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Hybrid Multimodule DC-DC Converters for Ultrafast Electric Vehicle Chargers

Author

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  • Mena ElMenshawy

    (Department of Electrical Engineering, Qatar University, Doha 2713, Qatar)

  • Ahmed Massoud

    (Department of Electrical Engineering, Qatar University, Doha 2713, Qatar)

Abstract

To increase the adoption of electric vehicles (EVs), significant efforts in terms of reducing the charging time are required. Consequently, ultrafast charging (UFC) stations require extensive investigation, particularly considering their higher power level requirements. Accordingly, this paper introduces a hybrid multimodule DC-DC converter-based dual-active bridge (DAB) topology for EV-UFC to achieve high-efficiency and high-power density. The hybrid concept is achieved through employing two different groups of multimodule converters. The first is designed to be in charge of a high fraction of the total required power, operating at a relatively low switching frequency, while the second is designed for a small fraction of the total power, operating at a relatively high switching frequency. To support the power converter controller design, a generalized small-signal model for the hybrid converter is studied. Also, cross feedback output current sharing (CFOCS) control for the hybrid input-series output-parallel (ISOP) converters is examined to ensure uniform power-sharing and ensure the desired fraction of power handled by each multimodule group. The control scheme for a hybrid eight-module ISOP converter of 200 kW is investigated using a reflex charging scheme. The power loss analysis of the hybrid converter is provided and compared to conventional multimodule DC-DC converters. It has been shown that the presented converter can achieve both high efficiency ( 99.6 % ) and high power density (10.3 kW/L), compromising between the two other conventional converters. Simulation results are provided using the MatLab/Simulink software to elucidate the presented concept considering parameter mismatches.

Suggested Citation

  • Mena ElMenshawy & Ahmed Massoud, 2020. "Hybrid Multimodule DC-DC Converters for Ultrafast Electric Vehicle Chargers," Energies, MDPI, vol. 13(18), pages 1-28, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:18:p:4949-:d:416804
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    References listed on IDEAS

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    1. Mena ElMenshawy & Ahmed Massoud, 2020. "Modular Isolated DC-DC Converters for Ultra-Fast EV Chargers: A Generalized Modeling and Control Approach," Energies, MDPI, vol. 13(10), pages 1-34, May.
    2. Xiang Wang & Zhengyou He & Jianwei Yang, 2018. "Electric Vehicle Fast-Charging Station Unified Modeling and Stability Analysis in the dq Frame," Energies, MDPI, vol. 11(5), pages 1-24, May.
    3. Deepak Ronanki & Apoorva Kelkar & Sheldon S. Williamson, 2019. "Extreme Fast Charging Technology—Prospects to Enhance Sustainable Electric Transportation," Energies, MDPI, vol. 12(19), pages 1-17, September.
    4. Zeyan Lv & Yanghong Xia & Junwei Chai & Miao Yu & Wei Wei, 2018. "Distributed Coordination Control Based on State-of-Charge for Bidirectional Power Converters in a Hybrid AC/DC Microgrid," Energies, MDPI, vol. 11(4), pages 1-15, April.
    5. Yixin Zhu & Tao Wang & Liansong Xiong & Gaofeng Zhang & Xin Qian, 2018. "Parallel Control Method Based on the Consensus Algorithm for the Non-Isolated AC/DC Charging Module," Energies, MDPI, vol. 11(10), pages 1-13, October.
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    Cited by:

    1. Mena ElMenshawy & Ahmed Massoud, 2022. "Medium-Voltage DC-DC Converter Topologies for Electric Bus Fast Charging Stations: State-of-the-Art Review," Energies, MDPI, vol. 15(15), pages 1-20, July.
    2. Mostafa Shibl & Loay Ismail & Ahmed Massoud, 2021. "Electric Vehicles Charging Management Using Machine Learning Considering Fast Charging and Vehicle-to-Grid Operation," Energies, MDPI, vol. 14(19), pages 1-22, September.
    3. Adolfo Dannier & Gianluca Brando & Marino Coppola, 2022. "Special Issue on Power Converter of Electric Machines, Renewable Energy Systems, and Transportation," Energies, MDPI, vol. 15(3), pages 1-3, January.

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