Model Design and Calculation Validation for Leakage Magnetic Field and Temperature Rise of Transformer Core Tie-plate

According to the actual structure and operation of the transformer, the core tie-plate test model is designed. In order to save memory and computation time, the stray losses in core tie-plate, tank and other structural parts are calculated by using surface impedance method, and core tie-plate temperature rise in different schemes are accurately calculated by magneto-thermal-fluid coupling method. The error of simulation values obtained by this method and experimental values can meet project needs, and it shows that the actual distribution of the surface temperature rise can be reflected more accurately by the calculation method used in this paper, which provides a more efficient and reliable analysis method to prevent overheating of transformer core tie-plate.