【摘要】 提出了一种采用斯科特变压器和平衡变换装置的铁道牵引供电系统同相供电方案.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.无论负载实际的特性如何,经过变换之后在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,仿真结果证实了该系统的正确性.更多还原

【Abstract】 This paper presents a novel cophase power supply system for electrified railway traction, in which a Scott transformer and a balance convert device (BCD) based on active power filter is employed to improve the supply quality deterioration caused by the single_phase locomotives. Being consisted of two singlephase 4_quadrant converters, the BCD can fully compensate the load’s reactive and harmonic current, and the unbalancing current between the transformer two coils. As 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, and a new optimal state control method are proposed. Software simulation result of the system with a full load locomotive is presented to verify the system feasibility.更多还原