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Design Methods of Underwater Grounding Electrode Array by Considering Inter-Electrode Interference for Floating PVs

Author

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  • Byeong Gwan Bhang

    (Department of Electrical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

  • Gyu Gwang Kim

    (Department of Electrical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

  • Hae Lim Cha

    (Department of Electrical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

  • David Kwangsoon Kim

    (Department of Electrical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

  • Jin Ho Choi

    (Department of Electrical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

  • So Young Park

    (Department of Electrical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

  • Hyung Keun Ahn

    (Department of Electrical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea)

Abstract

An optimal design method is proposed in this paper to improve the safety and price competitiveness of floating photovoltaic (PV) systems. From the standards for grounding by the International Electrotechnical Commission (IEC) 60364, the Electrical Equipment Technology Standards (EETS) are set up for the grounding resistance to be less than or equal to 10 Ω for high voltage (above 750 V DC) and extra high voltage (above 7000 V) systems. In order to satisfy this criterion, a parallel connection of grounding electrodes is essential in the system. Furthermore, inter-electrode interference should be considered to reflect the resistance increase due to the potential increase between electrodes. Therefore, in this study, the parallel grounding resistance according to the distance and number of electrodes, as well as the arrangement method were theoretically predicted and compared with the measured values. For the first time, the design of grounding electrodes has been applied to real floating PV systems and is expected to satisfy EETS.

Suggested Citation

  • Byeong Gwan Bhang & Gyu Gwang Kim & Hae Lim Cha & David Kwangsoon Kim & Jin Ho Choi & So Young Park & Hyung Keun Ahn, 2018. "Design Methods of Underwater Grounding Electrode Array by Considering Inter-Electrode Interference for Floating PVs," Energies, MDPI, vol. 11(4), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:982-:d:141932
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    1. Giovanni Aiello & Salvatore Alfonzetti & Santi Agatino Rizzo & Nunzio Salerno, 2019. "Thin Conductor Modelling Combined with a Hybrid Numerical Method to Evaluate the Transferred Potential from Isolated Grounding System," Energies, MDPI, vol. 12(7), pages 1-11, March.

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