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An H5 Transformerless Inverter for Grid Connected PV Systems with Improved Utilization Factor and a Simple Maximum Power Point Algorithm

Author

Listed:
  • Hani Albalawi

    (Department of Electrical Engineering, Faculty of Engineering, University of Tabuk, Tabuk 47913, Saudi Arabia)

  • Sherif Ahmed Zaid

    (Department of Electrical Power, Faculty of Engineering, Cairo University, Cairo 12613, Egypt)

Abstract

Due to their small size, minimum cost, and great efficiency, photovoltaic (PV) grid-connected transformerless inverters have been developed and become famous around the world in distributed PV generators systems. One of the most efficient topologies of the transformerless inverter family is H5 topology. This inverter extracts a discontinuous current from the PV panel, which conflicts with the operation at maximum power point tracking (MPPT) conditions while the utilization factor of the PV degrades. This paper proposes improved H5 topology featuring a boost converter inserted in the middle between the PV panels and the H5 inverter. The design of the boost converter is planned to operate at continuous conduction mode to guarantee MPPT conditions of the PV. A new and simple off line MPPT algorithm is introduced and performance factors like efficiency and utilization factors of the proposed and convention H5 topology are compared. The simulation results indicate that the proposed system provides a preferable utilization factor and a simpler MPPT algorithm.

Suggested Citation

  • Hani Albalawi & Sherif Ahmed Zaid, 2018. "An H5 Transformerless Inverter for Grid Connected PV Systems with Improved Utilization Factor and a Simple Maximum Power Point Algorithm," Energies, MDPI, vol. 11(11), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:2912-:d:178342
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    References listed on IDEAS

    as
    1. Zaid, S.A. & Kassem, Ahmed M., 2017. "Review, analysis and improving the utilization factor of a PV-grid connected system via HERIC transformerless approach," Renewable and Sustainable Energy Reviews, Elsevier, vol. 73(C), pages 1061-1069.
    2. Majid Mehrasa & Edris Pouresmaeil & Bahram Pournazarian & Amir Sepehr & Mousa Marzband & João P. S. Catalão, 2018. "Synchronous Resonant Control Technique to Address Power Grid Instability Problems Due to High Renewables Penetration," Energies, MDPI, vol. 11(9), pages 1-18, September.
    3. Ningyun Zhang & Houjun Tang & Chen Yao, 2014. "A Systematic Method for Designing a PR Controller and Active Damping of the LCL Filter for Single-Phase Grid-Connected PV Inverters," Energies, MDPI, vol. 7(6), pages 1-21, June.
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    Cited by:

    1. Mohamed Derbeli & Cristian Napole & Oscar Barambones & Jesus Sanchez & Isidro Calvo & Pablo Fernández-Bustamante, 2021. "Maximum Power Point Tracking Techniques for Photovoltaic Panel: A Review and Experimental Applications," Energies, MDPI, vol. 14(22), pages 1-31, November.
    2. Jack Flicker & Jay Johnson & Peter Hacke & Ramanathan Thiagarajan, 2022. "Automating Component-Level Stress Measurements for Inverter Reliability Estimation," Energies, MDPI, vol. 15(13), pages 1-15, July.
    3. P. Madasamy & V. Suresh Kumar & P. Sanjeevikumar & Jens Bo Holm-Nielsen & Eklas Hosain & C. Bharatiraja, 2019. "A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation," Energies, MDPI, vol. 12(12), pages 1-25, June.
    4. Aditi Atul Desai & Suresh Mikkili & Tomonobu Senjyu, 2022. "Novel H6 Transformerless Inverter for Grid Connected Photovoltaic System to Reduce the Conduction Loss and Enhance Efficiency," Energies, MDPI, vol. 15(10), pages 1-22, May.

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    More about this item

    Keywords

    PV panel; H5 inverter; boost converter; MPPT; utility grid; utilization factor;
    All these keywords.

    JEL classification:

    • H5 - Public Economics - - National Government Expenditures and Related Policies

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