Grounding grid effective area and impulsive impedance considering statistical-probabilistic characteristics of lightning currents

被引：0

作者：

Moura, Rodolfo A. R. ^{[1
]}

Silva, Gabriel C. P. ^{[1
]}

Oliveira, Elisa M. A. ^{[1
]}

Almeida, Joao A. C. ^{[1
]}

Assis, Fernando A. ^{[1
]}

Schroeder, Marco Aurelio O. ^{[1
]}

机构：

[1] Fed Univ Sao Joao del Rei UFSJ, Elect Engn Dept, Sao Joao del Rei, MG, Brazil

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 2024年 / 236卷

关键词：

Grounding grid; Effective area; Impulsive impedance; Lightning current; Statistical-probabilistic characteristics; Transient behavior; DEPENDENT SOIL MODELS; FREQUENCY-DEPENDENCE; PARAMETERS;

D O I：

10.1016/j.epsr.2024.110916

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The grounding grid transient behavior is an important substation design criterion. This behavior is determined through interaction with impulsive currents typical of lightning. Based on the technical literature, the behavior in question is determined considering fixed current waves, with median parameters (peak values and front and tail times etc.). Therefore, important statistical-probabilistic characteristics of lightning currents, such as correlations and statistical regressions, are not included. From this perspective, this paper includes research into the sensitivity of impulsive impedance and effective area values of substation grounding grids in relation to the waveform of currents typical of the first return strokes. The results (original) illustrate significant sensitivity of the grids transient behavior in relation to those mentioned statistical-probabilistic characteristics, considering a wide range of resistivities in both current injection points considered in this study.

引用

页数：9