A 110 kV Transformer Fault Simulation and Comprehensive Analysis

According to the statistics of transformer faults in recent ten years, transformer short circuit is the primary cause of transformer faults, accounting for more than 30%. In this paper, in view of a heavy gas action event of 110kV main transformer, combined with the protection action, the fault recording diagram is analyzed in detail, and the preliminary conclusion of the fault cause is given through simulation analysis. The results show that the fault is caused by the inter-turn and inter-layer short circuit fault in the transformer. Combined with this fault, the analysis method of transformer fault is proposed, and the relevant technical measures are put forward for this type of transformer fault, so as to further prevent the occurrence of fault and improve the level of safe operation of transformer.