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Optimal Design of a Flyback Microinverter Operating under Discontinuous-Boundary Conduction Mode (DBCM)

Author

Listed:
  • Georgios Christidis

    (Laboratory of Electromechanical Energy Conversion, Department of Electrical and Computer Engineering, University of Patras, 26504 Patras, Greece)

  • Anastasios Nanakos

    (Laboratory of Electromechanical Energy Conversion, Department of Electrical and Computer Engineering, University of Patras, 26504 Patras, Greece)

  • Emmanuel Tatakis

    (Laboratory of Electromechanical Energy Conversion, Department of Electrical and Computer Engineering, University of Patras, 26504 Patras, Greece)

Abstract

The flyback converter has been widely used in Photovoltaic microinverters, operating either in Discontinuous, Boundary, or Continuous Conduction Mode (DCM, BCM, CCM). The recently proposed hybrid DBCM operation inherits the merits of both DCM and BCM. In this work, the necessary analytical equations describing the converter operation for any given condition under DBCM are derived, and are needed due to the hybrid nature of the modulation strategy during each sinusoidal wave. Based on this analysis, a design optimization sequence used to maximize the weighted efficiency of the inverter under DBCM is then applied. The design procedure is based on a power loss analysis for each converter component and focuses on the appropriate selection of the converter parameters. To achieve this, accurate, fully parameterized loss models of the converter components are implemented. The power loss analysis is then validated by applying the optimization methodology to build an experimental prototype operating in DBCM.

Suggested Citation

  • Georgios Christidis & Anastasios Nanakos & Emmanuel Tatakis, 2021. "Optimal Design of a Flyback Microinverter Operating under Discontinuous-Boundary Conduction Mode (DBCM)," Energies, MDPI, vol. 14(22), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7480-:d:675432
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    Cited by:

    1. Carlos Andres Ramos-Paja & Oscar Danilo Montoya & Luis Fernando Grisales-Noreña, 2022. "Adaptive Sliding-Mode Controller for Flyback-Based PV Systems Featuring Constant Switching Frequency," Mathematics, MDPI, vol. 10(8), pages 1-27, April.

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