Title :
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
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;
Conference_Titel :
Electromagnetic Compatibility, 2002 3rd International Symposium on
Print_ISBN :
0-7803-7277-8
DOI :
10.1109/ELMAGC.2002.1179385
