Modeling and Analysis of Tank Rupture Due to Internal Electrical Fault in Oil-filled Power Transformer

In recent years, oil-filled power transformer explosion accidents occur from time to time, and have caused serious effect to the power system. To analyze the cause of oil tank rupture, a new numerical simulation model is established to calculate internal pressure rise caused by arc fault, and stress field of the tank body. Based on theories of wave acoustics, thermodynamics and solid mechanics, the model describes bubble’s generation, propagation of pressure wave, and deformation of the transformer tank. The simulation results are in good agreement with accident phenomena, which can provide reference for the future accident prevention.