Seyedeh Maryam Eftekhari - Alborz Electric Power Distribution Company Karaj, Iran
Seyed Aboalfazl Eftekhari - Islamic Azad University of Tehran south Tehran, Iran
Seyedeh Zeinab Eftekhari - Islamic Azad University of Tehran central Tehran, Iran

Distribution systems are considered to be the most extensive parts of a power grid and their protection is a priority. In this paper, we tried to increase the stability of distribution networks versus natural-originated discharge phenomena by locating and optimizing the number of surge arresters. Because distribution networks are more exposed to indirect lightning due to low altitudes, this is why this type of evacuation has been considered and the direct impact of lightning on the lines has been neglected. The final product defines the protective radius of the arrester in a typical latitude and longitude network based on the isocratic indicators of the area.

Protective radius, arrester, isokraunic