Induced current distribution in 3D soil model as lightning impulse discharge strike earth surface

• Main Authors: Fajingbesi, Fawwaz Eniola, Yusoff, Siti Hajar, Midi, Nur Shahida, Khan, Sheroz, Elsheikh, Elsheikh M. A., Azman, Amelia Wong
• Format: Conference or Workshop Item
• Language: English; English
• Published: Institute of Electrical and Electronics Engineers Inc. 2020
• Subjects: TK Electrical engineering. Electronics Nuclear engineering; TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices
• Online Access: http://irep.iium.edu.my/82330/1/82330_Induced%20Current%20Distribution.pdf; http://irep.iium.edu.my/82330/2/82330_Induced%20Current%20Distribution_SCOPUS.pdf; http://irep.iium.edu.my/82330/; https://ieeexplore.ieee.org/document/9105411
• Institution: Universiti Islam Antarabangsa Malaysia

Discharge current distribution generated as a lightning strike traverse from the atmosphere into a soil surface and below with varying conductivity were investigated using a laboratory-size electrode configuration system consisting of a point discharge electrode and nine under-soil grounding electrodes. Discharge emission and the electric potential of the soil were with significant change upon slight variation in soil conductivity across the surface and along with an increase in depth. Non-linear degradation phenomena in the soil conductivity also occur after a subsequent discharge of lightning strike indicating a breakdown of soil properties. The results of a numerical model in COMSOL Multiphysics AC/DC module further shed a graphical illustration of the current pathway validating the experimental data. © 2019 IEEE.