Analysis and Treatment of 220kV Main Transformer Insulating Cylinder Discharge Failure

Through the analysis of dendritic discharge faults on the 220kV transformer insulating cylinder, the basic process of dendritic discharge faults on the insulating cylinder is expounded. It is demonstrated that the insulation moisture and gas inclusion are the main external factors, and the insulation structure defects and the first oil gas distance on the winding surface are the main internal factors causing the fault. Through the simulation of transformer insulating cylinder discharge accident, the mechanism of the insulating cylinder dendritic discharge is obtained, and the countermeasures for preventing the insulating cylinder discharge are proposed. Finally, the concrete measures to prevent the fault of the insulating cylinder dendritic discharge are put forward.