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<p>Multiport converters are widely used in fields, such as photovoltaic power generation and smart grids. Traditional multi-port converters have several energy storage inductors, which increase size and cost. Additionally, the energy storage capacitors in these converters are affected by environmental temperature variations, leading to lower converter reliability and efficiency. To address these issues, this paper proposes a multi-port converter based on a single energy storage inductor, which reduces both the energy storage inductor and capacitor while ensuring normal power transmission. This design enhances system stability and reliability. Meanwhile, the LC filter parameters of the multi-port converter are designed, and its control strategy is analyzed. A peak current control method is adopted, where the given current for inductor charging is determined by the output. The proposed converter can achieve three different power flows: DC–DC, DC–AC, and DC-(AC + DC). Simulations conducted in MATLAB/Simulink show that the proposed converter provides both buck and boost functionality, achieving a maximum efficiency of 97%. It supports a 150V DC input and provides both a 50V–250V DC and a 220V, 50Hz AC output, achieving a voltage gain range of 0.33–1.67. It can be widely applied in renewable energy systems and electric vehicles.</p>

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Single energy storage inductor-based multi-port converter design

  • 期刊论文

  • 发表日期：

    2025年6月26日

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  • Yuepeng Chen,
  • Aocheng Tian,
  • Feiyang Wu,
  • Jin Zhu,
  • Hongshu Wang,
  • Xu Yang

摘要

Multiport converters are widely used in fields, such as photovoltaic power generation and smart grids. Traditional multi-port converters have several energy storage inductors, which increase size and cost. Additionally, the energy storage capacitors in these converters are affected by environmental temperature variations, leading to lower converter reliability and efficiency. To address these issues, this paper proposes a multi-port converter based on a single energy storage inductor, which reduces both the energy storage inductor and capacitor while ensuring normal power transmission. This design enhances system stability and reliability. Meanwhile, the LC filter parameters of the multi-port converter are designed, and its control strategy is analyzed. A peak current control method is adopted, where the given current for inductor charging is determined by the output. The proposed converter can achieve three different power flows: DC–DC, DC–AC, and DC-(AC + DC). Simulations conducted in MATLAB/Simulink show that the proposed converter provides both buck and boost functionality, achieving a maximum efficiency of 97%. It supports a 150V DC input and provides both a 50V–250V DC and a 220V, 50Hz AC output, achieving a voltage gain range of 0.33–1.67. It can be widely applied in renewable energy systems and electric vehicles.