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Design and Analysis of a Triple-Input Three-Level PV Inverter with Minimized Number of MPPT Controllers

Author

Listed:
  • Bikash Gyawali

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Rukhsar

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Aidha Muhammad Ajmal

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

  • Yongheng Yang

    (College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract

Photovoltaic (PV) energy has been a preferable choice with the rise in global energy demand, as it is a sustainable, efficient, and cost-effective source of energy. Optimizing the power generation is necessary to fully utilize the PV system. Harvesting more power uses cascading of impedance source converters taking input from low-voltage PV arrays which requires multiple maximum power point tracking (MPPT) controllers. To solve this problem, a three-level inverter topology with a proposed PV arrangement, offering higher voltage boosting and a smaller size with a lower cost suitable for low-voltage panels, is designed in this article. The design criteria for parameters are discussed with the help of the small signal analysis. In this paper, three PV arrays are used to harvest maximum energy, which require only one MPPT controller and employ an extended perturb and observe (P&O) algorithm, being faster, highly efficient, and reducing the computational burden of the controller. Moreover, a three maximum power points tracker algorithm, which perturbs one parameter and observes six variables, is designed for the selected converter topology. Finally, the designed 1.1 kVA grid-connected PV system was simulated in MATLAB (R2023a) which shows that the MPPT algorithm offers better dynamics and is highly efficient with a conversion efficiency of 99.2% during uniform irradiance and 97% efficiency during variable irradiance conditions.

Suggested Citation

  • Bikash Gyawali & Rukhsar & Aidha Muhammad Ajmal & Yongheng Yang, 2024. "Design and Analysis of a Triple-Input Three-Level PV Inverter with Minimized Number of MPPT Controllers," Energies, MDPI, vol. 17(21), pages 1-17, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:21:p:5380-:d:1509288
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    References listed on IDEAS

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    1. Zeb, Kamran & Uddin, Waqar & Khan, Muhammad Adil & Ali, Zunaib & Ali, Muhammad Umair & Christofides, Nicholas & Kim, H.J., 2018. "A comprehensive review on inverter topologies and control strategies for grid connected photovoltaic system," Renewable and Sustainable Energy Reviews, Elsevier, vol. 94(C), pages 1120-1141.
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