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Due to the aging of transformers during their service life, the dielectric resistance of transformer oils decreases. This dangerous situation, which may cause major power outages, needs to be analyzed well in detail. Transformer oils start to deteriorate due to the high electric field between the electrodes. The sharp points on the electrodes accelerate this deterioration process. Therefore, by correctly analyzing the effect of the electrodes on the oil, information about the insulation resistance of the liquid dielectric material can be obtained. In this study, electric fields and potential difference changes of transformer oil under uniform and non-uniform electric fields are investigated. Sphere–sphere electrode configurations were used to provide uniform field, sphere–rod, and rod–rod electrode configurations for non-uniform field effect. With the increase of the non-uniform field effect, higher electric field stress occurred in the transformer oil at the same voltage level.
Cite this article as: F. Atalar, “Analysis of the effect of electrode configuration on the dielectric behavior of transformer oils,” Electrica, 23(3), 666-672, 2023.