Abstract
The temperature increase causes a heating of the line conductors which is at the origin of the tension drops and the losses joule increases in line which cause a dilation of the line conductors. In this paper, we investigate of the ambient temperature influence on some quantities of power lines, including line resistance, line voltage drops, joule losses, and line deflection. The interest of this study is to predict the impact of the temperature rise on the electrical network working in order to optimize the transit of the electrical energy which satisfied the thermic limits of the lines.