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An Improvement of Voltage Disturbances for Fuel Cell Systems  

Moon Hyun-Wook (중앙대학 전자전기공학부)
Jeong Eun-Jin (중앙대학 전자전기공학부)
Kim Yoon-Ho (중앙대학 전자전기공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.54, no.5, 2005 , pp. 245-252 More about this Journal
Abstract
The fuel cell systems are one of very useful energy sources. The systems have advantages as renewable and environmental sources. To obtain AC components from fuel cells, it needs inverters. A multilevel converter is used as a power conversion system for a high power fuel cell system. Through harmonic analysis, it is shown that the harmonic components and THD increase while a fundamental component of output decreases as voltage droop increases. To solve the voltage disturbance problems, three different approaches are investigated in this paper; installation of a boost converter at the fuel cell output, control of pulse widths, and use of ultracapacitors. The proposed three approaches are analyzed and compared through simulation and experimental results.
Keywords
Fuel Cell Systems; Voltage Disturbance; Ultracapacitors;
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