Statistic analysis of transformer′s faults and defects at voltage 110 kV and above

The fault and fault detection situation of transformers at voltage 110(66) kV and above in 2005 is analyzed statistically.Based on statistic for the transformers operated in 2005,the cause of fault,the problems in fault detection manage and so on are analyzed.The results of analysis show that main damage is the damage of winding and one of the damage causes is the strength against short-circuit is not enough.