The determination of critical points on High Voltage / Extra High Voltage over-head lines caused by lightning strikes using Severity Indexes method

High Voltage / Extra High Voltage over-head lines performance to the lightning strikes can be determined by using lightning strike to ground density level. Thus, an evaluation of the High Voltage / Extra High Voltage over-head lines performance calculation can be accurately done using the density of lightning strike to ground on regions that are passed through the transmission lines. Based on the calculation when it is found above the standard design of the transmission lines, there will be improvements to increase the performance itself.