Análise do Raio de Atração de Linhas de Transmissão a Descargas Atmosféricas através de um Modelo Baseado na Física das Descargas (Analysis of the Lightning Attractive Radius of Power Transmission Lines through the Use of a Physically-Oriented Model)

Acácio Silva (acacio@iee.usp.br), Alexandre Piantini (piantini@iee.usp.br)


Universidade de São Paulo
This paper appears in: Revista IEEE América Latina

Publication Date: June 2013
Volume: 11,   Issue: 4 
ISSN: 1548-0992


Abstract:
Models of different degrees of complexity are found in the literature for the estimation of lightning striking distances and attractive radius of objects and structures. However, besides the oversimplifications of the physical nature of the lightning discharge on which most of them are based, till recently the tridimensional structure configuration could not be considered. This is an important limitation, as edges and other details of the object affect the electric field and, consequently, the upward leader initiation. Within this context, the Self-consistent leader initiation and propagation model (SLIM) proposed by Becerra and Cooray is state-of-the-art leader inception and propagation leader model based on the physics of leader discharges which enables the tridimensional geometry of the structure to be taken into account. In this paper, the model is used for estimating the striking distance and attractive radius of power transmission lines. The results are compared with those obtained from the electrogeometric and Eriksson's models.

Index Terms:
electrogeometric model, lightning attachment, lightning interception model, power transmission lines, striking distance   


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