Cálculo de tensão induzida por descarga atmosférica em linhas aéreas de energia e cabos telefônicos: :uma aborgagem pela teoria de circuitos

Abstract

This work proposes the calculation of induced voltages on overhead power lines and telephones cables by means of a commercial electric circuits simulator, aiming at avoiding the utilization of complex numerical codes specifically oriented to the problem. Up to this stage, the program developed allows its application to multiconductor and multiple grounding overhead lines, as well as to telephone lines. Studies that analyze the incorporation of linghtning arresters and surge protection devices may be carried out, thus enabling the program to be used in studies on overvoltage protection for lines and sensitive eletronic equipment, and studies on electromagnetic compatibility. Several theoretical cases are analysed aiming at understanding the influence of linghtning discharge parameters in induced voltage in aerial lines and telephone cables that, in turn, are presented in several configurations. The results obtained are compared with similar results available in pertinent literature. Some simulations are also compared with experimental results obtained in the United States And in South Africa.