Impacto da Resistência de Aterramento na Análise de Desligamentos por Tensões Induzidas Devido a Descargas Atmosféricas em Linhas de Distribuição

João A. C. Almeida; Rodolfo A. R. Moura; Marco A. O. Schroeder; Fernando A. Assis

doi:10.20906/sbse.v2i1.3135

João A. C. Almeida Universidade Federal de São João del-Rei (UFSJ), MG
Rodolfo A. R. Moura Universidade Federal de São João del-Rei (UFSJ), MG
Marco A. O. Schroeder Universidade Federal de São João del-Rei (UFSJ), MG
Fernando A. Assis Universidade Federal de São João del-Rei (UFSJ), MG

DOI: https://doi.org/10.20906/sbse.v2i1.3135

Keywords: Lightning, distribution lines, induced overvoltages, Monte Carlo method

Abstract

The assessment of distribution systems performance is a key factor to guarantee the continuity of energy supply. Hence, understanding the impacts that lightning can generate in this type of system is a matter of relevant importance. Therefore, this work aims to investigate the impact of grounding resistance on the distribution line lightning performance considering induced overvoltages. The present work is based on the theory proposed by Sune Rusck and later extended by J. O. Paulino. For this analysis, the Monte Carlo Method was also used in a computational routine to estimate the number of expected shutdowns of a distribution line. Thus, simulations were carried out with different values of grounding resistance and the number of shutdowns was calculated as a function of these values. According to the results, the value of the grounding resistance significantly impacts the expected number of shutdowns for a given distribution line.