Non-Isolated Current-Fed Series Resonant Converter with Hybrid Control Algorithms for DC Microgrid

Byungki Kim and Hwa-Pyeong Park ()
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Byungki Kim: Power System Research Team, Korea Institute of Energy Research (KIER), Jeju 63357, Republic of Korea
Hwa-Pyeong Park: School of Electronics Engineering, Kumoh National Institute of Technology (KIT), Gumi 39177, Republic of Korea

Energies, 2023, vol. 16, issue 16, 1-16

Abstract: Module-level power electronics can optimize the power generation of photovoltaic panels, which requires a simple topology structure, high power conversion efficiency, and wide voltage gain, corresponding to irradiance variations. This paper proposes a non-isolated current-fed L-C series resonant converter and its control algorithms. The proposed converter can obtain a buck–boost voltage gain with the hybrid control algorithm utilizing the switching frequency modulation and asymmetric pulse width modulation. The proper power stage design can guarantee the soft-switching capability for the entire operating range. Also, the control strategy is designed to obtain a small rms current. The operational principle of proposed converter is analyzed in order to design the resonant tank and control strategy. The performance of designed converter can be verified with the experimental results with a 500 W prototype converter.

Keywords: photovoltaic systems; DC optimizer; DC/DC converter; soft switching (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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