Title :
The effect of soil ionization on the lightning performance of transmission lines
Author :
de Souza, Ronaldo E. ; Silveira, Fernando H. ; Visacro, Silverio
Author_Institution :
LRC - Lightning Res. Center, Fed. Univ. of Minas Gerais, Belo Horizonte, Brazil
Abstract :
This work aims to discuss the impact of considering the soil ionization effect on evaluations of the lightning performance of transmission lines, in terms of backflashover occurrence. The representation of this effect is considered by means of a methodology that assumes the increase of the electrode equivalent radius. Computational simulations using the Hybrid Electromagnetic Model were developed in a 138 kV-line study case. The results indicate a reduction on probability of backflashover occurrence.
Keywords :
earth electrodes; flashover; ionisation; lightning; power transmission lines; probability; soil; backflashover occurrence; electrode equivalent radius; hybrid electromagnetic model; lightning performance evaluation; probability; soil ionization effect; transmission line; voltage 138 kV; Conductivity; Grounding; Ionization; Lightning; Poles and towers; Resistance; Soil; backflashover; grounding; lightning performance of transmission lines; overvoltages; soil ionization;
Conference_Titel :
Lightning Protection (ICLP), 2014 International Conference o
Conference_Location :
Shanghai
DOI :
10.1109/ICLP.2014.6973332
