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Thin Conductor Modelling Combined with a Hybrid Numerical Method to Evaluate the Transferred Potential from Isolated Grounding System

Author

Listed:
  • Giovanni Aiello

    (Department of Electrical, Electronic and Computer Engineering, 95125 Catania, Italy)

  • Salvatore Alfonzetti

    (Department of Electrical, Electronic and Computer Engineering, 95125 Catania, Italy)

  • Santi Agatino Rizzo

    (Department of Electrical, Electronic and Computer Engineering, 95125 Catania, Italy)

  • Nunzio Salerno

    (Department of Electrical, Electronic and Computer Engineering, 95125 Catania, Italy)

Abstract

Grounding systems are essential parts of substations and power generation stations. The evaluation of transferred potentials from an active grounding system to other passive ones or to any near conductors is an important aspect to be considered, because transferred potentials may cause serious and fatal events. Moreover, it is an intrinsic issue of the Smart Grid where the ground systems of the power and ICT systems could be close to each other. Therefore, the estimation of the transferred potential is necessary at grounding system design stage for people safety and electric components safeguard. Numerical methods are the best choice to perform a truthful estimation, especially when large and complex grounding systems have to be designed. However, this task is complicated by the “unbounded” nature of the electromagnetic field and by the presence of components of extremely different size in the analysis domain. In this paper, an efficient hybrid finite element method is applied for the accurate and fast computation of transferred earth potentials from grounding systems. Moreover, the small dimensions of the components in the analysis domain are taken into account by the use of one-dimensional finite elements inserted in the tetrahedral mesh. It is worth mentioning the additional advantage of obtaining the electric potential on the earth surface without any post-processing operation.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:7:p:1210-:d:217897
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    References listed on IDEAS

    as
    1. Guido Ala & Salvatore Favuzza & Elisa Francomano & Graziella Giglia & Gaetano Zizzo, 2018. "On the Distribution of Lightning Current among Interconnected Grounding Systems in Medium Voltage Grids," Energies, MDPI, vol. 11(4), pages 1-16, March.
    2. 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.
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    1. Nur Alia Farina Mohamad Nasir & Mohd Zainal Abidin Ab Kadir & Miszaina Osman & Muhamad Safwan Abd Rahman & Ungku Anisa Ungku Amirulddin & Mohd Solehin Mohd Nasir & Nur Hazirah Zaini & Nik Hakimi Nik A, 2021. "Impact of Earthing System Designs and Soil Characteristics on Tower Footing Impedance and Ground Potential Rise: A Modelling Approach for Sustainable Power Operation," Sustainability, MDPI, vol. 13(15), pages 1-20, July.

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