Lightning surge response of ground electrodes

Author

Chisholm, William A. ; Janischewskyj, Wasyl

Author_Institution

Ontario Hydro Res. Div., Toronto, Ont., Canada

Volume

4

Issue

2

fYear

1989

fDate

4/1/1989 12:00:00 AM

Firstpage

1329

Lastpage

1337

Abstract

Lightning surge currents cause nonlinear ionization and transient propagation when injected into ground electrodes. The low-current footing resistance is modeled in terms of electrode length and surface area. The ionization process follows a similarity method originated by A.V. Korsuncev (1958). Calculation and experiment show the surge response of a conducting ground plane. Electrode shape, soil type, ionization and propagation are then combined to provide a comprehensive model of tower footings for use in predicting the lightning outage rates of overhead transmission lines. The model is compared with previous experimental and analytical work and is shown to provide a reasonable match

Keywords

earth electrodes; lightning; poles and towers; surges; conducting ground plane; ground electrodes; lightning outage rates; lightning surge currents; low-current footing resistance; nonlinear ionization; overhead transmission lines; soil type; surge response; tower footings; transient propagation; Electrodes; Grounding; Ionization; Lightning; Optical propagation; Power system transients; Shape; Soil; Surface resistance; Surges;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.25620

Filename

25620