Simulation research on rail transit traction grid voltage stabilization and its energy saving effects based on BESS

Author(s): Shili Lin*, Wenji Song, Ziping Feng
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China
International Journal of Smart Grid and Clean Energy, vol. 3, no. 4, October 2014: pp. 431-436
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.3.4.
431-436

AbstractIn order to realize voltage stabilization and energy saving of rail transit traction supply system, a Li-ion battery energy storage system (BESS) is presented for application in the DC traction grid to reuse the braking energy of the vehicles. According to the models of traction substation, power lines and vehicles, the braking energy saved by BESS is calculated in MatLAB/Simulink, and the performances of stabling the DC grid voltage are simulated with BESS and braking resistor respectively. By comparing the simulation results, it shows that the BESS could achieve good effects of DC grid voltage stabilization not only during the braking process but also during the traction process of the vehicles. Furthermore, the BESS is tested and verified to absorb and recycle the braking energy availably; therefore, it could well meet the purposes of clean energy and green travel of rail transit.

KeywordsRail transit, braking energy, battery energy storage system

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