基于半桥结构的新型高速铁路功率调节器  

A Novel Power Conditioner Based on Half-Bridge Converter for High-speed Electrified Railway System

作　　者：马伏军[1] 罗安[1] 吴传平[1] 孙娟[1] 王刚[1] 兰征[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《中国电机工程学报》2011年第12期1-8,共8页Proceedings of the CSEE

基　　金："十一五"国家科技支撑计划重大项目(2009BAG12A09)~~

摘　　要：随着电气化铁路朝着高速、大功率负荷发展,电力牵引系统的电能质量问题变得越来越至关重要。提出一种适合于大功率补偿的基于半桥变流器结构的新颖铁路功率调节装置。该补偿系统中,由2个背靠背的半桥变流器通过中间2个串联电容连接在一起,然后通过降压变压器分别与2个牵引供电臂连成一体。相对于传统功率调节器,该功率调节单元只需要2个开关桥臂和1组串联电容,减少了1对开关桥臂即4个功率开关管。在完成同样功能前提下,将功率开关减少了一半,减小了硬件成本,提高了补偿装置的可靠性能。这样将大大有利于装置的大功率模块化,与当今高速铁路大容量的功率补偿相对应,具有很好的发展前景。仿真和实验结果验证了所提补偿结构及其方法的有效性。With the high-speed,high-power load development of high-speed electrified railway,power quality of the electric traction system become more and more critical.This paper proposed a novel solution based on half-bridge converter railway power conditioner likely applied to high-power compensation.The compensation system consisted of two half-bridge converters connected by two joint capacitors in series,and then it was linked with two traction power arms through step-down transformers.Compared with traditional power regulator,the power compensating unit required only two pairs of power switches and two capacitors,so it reducd four power switches.Accomplish the same function in the premise,it reduced half of active capacity,hardware cost and complexity,and increased the reliability of compensation device.This would greatly be of benefit to form the modular high-power devices,and was corresponding to large-capacity compensation of high-speed railway with good prospects.Simulation and experimental results had effectively verified the proposed structure and its control method.

关 键 词：半桥逆变器 电气化铁路 电能质量 负序补偿 拓扑结构 均压控制 

分 类 号：TM76[电气工程—电力系统及自动化]