Intelligent uninterruptible power supply system with back-up fuel cell/battery hybrid power source |
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Authors: | Yuedong Zhan Youguang Guo Jianguo Zhu Hua Wang |
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Affiliation: | 1. Department of Automation, Kunming University of Science and Technology, Kunming 650093, China;2. Faculty of Engineering, University of Technology, Sydney, PO Box 123, Broadway, NSW 2007, Australia |
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Abstract: | This paper presents the development of an intelligent uninterruptible power supply (UPS) system with a hybrid power source that comprises a proton-exchange membrane fuel cell (PEMFC) and a battery. Attention is focused on the architecture of the UPS hybrid system and the data acquisition and control of the PEMFC. Specifically, the hybrid UPS system consists of a low-cost 60-cell 300 W PEMFC stack, a 3-cell lead–acid battery, an active power factor correction ac–dc rectifier, a half-bridge dc–ac inverter, a dc–dc converter, an ac–dc charger and their control units based on a digital signal processor TMS320F240, other integrated circuit chips, and a simple network management protocol adapter. Experimental tests and theoretical studies are conducted. First, the major parameters of the PEMFC are experimentally obtained and evaluated. Then an intelligent control strategy for the PEMFC stack is proposed and implemented. Finally, the performance of the hybrid UPS system is measured and analyzed. |
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Keywords: | Uninterruptible power supply Proton-exchange membrane fuel cell Lead&ndash acid battery Hybrid power source Back-up and emergency power Intelligent control |
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