Stray Current Characteristics of DC Traction Power Supply System when Several Routes Cross

doi:10.11985/2023.03.013

Abstract

Abstract:

The abnormal corrosion of stray current materials in DC traction power supply system under the condition of metro multi line crossing is studied. Firstly, the stray current model of single line under tunnel condition is established, and the influence of train power supply mode, operation mode, soil resistivity and insulation design on stray current is studied. The results show that the stray current generated in the power supply section under the condition of single side feeding is significantly higher than that under the condition of two sides feeding. Larger stray current will be generated when the train accelerates and regenerative braking. The magnitude of stray current decreases with the increase of soil resistivity and rail ground transition resistance in the operation section. Secondly, the stray single flow model of cross line under tunnel condition is established to study the potential distribution and electric field distribution of soil in the middle of cross line tunnel. The results show that the electric potential and electric field in the soil between tunnels are too large, and corresponding measures should be taken to prevent stray current corrosion of metal pipelines. Combined with the characteristics of new concrete, the influence of concrete ballast with fly ash and other admixtures on stray current is studied. The results show that the stray current of the DC traction power supply system decreases with the decrease of the conductivity of the doped concrete, which provides the basis for the stray current suppression method of the DC traction power supply system of metro.

Key words: Traction power supply, metro, cross line, stray current, electric corrosion, concrete

CLC Number:

TM561

ZHANG Yan, SUN Jixing, LIU Jiyong, GUAN Zhuoran, LEI Dong, GUO Xugang, LIU Yang, WANG Xin. Stray Current Characteristics of DC Traction Power Supply System when Several Routes Cross[J]. Journal of Electrical Engineering, 2023, 18(3): 117-125.

