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This paper introduces an innovative single-phase, single-stage transformerless photovoltaic (PV) inverter design that utilizes a multilevel architecture to enhance performance in grid-connected systems. The proposed five-level inverter topology achieves multiple output voltage levels from a single PV source, significantly boosting the output voltage. This design not only supports both buck and boost modes, enabling the inverter to produce output voltages that match or exceed the input PV voltage, but also minimizes leakage current while reducing common-mode voltage transitions. The multilevel structure provides improved voltage quality, reduced harmonic distortion, and enhanced overall efficiency. The effectiveness and safety of the inverter are demonstrated through simulation results, confirming its potential to optimize PV system performance.

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Single-Phase Multilevel Inverter with Switched Capacitor Topology for Leakage Current and Common Mode Voltage Reduction

  • 会议论文

  • 发表日期：

    2026年

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  • Banovat Shanthi,
  • Amit Kumar Singh,
  • Sonti Venu,
  • Sachin Jain

摘要

This paper introduces an innovative single-phase, single-stage transformerless photovoltaic (PV) inverter design that utilizes a multilevel architecture to enhance performance in grid-connected systems. The proposed five-level inverter topology achieves multiple output voltage levels from a single PV source, significantly boosting the output voltage. This design not only supports both buck and boost modes, enabling the inverter to produce output voltages that match or exceed the input PV voltage, but also minimizes leakage current while reducing common-mode voltage transitions. The multilevel structure provides improved voltage quality, reduced harmonic distortion, and enhanced overall efficiency. The effectiveness and safety of the inverter are demonstrated through simulation results, confirming its potential to optimize PV system performance.