牵引变流器优化控制仿真研究.pdf

第32卷第02期
计算机仿真
2015年02月
文章编号:1006-9348(2015)02-0188-06
牵引变流器优化控制仿真研究
谭喜堂,成林坤,朱琴跃,张红梅
(同济大学电子与信息工程学院,上海201804)
摘要:在电力机车牵引变流器优化控制的研究中,动车组牵引变流器是动车组完成电能转换和传递的关键部件,性能好坏直
接关系到动车组能否安全可靠运行。针对CRH2A型牵引变流器输出电压变化率大、谐波含量高等问题,对多电平技术在
牽引变流器中的应用进行了研究。首先分析了二极管箝位型五电平变流器( DCMILC)和模块化五电平变流器(MLC)的工
作原理及控制策略,分别构建了牵引变流器的优化模型;并根据CRH2A型牵引变流器主电路实际设计参数应用 Matlab仿
真软件对五电平 DCMILC和M2LC分别进行了建模和仿真,比较和分析了牵引变流器中不同逆变器电路拓扑结构及其对应
的控制策略对系统输人输出性能的影响。仿真结果初步验证了两种优化模型对CRH2A型牵引变流器性能的改善效果。
关键词:牵引变流器;多电平技术;正弦脉宽调制;载波移相脉宽调制;电压均衡控制;输入输出性能分析
中图分类号:TM46文献标识码:B
Research on Simulation of Optimization
Control of Traction Converter
TAN Xi-tang, CHENG Lin-kun, ZHU Qin-yue, ZHANG Hong-mei
(School of Electronics and Information Engineering, Tongji University, Shanghai 201804, China)
ABSTRACT: A traction converter is a critical component to implement electrical energy conversion and transmission
for EMU. Its performance is directly related to the EMU'S operation safety and reliability. Considering the large
out
put voltage change rate and the high harmonic content, research on multilevel technology applied to traction converter
was conducted. Firstly, the working principle and control strategy of the diode clamped five-level converter(DCM
LC )and modular five-level converter(ML)were analyzed. The optimization models of traction converter were
built based on the above topologies. Based on the actual design parameters of the traction converters main circuits of
CRH2 A, the modeling and simulation of the five-level DCMLC and MLC were separately conducted on Matlab
plat orm. Comparison and analysis of the effects on systems input/output performance imposed by different traction
inverter circuits structures and the corresponding control methods were conducted. The simulation results preliminary
verify the effect of the improvements of the two optimization models
KEYWORDS: Traction converter; Multi-level technology; SPWM; Carrier phase-shifted pulse width modulation
Voltage balancing control; Input and output performance analysis
MLC)和二极管箝位型( Diode Clamped Multi- Level Convert-
1引言
er, DCMLC)三种い-】。CHMC在应用时往往需要很多独立
随着电力电子技术的发展,多电平变流器因其具有开关直流电源,系统成本高且不易实现四象限运行。 FCMILC需
损耗低、输出电压正弦度高、谐波含量低等优点而日益受到要大量箝位电解电容,导致系统体积大、可靠性差,实际场合
关注。目前,多电平变流器根据其电路结枃的不同主要分为中较少应用“り。DCMC尤其是三电平结构因其输出波形谐
H桥级联型( Cascade H- bridge Multi- Level Converter,CrHM波畸变率小、系统EM低等优点?而受到广泛关注;但对
LC)、电容箝位型( Flying Capacitor Multi- evel Converter,PC:于三、五电平以上的DCMC而言,因其存在器件数量多、直
流侧电压不平衡和控制策略复杂等问题而较少得到应用。
基金项目:高校企业业务基金项目(20112038)
近年来兴起的一种新型拓扑结构-模块化多电平变流器门
收稿日期:2014-05-08修回日期:2014-06-11
( Modular Multi- Level Converter,MPLC),由于它秉承了传统
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万方数据