Energy efficiency emergence of high-speed train operation and systematic solutions for energy efficiency improvement
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Energy efficiency emergence of high‑speed train operation and systematic solutions for energy efficiency improvement Deng Pan1 · Zejun Chen1 · Meng Mei1 Received: 24 November 2019 / Accepted: 4 April 2020 © Springer Nature Switzerland AG 2020
Abstract Different from the concept of energy consumption, the energy efficiency reflects the efficiency of using energy resource and the service-oriented business philosophy of railway transportation enterprises. The energy efficiency of high-speed train operation is mainly embodied in the operation stage of railway transportation system, but involves a number of factors during the whole life cycle of railway transportation system. Based on the above understanding, the principle of making gradual and orderly progress is followed to broaden our research vision in space and time so that the global energy efficiency of high-speed train operation can be better studied. Firstly, we describe in detail the definition of the operational energy efficiency of high-speed train. Then the energy efficiency model of high-speed train operation is established to reveal the energy efficiency emergence mechanism of high-speed train operation. The simulation is carried out to analyze the complex influence of train light-weighting, control scheme, load ratio, and different inter-station distance on the operational energy efficiency of high-speed train moving through a block section. The proportion of the braking energy consumption of high-speed train with the non-regenerative braking mode is calculated in real time so that the maximum amount of available regenerative braking energy can be known for the better design of the regenerative energy recycling system in the future. This study can help to get the systematic solutions to further improve the operational energy efficiency of all in-service high-speed trains. Keywords High-speed train · Energy efficiency · Service orientation · Emergence · Train control · Transportation organization
1 Introduction How to reduce energy consumption and improve efficiency of high-speed railway transportation systems has long been one of hot research topics internationally. Many scientists, scholars, and engineers made great efforts and obtained a lot of theoretical and applied achievements, which substantially promote the rapid development of railway transportation. In the 1950s, energy-saving train operation was first studied [1], the sequential space–time optimized combination of traction, coasting, and braking conditions under the constraints of railroad conditions, train performance,
wheel–rail interaction, and air drag, etc. was focused on to get the expected energy-saving speed profile between two successive stations for train control [2, 3]. The recycle of regenerative energy during train braking is another important technology to reduce energy consumption, and can be divided into two categories [4]: the direct use of regenerative energy [5, 6] and the indirect use of regenerative energy [7–11]. The former has a high requirement on train timetable,
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