The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill Sections
With the energy consumption rising in rail transport, the railway sector is showing increasing interest in the energy-efficient operation of freight trains. Freight trains require more complicated driving strategies than ordinary passenger trains do due to their heavy loads, especially in the long-d...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-06-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/10/6/794 |
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| author | Xuan Lin Qingyuan Wang Pengling Wang Pengfei Sun Xiaoyun Feng |
| author_facet | Xuan Lin Qingyuan Wang Pengling Wang Pengfei Sun Xiaoyun Feng |
| author_sort | Xuan Lin |
| collection | DOAJ |
| description | With the energy consumption rising in rail transport, the railway sector is showing increasing interest in the energy-efficient operation of freight trains. Freight trains require more complicated driving strategies than ordinary passenger trains do due to their heavy loads, especially in the long-distance steep downhill (LDSD) sections that are very common in freight rail lines in China. This paper studies the energy-efficient operation of a freight train considering LDSD sections. An optimal control model including regenerative and pneumatic braking is developed for the freight train. Then, when a train leaves/enters the LDSD section, we verify the uniqueness of control transitions and discuss the speed profile linkage between LDSD and its adjacent sections, which indicates that the periodic braking should be applied on LDSD sections for optimality. Additionally, given the same running time for the entire journey, our analysis shows that electrical braking-full braking strategy is more energy-efficient than coasting-full braking strategy on LDSD sections. Finally, a numerical algorithm for the optimal driving solution is proposed. The simulation results demonstrate that the driving strategies generated by the proposed algorithm performs better than those from fuzzy predictive control and field operation regarding energy saving. |
| first_indexed | 2024-04-14T06:40:10Z |
| format | Article |
| id | doaj.art-59d64c1b5fe04e7badd3fa856330156f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T06:40:10Z |
| publishDate | 2017-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-59d64c1b5fe04e7badd3fa856330156f2022-12-22T02:07:22ZengMDPI AGEnergies1996-10732017-06-0110679410.3390/en10060794en10060794The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill SectionsXuan Lin0Qingyuan Wang1Pengling Wang2Pengfei Sun3Xiaoyun Feng4School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaSchool of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaDepartment of Transport and Planning, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The NetherlandsSchool of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaSchool of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, ChinaWith the energy consumption rising in rail transport, the railway sector is showing increasing interest in the energy-efficient operation of freight trains. Freight trains require more complicated driving strategies than ordinary passenger trains do due to their heavy loads, especially in the long-distance steep downhill (LDSD) sections that are very common in freight rail lines in China. This paper studies the energy-efficient operation of a freight train considering LDSD sections. An optimal control model including regenerative and pneumatic braking is developed for the freight train. Then, when a train leaves/enters the LDSD section, we verify the uniqueness of control transitions and discuss the speed profile linkage between LDSD and its adjacent sections, which indicates that the periodic braking should be applied on LDSD sections for optimality. Additionally, given the same running time for the entire journey, our analysis shows that electrical braking-full braking strategy is more energy-efficient than coasting-full braking strategy on LDSD sections. Finally, a numerical algorithm for the optimal driving solution is proposed. The simulation results demonstrate that the driving strategies generated by the proposed algorithm performs better than those from fuzzy predictive control and field operation regarding energy saving.http://www.mdpi.com/1996-1073/10/6/794freight trainenergy-efficient operationmaximum principleperiodic brakingnumerical algorithm |
| spellingShingle | Xuan Lin Qingyuan Wang Pengling Wang Pengfei Sun Xiaoyun Feng The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill Sections Energies freight train energy-efficient operation maximum principle periodic braking numerical algorithm |
| title | The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill Sections |
| title_full | The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill Sections |
| title_fullStr | The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill Sections |
| title_full_unstemmed | The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill Sections |
| title_short | The Energy-Efficient Operation Problem of a Freight Train Considering Long-Distance Steep Downhill Sections |
| title_sort | energy efficient operation problem of a freight train considering long distance steep downhill sections |
| topic | freight train energy-efficient operation maximum principle periodic braking numerical algorithm |
| url | http://www.mdpi.com/1996-1073/10/6/794 |
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