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Title
Development and testing of a 200 MJ/350 kW kinetic energy storage system for railways applications
Subtitle
Meeting the challenges for future mobility: proceedings
Author
Garcia-Tabares, L
Iglesias, J
Lafoz, M
Martinez, JC
Vazquez, C
Tobajas, C
Gomez-Alors, A
Echeandia, A
Lucas , J
Zuazo, C
Carrasco, JM
Vázquez, S
Affiliation
ADIF, Spanish Railways
CIEMAT, Energy, Environment and Technology Research, Spain
Elytt Energy, Spain
TEKNIKER. Spain
GREENPOWER, Spain
Publication Date
2011
Conference
9th World Congress on Railway Research (WCRR) May 22-26 2011, Lille, France
Abstract
In 2003, the Spanish Manager for Railways Infrastructure (ADIF) in collaboration with CIEMAT (formerly CEDEX, an Institute belonging to the Public Works Ministry of Spain), launched a project for developing a flywheel energy storage system for power management in railways substations with the aims braking energy recovery in conventional lines supplied with 3000 V DC. At the time of presenting this paper, the first prototype of KESS (Kinetic Energy Storage System) is finished and has been tested at the CIEMAT facilities. Prior to these tests, two previous and smaller prototypes had been developed and tested in the same facilities. The system is based on the use of a metallic flywheel, a switched reluctance motor/generator (SRM) and the corresponding power electronics, including a machine side converter and a grid side converter. 200 MJ (55.6kWh) of energy can be stored in a high strength steel flywheel, rotating over 6.000 rpm, which is magnetically levitated and guided with conventional high speed bearings. A power of 350kW can be exchanged in the electrical machine which is a switched reluctance, 6/4 poles, motor-generator, working in either single pulse or hysteresis band, depending on its speed. The machine is driven with a full H converter per phase, bidirectional in voltage and current thus reducing magnetic losses in the rotor of the SRM. Finally there is a grid side converter connecting the grid of the substation to a dc-link previous to the machine converter in order to supply single phase loads, controlled using a double hysteresis-band current strategy. A specific and very robust digital control platform has also been developed for this application to manage the complete system.
File - click thumbnail to download
Physical Description
8p. ; PDF
Subjects
Rail transport
Infrastructure
Location
Server
ARRB library
Category
Rail Knowledge Bank Index
Operations
Train systems and processes
Rail Knowledge Bank Index
Infrastructure
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