NÓBREGA, R. S.; NÓBREGA, Rodrigo Santos da.
Resumo:
Zinc oxide surge arresters are protection equipments widely used in transmission
and distribution systems. When submitted to thermal or electrical stress the surge arrester
characteristics degenerates. Up to today there is no really conclusive surge arrester
evaluation method. One of the most used techniques is the infrared thermography. The goal
of this work is to implement a computational tool to help the measurements made by
infrared thermography, in a way to obtain the temperature of the surge arrester active part.
The computational tool uses as input data the electrical current through the surge arrester
and the room temperature and outputs the thermal behavior of the surge arrester. It was
implemented using C++ programming language, finite volumes, the "multiblock" technique
and generalized coordinates.