EFFECT OF TEMPERATURE ON DISSIPATION FACTORS OF OIL-PAPER INSULATION USED IN DISTRIBUTION TRANSFORMERS SIMULATED BY VARYING INSULATING OIL LEVELS

The temperature in a distribution transformer can vary depending on the season of the year and load it possesses. This temperature change influences the dielectric response of the distribution transformer. This paper presents the results of the impact of temperature on dissipation factors of oil-paper insulation simulated by varying oil level and temperature values. The dissipation factors were obtained by using AC/DC electric current application mode in Finite Element Method software (COMSOL Multiphysics). The results show that when insulating oil is at the same level, the dissipation factor values are sensitive to temperature change.