A Dynamic Model of a PEM Fuel Cell System

Author

Lee, J.M. ; Cho, B.H.

Author_Institution

Fuel Cell Vehicle Team, Hyundai Motor Co. & Kia Motors Corp.

fYear

2009

fDate

15-19 Feb. 2009

Firstpage

720

Lastpage

724

Abstract

The steady states and dynamics of a fuel cell system are influenced by both operating conditions and the frequency characteristics of electrochemical reactions in a cell. A dynamic model of a practical fuel cell system, based on an analytical theory and empirical data, is proposed. The model consists of three parts, such as an open circuit voltage model including fuel flow and reaction in channels, an equivalent circuit model caused by voltage losses of electrochemical reactions in a cell, and an air compressor model (a fuel supply model among auxiliary systems in a fuel cell system). It will be useful to design the power system and control strategy and to analyze the system dynamics in a fuel cell power system. The model is verified by experiments of 1kW PEM FC system. The dynamics of its OCV(open circuit voltage) by fuel flow effect, and the frequency characteristics of reaction dynamics in a cell are verified by experiments.

Keywords

compressors; equivalent circuits; power systems; proton exchange membrane fuel cells; PEM fuel cell system; air compressor; channel reaction; dynamic model; electrochemical reactions; equivalent circuit model; fuel cell power system; fuel flow; open circuit voltage model; power 1 kW; Circuits; Frequency; Fuel cells; Power system analysis computing; Power system control; Power system dynamics; Power system modeling; Power systems; Steady-state; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE

Conference_Location

Washington, DC

ISSN

1048-2334

Print_ISBN

978-1-4244-2811-3

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2009.4802740

Filename

4802740