A Traction Three-Phase to Single-Phase Cascade Converter Substation in an Advanced Traction Power Supply System

Energies

Xiaoqiong He²  Aiping Guo²  Xu Peng²  Yingying Zhou¹  Zhanghai Shi²  Zeliang Shu² 

[1] China Railway Shanghai Design Institute Group Co., Ltd., Shanghai 200070, China; E-Mail:;School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China; E-Mails:

关键词: substation;    advanced traction power supply system;    three-phase to single-phase converter;    three-level neutral point clamped (3L-NPC);    cascade;   

DOI  :  10.3390/en8099915

来源: mdpi

【 摘 要 】

The advanced traction power supply system (ATPSS) is a new directional development for traction power supply systems, which can totally remove the neutral sections and effectively promote power quality. However, the existing converters suffer from small substation capacity. In this paper, a new configuration based on a three-level neutral point clamped (3L-NPC) three-phase to single-phase cascade converter in a substation is proposed for ATPSS, which can be used to match the capacity of the converter for high voltage and large power applications. The control strategy of the proposed converter is analyzed in depth, and the phase disposition sinusoidal pulse width modulation (PD-SPWM) with phase shift carrier SPWM (PSC-SPWM) is employed in the inverters. Then, the inductance equalizing circuit is applied for the voltage balance on the DC-link. Besides, a LC filter circuit is designed to eliminate the double line-frequency ripple of DC voltage. Afterwards, a simulation model and an experimental prototype are developed, respectively. The simulation results show that the proposed converter in this paper can not only meet the requirements of voltage and capacity for the traction network, but also improve power quality. Finally, the experimental results verify the correctness and feasibility of the proposed control strategy.

【 授权许可】

CC BY   
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