Investigation of lightning over-voltages in buried cables based on predicted characteristics of breakdown paths in soils

Author

Song, Zeqing ; Raghuveer, M.R. ; He, Jingliang

Author_Institution

Dept. of Electr. & Comput. Eng., Manitoba Univ., Winnipeg, Man., Canada

Volume

1

fYear

2003

fDate

4-7 May 2003

Firstpage

391

Abstract

Assessment of over-voltage in underground power distribution cables, due to lightning strikes impacting the earth´s surface and terminating on the cable, is important in the design of suitable protection schemes and mitigating strategies. Existing models do not account adequately the effect of the characteristics of soil breakdown channels intercepted by the cable. In this paper, over-voltage in underground cable is investigated by considering the effect of the characteristics of soil breakdown paths predicted using a suggested model on an electric-field-related probabilistic basis. The model provides probabilistic information on the over-voltage in struck cables for different soil characteristics and geometrical configurations.

Keywords

lightning protection; overvoltage; power cables; power distribution lines; probability; underground cables; breakdown soil paths; buried cables; earth surface; electric-field-related probabilistic test; lightning; over-voltage; underground power distribution cables; Circuit simulation; EMTDC; Electric breakdown; Lightning; Power distribution; Predictive models; Protection; Soil; Solid modeling; Underground power cables;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on

ISSN

0840-7789

Print_ISBN

0-7803-7781-8

Type

conf

DOI

10.1109/CCECE.2003.1226423

Filename

1226423