Research on Demand Analysis and Optimal Allocation of Rail Transit Hybrid Energy Storage Based on the Electric Traction Model

• Published in: Energies (Basel) Vol. 15; no. 19; p. 6970
• Main Authors: Xin, Dixi, Li, Jianlin, Ma, Suliang, Liu, Chang’an
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-10-2022
• Subjects: Algorithms; Analysis; Batteries; Configuration management; Electric power grids; Electric railroads; Energy consumption; Energy management systems; Energy storage; Flywheels; hybrid energy storage; Lithium; Lithium batteries; Mathematical optimization; Optimization; optimized volume; Power electronics; Power supply; rail transit; Railroads; traction model
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en15196970

With the development of power transmission technology and power electronics, electrified railroads are widely used and pose a great challenge for the power grid. Hybrid energy storage integrates different advantages of multiple energy storage and can cope with the complex energy situation of rail transit. The complementary characteristics of lithium batteries and flywheels in terms of techno-economic indicators make them the main form of hybrid energy storage. In this paper, we analyze the power demand during train operation by studying the electromechanical characteristics of the rail transit traction process. On this basis, hybrid energy storage is configured to meet the power demand, and particle swarm optimization is chosen as the solution tool to perform the capacity configuration of lithium battery and flywheel in this paper. Finally, this paper proves the feasibility of the proposed theory by arithmetic example analysis, and it is shown that the proposed scheme can achieve a high percentage of energy reuse and low application cost.