基于有源滤波器和阻抗匹配平衡变压器的同相牵引供电系统  

Cophase traction supply system based on active power filter and impedance-matching balance transformer

作　　者：曾国宏[1] 郝荣泰[1] 

机构地区：[1]北方交通大学电气工程学院,北京100044

出　　处：《铁道学报》2003年第3期49-54,共6页Journal of the China Railway Society

基　　金：国家自然科学基金项目(59677020)

摘　　要：提出了由一种阻抗匹配平衡变压器和平衡变换装置(BCD)构成的铁道牵引系统同相供电方案。平衡变换装置由两个电压型单相有源滤波器构成,用以补偿负载的无功和谐波电流,以及变压器两副边绕组的不平衡电流。无论牵引负载的性质及负荷的分布情况如何,经过变换之后,变压器的输入侧都表现为三相对称的纯阻性负载。文中分析了系统的结构和工作过程,提出了单相有源滤波器的状态优化控制方法。以一列满载运行的机车为对象,进行了供电系统的软件仿真研究,仿真结果证实了系统结构和控制方法的正确性。This paper presents a novel cophased power supply system for electrified railway traction, in which the impedancematching balance transformer(IMBT) and an active power filter based balance converting device (BCD) are employed to improve the supply quality deteriorating caused by the singlephase locomotives. Consisted of two singlephase 4quadrant converter, the BCD can fully compensate the load's reactive and harmonic current, and the unbalancing current between the transformer's coils. Viewed from the input side of the transformer, the singlephase inductive load acts as a symmetrical pure resistant load. The topology and principle of the system are analyzed, and a new optimal state control method is proposed. Software simulation result of the system with a full load locomotive is presented to verify the system's feasibility.

关 键 词：牵引供电系统 有源滤波器 平衡变换 同相供电 阻抗匹配平衡变压器 

分 类 号：U223.6[交通运输工程—道路与铁道工程] TM761[电气工程—电力系统及自动化]