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Grid-Connected Inverter for a PV-Powered Electric Vehicle Charging Station to Enhance the Stability of a Microgrid

Author

Listed:
  • Yohan Jang

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

  • Zhuoya Sun

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

  • Sanghyuk Ji

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

  • Chaeeun Lee

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

  • Daeung Jeong

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

  • Seunghoon Choung

    (Department of Electrical & Electronic Engineering, Yonam Institute of Technology, Jinju 52821, Korea)

  • Sungwoo Bae

    (Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea)

Abstract

This study proposes a grid-connected inverter for photovoltaic (PV)-powered electric vehicle (EV) charging stations. The significant function of the proposed inverter is to enhance the stability of a microgrid. The proposed inverter can stabilize its grid voltage and frequency by supplying or absorbing active or reactive power to or from a microgrid using EVs and PV generation. Moreover, the proposed inverter can automatically detect an abnormal condition of the grid, such as a blackout, and operate in the islanding mode, which can provide continuous power to local loads using EV vehicle-to-grid service and PV generation. These inverter functions can satisfy the requirements of the grid codes, such as IEEE Standard 1547–2018 and UL 1741 SA. In addition, the proposed inverter can not only enhance the microgrid stability but also charge EVs in an appropriate mode according to the condition of the PV array and EVs. The proposed inverter was verified through experimental results with four scenarios in a lab-scale testbed. These four scenarios include grid normal conditions, grid voltage fluctuations, grid frequency fluctuations, and a power blackout. The experimental results demonstrated that the proposed inverter could enhance the microgrid stability against grid abnormal conditions, fluctuations of grid frequency and voltage, and charge EVs in an appropriate mode.

Suggested Citation

  • Yohan Jang & Zhuoya Sun & Sanghyuk Ji & Chaeeun Lee & Daeung Jeong & Seunghoon Choung & Sungwoo Bae, 2021. "Grid-Connected Inverter for a PV-Powered Electric Vehicle Charging Station to Enhance the Stability of a Microgrid," Sustainability, MDPI, vol. 13(24), pages 1-16, December.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:24:p:14022-:d:706186
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    References listed on IDEAS

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    2. Cheng, Yi & Azizipanah-Abarghooee, Rasoul & Azizi, Sadegh & Ding, Lei & Terzija, Vladimir, 2020. "Smart frequency control in low inertia energy systems based on frequency response techniques: A review," Applied Energy, Elsevier, vol. 279(C).
    3. Johnson, Samuel C. & Rhodes, Joshua D. & Webber, Michael E., 2020. "Understanding the impact of non-synchronous wind and solar generation on grid stability and identifying mitigation pathways," Applied Energy, Elsevier, vol. 262(C).
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    1. Ali Jawad Alrubaie & Mohamed Salem & Khalid Yahya & Mahmoud Mohamed & Mohamad Kamarol, 2023. "A Comprehensive Review of Electric Vehicle Charging Stations with Solar Photovoltaic System Considering Market, Technical Requirements, Network Implications, and Future Challenges," Sustainability, MDPI, vol. 15(10), pages 1-26, May.

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