Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference (한국조명전기설비학회:학술대회논문집)
- 2008.10a
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- Pages.183-187
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- 2008
A Power Control Scheme of a Fuel Cell Hybrid Power Source
- Song, Yu-Jin (Korea Institute of Energy Research) ;
- Han, S.B. (Korea Institute of Energy Research) ;
- Park, S.I. (Korea Institute of Energy Research) ;
- Jeong, H.G. (Korea Institute of Energy Research) ;
- Jung, B.M. (Korea Institute of Energy Research) ;
- Kim, G.D. (Korea Institute of Energy Research) ;
- Yu, S.W. (Korea Institute of Energy Research)
- 송유진 (에너지기술연구원) ;
- 한수빈 (에너지기술연구원) ;
- 박석인 (에너지기술연구원) ;
- 정학근 (에너지기술연구원) ;
- 정봉만 (에너지기술연구원) ;
- 김규덕 (에너지기술연구원) ;
- 유승원 (에너지기술연구원)
- Published : 2008.10.17
Abstract
This paper describes a power control scheme to improve the performance of a fuel cell battery hybrid power source for residential application. The proposed power control scheme includes a power control strategy to control the power flow of the fuel cell hybrid power system and a digital control technique for a front-end dc-dc converter of the fuel cell. The power control strategy enables the fuel cell to operate within the high efficiency region defined by the polarization curve and efficiency curve of the fuel cell. A dual boost converter with digital control is applied as a front-end dc-dc converter to control the fuel cell output power. The digital control technique of the converter employs a moving-average digital filter into its voltage feedback loop to cancel the low frequency harmonic current drawn from the fuel cell and then limits the fuel cell output current to a current limit using a predictive current limiter to keep the fuel cell operation within the high efficiency region as well as to minimize the fuel cell oxygen starvation.