• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology

Article

Energy — Efficient Operation in Subway Systems: Tracking Optimal Speed Profile with on Board Supercapacitor Energy Storage System
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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v14i23.602

Year: 2021, Volume: 14, Issue: 23, Pages: 1914-1928

Original Article

Energy — Efficient Operation in Subway Systems: Tracking Optimal Speed Profile with on Board Supercapacitor Energy Storage System

An Thi Hoai Thu Anh 1, Nguyen Van Quyen 2,*

1 Department of Electrical Engineering, University of Transport and Communications, Hanoi, 112100, Vietnam
2 Department of Applied Mechanics, Hanoi University of Science and Technology, Hanoi, 112100, Vietnam

*Corresponding author email: [email protected]

Received Date:18 April 2021, Accepted Date:27 May 2021, Published Date:02 July 2021

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Objectives: To verify the energy efficiency operation of electrified trains on the certain metro line, in Vietnam by combining two solutions to recover regenerative braking energy with on-board supercapacitors and tracking the optimal speed profile. Methods: This study proposes an integrated optimization method: applying Pontryagin's maximum principle (PMP) finds the optimal speed profile with fixed running time and recuperating regenerative braking energy by designing the control method — Current Mode Control (CMC) to manage charge/discharge process of the on-board supercapacitor energy storage system (SCESS) tracking the optimal speed profile. Findings: With this approach, a considerable reduction in consuming energy obtained for Cat Linh-Ha Dong metro line, Vietnam has been verified by simulation results on MATLAB and MAPLE software indicating that applying PMP, the highest operation energy saving is 10.15%, but if both solutions PMP and SCESS are applied, the energy saving level increases up to 14.7% in comparison with simulation results of the case of original speed profile. Novelty: Combining two energy saving solutions simultaneously: applying PMP to determine the optimal speed profile and using super-capacitors with CMC algorithm have recuperated the regenerative braking energy. The level of energy saving is higher than other saving solutions.

Keywords

Pontryagin's Maximum Principle, Supercapacitor Energy Storage System, Current Mode Control, Energy­Efficiency Operation, Timetable Optimization

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Copyright

© 2021 Anh & Quyen. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)

  • 02 July 2021

Year: 2021, Volume: 14, Issue: 23

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