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Design and Performance Analysis of New Multilevel Inverter for PV System

Author

Listed:
  • Rabail Memon

    (Department of Electrical Engineering, Mehran University of Engineering & Technology, Jamshoro 76062, Pakistan)

  • Mukhtiar Ahmed Mahar

    (Department of Electrical Engineering, Mehran University of Engineering & Technology, Jamshoro 76062, Pakistan)

  • Abdul Sattar Larik

    (Department of Electrical Engineering, Mehran University of Engineering & Technology, Jamshoro 76062, Pakistan)

  • Syed Asif Ali Shah

    (Department of Electrical Engineering, Mehran University of Engineering & Technology, Jamshoro 76062, Pakistan)

Abstract

Multilevel inverters (MLIs) have recently attracted more attention in medium-voltage and high-power applications as they can provide an effective interface with photovoltaic (PV) systems. Conventional MLIs are used to generate higher voltage levels, which improve power quality and reduce the requirement for passive filters. However, recent research has focused on designing new MLI topologies using reduced switch counts and less voltage stress. This study, as such, proposes a new nine-level symmetric MLI for PV systems with a minimum number of switches. This decrease in the number of switches reduces the voltage stress across the switches and the number of driving circuits, which lowers the complexity of the control circuit and, as a result, lowers the cost and size of the system. This article compares the proposed MLI with other topologies based on the DC sources, switches count, gate driver circuits (N gd ), total standing voltage per unit (TSV PU ), cost function (CF), and components count per level (CC/L). The proposed topology is integrated with the PV system. MATLAB software is used to evaluate the performance of MLI at step change in irradiance and under variable load conditions. The total harmonic distortion (THD) of the proposed topology is reduced with the implementation of phase disposition pulse width modulation (PD-PWM). In addition, PD-PWM is compared with phase opposition disposition pulse width modulation (POD-PWM) and alternative phase opposition disposition pulse width (APOD-PWM) modulation techniques. The simulation results reveal the improved performance of the proposed topology at variable irradiance and under varying load conditions. The comparison results reveal minimum (TSV PU ), CC/L, CF, and switch count compared to existing topologies. Hence, the proposed topology of MLI is cost-effective and superior in all aspects compared to other topologies. In summary, it offers overall improved performance, and thus, it is feasible for the PV system.

Suggested Citation

  • Rabail Memon & Mukhtiar Ahmed Mahar & Abdul Sattar Larik & Syed Asif Ali Shah, 2023. "Design and Performance Analysis of New Multilevel Inverter for PV System," Sustainability, MDPI, vol. 15(13), pages 1-19, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:13:p:10629-:d:1187695
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    References listed on IDEAS

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    1. Ali Bughneda & Mohamed Salem & Anna Richelli & Dahaman Ishak & Salah Alatai, 2021. "Review of Multilevel Inverters for PV Energy System Applications," Energies, MDPI, vol. 14(6), pages 1-23, March.
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    Cited by:

    1. Kalsoom Bano & Ghulam Abbas & Mohammed Hatatah & Ezzeddine Touti & Ahmed Emara & Paolo Mercorelli, 2024. "Phase Shift APOD and POD Control Technique in Multi-Level Inverters to Mitigate Total Harmonic Distortion," Mathematics, MDPI, vol. 12(5), pages 1-26, February.

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