EPE Association: EPE 2005 - Topic 13-2 - LS: Energy storage components and systems

EPE 2005 - Topic 13-2 - LS: Energy storage components and systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 13: POWER ELECTRONICS AND DRIVES IN AEROSPACE, SPACE AND SURFACE TRANSPORT > EPE 2005 - Topic 13-2 - LS: Energy storage components and systems

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   A 200kVA prototype of Kinetic Energy Storage System based on Switched Reluctance Machine Technology
By LAFOZ Marcos [View]
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Abstract: This paper presents the development of a 200kVA and 200MJ Kinetic Energy Storage System (KESS) Prototype, based on a Switched Reluctance Machine to be applied in High Speed Trains. The main goal is to reduce the electric consumption peaks in a high speed railway substation. Both the reluctance machine design criteria and the power electronic converters solution are presented. The control algorithms for machine-side converter and network-side converter are also discussed. Moreover, a description of the dynamic behaviour of the electrical machine, several experimental results and some ideas about the external control system used for this application are included in this paper. The complete Energy Storage System will be a modular set of several 200 MJ units whose description is the aim of this paper.

   Energy Storage on Board of Railway Vehicles
By SCHOLTEN Johannes; STEINER Michael [View]
[Download]

Abstract: The proposed energy storage on board of a Railway vehicle leads to a big step in the reduction of consumed en-ergy. Up to 30\% energy saving are measured in a prototype light rail vehicle, at the same time reducing the peak power demand drastically. Additionally, operation without catenary for several hundred meters was successfully demonstrated with the prototype light rail vehicle driving with switched off pantograph. This prototype vehicle is in passenger operation since September 2003, the implemented software is optimized on energy savings. About two years experience is available and the results are convincing. Applying the energy storage to Diesel-Electrical Multiple Units leads to fuel savings and provides a “booster” effect on the acceleration performance. The stored energy is adding additional power on top of the diesel engine power during acceleration. Compared to original Diesel power, this additional power can be provided with a relatively low additional weight. Finally, the energy savings of up to 30\% and the corresponding emission reduction will already fulfill the targets of various local and global energy saving programs set up by e.g. European Union and big railway operators.

   The direct parallel combination of a valve regulated lead acid cell and supercapacitor for use as a hybrid vehicle peak power buffer.
By STONE Dave; BENTLEY Paul [View]
[Download]

Abstract: The performance of a standard, production valve regulated lead acid (VRLA) cell has been improved by paralleling with combinations of supercapacitors. The supercapacitors act to lower the source impedance of the combination providing a much-enhanced performance. Transient voltage swings are suppressed and the rms voltage is supported. Low temperature performance may also be improved due to the characteristics of the supercapacitor. These enhancements are described for various combinations of cell and supercapacitor under realistic hybrid vehicle power demands. A simple model is proposed and used to demonstrate supercapacitor size requirements for optimal current in the parallel cell.

EPE 2005 - Topic 13-2 - LS: Energy storage components and systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 13: POWER ELECTRONICS AND DRIVES IN AEROSPACE, SPACE AND SURFACE TRANSPORT > EPE 2005 - Topic 13-2 - LS: Energy storage components and systems
	[return to parent folder]

	A 200kVA prototype of Kinetic Energy Storage System based on Switched Reluctance Machine Technology By LAFOZ Marcos	[View] [Download]
Abstract: This paper presents the development of a 200kVA and 200MJ Kinetic Energy Storage System (KESS) Prototype, based on a Switched Reluctance Machine to be applied in High Speed Trains. The main goal is to reduce the electric consumption peaks in a high speed railway substation. Both the reluctance machine design criteria and the power electronic converters solution are presented. The control algorithms for machine-side converter and network-side converter are also discussed. Moreover, a description of the dynamic behaviour of the electrical machine, several experimental results and some ideas about the external control system used for this application are included in this paper. The complete Energy Storage System will be a modular set of several 200 MJ units whose description is the aim of this paper.

	Energy Storage on Board of Railway Vehicles By SCHOLTEN Johannes; STEINER Michael	[View] [Download]
Abstract: The proposed energy storage on board of a Railway vehicle leads to a big step in the reduction of consumed en-ergy. Up to 30\% energy saving are measured in a prototype light rail vehicle, at the same time reducing the peak power demand drastically. Additionally, operation without catenary for several hundred meters was successfully demonstrated with the prototype light rail vehicle driving with switched off pantograph. This prototype vehicle is in passenger operation since September 2003, the implemented software is optimized on energy savings. About two years experience is available and the results are convincing. Applying the energy storage to Diesel-Electrical Multiple Units leads to fuel savings and provides a “booster” effect on the acceleration performance. The stored energy is adding additional power on top of the diesel engine power during acceleration. Compared to original Diesel power, this additional power can be provided with a relatively low additional weight. Finally, the energy savings of up to 30\% and the corresponding emission reduction will already fulfill the targets of various local and global energy saving programs set up by e.g. European Union and big railway operators.

	The direct parallel combination of a valve regulated lead acid cell and supercapacitor for use as a hybrid vehicle peak power buffer. By STONE Dave; BENTLEY Paul	[View] [Download]
Abstract: The performance of a standard, production valve regulated lead acid (VRLA) cell has been improved by paralleling with combinations of supercapacitors. The supercapacitors act to lower the source impedance of the combination providing a much-enhanced performance. Transient voltage swings are suppressed and the rms voltage is supported. Low temperature performance may also be improved due to the characteristics of the supercapacitor. These enhancements are described for various combinations of cell and supercapacitor under realistic hybrid vehicle power demands. A simple model is proposed and used to demonstrate supercapacitor size requirements for optimal current in the parallel cell.