EARTHING EFFECTIVE LENGTH FOR LOW AND HIGH AMPLITUDES OF LIGHTNING IMPULSE CURRENTS

被引：0
|
作者：
Wojtas, Stanislaw [1 ]
机构：
[1] Gdansk Univ Technol, Gdansk, Poland
来源：
ELECTROMAGNETIC DISTURBANCES EMD' 2012 | 2012年
关键词：
Lightning protection earthing; earthing impulse impedance; effective length of earthing; test of earthings;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Earthings of the electrical power systems can achieve wide sizes. Due to equipotential bondings and a presence of main equipotential bar the earthing system can be connected even to a power transformer neutral point. Evaluation of such wide earthings for lightning protection purposes can not be easy to perform because only a part of the earthing system should be taken into account. This useful part of the earthing is described as its effective length. The paper deals with a method of effective length calculations and in order to explain the notion computer simulations and measurements of a model as well as a real earthing have been performed using impulses of 1, 4 and 10 mu s front times. A good convergence investigation results have been obtained.
引用
收藏
页码：137 / 141
页数：5
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