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Assist. Ahmed Taher Zaki Mohammed :: Publications:

Analysis and Mitigation of Ground Grid Lightning Potential Rise
Authors: Ahmed Taher; Abdelrahman Said; Tamer Eliyan; Abdelsalam Hafez
Year: 2020
Keywords: Grid design; Lightning potential rise; Transient analysis; Mitigation methods
Journal: Transactions on Electrical and Electronic Materials
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Springer
Local/International: International
Paper Link:
Full paper Not Available
Supplementary materials Not Available

Grid design depends mainly on bringing grounding resistance, mesh voltage, and step voltage below tolerable limits when subjected to any ground fault. But, it should be noticed that the grid performance has to be tested when subjected to lightning stroke. The performance of the grid under impulse current differs than that of under power–frequency fault. In this paper ATP-EMTP software is used to analyze the performance of the ground grid when subjected to lightning stroke. Different methods are suggested to mitigate the lightning overvoltage, all of these methods depend mainly on modifying the design by adding more conductors or rods at specific places. The case study under consideration is Al-Mostakbal substation 220/22 kV which is located in Al-Mostakbal city, Cairo, Egypt.

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