Impulse transient characteristic of grounding grids

Author

Yanqing, Gao ; He Jinliang ; Rong, Zeng ; Xidong, Liang

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

fYear

2002

fDate

21-24 May 2002

Firstpage

276

Lastpage

280

Abstract

The lightning transient characteristics of a substation grounding grid are analyzed in detail, especially considering the dynamic and nonlinear effects of soil ionization around grounding conductors and the inductance between grounding conductors. The analysis results are calculated by a loss transmission-line model with distributed time-variable parameter. The influences of grid structure, feed point location, and shape of the lightning impulse current on the transient characteristics of grounding grids are discussed.

Keywords

earthing; electric breakdown; ionisation; lightning protection; power system simulation; power system transients; soil; substation protection; time-varying systems; transient response; transmission line theory; distributed time-variable parameters; feed point location; grid structure; grounding conductor inductance; grounding grids; impulse current shape; impulse transient characteristics; lightning impulse current; lightning protection; lightning strikes; lightning transient characteristics; loss transmission-line models; soil electrical breakdown; soil ionization dynamic nonlinear effects; substations; Conductors; Grounding; Inductance; Ionization; Lightning; Propagation losses; Soil; Substations; Transient analysis; Transmission lines;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2002 3rd International Symposium on

Print_ISBN

0-7803-7277-8

Type

conf

DOI

10.1109/ELMAGC.2002.1179385

Filename

1179385