Power Flow Simulation of Flywheel Energy Storage Systems for Tramways

 

N. Erd, X. Li, A. Binder

 

2017/04/25

Abstract

Energy storage devices, such as flywheel storages, can be used in railway systems, especially tramways, to save energy from being turned into heat in the braking resistor. This paper provides a quantitative analysis for the possible energy savings by using a flywheel energy storage system
in a tramway. For this purpose a flywheel is modeled considering various internal losses. Based on the defined operating strategy, the power flow of the traction system is analyzed for a given driving cycle. The energy consumption of a tram with a flywheel system is compared to the consumption of a conventional tram without an energy storage device and a tram with a storage device based on supercaps. Finally, the influence of the grid feedin power limit on the energy savings is analyzed.

Published in: Renewable Energy & Power Quality Journal (RE&PQJ, Nº. 15)
Pages: 149-153 Date of Publication: 2017/04/25
ISSN: 2172-038X Date of Current Version:
REF: 256-17 Issue Date: April 2017
DOI:10.24084/repqj15.256 Publisher: EA4EPQ

Authors and affiliations

N. Erd, X. Li, A. Binder
Institute of Electrical Energy Conversion, Graduate School of Excellence Energy Science and Engineering
Technische Universität Darmstadt. Germany

Key word

Flywheel, Energy Storage, Tramway, Train, Energy Savings, Supercap

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