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This study investigates a novel dc-dc converter topology intended to improve grid-connected photovoltaic (GCPV) systems. In this configuration, we combine a Switched-Inductor SEPIC (SL-SEPIC) converter with a three-phase inverter, which is connected to the grid by an LCL filter. In contrast to traditional boost converters, the SL-SEPIC was made to offer high performance and efficiency. We employed Synchronous Reference Frame Phase-Locked Loop (SRF-PLL) block and PQ control within the dq reference frame to control the power injected into the grid. The Perturb and Observe (P&O) technique was used to make sure the PV system ran at maximum power. This control is used in conjunction with a boost converter to compare the SL-SEPIC's performance. According to the results, the SL-SEPIC performed better than the boost converter in a variety of scenarios, exhibiting excellent efficiency and a low THD. The benefits of using a switched-inductor SEPIC converter in these applications are illustrated in this paper.

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Integration of Switched-Inductor SEPIC Converter in Double-Stage Three-Phase PV System to Enhance the Grid Connection Performances

  • 会议论文

  • 发表日期：

    2025年

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  • Farid Oufqir,
  • Mohamed Bendaoud,
  • Fatima Ezzahra Tahiri,
  • Sara Elbadaoui,
  • Khalid Chikh

摘要

This study investigates a novel dc-dc converter topology intended to improve grid-connected photovoltaic (GCPV) systems. In this configuration, we combine a Switched-Inductor SEPIC (SL-SEPIC) converter with a three-phase inverter, which is connected to the grid by an LCL filter. In contrast to traditional boost converters, the SL-SEPIC was made to offer high performance and efficiency. We employed Synchronous Reference Frame Phase-Locked Loop (SRF-PLL) block and PQ control within the dq reference frame to control the power injected into the grid. The Perturb and Observe (P&O) technique was used to make sure the PV system ran at maximum power. This control is used in conjunction with a boost converter to compare the SL-SEPIC's performance. According to the results, the SL-SEPIC performed better than the boost converter in a variety of scenarios, exhibiting excellent efficiency and a low THD. The benefits of using a switched-inductor SEPIC converter in these applications are illustrated in this paper.