Design and Optimization of Freight Railway Energy Storage Traction System for Time-Sharing Cross-Regional Peak Shaving and Valley Filling

doi:10.16183/j.cnki.jsjtu.2024.016

Abstract

Abstract:

To address the difficulties in adjusting new energy resources along electrified railways, uneven load distribution, and waste of potential energy in loading and unloading operations after trains arrive at stations, a design optimization strategy is proposed for the energy storage traction system of cross-regional freight railways. A time-sharing zoning electricity price model and an energy storage traction system capacity optimization allocation model are developed to guide load time shifting to achieve peak shaving and valley filling in different time domains and geographical spans by analyzing the spatiotemporal characteristics of mobile energy storage charging and discharging. Then, an energy management strategy is proposed aiming at maximizing the daily operating efficiency. The calculation example verifies that the designed energy storage traction system and its operation strategy can effectively improve the economic benefits during the operation cycle of the train, promote energy consumption along the line, and have important reference value for the low-carbon operation of electrified railways.

Key words: electrified railway, mobile energy storage system (MESS), peak shaving and valley filling, capacity configuration, time and zonal price

CLC Number:

TM734

YANG Huanhong, YANG Zhenyu, HUANG Wentao, CHAI Lei, WANG Yuxuan, YE Jingyuan. Design and Optimization of Freight Railway Energy Storage Traction System for Time-Sharing Cross-Regional Peak Shaving and Valley Filling[J]. Journal of Shanghai Jiao Tong University, 2025, 59(12): 1784-1794.

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类别	取值
储能电池单位价格/[元·(kW·h)^-1]	1100
变流器单位价格/(元·kW^-1)	400
电网谷时购电电价/[元·(kW·h)^-1]	0.41
电网平时购电电价/[元·(kW·h)^-1]	0.76
电网峰时购电电价/[元·(kW·h)^-1]	1.14
燃气轮机启动成本/(元·次^-1)	1.6
燃气轮机运维系数	0.02
充放电效率	0.9
储能系统生命周期/a	10
货运班列初始载重/t	5000
货运班列技术速度/(km·h^-1)	100
吊具下负载(额定起重量)/kN	396.9
吊具下负载(过载起重量)/kN	502.3
吊具及上架自重/kN	103.9
集装箱装载质量总计最大值/kg	61850
满载起升速度(负载40.5 t)/(m·s^-1)	0.4
空载起升速度/(m·s^-1)	0.883
起升高度(全行程)/m	18.2
上升或下降加速时间/s	2
上升或下降减速时间/s	2

方案	典型日总成本/万元	典型日配置成本/万元	班列运行成本/万元	起重机群运行成本/万元
1	13.8913		3.6271	0.4500
2	10.4029	1.1370	1.7105	0.4500
3	10.1667	1.1078	1.6326	0.3806
4	10.2357	1.1078	1.5804	0.3806

方案	峰值/kW	谷值/kW	峰谷差值/kW	火电机组出力/kW
1	11181.2	3234.4	7946.8	13343.9
3	10216.1	4318.4	5897.7	9928.6