Implementation and Control of Multiport Grid Integrated Hybrid Energy Interface for EV Charging Application

Abstract

EV charging combined with distributed energy storage (ES) devices could be utilized to send power to the grid during peak hours, mitigating the effects of load shedding. In order to achieve these goals, a hybrid multi-port charging system is developed in this study to properly manage power flows and balance energy. It is made up of a PFC bridge rectifier that is linked to an isolated three-port dc-dc converter that includes a series resonant (SRC) and a DAB converter for fast and slow charging applications, respectively. To maximize efficiency and power density, the ports share a 400 V common DC link. Grid-to-vehicle (G2V) mode is used to charge EV and ES vehicles from the utility grid; PV-to-grid (PV2G) mode is used to deliver PV energy to the grid; renewable-to-vehicle (R2V) mode is used to charge EV and ES batteries; and vehicle-to-grid (V2G) mode is used by EV and ES to deliver stored energy to the grid. The charging system’s performance and operation are validated in real time using MATLAB/Simulink under various operating situations. The system’s total harmonic distortion (THD) for the supply current is 2.07%. The suggested system is also compared against a state-of-the-art multiport charging system to assess its performance.

Keywords:

• Bidirectional power flow
• charging station
• electric vehicle (EV)
• energy storage (ES)
• PV array
• vehicle-to-grid (V2G)

Credit Authorship Contribution Statement

Prachi Agarwal: Conceptualization, Methodology, Investigation, Writing – original draft. Lalit Kumar Sahu: Methodology, Investigation, Supervision. Akhilesh Kumar Tiwari: Methodology, Investigation, Writing – review & editing.

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Prachi Agrawal

Prachi Agrawal, a Bilaspur native, holds a BTech in Electrical Engineering (2016–2020) from CSVTU and an MTech in Power System and Control (2021–2023) from NIT Raipur. She is currently employed at Mercedes-Benz Research and Development in Bangalore as a PGET. Her passion lies in power electronics converters and EV charging systems.

Lalit Kumar Sahu

Lalit Kumar Sahu was born in Bhilai, India. He received the B.E. degree in Electrical Engineering from the Madhya Pradesh Christian College of Engineering and Technology, Bhilai, and the M.Tech. degree in electrical drives from the Maulana Azad National Institute of Technology (M.A.N.I.T), Bhopal, India, in 2008 and 2010, respectively. He received the Ph.D. degree from M.A.N.I.T. Bhopal. He is also working as an Assistant Professor at the Department of Electrical Engineering, N.I.T. Raipur, India. His research interests include power electronic converters and hybrid electric vehicular systems.

Akhilesh Kumar Tiwari

Akhilesh Kumar Tiwari was born in Bhilai, India. He received B.E. in Electrical and Electronics Engineering and M.Tech. in Power Electronics from CSVTU, Bhilai in 2012 and 2016, respectively. Currently, he is pursuing his Ph.D. from the Department of Electrical Engineering, N.I.T. Raipur, Chhattisgarh, India. His research interest focuses on power electronic converters, EV charging infrastructure.