Scholarlink

<p>This article presents a transformerless switched-capacitor (SC)-based five-level (5 L) boost inverter designed for single-phase grid-tied photovoltaic (PV) applications. The proposed topology offers a double voltage boost gain, reducing the need to connect a large number of PV panels in series and thereby minimizing associated issues. By connecting the capacitor and DC source in series, the double voltage gain is achieved using a simple level-shifted pulse-width modulation (LS-PWM) technique. A key advantage of the proposed topology is its use of seven switches, one diode, and two capacitors to generate a 5 L output voltage waveform. Its common-grounding feature eliminates leakage current problems, while the self-balancing capability of the capacitors removes the need for additional sensors. The complete operation of the topology is explained through various modes of operation. A closed-loop control scheme is implemented using a straightforward proportional-resonant (PR) controller. The feasibility of the proposed topology is validated through extensive simulation and experimental results under both steady-state and dynamic loading conditions. Finally, the advantages of the topology are emphasized through a comprehensive comparison with other SC-based 5 L topologies, considering reduced cost, total standing voltage, efficiency, and other parameters.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Single-Phase Common Ground Type Switched Capacitor Based Five-Level Boost Inverter for Grid-Tied PV Applications

  • 期刊论文

  • 发表日期：

    2026年2月20日

查看全文
  • Palakurthi Ravali,
  • Kirubakaran Annamalai

摘要

This article presents a transformerless switched-capacitor (SC)-based five-level (5 L) boost inverter designed for single-phase grid-tied photovoltaic (PV) applications. The proposed topology offers a double voltage boost gain, reducing the need to connect a large number of PV panels in series and thereby minimizing associated issues. By connecting the capacitor and DC source in series, the double voltage gain is achieved using a simple level-shifted pulse-width modulation (LS-PWM) technique. A key advantage of the proposed topology is its use of seven switches, one diode, and two capacitors to generate a 5 L output voltage waveform. Its common-grounding feature eliminates leakage current problems, while the self-balancing capability of the capacitors removes the need for additional sensors. The complete operation of the topology is explained through various modes of operation. A closed-loop control scheme is implemented using a straightforward proportional-resonant (PR) controller. The feasibility of the proposed topology is validated through extensive simulation and experimental results under both steady-state and dynamic loading conditions. Finally, the advantages of the topology are emphasized through a comprehensive comparison with other SC-based 5 L topologies, considering reduced cost, total standing voltage, efficiency, and other parameters.