ABSTRACT
Substation transformer is an important part of power system and transformer bushing is also one of the important electric transmission and transformation equipment. Massive power outage brought by various insulation destructions of bushing will cause a huge loss to the whole national economy and aect the safe operation of the power grid as well as the safety of the power station sta. Therefore, the insulation state of the main transformer in operation is of great significance for the safety of the power system. Operation and maintenance sta should have an obligation to strengthen monitoring and diagnosis on electrical equipment insulation so as to find hidden troubles timely and guarantee the safe operation of electrical equipment.
