DESIGN AND IMPLEMENTATION OF SIMULTANEOUS AC–DC CHARGING SYSTEM FOR ELECTRIC VEHICLES

Paper ID: EIJTEM_2025_12_4_73-80

Author's Name: Adduri Akshaya, Dr. K. Srinivas

Volume: 12

Issue: 4

Year: 2025

Page No: 73-80

Abstract:

As electric vehicles (EVs) become more prevalent, reducing charging time while enhancing system flexibility has become a key focus in charging infrastructure design. This paper presents a simultaneous AC and DC charging scheme that allows electric vehicles to draw power from both the grid and a secondary DC source—such as solar photovoltaic (PV) systems, battery energy storage (BES), or vehicle-to-vehicle (V2V) sources—through a unified system architecture. The proposed design integrates a Type-1 onboard AC charger with a bidirectional DC/DC converter, enabling concurrent energy delivery from both ports without interrupting the conventional AC charging process. The AC charging path employs a bridgeless power factor correction (PFC) converter followed by a dual active bridge (DAB) converter for galvanic isolation and power transfer. The DC charging interface operates in bidirectional boost mode to manage DC power exchange. A detailed dynamic model is developed, and control strategies for both charging paths are implemented. A key improvement in this work is the replacement of the previously proposed artificial neural network (ANN) controller with a proportional–integral (PI) controller for regulating the DC-link voltage. This replacement improves the system’s transient performance by achieving a faster and more stable step response. Simulation results using MATLAB/Simulink confirm effective simultaneous charging, improved step response, low total harmonic distortion (THD) on the grid side, and near-unity power factor. The proposed system demonstrates a practical, efficient, and scalable solution for next-generation EV charging stations, especially those that aim to incorporate renewable DC sources for faster and more flexible charging.

Keywords: Simultaneous AC/DC Charging, Electric Vehicle (EV), Bidirectional DC/DC Converter, DC-Link Voltage Control ,PI Controller, Power Factor Correction, Step Response Improvement

References:

[1] ISO 15118, Road vehicles – Vehicle to grid communication interface, ISO, 2020.
[2] IEC 62196, Electric vehicle conductive charging system – Part 1, IEC, 2022.
[3] SAE J1772, Conductive EV Charging Coupler, SAE, 2010.
[4] “GB/T Charging Standard,” Wikipedia, Sep. 2023.
[5] H. Park, M. Kim, and J. H. Jung, “Bidirectional current fed resonant converter,” IEEE Trans. Energy Convers., vol. 36, pp. 3167–3177, 2021.
[6] B. S. Umesh, V. Khadkikar, and H. Zeineldin, “A combinatory AC and DC charging approach for EVs,” IEEE Trans. Intell. Transp. Syst., 2024.
[7] S. S. Acharige et al., “Review of EV charging technologies, architectures,” arXiv, 2022.
[8] B. Kumar and B. Jyothi, “Literature review on bidirectional DC DC converters for EV charging,” SPACES Conf., 2024.
[9] X. Le Huy Nguyen et al., “Multiport bidirectional DC-DC converter for EV/FCV,” arXiv, 2022.
[10] A. Zentani et al., “Developments in EV fast charging technology: A comprehensive review,” IEEE, 2024.
[11] L. Shu et al., “Improved control strategy of triple voltage three phase DAB,” IEEE J. Emerg. Sel. Top. Power Electron., vol. 10, pp. 773–784, 2021.
[12] A. Chen et al., “Dynamic modeling and control of DAB converters for EV charging,” Energies, 2023.
[13] S. Serhan and E. Ahmed, “Effect of charging techniques on battery lifetime: Review,” Proc. ITCE, 2018.
[14] P. Khasa and R. D. K. Jain, “Simultaneous charging/discharging integrative EV for V2G/G2V,” IICPE, 2016.
[15] Research on PI controlled bidirectional DC-DC converter for regenerative braking, IRO Journals, 2023.
[16] S. G. Acharige et al., “EV charging infrastructures and architectures review,” arXiv, 2022.
[17] Neural network based bidirectional converter control, EAI Conf., 2023.
[18] Bidirectional energy management in EV chargers, EPJ Conf., 2025.
[19] Nature Sci. Rep., “Isolated high-efficiency DC-DC charging transformer,” 2025.
[20] Narasipuram & Mopidevi, “Dual primary side FB DC–DC converter for EV charging,” IEEE IICPE, 2023.
[21] S. Meyer and J. Wang, “Integrating ultra-fast charging stations in smart grids,” arXiv, 2018.
[22] MDPI Sustainability, “Isolated DC-DC converters for simultaneous EV charging,” 2023.
[23] X. Zhou et al., “Grid interaction of hybrid AC/DC EV charging,” Frontiers Energy Res., 2022.
[24] Combined AC and DC charger system with neutral-based drivetrain port, IEEE TITS, 2024.
[25] Springer article on V2G bidirectional EV charger topologies and control, 2024.
[26] Combined Charging System connector architecture review, Elsevier, 2022.
[27] Renewable integration and EV charging energy management, Sci. Direct, 2024.
[28] Hybrid charging systems with microgrids, Delft Review, 2020.
[29] AC and DC based on/off-grid charging system review, MDPI, 2022.
[30] Hybrid architecture for EV, PV, and grid integration, TUDelft Report, 2021.
[31] M. A. Hossain Lipu, et al., "ANN-Based Intelligent Control Scheme for Battery Management in EV Charging Systems," IEEE Transactions on Smart Grid, vol. 12, no. 1, pp. 101–112, Jan. 2021.
[32] Y. Zhang and J. Wang, "Neural Network-Based Control for DC–DC Converters in EV Applications," IEEE Transactions on Vehicular Technology, vol. 67, no. 2, pp. 1124–1133, Feb. 2018.
[33] S. J. Lee, et al., "Comparative Analysis of ANN and Classical PI Controllers for Onboard EV Charging Systems," IEEE Access, vol. 9, pp. 14237–14247, 2021.

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