Single-switch boost-buck DC-DC converter for industrial fuel cell and photovoltaics applications

Mahmoud Dhimish, Nigel Schofield

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1241-1255
Number of pages15
JournalInternational Journal of Hydrogen Energy
Issue number2
Early online date10 Nov 2021
Publication statusPublished - 5 Jan 2022


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