Analysis of Temperature Rise Characteristics and Current Carrying Capacity of Overhead Conductor

Abstract

With the rapid development of economy, there is a higher demand for the transmission capacity of transmission lines. In this paper, the dynamic calculation of conductor current carrying capacity is carried out by numerical calculation method; Considering the influence of the air gap inside the conductor on the temperature distribution of the conductor, the radial temperature gradient model of the conductor is established, and the radial temperature distribution equation of the conductor is obtained. Based on the simplified equivalent thermal conductivity, the electrothermal coupling numerical calculation is carried out to study the radial temperature distribution of the conductor, and the effects of wind speed, ambient temperature and applied current on the temperature rise of the conductor are analyzed. It has played a positive supporting role in improving the transmission capacity of existing lines and ensuring the safe, stable and reliable operation of the power grid.