Operation and Control of a Quasi Z-source Converter in a Renewable Hybrid Microgrid

Authors

  • Paul N. Timo Author
  • Tamer F. Megahed Author
  • Masahito Shoyama Author
  • Sobhy M. Abdelkader Author

DOI:

https://doi.org/10.24084/repqj20.379

Keywords:

Hybrid microgrid, quasi-Z-source, interlinking converter, renewable energy sources, photovoltaic, wind

Abstract

The power sharing need and operational reliability of a renewable hybrid microgrid are addressed in this study. A hybrid microgrid allows for the flexible incorporation of renewable energy sources, overcoming the limitations of AC and DC microgrids in terms of conversion losses and efficiency. To ensure optimal system performance, an interlinking converter (IC) is necessary for the seamless transmission of electric power between the two subgrids while keeping a stable DC bus voltage and appropriate AC sub-grid frequency. In this study, a Quasi Z source converter (qZSC) with integrated boost capability is introduced as an IC in a PV-Wind based hybrid microgrid. Also, an adaptive dual loop based-PI (ADL-PI) control is proposed which maintains a constant peak DC-link voltage and supports maximum power point tracking while improving the system's overall stability. The proposed system and control approach are assessed using MATLAB/Simulink, and the results indicate its efficacy under various scenarios.

Author Biographies

  • Paul N. Timo

    Electrical Power Engineering Department, Egypt-Japan University of Science and Technology (E-JUST), Egypt

  • Tamer F. Megahed

    Electrical Power Engineering Department, Egypt-Japan University of Science and Technology (E-JUST), Egypt

    Electrical Engineering Department, Mansoura University, Egypt  

  • Masahito Shoyama

    Electrical Engineering Department, Kyushu University, Japan

  • Sobhy M. Abdelkader

    Electrical Power Engineering Department, Egypt-Japan University of Science and Technology (E-JUST), Egypt

    Electrical Engineering Department, Mansoura University, Egypt

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Published

2024-01-03

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Section

Articles