Modeling for the Calculation of Overvoltages Stressing the Electronic Equipment of High Voltage Substations due to Lightning

Abstract: The High and Low Voltage networks of a High Voltage Substation are modeled and simulated with the numerical code ATP- EMTP, in order to calculate stimulated overvoltages occurred in the Low Voltage auxiliary network and stressing electronic equipment, due to lightning strokes that strike overhead power lines connected at the High Voltage part. Lightning currents from 10kA to 100kA have been considered and four representative scenarios are presented and analyzed. The most of the cases examined result to overvoltage stressing of the electronic equipment of the substation from 1kV to 2,5kV