Analysis of Rail Potential Characteristics of AC/DC Dual-system Traction Power Supply System

被引：0
|
作者：
Chen M. [1 ]
Fu H. [1 ]
Xie C. [1 ]
Liu W. [2 ]
Xu W. [2 ]
机构：
[1] School of Electrical Engineering, Southwest Jiaotong University, Chengdu
[2] China Railway Eryuan Engineering Group Co., Ltd., Chengdu
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2022年 / 57卷 / 04期
关键词：
AC/DC dual-system traction power supply system; combined rail potential; insulation join; traction return current;
D O I：
10.3969/j.issn.0258-2724.20200597
中图分类号：
学科分类号：
摘要：
In the AC/DC dual-system traction power supply system, the locomotive works in different power supply modes before and after phase breaking, which results in differences in traction return current characteristics and affects the combined rail potential distribution of different sections. A model for AC/DC dual-system traction power supply system is established by using CDEGS software, and the correctness and validity of the calculation model is verified. Given the mutual interference in traction return current between the AC and DC sections, the combined rail potential limit of the AC/DC dual-system traction power supply system is proposed, and the main factors affecting the combined rail potential distribution and its sensitivity are explored. Results show that when the rail insulation joints are not installed in the power free zone, the increase in the length of the power free zone can reduce the mutual interference in the traction return current between the AC and DC sections, leading to the reduction of the combined rail potential in the power free zone. The increase in soil resistivity can aggravate the mutual interference of traction return currents between the AC and DC sections, resulting in increase in the combined rail potential in the power free zone. The greater the rail-to-ground resistance of the DC section, the higher the combined rail potential for the DC section. The insulating joints in the power free zone between the AC and DC sections can change the reflow structure and avoid the out of limits of the combined rail potential. The first dual-system line in China is taken as an example, showing that the DC component of the combined rail potential can be reduced from 103.92 V to 60.20 V when the insulation joints are installed, which can ensure personal safety. © 2022 Authors. All rights reserved.
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页码：729 / 736
页数：7
相关论文
共 20 条
  • [1] YANG Yao, Development of suburban rail transit in foreign metropolis, Urban Mass Transit, 11, 2, pp. 17-21, (2008)
  • [2] ZHOU Haitao, Application of dual-current-collection mode on urban masstrans it vehicles, Electric Locomotives & Mass Transit Vehicles, 27, 1, pp. 46-48, (2004)
  • [3] OGUNSOLA A, MARISCOTTI A, SANDROLINI L., Estimation of stray current from a DC-electrified railway and impressed potential on a buried pipe[J], IEEE Transactions on Power Delivery, 27, 4, pp. 2238-2246, (2012)
  • [4] TZENG Y S, LEE C H., Analysis of rail potential and stray currents in a direct-current transit system, IEEE Transactions on Power Delivery, 25, 3, pp. 1516-1525, (2010)
  • [5] YAN Mingfu, LI Xiaqing, WANG Kuijuan, Research and simulation of metro rail potential and stray current distribution, Journal of Beijing Institute of PetroChemical Technology, 21, 1, pp. 37-41, (2013)
  • [6] CHEN Minwu, ZHAO Xin, DING Dapeng, Et al., Research on switching surge of rail over-voltage protection device in power supply system for urban rail transit, China Railway Science, 38, 6, pp. 94-99, (2017)
  • [7] CAO Xiaobin, HE Fangfang, Research on return current characteristics of traction return current system in station yard, Journal of the China Railway Society, 39, 12, pp. 43-49, (2017)
  • [8] ZHANG Min, HE Zhengyou, FANG Lei, Et al., Methods to reduce rail potential of high-speed railway adopting autotransformer feeding system and simulation analysis on them, Power System Technology, 35, 3, pp. 80-84, (2011)
  • [9] XIE S F., Study on methods to reducing rail potential of high-speed railway, 32nd Annual Conference on IEEE Industrial Electronics, pp. 1042-1046, (2006)
  • [10] CAI Li, WANG Jianguo, FAN Yadong, Et al., Influence of the track-to-earth resistance of subway on stray current distribution, High Voltage Engineering, 41, 11, pp. 3604-3610, (2015)
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