Abstract
AbstractAs a large energy consumer, the railway systems in many countries have been electrified gradually for the purposes of performance improvement and emission reduction. With the widespread utilization of energy-saving technologies such as regenerative braking techniques, and in support of the full electrification of railway systems in a wide range of application conditions, energy storage systems (ESSes) have come to play an essential role. In this paper, some recent developments in railway ESSes are reviewed and a comprehensive comparison is presented for various ESS technologies. The foremost functionalities of the railway ESSes are presented together with possible solutions proposed from the academic arena and current practice in the railway industry. In addition, the challenges and future trends of ESSes in the railway industry are briefly discussed.
Highlights
Climate change and environmental sustainability have drawn substantial worldwide public attention in the past decade
vanadium redox flow batteries (VRFBs) can offer some distinctive features in comparison with other conventional batteries, they are still impractical for commercial applications due to limitations of flow rate, energy density, power density and operational cost [65]
This paper has presented a comprehensive review of different ESS technologies that can be used in railway systems
Summary
Climate change and environmental sustainability have drawn substantial worldwide public attention in the past decade. As one of the largest energy consumers, transportation has been moving towards electrification, since electrical energy provides a number of environmental benefits due to the significant uptake of renewable energies in electric power systems. There is a growing interest in improving the energy efficiency of railway vehicles; in particular, braking energy recovery has drawn substantial attention. Due to the widespread utilization of regenerative braking technologies, electric railway vehicles are able to convert the kinetic energy (in the braking phase) into electric energy for the purpose of energy.
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