Accurate estimation of energy losses in power lines considering the resistance variation in time

This study estimates the electrical power losses in overhead power lines taking into account transient thermal processes caused by changes in operating and ambient conditions (wind speed and direction, air temperature). We solved the heat balance equation for the transient thermal condition of the wires to obtain the electrical power losses as specified in the Directive No. 326 of the Russian Ministry of Energy dated December 30, 2008. The proposed method directly estimates the losses. We analyzed the results, found discrepancies and performed a feasibility study.