A Multiple Train Trajectory Optimization to Minimize Energy Consumption and Delay

Zhao, Ning; Roberts, Clive; Hillmansen, Stuart; Nicholson, Gemma

doi:10.1109/tits.2014.2388356

Cited by 97 publications

(61 citation statements)

References 21 publications

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“…China has the greatest amount of high-speed railways in service in the world, over 22,000 km by the end of 2016. With the rapid development of high-speed and heavy-haul railways, modern high power locomotives and electric multiple units (EMUs) have been designed and applied in main railway lines [3][4][5]. Their high power consumption has brought about a problem of insufficient power supply capacity (PSC) [6] of the single-phase 25 kV or 2 × 25 kV alternating current (AC) traction power supply systems (TPSSs) that are widely adopted to feed trains [7].…”

Section: Introductionmentioning

confidence: 99%

A Novel Power Flow Algorithm for Traction Power Supply Systems Based on the Thévenin Equivalent

2018

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Abstract:With the rapid development of high-speed and heavy-haul railways throughout China, modern large power locomotives and electric multiple units (EMUs) have been applied in main railway lines. The high power requirements have brought about the problem of insufficient power supply capacity (PSC) of traction power supply systems (TPSSs). Thus, a convenient method of PSC assessment is meaningful and urgently needed. In this paper, a novel algorithm is proposed based on the Thévenin equivalent in order to calculate the PSC. In this algorithm, node voltage equations are converted into port characteristic equations, and the Newton-Raphson method is exploited to solve them. Based on this algorithm, the PSC of a typical high-speed railway is calculated through the repeated power flow (RPF). Subsequently, the effects of an optimized organization of train operations are analyzed. Compared to conventional algorithms, the proposed one has the advantages of fast convergence and an easy approach to multiple solutions and PV curves, which show vivid and visual information to TPSS designers and operators. A numerical analysis and case studies validate the effectiveness and feasibility of the proposed method, which can help to optimize the organization of train operations and design lines and enhance the reliability and safety of TPSSs.

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Section: Introductionmentioning

confidence: 99%

A Novel Power Flow Algorithm for Traction Power Supply Systems Based on the Thévenin Equivalent

2018

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“…In [1], the authors investigated energy-saving operation under disturbance, where the problem was described in a mathematical model and an optimization model of energy-saving train operation was applied, and the model was solved by a changeable chromosome-length genetic algorithm. Paper [2] considered the extra energy consumption caused by knock-on delays. It described a train trajectory optimization study considering the tradeoff between reductions in train energy usage against increases in the delay penalty in a delay situation with a fixed block signaling system, and a multitrain simulator was developed for the study.…”

Section: Introductionmentioning

confidence: 99%

A High-Speed Train Operation Plan Inspection Simulation Model

Yang

Mou

Jiang

2018

Mathematical Problems in Engineering

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We developed a train operation simulation tool to inspect a train operation plan. In applying an improved Petri Net, the train was regarded as a token, and the line and station were regarded as places, respectively, in accordance with the high-speed train operation characteristics and network function. Location change and running information transfer of the high-speed train were realized by customizing a variety of transitions. The model was built based on the concept of component combination, considering the random disturbance in the process of train running. The simulation framework can be generated quickly and the system operation can be completed according to the different test requirements and the required network data. We tested the simulation tool when used for the real-world Wuhan to Guangzhou high-speed line. The results showed that the proposed model can be developed, the simulation results basically coincide with the objective reality, and it can not only test the feasibility of the high-speed train operation plan, but also be used as a support model to develop the simulation platform with more capabilities.

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“…In order to reduce the searching time, a number of researchers have developed mathematical models and computer programs to optimize the single train trajectory from a theoretical point of view [4][5][6]. The authors have previously presented a multiple train trajectory optimization paper to consider the balance between energy consumption and train delays [7]. However, only a small number of trains were included in the methodology.…”

Section: Introductionmentioning

confidence: 99%