Simulation Study on the Improvement Scheme of the Square Accident Oil Tank in the Substation

Due to various technical and conditions and other factors, substation accidents occur frequently in the world. When a transformer fails, the insulating oil in the transformer will leak, and the substation will build an accident oil pool to collect and store the leaking insulating oil. The accident oil pool serves as the last “line of defense” for transformer insulation oil leakage, but in the daily operation of the substation, due to the low frequency of use, it is often ignored and cannot attract the attention of the relevant personnel. When the existing accident oil tank in the substation cannot meet the demand, four square accident oil tank improvement schemes are proposed. The excess time and maximum excess of the original design oil tank and the improved oil tank under different working conditions are compared and analyzed. The results show that among the three improved schemes, the separation scheme of oil storage area and drainage area has the best effect.