An Approximate Formula for Estimating the Peak Value of Lightning-Induced Overvoltage Considering the Stratified Conducting Ground
An Approximate Formula for Estimating the Peak Value of Lightning-Induced Overvoltage Considering the Stratified Conducting Ground
复制标题
考虑分层导电接地的雷击过电压峰值近似估算公式
DOI：
10.1109/tpwrd.2013.2281982
复制
发表时间：
2014
影响因子：
4.4
通讯作者：
Gao Jinge
中科院分区：
文献类型：
--
作者：
Zhang Qilin;Zhang Liang;Tang Xiao;Gao Jinge
本文提出了一种改进和推广的估计架空线路雷电感应电压峰值的近似公式，该公式考虑了水平分层导体接地。本文提出的近似公式是基于回击传输线模型(TL)和梯形雷电回击电流波形，其典型代表前沿时间为3.8μS，回击速度为12 0m/μS，符合CIGRÉ和IEEE1410指南。利用二维有限差分法和Agrawal场-线耦合模型对推广的近似公式进行了验证。计算结果表明，本文提出的雷电电压峰值估算公式简单，适用于水平分层地面情况下雷电电压峰值的估算，具有较高的精度。
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.