An efficient time-domain method for lightning induced voltage calculation on a finite-length horizontal overhead conductor above lossy ground

Abstract

SUMMARY This paper presents an efficient method for the calculation of the induced voltage in a finite‐length horizontal overhead conductor over a finitely conducting earth. The method uses the classical Rusck's analytical expression for perfect conducting earth added to a second component that considers the influence of the horizontal electric field developed at the surface of a finitely conducting earth. The results obtained with the proposed formulation are compared with a computer code based on the Finite‐Difference Time‐Domain (FDTD) Method earlier presented by the authors as well as with different formulations proposed by Paolone et al., He‐Ming et al. and Andreotti et al. In all cases, a very good agreement is verified. The presented formulation is very efficient in saving computer time and may be a powerful tool for lightning performance analysis of overhead distribution lines. Copyright © 2013 John Wiley & Sons, Ltd.

Indirect Lightning Performance of Aerial Distribution Lines Considering the Induced-Voltage Waveform

“…The analytical formulation presented in [8] was used to obtain the LIV waveform for each stroke. The current waveform considered is triangular, with time-to-half value equal to 75 μs, which is the median value for negative first strokes according to Anderson and Eriksson [14].…”

“…In order to overcome this problem, in this paper, the authors used an analytical expression that provides directly the LIV waveform [8]. This approach reduces significantly the processing time and allows the evaluation of the insulation breakdown considering the LIV waveform.…”