Mantenimiento predictivo en subestación de distribución de UCSG – Facultad Técnica empleando termografía de rayos infrarrojos y Megger Flucker.

Abstract

The present work consists of executing Predictive Maintenance in the electric power distribution substation of the technical education faculty for the development of the electronic engineering career using infrared thermography and Megger Flucker. The results of thermographic monitoring of power transformers are presented in the document. It is necessary a constant supervision of the power transformers which implies: core temperature measurement, winding, oil, oil humidity, analysis of dissolved gases in the oil. Also, it is considered the scope of analysis and frequency of the recording during the operation may vary (depending on the device). The oil in the transformer is filled and can be cleaned (by vacuum treatment) during service inspections. It allows the elimination of most of the water and the dissolution of the oil. This action indirectly improves the insulation of the paper (the dehumidification of the paper insulation is produced by removing the water from the transformer oil). A series of thermographies were taken. The areas on the transformer surfaces were analyzed for a higher temperature in aspects of: electrical isolation condition of the transformer, area on the surface, measurement station. The increase in temperature causes a decrease in the resonance peak in windings of different designs. It means that the overheating of metals, but also of insulating oils can affect the condition of the electrical machinery (condition of the machinery and parameters of the transformed energy).