CJEE

Chinese Journal of Electrical Engineering ›› 2023, Vol. 9 ›› Issue (4): 132-143.doi: 10.23919/CJEE.2023.000027

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Power Quality Improvement and Signal Conditioning of PV Array and Grid Interfaced Off-board Charger for Electric Vehicles with V2G and G2V Capabilities*

Shailendra Kumar1,*, Tapesh Upadhyay2, Om Hari Gupta3   

  1. 1. Department of Electrical Engineering, Indian Institute of Technology, Bhilai 492015, India;
    2. Department of Electrical Engineering, Maulana Azad National Institute of Technology (MANIT), Bhopal 462003, India;
    3. Department of Electrical Engineering, National Institute of Technology, Jamshedpur 831014, India
  • Received:2022-11-22 Revised:2022-12-31 Accepted:2023-06-07 Published:2024-01-08
  • Contact: *E-mail: shailendraiitbh@gmail.com
  • About author:Shailendra Kumar (Senior Member, IEEE) is currently working as an Assistant Professor in the Department of Electrical Engineering, Indian Institute of Technology (IIT) Bhilai. He received B.Tech. degree in Electrical and Electronics Engineering from Uttar Pradesh Technical University, Lucknow, India, in 2010, and the M.Tech. Degree in Power Electronics, Electrical Machine and Drives (PEEMD) from the Indian Institute of Technology, Delhi, India, in 2015. He has completed his Ph.D. degree in Department of Electrical Engineering from the Indian Institute of Technology, Delhi, New Delhi, India on May 2019. He has worked as a Postdoctoral Research Fellow at Petroleum Institute of Research Centre Khalifa University from May 2019 to November 2019. He has also worked as an Assistant Professor at Maulana Azad National Institute of Technology, Bhopal from June 2020 to May 2023. His research interests include charging stations for EVs, power quality, grid integration of renewable energy resources, custom power devices, and microgrid. Dr. Kumar is recipient of prestigious POSOCO power system award (in Master as well as in Doctoral categories) in 2016 and 2019. He is also a recipient of Prof. Som Nath Mahendra Student Travel Awards for the IEEE PEDES 2018 conference and the IEEE UPCON Best Paper Award in 2016 and 2018. Dr. Kumar is a Senior Member of IEEE and member of INAE Societies.
    Tapesh Upadhyay was born in Damoh (M.P.), India in 1997. He received his B.Tech. degree in Electrical Engineering from Jabalpur Engineering College, Jabalpur, India in 2021 and M.Tech. degree in Electrical Drives from Maulana Azad National Institute of Technology in 2023. His research areaes include design and modelling of EV charging stations. Presently, he is working in IDAM Infrastructure Pvt. Limited as an Analyst, where work is based on analysis of different renewable energy systems.
    Om Hari Gupta (Senior Member, IEEE) is currently an Assistant Professor at the Department of Electrical Engineering, National Institute of Technology Jamshedpur, India. He received B.Tech. degree (Electrical & Electronics Engineering) from UP Technical University, Lucknow, India, M.Tech. degree (Power Electronics & ASIC Design) from the MN National Institute of Technology Allahabad, Prayagraj, India, and Ph.D. degree (Electrical Engineering) from the Indian Institute of Technology Roorkee, Roorkee, India. He is a recipient of the Canadian Queen Elizabeth II Diamond Jubilee Scholarship for research visiting the University of Ontario Institute of Technology, Oshawa, ON, Canada in 2017. His major areas of research interests include power system protection, microgrid, renewable-based distributed generation, and electric power quality. Dr. Gupta is a Senior Member of IEEE and a Reviewer for various international journals including IEEE Transactions on Power Delivery, Electric Power Components and Systems, International Journal of Electrical Power and Energy Systems, etc.
  • Supported by:
    * MPCST and SERB, India, for supporting through start-up research grant (SRG/2020/001742).

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Abstract: In this work, we present a photovoltaic (PV)-based off-board charging system integrated with the grid using a voltage source converter (VSC). The control of the grid-tied off-board charger is derived from the joint logarithmic hyperbolic cosine robust sparse adaptive filter (JLHCAF) algorithm. This algorithm effectively tracks the fundamental component of the load current in a short duration, providing a good dynamic response. Due to its robustness against impulsive interference, the JLHCAF outperforms other sparsity-aware robust algorithms The cascaded proportional-integral (PI) controller is used to control the bidirectional buck-boost converter for electric vehicle (EV) charging/discharging, which acts in buck operation if the EV is being charged and in boost operation if it is discharged. The reference DC link voltage for the controller is derived by using adaptive MPPT technique. The bidirectional properties of the system enable various functions, including grid-to-vehicle (G2V), vehicle-to-grid (V2G), PV source-to-grid (PV2G), vehicle-to-home (V2H), and PV source-to-vehicle (PV2V) operations. Additionally, the system can supply power to critical nonlinear loads. The control strategy ensures compliance with the power quality requirements set by the IEEE standard, as demonstrated in the results. To validate the effectiveness of the proposed system, we conducted tests under dynamic conditions by disconnecting and reconnecting household loads. Furthermore, the off-board charging system was subjected to actual conditions, such as variations in solar PV insolation, and its steady-state performance was evaluated through simulation and laboratory experimental prototypes. The results, including total harmonic distortion (THD), support the validation of the developed charging system.

Key words: Grid to vehicle (G2V), vehicle to grid (V2G), off-board charger (OBC), power quality, total harmonic distortion (THD), electrical vehicles (EVs)