Computation of Peak Lightning-Induced Voltages Due to the Typical First and Subsequent Strokes Considering High Ground Resistivity

Mohammad E. M. Rizk*, Farhan Mahmood, Matti Lehtonen, Ebrahim A. Badran, Mansour H. Abdel-Rahman

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

It is essential that the insulation system of the overhead distribution lines should be properly designed to ensure their immunity against lightning-induced overvoltages (LIOVs) caused by nearby return strokes. Therefore, accurate calculation of the peak values of LIOVs is important for the insulation design. In this paper, a formula is proposed to calculate the peak values of LIOVs for both first and subsequent strokes. The typical waveforms of the first and subsequent return strokes are adopted for this study considering a wide range of ground resistivity, from 0.25 to 20 k Omega m. The 2-D finite-difference time-domain method associated with the Agrawal coupling model is employed for the calculation of LIOVs. In addition, the effect of ground permittivity on the peak values of LIOVs is also investigated. Finally, the proposed formula is applied to calculate the annual number of flashovers per 100 km of the overhead line.

Original languageEnglish
Pages (from-to)1861-1871
Number of pages11
JournalIEEE Transactions on Power Delivery
Volume32
Issue number4
DOIs
Publication statusPublished - Aug 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Finite-difference time-domain (FDTD) method
  • ground resistivity and permittivity
  • lightning-induced overvoltages
  • overhead line
  • return strokes
  • TRANSMISSION LINE INTERACTION
  • HORIZONTAL ELECTRIC-FIELD
  • OVERHEAD LINES
  • ELECTROMAGNETIC-FIELD
  • INDUCED OVERVOLTAGES
  • TIME-DOMAIN
  • FDTD METHOD
  • MODEL
  • FORMULA
  • EQUATIONS

Cite this