Desempenho de Linhas de Transmissão frente às Descargas Atmosféricas Considerando como Fatores de Sensibilidade as Modelagens das Torres e Correlações Estatísticas entre Parâmetros das Ondas de Corrente
Authors
Gabriel Carlos P. Silva
Universidade Federal de São João del-Rei (UFSJ), MG
Marco Aurélio O. Schroeder
Universidade Federal de São João del-Rei (UFSJ), MG
Rodolfo A. R. Moura
Universidade Federal de São João del-Rei (UFSJ), MG
Fernando A. Assis
Universidade Federal de São João del-Rei (UFSJ), MG
Antonio C. S. Lima
Universidade Federal do Rio de Janeiro (COPPE/UFRJ), RJ
Lightning performance, transmission systems, transmission tower modeling, current statistical correlations, alternative transients program
Abstract
Transmission lines lightning performance studies aim to reduce the number of power supply interruptions and associated damages by investigating the processes of incidence on the lines and the responses of the various elements that comprise the system. Thus, different models are discussed in the technical literature regarding the evaluation of transmission line performance, an area that still contains uncertainties. In this sense, this work proposes the analysis of overvoltages on the insulator strings and the performance rates of a 138 kV transmission system, considering as sensitivity factors the transmission towers modeling and the statistical correlation relationships between the characteristic parameters of lightning current waveforms. The results illustrate that this sensitivity is significant, with percentage differences values reaching around 70% depending on the models involved.
