earticle

영어

Use of high temperature conductors is being considered by more and more electric utilities as a means to increase transmission line capacity. Hence there is a need to investigate temperature rise of transmission line insulators when the current carried by the line conductor is high. This has raised questions regarding the effect of these increased temperatures on the performance of all components attached to the conductor, including the insulators. This paper presents the results of finite element simulation of transient thermal conduction analysis to determine the temperatures reached at various locations on the conductor attachment hardware, end fittings of cap and pin type ceramic disc insulator assembly by using commercially available software Ansys-11. Remarkable temperature rise was not observed at porcelain and cement of insulators in spite of the high conductor temperature, suggesting almost no reduction in electrical and mechanical characteristics of insulators for short period of time but for longer period of time and varying environmental conditions there might be development of high temperature and chances of affects of this high temperatures of conductor on the insulator assembly and end fittings of insulator.