Lightning-Induced Voltage Calculations on an Overhead Insulated Cable

In this paper, a study is performed to identify the influence of an insulating layer surrounding an overhead cable on the transient overvoltages induced by nearby lightning strikes. The study is performed considering or neglecting the presence of an insulating layer for different load conditions. It is shown that including an insulating layer might be important to accurately characterize the tail of the resulting transient overvoltages whenever mismatched loads are considered at the line ends. On the other hand, calculated peak voltages are nearly unaffected by the presence of the insulating layer.