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A Method for Calculating Grounding Resistance of Reinforced Concrete Foundation Grounding Systems

Author

Listed:
  • Bowen Dou

    (School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China)

  • Rui Liu

    (Power Transmission and Transformation Engineering Department, China Electric Power Research Institute, Beijing 100055, China)

  • Youping Tu

    (School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China)

  • Bo Zhang

    (Department of Electrical Engineering, Tsinghua University, Beijing 100084, China)

Abstract

Tower foundations have been used as grounding electrodes to reduce the area of the grounding devices. However, it is difficult to calculate the grounding resistance due to the complex structure of the reinforced concrete foundation. A method for calculating grounding resistance of reinforced concrete foundations is proposed in this paper. The method equates the complex foundation structure into a cylindrical conductor and then calculates the grounding resistance with the help of the method of moments, which simplifies establishment of the simulation model and reduces the extensive computation. In addition, the applicability of the equal cross-sectional area method and the equal cross-sectional perimeter method is analyzed. It shows that both methods are applicable only when the concrete resistivity is close to the soil resistivity. The equal cross-sectional area method is applicable when the concrete resistivity is within twice the soil resistivity, while the equal cross-sectional perimeter method is applicable when the concrete resistivity is approximately same or less than the resistivity of the soil.

Suggested Citation

  • Bowen Dou & Rui Liu & Youping Tu & Bo Zhang, 2022. "A Method for Calculating Grounding Resistance of Reinforced Concrete Foundation Grounding Systems," Energies, MDPI, vol. 15(13), pages 1-10, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4607-:d:846394
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    References listed on IDEAS

    as
    1. Hanis Hamizah Hizamul-Din & Normiza Mohamad Nor & Nurul Nadia Ahmad & Nur Farahi Idris & Azwan Mahmud, 2021. "Investigations on the Performance of Various Horizontal Ground Electrodes," Energies, MDPI, vol. 14(4), pages 1-12, February.
    2. 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. "Influence of Lightning Current Parameters and Earthing System Designs on Tower Footing Impedance of 500 kV Lines," Energies, MDPI, vol. 14(16), pages 1-19, August.
    Full references (including those not matched with items on IDEAS)

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    1. Normiza Mohamad Nor, 2023. "Review: Factors Affecting the Performance of Ground Electrodes under High Impulse Currents," Energies, MDPI, vol. 16(10), pages 1-13, May.

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