Transmission line sag influence on lightning stroke probability

S. Alush*, A. Braunstein, D. Elmakias

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Shielding failure in a transmission line occurs when lightning bypasses the ground wires strikes the phase conductors. Most of the probability calculation methods for these failures are electro-geometric empirical they refer to the line as being horizontal. The purpose of this research is to examine the influence of changes on the line sag the tension on the lightning stroke probability. A mathematical model for calculating the shielding failure rate the expected stroke rate on ground wires based on an electro-geometric model on a known probability density function of the stroke flows in the area was developed in this research. The results show that, for single ground wire towers, an increase in the sag (i.e. a decrease in the tension parameter) of the ground wire, relative to the phase conductors, increases the stroke rate on the phase conductors in long spans. This research proposes an analytical calculation method that considers several factors, among them the sag the tension along the span between adjacent towers, the catenary equation the electromagnetic theory.

Original languageEnglish
Pages (from-to)1046-1052
Number of pages7
JournalIET Generation, Transmission and Distribution
Volume6
Issue number10
DOIs
StatePublished - Oct 2012

Fingerprint

Dive into the research topics of 'Transmission line sag influence on lightning stroke probability'. Together they form a unique fingerprint.

Cite this