DocumentCode :
80319
Title :
Lightning-Induced Voltages Over Lossy Ground: The Effect of Frequency Dependence of Electrical Parameters of Soil
Author :
Silveira, Fernando H. ; Visacro, Silverio ; Alipio, Rafael ; De Conti, Alberto
Author_Institution :
Lightning Res. Center, Fed. Univ. of Minas Gerais, Belo Horizonte, Brazil
Volume :
56
Issue :
5
fYear :
2014
fDate :
Oct. 2014
Firstpage :
1129
Lastpage :
1136
Abstract :
The impact of the frequency dependence of soil resistivity and permittivity on lightning overvoltages induced on overhead lines over lossy ground is investigated. The Visacro-Alipio expressions were implemented on the hybrid electromagnetic model to take this effect into account. Systematic simulations were performed considering representative current waveforms of first and subsequent strokes and different stroke locations near the simulated overhead line. In general, the results indicated that this effect is responsible for a reduction of the induced overvoltage. This reduction increases with increasing soil resistivity and becomes relevant for soil resistivity above 1000 Ω·m.
Keywords :
lightning; overvoltage protection; permittivity; power overhead lines; soil; Visacro-Alipio expressions; frequency dependence; hybrid electromagnetic model; lightning-induced voltages; lossy ground; overhead lines; soil permittivity; soil resistivity; stroke locations; Conductivity; Extremities; Frequency dependence; Lightning; Mathematical model; Permittivity; Soil; Frequency-dependent electrical parameters of soil; lightning-induced voltages; lossy ground;
fLanguage :
English
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9375
Type :
jour
DOI :
10.1109/TEMC.2014.2313580
Filename :
6798734
Link To Document :
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