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Fixed Energy Storage Technology Applied for DC Electrified Railway
Author(s) -
Konishi Takeshi,
Morimoto Hiroaki,
Aihara Toru,
Tsutakawa Masaru
Publication year - 2010
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.20529
Subject(s) - energy storage , automotive engineering , electrical engineering , battery (electricity) , engineering , energy recovery , energy consumption , capacitor , electric potential energy , energy (signal processing) , resistor , supercapacitor , voltage , dynamic braking , brake , power (physics) , chemistry , statistics , physics , mathematics , electrode , quantum mechanics , electrochemistry
The fixed energy storage system solves the problem of rising energy costs by reducing primary energy consumption. Without a fixed energy storage system, the energy generated by a braking vehicle would be simply converted into waste heat by its braking resistors if no other vehicles are powered simultaneously. Because, as a rule, such synchronized braking and powering cannot be coordinated, the energy storage system stores the energy generated during braking and discharges it again when a vehicle is powered. This greatly reduces primary energy demand in the substation. However, in addition to this energy saving, the energy storage system contributes to the reduction of CO 2 emissions. The energy storage system also stabilizes the system voltage. Recent years have witnessed an advance in the energy storage media technology. Developments of energy storage media, lithium ion battery, nickel‐metal hydride battery, and electric double‐layer capacitors (EDLCs) have been remarkable. This study introduces technologies of fixed energy storage system applicable for DC electrified railway in Japan, and describes two examples of charge/discharge characteristics. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.