PREDICTION TOOL FOR OIL DIELECTRIC PERFORMANCE USING AN ELECTRICAL CIRCUIT APPROACH FOR FRESH SYNTHETIC, NATURAL ESTER, AND MINERAL OILS UNDER AC STRESS

Breakdown voltage and streamer velocity are crucial parameters in evaluating liquid dielectrics used in power transformers. The breakdown phenomenon is a complex physical process that requires a multidisciplinary approach. This paper presents a step-by-step modelling procedure for a single-arc discharge. A point-plane electrode configuration is employed, utilizing three distinct dielectric liquids. An AC voltage is applied, increasing at a rate of 1 kV/s until the breakdown voltage is reached, replicating the experimental setup.