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Effect of Soil Resistivity Measurement on the Safe Design of Grounding Systems

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  • Vasilios P. Androvitsaneas

    (High Voltage Laboratory, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Politechniou Str., Zografou Campus, GR15780 Athens, Greece)

  • Katerina D. Damianaki

    (High Voltage Laboratory, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Politechniou Str., Zografou Campus, GR15780 Athens, Greece)

  • Christos A. Christodoulou

    (High Voltage Laboratory, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Politechniou Str., Zografou Campus, GR15780 Athens, Greece)

  • Ioannis F. Gonos

    (High Voltage Laboratory, School of Electrical and Computer Engineering, National Technical University of Athens, 9 Iroon Politechniou Str., Zografou Campus, GR15780 Athens, Greece)

Abstract

A prerequisite for the proper and safe designing of a grounding system is the full knowledge of the ground structure in the terrain of installation. Through soil resistivity measurements, engineers are able to illustrate the ground profile, which constitutes the most significant parameter for the design of a grounding system and for determining the maximum permissible limits of step and touch voltages. This paper highlights the high importance and necessity for engineers to choose the proper measurement axes of soil resistivity in the terrain of interest and to choose suitable measurement depths, as well the combination of axes for the final determination of the ground profile. The variance of soil resistivity values, as a function of axis distance and the impact of axis placement on determining the uncertainty of measurements, is also analyzed in detail in this study. Furthermore, this work studies the value variance of step and touch voltages as a function of measurement axes, considering two- and three-layer soil models, based on soil resistivity field measurements performed at the university campus. Therefore, the proper and premeditated measurement of soil resistivity, particularly in anisotropic ground, is proved to be of major importance for the full designing of a safe grounding system.

Suggested Citation

  • Vasilios P. Androvitsaneas & Katerina D. Damianaki & Christos A. Christodoulou & Ioannis F. Gonos, 2020. "Effect of Soil Resistivity Measurement on the Safe Design of Grounding Systems," Energies, MDPI, vol. 13(12), pages 1-13, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:12:p:3170-:d:373455
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    References listed on IDEAS

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    1. Yaguang Tao & Jianchun Wei & Qingquan Li & Yalin Shi & Tongqiao Zhang & Jiwei Zhang & Xiao Liu, 2018. "The Effect of a Large Backfill Area on Grounding Grid Performance," Energies, MDPI, vol. 11(4), pages 1-13, March.
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    Cited by:

    1. Donghui Luo & Yongxing Cao & Yu Zhang & Shijun Xie & Chenmeng Zhang & Shuping Cao, 2021. "Study on Structural Parameters and Analysis Method of Soil Successive Impulse Discharge Channel," Energies, MDPI, vol. 14(4), pages 1-17, 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.

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