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Design and Experimental Validation of a Single-Stage PV String Inverter with Optimal Number of Interleaved Buck-Boost Cells

Author

Listed:
  • Artem Fesenko

    (Department of Radiotechnics and Embedded Systems, Chernihiv Polytechnic National University, 14039 Chernihiv, Ukraine)

  • Oleksandr Matiushkin

    (Department of Radiotechnics and Embedded Systems, Chernihiv Polytechnic National University, 14039 Chernihiv, Ukraine
    Power Electronics Research Group, Tallinn University of Technology, 19086 Tallinn, Estonia)

  • Oleksandr Husev

    (Department of Radiotechnics and Embedded Systems, Chernihiv Polytechnic National University, 14039 Chernihiv, Ukraine
    Power Electronics Research Group, Tallinn University of Technology, 19086 Tallinn, Estonia)

  • Dmitri Vinnikov

    (Power Electronics Research Group, Tallinn University of Technology, 19086 Tallinn, Estonia)

  • Ryszard Strzelecki

    (Faculty of Electrical and Control Engineering, Gdansk University of Technology, 80233 Gdansk, Poland)

  • Piotr Kołodziejek

    (Faculty of Electrical and Control Engineering, Gdansk University of Technology, 80233 Gdansk, Poland)

Abstract

Increasing converter power density is a problem of topical interest. This paper discusses an interleaved approach of the efficiency increase in the buck-boost stage of an inverter with unfolding circuit in terms of losses in semiconductors, output voltage ripples and power density. Main trends in the power converter development are reviewed. A losses model was designed and used for the proposed solution to find an optimal number of interleaved cells. It describes static and dynamic losses in semiconductor switches for buck and boost mode. The presented calculation results demonstrate the efficiency of the interleaved approach for photovoltaic system. 1 kW power converter prototype was designed with two parallel dc-dc cells for experimental verification of obtained theoretical results. The experimental results confirm theoretical statements.

Suggested Citation

  • Artem Fesenko & Oleksandr Matiushkin & Oleksandr Husev & Dmitri Vinnikov & Ryszard Strzelecki & Piotr Kołodziejek, 2021. "Design and Experimental Validation of a Single-Stage PV String Inverter with Optimal Number of Interleaved Buck-Boost Cells," Energies, MDPI, vol. 14(9), pages 1-17, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2448-:d:543217
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    Cited by:

    1. Mohammadreza Azizi & Oleksandr Husev & Dmitri Vinnikov, 2022. "Single-Stage Buck–Boost Inverters: A State-of-the-Art Survey," Energies, MDPI, vol. 15(5), pages 1-16, February.

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