Influence of a more accurate soil representation in electromagnetic transient phenomena

In this article a more accurate representation of soil behavior for transient studies is presented. The proposed model takes into account the earth conductivity and permittivity frequency dependence, which normally is not considered. One of the aspects covered in the paper is the importance of properly considering the earth´s electromagnetic behavior when calculating transmission line parameters. For an actual 440 kV three-phase transmission line, the soil behavior is represented through a unique real value of conductance ( the normal approach) and through the proposed model.