线路交叉条件下直流牵引供电系统杂散电流特性*

doi:10.11985/2023.03.013

电气工程学报 ›› 2023, Vol. 18 ›› Issue (3): 117-125.doi: 10.11985/2023.03.013

• 特邀专栏：电气化交通中的高压绝缘与防护新技术 • 上一篇下一篇

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线路交叉条件下直流牵引供电系统杂散电流特性^*

张岩¹(), 孙继星²(), 刘继永¹^,², 关卓然³, 雷栋⁴, 郭旭刚⁴, 刘洋¹, 王鑫⁴

1.国能朔黄铁路发展有限公司北京 100080
2.北京交通大学电气工程学院北京 100044
3.国网天津市电力公司东丽供电分公司天津 300300
4.中国铁道科学研究院集团有限公司北京 100000

收稿日期:2023-03-14 修回日期:2023-05-20 出版日期:2023-09-25 发布日期:2023-10-23
通讯作者: 孙继星，男，1984年生，博士，副教授。主要研究方向为牵引供电系统高压绝缘与接地技术。E-mail：sanyou345@163.com
作者简介:张岩，男，1986年生，硕士，工程师。主要研究方向为牵引供电系统接地技术。E-mail：11095021@ceic.com
基金资助:
* 中国铁道科学研究院集团有限公司科研(2022YJ152);国能朔黄铁路发展有限公司科技开发(SH-08-22)

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

ZHANG Yan¹(), SUN Jixing²(), LIU Jiyong¹^,², GUAN Zhuoran³, LEI Dong⁴, GUO Xugang⁴, LIU Yang¹, WANG Xin⁴

1. National Energy Group Shuohuang Development Co., Ltd., Beijing 100080
2. School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044
3. Dongli Power Supply Company, State Grid Tianjin Electric Power Company, Tianjin 300300
4. China Academy of Railway Sciences Co., Ltd., Beijing 100000

Received:2023-03-14 Revised:2023-05-20 Online:2023-09-25 Published:2023-10-23

摘要/Abstract

摘要：

针对地铁多线路交叉条件下直流牵引供电系统杂散电流材料异常腐蚀问题开展研究。首先，建立了隧道条件下单线路杂散电流模型，研究了列车供电方式、运行方式、土壤电阻率、绝缘设计对杂散电流的影响。研究结果表明，单边供电条件下供电区间内产生的杂散电流明显高于双边供电；列车加速及再生制动时会产生较大的杂散电流；杂散电流的大小随运行区段土壤电阻率的升高、轨地过渡电阻的增加而减小。其次，建立了隧道条件下交叉线路杂散单流模型，研究了交叉线路隧道中间土壤的电势分布及电场分布。研究结果表明，隧道间的土壤中电势及电场过大，需要对其中的金属管线采取相应措施防范杂散电流腐蚀。结合当前新型混凝土特性，研究了掺杂粉煤灰等掺合料混凝土道床对杂散电流的影响。研究结果表明，直流牵引供电系统杂散电流随掺杂混凝土导电率的减小而减小，研究为地铁直流牵引供电系统杂散电流抑制方法提供依据。

关键词: 牵引供电, 地铁, 交叉线路, 杂散电流, 电腐蚀, 混凝土

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

中图分类号:

TM561

张岩, 孙继星, 刘继永, 关卓然, 雷栋, 郭旭刚, 刘洋, 王鑫. 线路交叉条件下直流牵引供电系统杂散电流特性^*[J]. 电气工程学报, 2023, 18(3): 117-125.

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.

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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

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

轨地过渡电阻/(Ω·km)	杂散电流总量/A
15	0.161 6
10	0.238 0
5	0.455 6
3	0.717 6

线路交叉条件下直流牵引供电系统杂散电流特性^*

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

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图/表 21

参考文献 27

相关文章 15

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符号	含义
P	PVA可再分散乳胶在胶凝材料的掺量
F	占胶凝材料30%的矿物掺量中粉煤灰的占比
K	占胶凝材料30%的矿物掺量中矿粉的占比
Y	页岩陶砂取代河砂的体积率

P(%)	F(%)	K(%)	Y(%)	电阻率/ (Ω·m)	杂散电流总量/A
1	50	50	10	752.7	0.163 2
1.5	50	50	30	856.8	0.162 8
1.5	70	30	10	897	0.162 4
0.5	70	30	30	937.2	0.162 0

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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

交叉线路	杂散电流总量/A
上层隧道	0.161 6
下层隧道	0.161 6