿真
我国铁道牵引动力发展的一个重要方向就是交流转动技术，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。牵引变流器的主参数选择的计算方法和结果包括功率器件的选型计算，中间直流环节支撑电容计算，变压器变比漏感计算，制动电阻计算。交—直—交型动车组系统的原理是把接触网获得的单相交流高电压经变压器降压，然后再经过整流器变为平稳的直流电压，最后将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。
最后，本文利用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。
毕业论文关键词： 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: High-speed trains as an important developing direction of railway transportation in our country, and the progress of the society in the development of a country is of great significance. High speed emu is the world's high and new technology integration, is iconic high-speed railway equipment. Through technology introduction and digestion and absorption in our country, greatly promote the localization of high-speed trains and the pace of innovation.
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.
Finally, this paper use of MATLAB/SIMULINK software platform, set up the simulation model of three level inverter system. Single-phase bridge type all control of rectifier circuit, three-phase bridge type all control rectifier circuit, three-phase voltage type SPWM inverter and three level converters has carried on the simulation research, such as and the simulation results are obtained
Key words: EMU; three-level; converter; mathematic model; simulation
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 2
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
1.3 本文研究的主要内容 3