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Photovoltaic Energy Yield Improvement in Two-Stage Solar Microinverters

Author

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  • Andrii Chub

    (Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
    Department of Electronics, Federico Santa Maria Technical University, 1680 Av. España, Valparaíso, Chile)

  • Dmitri Vinnikov

    (Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia)

  • Serhii Stepenko

    (Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
    Department of Information Measuring Technologies, Metrology and Physics, Chernihiv National University of Technology, 14027 Chernihiv, Ukraine)

  • Elizaveta Liivik

    (Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
    Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

  • Frede Blaabjerg

    (Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark)

Abstract

The focus in this paper is on the two-stage photovoltaic (PV) microinverters using a buck-boost dc/dc front-end converter. Wide input voltage range of the front-end converter enables operation under shaded conditions but results in mediocre performance in the typical voltage range. These microinverters can be controlled with either fixed or variable dc-link voltage control methods. The latter improves the converter efficiency considerably in the range of the most probable maximum power point (MPP) locations. However, the buck-boost operation of the front-end converter results in noticeable variations of the efficiency across the input voltage range. As a result, conventional weighted efficiency metrics cannot be used to predict annual energy productions by the microinverters. This paper proposes a new methodology for the estimation of annual energy production based on annual profiles of the solar irradiance and ambient temperature. Using this methodology, quantification of the annual energy production is provided for two geographical locations.

Suggested Citation

  • Andrii Chub & Dmitri Vinnikov & Serhii Stepenko & Elizaveta Liivik & Frede Blaabjerg, 2019. "Photovoltaic Energy Yield Improvement in Two-Stage Solar Microinverters," Energies, MDPI, vol. 12(19), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3774-:d:273335
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    References listed on IDEAS

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    1. Lang, Tillmann & Ammann, David & Girod, Bastien, 2016. "Profitability in absence of subsidies: A techno-economic analysis of rooftop photovoltaic self-consumption in residential and commercial buildings," Renewable Energy, Elsevier, vol. 87(P1), pages 77-87.
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    Cited by:

    1. Yazmín Yorely Rivera-Lugo & Kevin Isaac Pérez-Muñoz & Balter Trujillo-Navarrete & Carolina Silva-Carrillo & Edgar Alonso Reynoso-Soto & Julio Cesar Calva Yañez & Shui Wai Lin & José Roberto Flores-Her, 2020. "PtPd Hybrid Composite Catalysts as Cathodes for Proton Exchange Membrane Fuel Cells," Energies, MDPI, vol. 13(2), pages 1-12, January.
    2. Piotr Olczak, 2022. "Energy Productivity of Microinverter Photovoltaic Microinstallation: Comparison of Simulation and Measured Results—Poland Case Study," Energies, MDPI, vol. 15(20), pages 1-14, October.

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