Modeling and Control of a Fuel Cell Based Z-Source Converter

Jin-Woo Jung, Min Dai, and Ali Keyhani
Ohio State Univ., Columbus, OH, USA ;
 

Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, APEC' 05, Vol.2, pp.1112-1118, March 2005
Date: March 6-10, 2005
Location: Austin, TX

Abstract:
For more practical realization of the fuel cell powered systems, a dynamics of the fuel cells with a slow response unlike energy storage devices such as batteries or flywheels may be considered. Based on complicated physical and chemical processes, mathematical dynamic models of the fuel cells have been presented. On the other hand, a simple mathematical model like a second order model or a first order time delay circuit have been proposed for the dynamics of the fuel cells. Of recent years, design of controllers and conventional power converters that are inexpensive, small-sized, and light-weighted for residential applications of fuel cells has been attractive in the field of Power Electronics and the fuel cells have been represented by a DC voltage source. A Z-source converter that can boost a DC-link voltage by employing L-C impedance components and a shoot-through without any boost converter is proposed and shows its operation under only a linear/heavy load and an open-loop control without considering a dynamics of the fuel cell.