Electrothermal analysis and temperature fluctuations' prediction of overhead power lines

摘要

This paper presents an algorithm for the calculation of the thermal impedance of an overhead power transmission line (OHL), the temperature fluctuations due to its continuous load variations and the delay time in which they are noticed. The temperature fluctuations' prediction is resulting from the dynamic thermal analysis of a complete joined electrothermal problem using Fourier analysis. The problem has not only been solved analytically but it has also been simulated and solved with a software package. The comparison between the analytical solution results and the simulation ones shows that the difference between them is almost negligible.