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<p>In this study, a novel multi-port bi-directional converter is proposed to be utilized as an off-board EV charging station. Four modes of operation, high gain, and three input/output ports are the main advantages of the proposed converter. The converter supports Grid-to-Vehicle (G2V), PV-to-Vehicle (PV2V), Vehicle-to-Grid (V2G), and PV-to-Grid (PV2G) modes. Theoretical analysis is conducted in continuous current mode. Converter parameter values are selected based on theoretical analysis to maximize performance and efficiency. Simulation results are compared to theoretical analysis in order to validate their accuracy. A prototype is implemented and tested for all four modes of operation. As the input voltage is 58.5&#xa0;V, the output voltage is measured to be 14.5&#xa0;V in G2V and PV2V. However, the output voltage is 219&#xa0;V in V2G, and for the last mode, PV2G, the output voltage is 108&#xa0;V. The maximum efficiency is calculated to be 96% in PV2V and G2V, 95% for V2G mode, and 94% for PV2G mode. Compared to the latest converters, the proposed converter has a higher number of ports, a higher number of operating modes, and also higher efficiency. In addition, small-signal analysis and transient simulations are performed to verify the stability and dynamic performance of the converter. The practical results are benchmarked against recent SiC and GaN based converters achieving higher efficiencies, highlighting that while such devices offer slightly higher performance, they involve greater cost and complexity compared to the proposed solution.</p>

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A Novel Multi-Port Bi-Directional Converter for Renewable Energy Integration in EV Off-Board Charging Stations

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Hazem H. Mostafa,
  • Amr M. Ibrahim,
  • Fathy Z. Amer,
  • Eman F. Sawires

摘要

In this study, a novel multi-port bi-directional converter is proposed to be utilized as an off-board EV charging station. Four modes of operation, high gain, and three input/output ports are the main advantages of the proposed converter. The converter supports Grid-to-Vehicle (G2V), PV-to-Vehicle (PV2V), Vehicle-to-Grid (V2G), and PV-to-Grid (PV2G) modes. Theoretical analysis is conducted in continuous current mode. Converter parameter values are selected based on theoretical analysis to maximize performance and efficiency. Simulation results are compared to theoretical analysis in order to validate their accuracy. A prototype is implemented and tested for all four modes of operation. As the input voltage is 58.5 V, the output voltage is measured to be 14.5 V in G2V and PV2V. However, the output voltage is 219 V in V2G, and for the last mode, PV2G, the output voltage is 108 V. The maximum efficiency is calculated to be 96% in PV2V and G2V, 95% for V2G mode, and 94% for PV2G mode. Compared to the latest converters, the proposed converter has a higher number of ports, a higher number of operating modes, and also higher efficiency. In addition, small-signal analysis and transient simulations are performed to verify the stability and dynamic performance of the converter. The practical results are benchmarked against recent SiC and GaN based converters achieving higher efficiencies, highlighting that while such devices offer slightly higher performance, they involve greater cost and complexity compared to the proposed solution.