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The architecture of the UPS based on PEM Fuel Cell (PEMFC) is investigated. Firstly, the output characteristics of PEMFC are studied. High efficiency power conversion from hydrogen energy to electric power is emphasized. The characteristics match between PEMFC and load is another key issue. Energy & power management for FC-UPS is explored to satisfy both the load dynamics and PEMFC optimal operation...
This paper investigates a three-phase four-wire fuel cell power system. The system is sensitive to the load characteristic in a stand-alone mode, because variation or unbalance of the three-phase load will affect the safety and lifespan of the fuel cell. A novel power management unit (PMU) with its control strategy is proposed. The PMU can compensate fuel cell slow dynamics. In addition, the PMU acts...
For the UPS using fuel cell as the backup power (Fuel Cell UPS), since the dynamics of fuel cell could not fulfill the requirements of the critical load, power management unit (PMU) is indispensable to fill the power gap at the time of load change or operation mode transfer. In this paper, a method utilizing the PMU to compensate low frequency ripple current on DC link is studied, which makes much...
Since the fuel cell (FC) is expensive now, it is worth to optimize the performance of power conversion system (PCS) for raising utilization of fuel cell. This paper presents an approach to investigate the power conversion topology for fuel cell power generation system. Firstly, through analyzing the demands of fuel cell power conversion system, the PCS structures are synthesized and an optimal PCS...
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