Evaluation of performance of groundings electrics in conditions of lightning current

Author

De Paula, Samuel CesarMota ; de Mendonca, R.G. ; Neto, L. Martins ; Medeiros, Carlos A G ; Silva, Rui V R

Author_Institution

Jatai Decentralized Unity, CEFET-GO, Jatai, Brazil

Volume

2

fYear

2001

fDate

2001

Firstpage

737

Abstract

This paper presents a theoretical-experimental study, regarding the influence of the resistive and inductive effects of transients on systems of extensive electric grounding, in particular, of cables and meshes. PI-RL models are proposed that take into account the distributed nature of the resistance and inductance magnitudes. The capacitive effect and the ionization of the soil are not considered. Besides, there is an alternative to model grounding systems in transitory conditions, that is the technique of “system identification”. Simulations are made of the excitations using a current waveform representative of an atmospheric discharge. A method of evaluation of the grounding is delineated in conditions of lightning current

Keywords

earthing; electric resistance; electromagnetic induction; lightning; transients; atmospheric discharge; cables; capacitive effect; current waveform; distributed inductance; distributed resistance; grounding electrics; grounding systems; lightning current; meshes; performance evaluation; simulations; soil ionization; system identification; transitory conditions; Atmospheric modeling; Cables; Circuits; Electric resistance; Grounding; Immune system; Inductance; Lightning; Soil; System identification;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2001. Canadian Conference on

Conference_Location

Toronto, Ont.

ISSN

0840-7789

Print_ISBN

0-7803-6715-4

Type

conf

DOI

10.1109/CCECE.2001.933533

Filename

933533