Features of Temperature Monitoring of Overhead Power Transmission Lines with Insulated Wires

Abstract

When monitoring the temperature of insulated wires, the temperature is measured on the surface of the insulation rather than the conductor. The insulation is made of cross-linked polyethylene with low heat conductivity, which leads to a significant temperature difference between the conductor and the insulation surface. A method of calculating the temperature of the conductor from the temperature measured on the insulation surface is described. The permissible surface temperatures of 20 and 35 kV SIP-3 wires that allow controlling the line loading are determined.