Numerical Investigation of Lightning Electromagnetic Pulse-Induced High Voltage Overhead Transmission Lines

Yoldas A. Y., Demir B., ATEŞ K., ÖZEN Ş.

8th International Electromagnetic Compatibility Conference, EMC Turkiye 2025, Antalya, Türkiye, 14 - 07 Eylül 2025, (Tam Metin Bildiri) identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/emcturkiye67151.2025.11207568
  • Basıldığı Şehir: Antalya
  • Basıldığı Ülke: Türkiye
  • Anahtar Kelimeler: Finite element method (FEM), Hybrid electromagnetic model (HEM), Lightning electromagnetic pulse, Overhead transmission Line, Shielding wire
  • Akdeniz Üniversitesi Adresli: Evet

Özet

In this study, magnetic field induced by a 30-kA lightning current striking the upper-left phase of a 170 kV double-circuit high-voltage transmission line is analyzed using the hybrid electromagnetic model (HEM) and finite element method (FEM) based simulation software, called Comsol Multiphysics. The analysis focuses on a point located 1.75 meters above the ground beneath the lower circuit of the line. The model performs a realistic scenario to model a full three-dimensional geometry of the transmission line (tower height: 34.2 m, cross-arm spacing: 4.6 m), insulator length (1.6 m), and the grounding system. Simulation results reveal the magnetic field distribution consistent with the transient behavior of the lightning current, the shielding effect of the overhead ground wire, and the electromagnetic properties of the soil. Furthermore, FEM based simulations showed that induced voltage to the transmission line reached 35 kV at most.