Performance of Large-Scale Grounding Systems in Thermal Power Plants Against Lightning Strikes to Nearby Transmission Towers

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2019-04-01

Department

Department of Electrical Engineering and Automation

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Language

en

Pages

9

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IEEE Transactions on Electromagnetic Compatibility, Volume 61, issue 2, pp. 400-408

Abstract

In spite of the contemporary interest in renewable power plants, thermal power plants are still inevitable. Various electric equipment and apparatus are grounded via a large-scale grounding system in thermal power plants. In this paper, the three-dimensional finite-difference time-domain method has been employed to study the performance of such a large-scale grounding system against a lightning strike to a nearby transmission tower. The study has emphasized how a nearby sea, which is utilized for cooling purposes in thermal power plants, influences the ground potential rise on the large-scale grounding system considering soil ionization. The results show that the distribution of the ground potential rise on the large-scale grounding system is quite dependent on the alignment of sea with the large-scale grounding system. In addition, the extent that soil ionization affects the ground potential rise is dependent on the distance between the struck tower and the large-scale grounding system.

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Keywords

Electrodes, Electromagnetic fields, Finite-difference time-domain (FDTD) method, Ground penetrating radar, Grounding, Grounding systems (GSs), Ionization, Lightning, Lightning strikes, Power generation, Soil

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DOI

10.1109/TEMC.2018.2831700

Citation

Rizk, M E M, Lehtonen, M, Baba, Y & Abulanwar, S 2019, 'Performance of Large-Scale Grounding Systems in Thermal Power Plants Against Lightning Strikes to Nearby Transmission Towers', IEEE Transactions on Electromagnetic Compatibility, vol. 61, no. 2, 8365887, pp. 400-408. https://doi.org/10.1109/TEMC.2018.2831700

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https://urn.fi/URN:NBN:fi:aalto-201909035177

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[article-cris] Sähkötekniikan korkeakoulu / ELEC