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An Average Model of DC–DC Step-Up Converter Considering Switching Losses and Parasitic Elements

Author

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  • Marco Faifer

    (Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy)

  • Luigi Piegari

    (Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy)

  • Marco Rossi

    (RSE, Ricerca sul Sistema Energetico, Via Rubattino, 20134 Milan, Italy)

  • Sergio Toscani

    (Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy)

Abstract

Power electronic converters represent a pillar of modern power systems, especially since generation from renewable energy sources, such as photovoltaics, have been introduced. One of their main characteristics consists of the high flexibility in converting different voltage levels and waveforms. As for all the conversion devices, they are subjected to unavoidable losses introduced by non-ideal components. For this reason, in the last few decades numerous research activities have been devoted to model their behavior and predicting the global efficiency. In spite of the number of scientific publications on the topic, the non-idealities have been rarely studied in terms of their impact on the input-output characteristics of the converter. In this paper, the conventional equivalent circuit of a step-up DC/DC converter has been upgraded in order to introduce the effects of both conduction and switching losses. The obtained formulation, applicable to all DC/DC converters, allows a more accurate average model that is particularly suitable for the study of multi-converter architectures, as for the most recent renewable energy sources applications. Finally, thanks to a dedicated test setup, the results of an experimental campaign demonstrate how the new formulation faithfully predicts its electrical behavior.

Suggested Citation

  • Marco Faifer & Luigi Piegari & Marco Rossi & Sergio Toscani, 2021. "An Average Model of DC–DC Step-Up Converter Considering Switching Losses and Parasitic Elements," Energies, MDPI, vol. 14(22), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7780-:d:683536
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    References listed on IDEAS

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    1. Qi, Nanjian & Yin, Yajiang & Dai, Keren & Wu, Chengjun & Wang, Xiaofeng & You, Zheng, 2021. "Comprehensive optimized hybrid energy storage system for long-life solar-powered wireless sensor network nodes," Applied Energy, Elsevier, vol. 290(C).
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    1. Lebogang Masike & Michael Njoroge Gitau & Grain P. Adam, 2022. "A Unified Rule-Based Small-Signal Modelling Technique for Two-Switch, Non-Isolated DC–DC Converters in CCM," Energies, MDPI, vol. 15(15), pages 1-23, July.
    2. Marco Bosi & Albert-Miquel Sánchez & Francisco Javier Pajares & Alessandro Campanini & Lorenzo Peretto, 2023. "PLF Design for DC-DC Converters Based on Accurate IL Estimations," Energies, MDPI, vol. 16(5), pages 1-18, February.
    3. Martin A. Alarcón-Carbajal & José E. Carvajal-Rubio & Juan D. Sánchez-Torres & David E. Castro-Palazuelos & Guillermo J. Rubio-Astorga, 2022. "An Output Feedback Discrete-Time Controller for the DC-DC Buck Converter," Energies, MDPI, vol. 15(14), pages 1-21, July.
    4. Angelo Lunardi & Luís F. Normandia Lourenço & Enkhtsetseg Munkhchuluun & Lasantha Meegahapola & Alfeu J. Sguarezi Filho, 2022. "Grid-Connected Power Converters: An Overview of Control Strategies for Renewable Energy," Energies, MDPI, vol. 15(11), pages 1-33, June.

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