Abstract:Transformer bushing is mainly used to fix the leads and ensure the external insulation of the leads. It is subjected to multiple physical fields of electricity, heat and force for a long time in operation, and its stability determines the safe operation of transformer. Firstly, the origin of bushing is briefly described, the evolution of bushing in time, structure and material are summarized. Then, the defects and faults affecting the safety and stability of bushing, such as overheating, partial discharge and earthquake damage, are analyzed. Moreover, the existing effective solutions and detection techniques for the above problems are summarized, and the timeliness and reliability of each method are compared. Finally, the development goals of transformer bushing with miniaturization and lightweight, low cost and large capacity are put forward, which can provide references for the development of domestic transformer bushing.