Single-switch boost-buck DC-DC converter for industrial fuel cell and photovoltaics applications |
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Affiliation: | 1. Department of Electronic Engineering, University of York, York, YO10 5DD, UK;2. Department of Engineering and Technology, University of Huddersfield, Huddersfield, HD1 3DH, UK |
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Abstract: | The realization of dc-dc converters performs a vital function in exploiting renewable energy sources such as solar photovoltaic (PV) and fuel cell applications. This paper demonstrates a single-switch unidirectional buck-boost dc-dc converter for continuous power flow control, excluding the hybrid switched-capacitor. The proposed converter utilizes a limited number of passive components, only four diodes and three inductors required, in addition to six capacitors. The converter can operate at a wide input voltage range with continues input current. The converter has experimented under real-time conditions with 660 W PV system. The obtained efficiency ranges from 93% to 98%. Furthermore, the converter has interfaced with 550 W fuel cell operated under different fuel pressure. The realized efficiency ranges from 91% to 97%. The maximum measured inductance current ripple is limited to under 0.70 A in both scenarios, whereas 0.16 V is the maximum output voltage ripple. |
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Keywords: | dc-dc converter Renewable energy Fuel cell PV system Buck converter Boost converter |
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