Energy Storage Scheme for Rail-guided Shuttle using Ultracapacitor and Battery
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16-10-2010, 02:36 PM

Energy Storage Scheme for Rail-guided Shuttle using
Ultracapacitor and Battery

R. Li, A. Pottharst, N. Fröhleke, J. Böcker
Institute for Power Electronics and Electrical Drives
University of Paderborn
Paderborn, D-33098 Germany

Abstract -

An energy storage system based on a combination of batteries and ultracapacitors for rail-guided shuttle is investigated. The control schemes according to the various power requirements in shuttles and the differing characteristics of these storage devices are proposed to manage the energy and optimize the power supply system performance. The power electronic converters connecting ultracapacitors, batteries and DC-link are studied. Simulation and measured results are presented, revealing that the separation of the dynamic load from batteries yield improvements in lifecycle, availability and long term costs and volume.


Electrical energy storage units are the necessary elements for the operation of hybrid electric vehicles or rail guided shuttles. At present in most of these applications, the high energy density batteries, sized to provide both the energy and power required, are usually applied as the energy storage component. In load cases such as acceleration or driving on a bumpy road with a vehicle facilitated with an active suspension, the power required is relatively higher than the normal driving conditions, and the periods of peak power are relatively short, generally less than 30 seconds. Therefore a peak power energy storage unit is required, which can drastically relieve the dynamic stress of the battery

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