Mechanical Condition Assessment of Transformer Winding Based on D-S Evidence Theory

This paper presents a method of transformer winding mechanical condition evaluation based on D-S evidence theory. It takes the S11-M-500/35 transformer as the actual prototype, winds the normal and fault windings, obtains the characteristic information of the windings in different states and quantifies the information and distributing the membership degree, so that the electrical and vibration parameters can be divided into multiple sub evidence bodies according to the characteristics, and establish the transformer body state evaluation model based on evidence theory. The experimental results show that this method can accurately evaluate the current mechanical state of each phase winding, which verifies the accuracy and feasibility of this method.