An Approximate Formula for Estimating the Peak Value of Lightning-Induced Overvoltage Considering the Stratified Conducting Ground

Author

Qilin Zhang ; Liang Zhang ; Xiao Tang ; Jinge Gao

Author_Institution

Collaborative Innovation Center on Forecast & Evaluation of Meteorol. Disasters, Nanjing Univ. of Inf. Sci. & Technol., Nanjing, China

Volume

29

Issue

2

fYear

2014

fDate

Apr-14

Firstpage

884

Lastpage

889

Abstract

In this paper, we present an improved and extended approximate formula for estimating the peak value of lightning-induced voltages in an overhead line, considering the horizontally stratified conducting ground. The approximate formula proposed in this paper is based on the return stroke transmission-line model (TL) and a trapezoidal lightning return stroke current waveform with the typical representative front time of 3.8 μs and the return stroke velocity of 120 m/ μs according to CIGRÉ and the IEEE Standard 1410 Guide. The extended approximate formula is validated by using the 2-D finite-different time-domain method and Agrawal field-line coupling model. The results show that the proposed approximate formula in this paper is simple and suitable for estimating the lightning-induced voltage peak value considering the horizontally stratified ground with satisfied accuracy.

Keywords

approximation theory; earthing; finite difference time-domain analysis; overvoltage; power overhead lines; 2D finite-different time-domain method; Agrawal field-line coupling model; CIGRÉ; IEEE Standard 1410 Guide; approximate formula; lightning-induced overvoltage; lightning-induced voltage peak value; peak value estimation; return stroke transmission-line model; stratified conducting ground; trapezoidal lightning return stroke current waveform; Conductivity; Couplings; Finite difference methods; Lightning; Soil; Time-domain analysis; Voltage control; 2-D finite-different time-domain (FDTD) method; Agrawal coupling model; lightning horizontal fields; lightning-induced voltage;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2013.2281982

Filename

6766795