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Review, analysis and improving the utilization factor of a PV-grid connected system via HERIC transformerless approach

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  • Zaid, S.A.
  • Kassem, Ahmed M.

Abstract

This paper proposed an improved Highly Efficient and Reliable Inverter Concept (HERIC) inverter with photovoltaic (PV)-grid connected power system. However, transformerless inverter based on HERIC topology is considered as one of the most reliable, efficient, and approximately leakage free inverters with the PV-grid connected systems. The main drawback of this inverter is drawing a discontinuous current from the photovoltaic generating unit. Also, continuous photovoltaic current is needed to guarantee the maximum power point tracking (MPPT) operation. Subsequently, the operation of the HERIC inverter at maximum power point tracking condition is not a clear issue. Therefore, the PV utilization factor (Kuf) value falls down to about 50%, which leads to increasing in the cost and size of the photovoltaic generator unit. In this study, derivation of the utilization factor based on the PV-grid connected through HERIC inverter analyses are presented. Also, an improved version of the HERIC inverter is introduced to remove the previous drawbacks. To validate the analysis and idea, digital simulation results are carried out for both the proposed and classical PV-grid via HERIC inverter system. The transient response of the proposed grid current controller, proportion resonance (PR) controller, is tested. The effects of parameters uncertainties on the system performance factors are also studied to validate the robustness of the control approach.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:rensus:v:73:y:2017:i:c:p:1061-1069
    DOI: 10.1016/j.rser.2017.02.025
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    References listed on IDEAS

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    1. 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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    1. Rehman, Shafiqur & Ahmed, M.A. & Mohamed, Mohand H. & Al-Sulaiman, Fahad A., 2017. "Feasibility study of the grid connected 10MW installed capacity PV power plants in Saudi Arabia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 80(C), pages 319-329.
    2. Hoseinzadeh, Siamak & Astiaso Garcia, Davide & Huang, Lizhen, 2023. "Grid-connected renewable energy systems flexibility in Norway islands’ Decarbonization," Renewable and Sustainable Energy Reviews, Elsevier, vol. 185(C).
    3. Lin He & Chang-Ling Li & Qing-Yun Nie & Yan Men & Hai Shao & Jiang Zhu, 2017. "Core Abilities Evaluation Index System Exploration and Empirical Study on Distributed PV-Generation Projects," Energies, MDPI, vol. 10(12), pages 1-18, December.
    4. 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.

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