Electromagnetic compatibility of transmission line equipment with insulated wires

Abstract

The technique of selecting surge suppressors (SPDs) taking into account the peculiarities of power transmission lines is presented. This technique makes it possible to achieve the required level of electromagnetic compatibility of elements of equipment of overhead lines with insulated wires. Selection of arresters is made according to several parameters, including coordination of lightning and switching overvoltages. In three-phase networks, special attention must be paid to short-term overvoltages. The correct selection of arrester according to this criterion is conditioned by the reliability of resonant overvoltages estimation or the probability of occurrence of arc overvoltages. This methodology makes it possible to achieve the required level of electromagnetic compatibility of elements of power line equipment.