Figures/Tables 21

References 27

[1]	李威. 地铁杂散电流腐蚀监测及防护技术[M]. 北京: 中国矿业大学出版社, 2004.
	LI Wei. Stray current corrosion monitoring and protection technology of subway[M]. Beijing: China University of Mining and Technology Press, 2004.
[2]	刘燕, 王京梅, 赵丽, 等. 地铁杂散电流分布的数学模型[J]. 工程数学学报, 2009, 26(4):571-576.
	LIU Yan, WANG Jingmei, ZHAO Li, et al. Mathematical model of distribution of metro stray current[J]. Chinese Journal of Engineering Mathematics, 2009, 26(4):571-576.
[3]	赵宇辉, 周晓军. 地铁杂散电流分布的数值分析[J]. 城市轨道交通研究, 2009, 12(12):42-47.
	ZHAO Yuhui, ZHOU Xiaojun. Numerical analysis of stray current distribution in subway[J]. Urban Mass Transit, 2009, 12(12):42-47.
[4]	牟龙华, 史万周, 张明锐. 排流网情况下地铁迷流分布规律的研究[J]. 铁道学报, 2007(3):45-49.
	MOU Longhua, SHI Wanzhou, ZHANG Mingrui. Study on the distribution law of subway fanning flow in the case of drainage network[J]. Journal of the China Railway Society, 2007(3):45-49.
[5]	赵凌. 直流牵引供电系统杂散电流分布的研究[D]. 成都: 西南交通大学, 2011.
	ZHAO Ling. Research on stray current distribution of DC traction power supply system[D]. Chengdu: Southwest Jiaotong University, 2011.
[6]	汪佳. 多列车运行下地铁杂散电流分布研究[D]. 成都: 西南交通大学, 2012.
	WANG Jia. Study on stray current distribution in subway under multi-train operation[D]. Chengdu: Southwest Jiaotong University, 2012.
[7]	李健华. 地铁杂散电流动态概率分布及其腐蚀防护的研究[D]. 成都: 西南交通大学, 2016.
	LI Jianhua. Research on dynamic probability distribution of stray current and its corrosion protection in subway[D]. Chengdu: Southwest Jiaotong University, 2016.
[8]	SZYMENDERSKI J, MACHCZYński W, BUDNIK K. Modeling effects of stochastic stray currents from D.C. traction on corrosion hazard of buried pipelines[J]. Energies, 2019, 12(23):4570. doi: 10.3390/en12234570
[9]	庞原冰, 李群湛. 地铁杂散电流模型讨论[J]. 重庆工学院学报, 2007(11):110-113.
	PANG Yuanbing, LI Qunzhan. Discussion on the modeling of stray current in subway[J]. Journal of Chongqing Institute of Technology, 2007(11):110-113.
[10]	庞原冰, 李群湛, 刘炜, 等. 基于电场的地铁杂散电流模型研究[J]. 城市轨道交通研究, 2008(2):27-31.
	PANG Yuanbing, LI Qunzhan, LIU Wei, et al. Modeling of stray currents in subway based on electric field[J]. Urban Mass Transit, 2008(2):27-31.
[11]	胡云进, 钟振, 方镜平. 地铁杂散电流场的有限元模拟[J]. 中国铁道科学, 2011, 32(6):129-133.
	HU Yunjin, ZHONG Zhen, FANG Jingping. Finite element simulation of stray current field in subway[J]. China Railway Science, 2011, 32(6):129-133.
[12]	裴潇湘. 地铁杂散电流场三维有限元仿真与防护研究[D]. 兰州: 兰州交通大学, 2015.
	PEI Xiaoxiang. Research on three-dimensional finite element simulation and protection of stray current field in subway[D]. Lanzhou: Lanzhou Jiaotong University, 2015.
[13]	CAI Z, ZHANG X, CHENG H. Evaluation of DC-subway stray current corrosion with integrated multi-physical modeling and electrochemical analysis[J]. IEEE Access, 2019, 7:168404-168411. doi: 10.1109/Access.6287639
[14]	COTTON I, CHARALAMBOUS C, AYLOTT P, et al. Stray current control in DC mass transit systems[J]. IEEE Transactions on Vehicular Technology, 2005, 54(2):722-730. doi: 10.1109/TVT.2004.842462
[15]	CHARALAMBOUS C A, COTTON I, AYLOTT P. A simulation tool to predict the impact of soil topologies on coupling between a light rail system and buried third-party infrastructure[J]. IEEE Transactions on Vehicular Technology, 2008, 57(3):1404-1416. doi: 10.1109/TVT.2007.909312
[16]	CHARALAMBOUS C A, COTTON I, AYLOTT P, et al. A holistic stray current assessment of bored tunnel sections of DC transit systems[J]. IEEE Transactions on Power Delivery, 2013, 28(2):1048-1056. doi: 10.1109/TPWRD.2012.2227835
[17]	CHARALAMBOUS C A, AYLOTT P. Dynamic stray current evaluations on cut-and-cover sections of DC metro systems[J]. IEEE Transactions on Vehicular Technology, 2014, 63(8):3530-3538. doi: 10.1109/TVT.2014.2304522
[18]	于凯. 基于CDEGS的地铁杂散电流仿真研究[D]. 成都: 西南交通大学, 2015.
	YU Kai. Simulation study of metro stray current based on CDEGS[D]. Chengdu: Southwest Jiaotong University, 2015.
[19]	李嘉成. 城市轨道交通杂散电流分布特性及仿真研究[D]. 成都: 西南交通大学, 2017.
	LI Jiacheng. Characterization and simulation study of stray current distribution in urban rail transit[D]. Chengdu: Southwest Jiaotong University, 2017.
[20]	林炎华. 地铁牵引供电回路动态杂散电流研究[D]. 北京: 北京交通大学, 2019.
	LIN Yanhua. Research on dynamic stray current of metro traction power supply circuit[D]. Beijing: Beijing Jiaotong University, 2019.
[21]	LIN Y, LI K, SU M, et al. Research on stray current distribution of metro based on numerical simulation[C]// 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC), May 14-18,2018,Suntec City,Singapore. IEEE, 2018:36-40.
[22]	李威. 地铁杂散电流的监测与防治[J]. 城市轨道交通研究, 2003(4):48-52.
	LI Wei. Monitoring and prevention of stray currents in subways[J]. Urban Mass Transit, 2003(4):48-52.
[23]	李威, 王禹桥, 王爱兵. 地铁杂散电流监测系统的研制[J]. 电气化铁道, 2004(5):40-42.
	LI Wei, WANG Yuqiao, WANG Aibing. Development of stray current monitoring system for subway[J]. Electric Railway, 2004(5):40-42.
[24]	易友样, 李凤沼, 王干一, 等. 一种积极有效的地铁杂散电流防护方案[J]. 天津理工学院学报, 1995(2):1-5.
	YI Youxiang, LI Fengzhao, WANG Ganyi, et al. An active and efficient scheme protecting from underground stray current[J]. Journal of Tianjin University of Technology, 1995(2):1-5.
[25]	WANG M, YANG X, ZHENG T Q, et al. DC autotransformer-based traction power supply for urban transit rail potential and stray current mitigation[J]. IEEE Transactions on Transportation Electrification, 2020, 6(2):762-773. doi: 10.1109/TTE.6687316
[26]	王璐璐. 基于DCAT牵引供电系统的地铁杂散电流治理技术[D]. 北京: 北京交通大学, 2019.
	WANG Lulu. Stray current management technology for subway based on DCAT traction power supply system[D]. Beijing: Beijing Jiaotong University, 2019.
[27]	GU J, YANG X, ZHENG T Q, et al. Negative resistance converter traction power system for reducing rail potential and stray current in the urban rail transit[J]. IEEE Transactions on Transportation Electrification, 2021, 7(1):225-239. doi: 10.1109/TTE.6687316

名称	参数	数值
钢轨	纵向电阻/(Ω/km)	0.04
钢轨	等效半径/m	0.049 65
排流网	纵向电阻/(Ω/km)	0.6
排流网	等效半径/m	0.008
结构钢筋	纵向电阻/(Ω/km)	0.3
结构钢筋	等效半径/m	0.01
钢轨外覆绝缘层	电阻率/(Ω·m)	512 821
钢轨外覆绝缘层	厚度/m	0.01
隧道结构	空气电阻率/(Ω·m)	10¹⁸
	混凝土电阻率/(Ω·m)	1 000
	土壤电阻率/(Ω·m)	100

供电方式	杂散电流总量/A
双边供电	0.161 6
单边供电	0.362 0

运行方式	杂散电流总量/A
牵引加速	0.155 6
再生制动	0.155 6

土壤电阻率/(Ω·m)	混凝土电阻率/(Ω·m)	杂散电流总量/A
50	500	0.164 0
100	800	0.162 4
150	1 100	0.160 0
200	1 500	0.158 4

轨地过渡电阻/(Ω·km)	等效绝缘层电阻率/(Ω·m)
15	512 821
10	342 466
5	171 233
3	102 775