Impact of Grounding Modeling on Lightning-Induced Voltages Evaluation in Distribution Lines

Author:

Mestriner DanieleORCID,Ribeiro de Moura Rodolfo AntônioORCID,Procopio RenatoORCID,de Oliveira Schroeder Marco AurélioORCID

Abstract

Lightning-induced voltages are one of the main causes of shutdown in distribution lines. In this work, attention is focused on the effects of wideband modeling of electric grounding in the overvoltage calculation along insulator strings due to indirect lightning strikes. This study is done directly in the time-domain with the grounding being represented with an equivalent circuit accounting for its dynamics. Results show that the adoption of commonly adopted simplified grounding models, such as low-frequency resistance, may lead to an underestimation of the overvoltage. According to the results, differences in the order of 25% can be found in some studied cases.

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

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