| Title |
An Improvement of Voltage Disturbances for Fuel Cell Systems |
| Authors |
문현욱(Moon Hyun-Wook) ; 정은진(Jeong Eun-Jin) ; 김윤호(Kim Yoon-Ho) |
| Keywords |
Fuel Cell Systems ; Voltage Disturbance ; Ultracapacitors |
| 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. |