Electro-thermal analysis of naturally cooled extra high voltage cable sealing end that provided with heat pipe as cooling method

In this paper, an analytical method for the thermal analysis of naturally cooled high voltage cable sealing end provided with heat pipe as method of cooling is introduced. In this analytical method, the axial heat flow as well as the heat convection and radiation are taken into account. To validate the analytical method, a comparison between the experimental results that done by others, the finite element method results and the results obtained by this analytical method is done. It is noticed that there is a good agreement between the results of the three methods. Finally, the analytical method is used to investigate the effect of ambient temperature and the thermal resistivity of the insulation on the temperature distribution along the sealing end and the adjacent cable parts.