Title :
A dynamic discharge structure for ultracapacitor application in the fuel cell UPS
Author :
Jia, J. ; Wang, Y. ; Li, S. ; Wang, G.
Abstract :
Proton exchange membrane (PEM) fuel cell uninterrupted power supply (UPS) has been getting much attention recently. Fuel cell UPS needs another bridge power to smooth from the utility to the fuel cell because the fuel cell stack takes a certain time to start up. Batteries play the role conventionally. Ultracapacitor has many advantages compared with batteries excepts a problem: ultracapacitor voltage drops sharply while discharging. This paper studied a dynamic discharge structure model for ultracapacitor application in a 3 kW base station UPS. The duration of holding valid voltage by the dynamic discharge structure is more than twice comparing to the static discharge structure. Also the dynamic discharge structure has a better efficiency than the static discharge structure using a DC/DC converter to extend the duration.
Keywords :
proton exchange membrane fuel cells; supercapacitors; uninterruptible power supplies; PEM fuel cell; bridge power; dynamic discharge structure; fuel cell UPS; power 3 kW; proton exchange membrane fuel cell; static discharge structure; ultracapacitor voltage; uninterrupted power supply; Base stations; Batteries; Biomembranes; Bridge circuits; Fuel cells; Power supplies; Protons; Supercapacitors; Uninterruptible power systems; Voltage; discharge; dynamic; energy released; fuel cell UPS; simulation; static; ultracapacitor;
Conference_Titel :
Control, Automation, Robotics and Vision, 2008. ICARCV 2008. 10th International Conference on
Conference_Location :
Hanoi
Print_ISBN :
978-1-4244-2286-9
Electronic_ISBN :
978-1-4244-2287-6
DOI :
10.1109/ICARCV.2008.4795855
