电气化铁路列车柔性不断电过分相系统及其控制策略

doi:10.19595/j.cnki.1000-6753.tces.210874

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摘要针对现有电气化铁路柔性过分相技术存在的变流设备容量需求大、弓网带电流分断引起燃弧等问题,提出一种列车柔性不断电过分相系统及其控制策略。该系统通过背靠背变流器连接电分相两侧的供电臂,单相逆变器从背靠背变流器的直流侧引出并串接移相变压器后连接至中性线,该结构可有效降低逆变器等变流设备的容量,以实现列车过分相全过程不断电、无过电压与不拉弧。首先,详细分析所提系统的工作原理;随后,提出相应的电压柔性切换、功率主动调整的控制策略;然后,通过Simulink仿真和RT-Lab硬件在环实验,验证了该系统与控制策略的有效性;最后,结合电气化铁路的实际情况,分析所提方案在不同应用场景下的变流设备容量需求,并给出了应用建议。

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	黄毅
	胡海涛
	王翼云
	葛银波
	谷禹涵

关键词 ：电气化铁路, 电分相, 柔性过分相, 功率调整, 移相变压器

Abstract：Existing flexible phase-separation passing technologies for electrified railways face problems including large capacity requirements for converters and arcing caused by the separation with current between pantograph and contact wire. Thus, this paper proposed a more practical flexible uninterrupted phase-separation passing system and its control strategy. The proposed system connects the power phases on both sides of the phase-separation through a back-to-back converter. The single-phase inverter is drawn from the DC link of the back-to-back converter and connected with a phase-shifting transformer in series to maintain the voltage on the neutral wire. The connected phase-shifting transformer can effectively reduce the capacity of converters. With the goal of passing the phase-separation without power interruption, overvoltage and arcing, the working principle of the proposed system is analyzed in detail, and a control strategy with flexible voltage transition and power adjustment ability is proposed. Next, the effectiveness of the proposed system and control strategy is verified by the Matlab/Simulink-based simulation and the RT-Lab-based hardware in the loop experiment. Finally, the required capacity of the converters in the proposed system is analyzed, according to the practical operation scenarios of electric railways. Based on the analyzed results, some application suggestions of the proposed system are advised.

Key words： Electrified railway phase-separation uninterrupted phase-separation passing power adjustment phase-shifting transformer

收稿日期: 2021-06-15

PACS:

TM922.3

基金资助:国家自然科学基金（52077179）、四川省杰出青年科技基金（2021JDJQ0032）和中国国家铁路集团有限公司科技研究开发计划（N2020G021）资助项目

通讯作者: 胡海涛男,1987年生,教授,博士生导师,研究方向为牵引供电系统稳定性与供电品质。E-mail: hht@swjtu.edu.cn

作者简介: 黄毅男,1997年生,博士研究生,研究方向为电气化铁路“源网车储”一体化供电。E-mail: huangyizero@foxmail.com

引用本文:

黄毅, 胡海涛, 王翼云, 葛银波, 谷禹涵. 电气化铁路列车柔性不断电过分相系统及其控制策略[J]. 电工技术学报, 2021, 36(23): 4959-4969. Huang Yi, Hu Haitao, Wang Yiyun, Ge Yinbo, Gu Yuhan. Flexible Uninterrupted Phase-Separation Passing System and Its Control Strategy for Electrified Railway Trains. Transactions of China Electrotechnical Society, 2021, 36(23): 4959-4969.

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