一种适用于25kv电气化铁路的多电平混合补偿系统

P. Tan, P. Loh, D. G. Holmes
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引用次数: 42

摘要

在许多采用单相25kv工频供电的电气化铁路系统中,当传统的scr机车运行时,电能质量会特别差,这限制了可以输送给机车的功率量。本文提出了一种由级联或简化拓扑的多电平有源电力滤波器和低额定阻尼滤波器组成的并联补偿系统。有源滤波器采用一种新颖的滞后电流调节策略控制,既能减轻馈线沿线的低阶电压谐波畸变,又能提供均方根电压支持。无源滤波器阻尼谐波共振,这是典型的25千伏牵引系统。结果表明,过滤系统可以显著提高牵引系统的电力传输能力,而只需要相对较小的资本投资,允许旧的晶闸管机车和增加的交通量,而不必完全升级系统。仿真和实验结果显示了该滤波器在稳态和瞬态条件下的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A robust multilevel hybrid compensation system for 25 kV electrified railway applications
On many electrified railway systems with single-phase 25 kV industrial frequency supply, the power quality can be particularly poor when conventional SCR-based locomotives are operating, and this constrains the amount of power that can be delivered to the locomotives. This paper presents a shunt compensation system consisting of alternatively a cascaded or a reduced topology multilevel active power filter, and a low rating damping filter. The active filter is controlled by a novel hysteresis current regulation strategy, and both mitigate low order voltage harmonic distortion along the feeder and provides RMS voltage support. The passive filter damps harmonic resonances that are typical in such 25 kV traction systems. The results show that the filter system can significantly increase traction system power transfer capacity with only a relatively small capital investment, allowing older thyristor based locomotives and increased traffic levels to be supported without necessarily requiring a complete system upgrade. Simulation and experimental results are included showing the performance of the filter for both steady state and transient conditions.
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