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

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2019-04-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
400-408
Series
IEEE Transactions on Electromagnetic Compatibility, Volume 61, issue 2
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.
Description
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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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