基于三电平PWM整流器的地铁牵引供电系统  

Traction Power Supply for Subway Based on Three-level PWM Rectifier

作　　者：黄华[1] 

机构地区：[1]东南大学,江苏南京210096

出　　处：《电力电子技术》2009年第12期4-6,共3页Power Electronics

摘　　要：三电平PWM整流器因具有功率因数高、谐波含量低、电压稳定性好,能量双向流动等优点而广泛应用于各种高压大功率场合。基于三电平PWM整流器的地铁牵引供电系统采用双三绕组变压器和4个三电平PWM整流器并联的拓扑结构,有利于系统模块化设计和冗余设计。重点介绍了并联三电平PWM整流器的控制策略和一种简化的三电平SVPWM及中性点平衡控制算法,最后通过Matlab/Simulink仿真证明了所述控制策略的正确性。Three-level PWM rectifier can be extensively applied in various high voltage and high power situation with its advantages such as high power factor,low harmonic content,better voltage stability and bidirectional power flow.Traction power supply for subway based on three-level PWM rectifier adopts the topology of double three-winding transformer and four parallel three-level PWM rectifier,which is beneficial to modular design and redundant design.This paper focus on introducing the control strategy of parallel three-level PWM rectifier and a simplified three-level SVPWM algorithm with neutral point balancing method.Simulative results verify the validity of improved control algorithm.

关 键 词：整流器 牵引供电系统 脉宽调制 中性点平衡 

分 类 号：TM461[电气工程—电器]