Lightning Response of Grounding Grids: Simulated and Experimental Results

Author

Visacro, Silverio ; Alipio, Rafael ; Pereira, Clever ; Guimaraes, Miguel ; Schroeder, Marco A. O.

Author_Institution

Lightning Res. Center, Fed. Univ. of Minas Gerais, Belo Horizonte, Brazil

Volume

57

Issue

1

fYear

2015

fDate

Feb. 2015

Firstpage

121

Lastpage

127

Abstract

The response of grounding grids subjected to currents with typical waveforms of first and subsequent lightning return strokes is analyzed, based on experimental and simulated results. Parameters, which characterize this response, such as the grounding potential rise, impulse impedance, impulse coefficient, and effective grid area are determined for grids buried in soils of low, moderate, and high resistivity, varying the grid dimension and considering the frequency dependence of soil parameters. Based on such results, expressions to obtain the impulse impedance from the low-frequency resistance are derived.

Keywords

earth electrodes; lightning protection; soil; effective grid area; first-lightning return stroke; frequency dependence; grid dimension; grounding grids; grounding potential rise; impulse coefficient; impulse impedance; lightning response; low-frequency resistance; response characterization; soil parameters; subsequent lightning return strokes; Conductivity; Electrodes; Ground penetrating radar; Grounding; Impedance; Soil; Soil measurements; Frequency-dependent soil parameters; grounding impedance; lightning response of grounding grids;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/TEMC.2014.2362091

Filename

6963494