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A Generalized Approach for Determining the Current Ripple RMS in Four-Leg Inverters with the Neutral Inductor

Author

Listed:
  • Riccardo Mandrioli

    (Department of Electrical, Electronic, and Information Engineering, University of Bologna, 40136 Bologna, Italy)

  • Francesco Lo Franco

    (Department of Electrical, Electronic, and Information Engineering, University of Bologna, 40136 Bologna, Italy)

  • Mattia Ricco

    (Department of Electrical, Electronic, and Information Engineering, University of Bologna, 40136 Bologna, Italy)

  • Gabriele Grandi

    (Department of Electrical, Electronic, and Information Engineering, University of Bologna, 40136 Bologna, Italy)

Abstract

This manuscript proposes a novel approach for determining phase and neutral-current-ripple RMS in grid-connected four-leg inverters with the neutral inductor. The harmonic pollution is determined for any arbitrary pulse width modulation (PWM) technique and a generic value of the neutral inductor. Thanks to the proposed approach, it is possible to describe the neutral inductor in a parametric way with respect to phase inductors and obtain a wide range of results, ranging from a direct neutral connection (no neutral inductor) to a conventional three-phase inverter (no fourth wire) for any value of modulation index and common mode injection. The results permit one to compare different design choices in multiple scenarios effectively. The findings were validated by numerical simulations and experimental tests employing the most popular PWM techniques, such as space vector PWM (SVPWM) and discontinuous PWM (DPWM).

Suggested Citation

  • Riccardo Mandrioli & Francesco Lo Franco & Mattia Ricco & Gabriele Grandi, 2023. "A Generalized Approach for Determining the Current Ripple RMS in Four-Leg Inverters with the Neutral Inductor," Energies, MDPI, vol. 16(4), pages 1-19, February.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:4:p:1710-:d:1062272
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    References listed on IDEAS

    as
    1. George R. G. Clarke, 2019. "From the Editor," The International Trade Journal, Taylor & Francis Journals, vol. 33(6), pages 493-494, November.
    2. Faraji, Hossien & Nosratabadi, Seyyed Mostafa & Hemmati, Reza, 2022. "AC unbalanced and DC load management in multi-bus residential microgrid integrated with hybrid capacity resources," Energy, Elsevier, vol. 252(C).
    3. George R. G. Clarke, 2019. "From the Editor," The International Trade Journal, Taylor & Francis Journals, vol. 33(5), pages 383-384, September.
    4. George R.G. Clarke, 2019. "From the editor," The International Trade Journal, Taylor & Francis Journals, vol. 33(1), pages 1-4, January.
    5. Rafi, Fida Hasan Md & Hossain, M.J. & Rahman, Md Shamiur & Taghizadeh, Seyedfoad, 2020. "An overview of unbalance compensation techniques using power electronic converters for active distribution systems with renewable generation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 125(C).
    6. George R. G. Clarke, 2019. "From the Editor," The International Trade Journal, Taylor & Francis Journals, vol. 33(4), pages 303-304, July.
    7. Riccardo Mandrioli & Aleksandr Viatkin & Manel Hammami & Mattia Ricco & Gabriele Grandi, 2020. "A Comprehensive AC Current Ripple Analysis and Performance Enhancement via Discontinuous PWM in Three-Phase Four-Leg Grid-Connected Inverters," Energies, MDPI, vol. 13(17), pages 1-32, August.
    8. George R. G. Clarke, 2019. "From the Editor," The International Trade Journal, Taylor & Francis Journals, vol. 33(3), pages 219-220, May.
    9. George R. G. Clarke, 2019. "From the editor," The International Trade Journal, Taylor & Francis Journals, vol. 33(2), pages 137-138, March.
    10. Aleksandr Viatkin & Riccardo Mandrioli & Manel Hammami & Mattia Ricco & Gabriele Grandi, 2021. "AC Current Ripple in Three-Phase Four-Leg PWM Converters with Neutral Line Inductor," Energies, MDPI, vol. 14(5), pages 1-31, March.
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