Influence of the Soil and Frequency Effects to Evaluate Atmospheric Overvoltages in Overhead Transmission Line - Part II: The Influence of the Soil in Atmospheric Overvoltages

This paper presents the influence of soil in the overvoltage caused by lightning. To evaluate this influence, it was necessary to study the influence of soil and frequency in the electromagnetic parameters of the transmission lines. Then to introduce these influences on electromagnetics transients the well-known program ATP/EMTP was used. To compare the results, there are several curves in each one. There is the consideration of the electromagnetics parameters varying with the soil or not.