Energy-efficient speed profile optimization for medium-speed maglev trains

Lai, Qingying; Liu, Jun; Haghani, Ali; Meng, Lingyun; Wang, Yihui

doi:10.1016/j.tre.2020.102007

Cited by 22 publications

(30 citation statements)

References 39 publications

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“…e layout of ASAs is related to train safety, operation efficiency, and construction cost [12,13,21]. However, the universality of previous methods is limited.…”

Section: Contribution and Organizationmentioning

confidence: 99%

“…For example, there are two main target speed profiles for the Shanghai Maglev Demonstration Line, with the maximum speeds of 430 km/h and 300 km/h. For normal high-speed maglev lines, once ASAs are set up, due to the working principle of the stopping point stepping mode, the adjustable region for train speed profiles is limited [2,6,21]. As a result, the applicability of the scheme in Figure 15 to the target speed profile with the maximum speeds lower than 450 km/h (e.g., 300 km/h) needs to be further tested.…”

Section: Journal Of Advanced Transportationmentioning

confidence: 99%

“…For the middle-to-high speed maglev, Lai et al [20] took the location of ASAs as constraints and optimized the train speed profile by using dynamic programming with mutative spacing. Taking ASAs, the nonlinear resistance, and the suspension energy consumption into account, Lai et al [21] further studied the problem of reducing the energy consumption of the MSM train based on the dynamic programming and the mixed-integer linear programming. Taking the temperature and states of the on-board battery into consideration, Yang et al [22] suggested the operation strategy of the train in propulsion decentralizations to ensure that it can stop at ASAs in case of emergencies.…”

Section: Introductionmentioning

confidence: 99%

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Auxiliary Stopping Area Layout Method for High-Speed Maglev Operated Bidirectionally on Single Track

Chu

Dong

et al. 2021

Journal of Advanced Transportation

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Auxiliary stopping area (ASA) is the necessary emergency facility for train safety of the normal high-speed maglev. The study addresses the ASA layout problem of the high-speed maglev operated bidirectionally on single track. First, an optimization model of the ASA layout for unidirectional double-track lines considering train safety, operation efficiency, and construction cost is established, and two basic methods of the ASA layout are investigated based on the distance demand characteristic of ASAs. Then, the ASA layout problem of bidirectional single-track lines is analyzed, and an ASA two-way coordination layout algorithm (ASA-TWCLA) is proposed. Finally, a numerical experiment is carried out. The results suggest that under the premise of train safety and operation efficiency, compared with using the basic methods separately on the two directions, adopting the ASA-TWCLA algorithm can obtain a more economical ASA layout scheme for the same scenario.

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“…e layout of ASAs is related to train safety, operation efficiency, and construction cost [12,13,21]. However, the universality of previous methods is limited.…”

Section: Contribution and Organizationmentioning

confidence: 99%

Section: Journal Of Advanced Transportationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Auxiliary Stopping Area Layout Method for High-Speed Maglev Operated Bidirectionally on Single Track

Chu

Dong

et al. 2021

Journal of Advanced Transportation

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“…If necessary, passengers should be able to evacuate from the train safely. At the same time, in order to maximize the guarantee that the train can stop in the auxiliary stopping area at any time, the operation of the maglev train adopts the stopping point stepping mode; that is, the current ASA is always the target point of operation during the stepping process of the train [5][6][7][8][9][10]. As the basis of the two-dimensional speed protection mode and the stopping point stepping mode, the layout of the auxiliary stopping area is related to the safety of train operation, operation efficiency, and construction cost [11].…”

Section: Introductionmentioning

confidence: 99%

Auxiliary Stopping Area Layout Method for High-Speed Maglev considering Multiple Speed Profiles and Bidirectional Operation

Dong

Zhao

et al. 2021

Journal of Advanced Transportation

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Auxiliary stopping area (ASA) is the key guarantee for high-speed maglev train operation safety. Aiming at the layout of the ASA along the track, this article constructs an optimized model of ASA layout and proposes a solving algorithm based on the single target genetic algorithm by analyzing the influence factors of ASA layout. The result of the numerical experiment shows that the proposed method could fulfill the requirements of the maglev train operation safety and efficiency and optimize the cost of the ASA layout while taking the complex line situation, train tracking operation, and bidirectional operation on a single line into account.

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“…utilised dynamic programming and mixed integer linear programming (MILP) to formulate the energy-efficient speed trajectory problem of the medium-speed maglev system considering the impact of auxiliary stopping areas and non-linear resistance. 9 Goverde et al. applied a computational framework that connects pseudospectral methods with the minimum-time train control (MTTC) problem and energy-efficient train control (EETC) problem, aiming at improving the flexibility and accuracy of calculation.…”

Section: Introductionmentioning

confidence: 99%

Notch-based speed trajectory optimisation for high-speed railway automatic train operation

Feng

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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Automatic train operation (ATO) systems are fast becoming one of the key components of the intelligent high-speed railway (HSR). Designing an effective optimal speed trajectory for ATO is critical to guide the high-speed train (HST) to operate with high service quality in a more energy-efficient way. In many advanced HSR systems, the traction/braking systems would provide multiple notches to satisfy the traction/braking demands. This paper modelled the applied force as a controlled variable based on the selection of notch to realise a notch-based train speed trajectory optimisation model to be solved by mixed integer linear programming (MILP). A notch selection model with flexible vertical relaxation was proposed to allow the traction/braking efforts to change dynamically along with the selected notch by introducing a series of binary variables. Two case studies were proposed in this paper where Case study 1 was conducted to investigate the impact of the dynamic notch selection on train operations, and the optimal result indicates that the applied force can be flexibly adjusted corresponding to different notches following a similar operation sequence determined by optimal train control theory. Moreover, in addition to the maximum traction/braking notches and coasting, medium notches with appropriate vertical relaxation would be applied in accordance with the specific traction/braking demands to make the model feasible. In Case study 2, a comprehensive numerical example with the parameters of CRH380AL HST demonstrates the robustness of the model to deal with the varying speed limit and gradient in a real-world scenario. The notch-based model is able to obtain a more realistic optimal strategy containing dynamic notch selection and speed trajectory with an increase (1.622%) in energy consumption by comparing the results of the proposed model and the non-notch model.

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Energy-efficient speed profile optimization for medium-speed maglev trains

Cited by 22 publications

References 39 publications

Auxiliary Stopping Area Layout Method for High-Speed Maglev Operated Bidirectionally on Single Track

Auxiliary Stopping Area Layout Method for High-Speed Maglev Operated Bidirectionally on Single Track

Auxiliary Stopping Area Layout Method for High-Speed Maglev considering Multiple Speed Profiles and Bidirectional Operation

Notch-based speed trajectory optimisation for high-speed railway automatic train operation

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