TY - JOUR

T1 - Transmission line sag influence on lightning stroke probability

AU - Alush, S.

AU - Braunstein, A.

AU - Elmakias, D.

PY - 2012/10

Y1 - 2012/10

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84867136899&partnerID=8YFLogxK

U2 - 10.1049/iet-gtd.2011.0501

DO - 10.1049/iet-gtd.2011.0501

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AN - SCOPUS:84867136899

SN - 1751-8687

VL - 6

SP - 1046

EP - 1052

JO - IET Generation, Transmission and Distribution

JF - IET Generation, Transmission and Distribution

IS - 10

ER -