Research on Influence Factors of Winding Hot Spot Temperature of Oil-immersed Transformer Based on Oil Baffle Position

Based on the analysis of the heat transfer mechanism and thermal conduction path of the oil-immersed forced oil circulation transformer, a 240000KVA, 330KV oil-immersed power transformer with forced oil circulation is taken as a research object in the paper. The axial repeatability of the transformer is considered, and the transformer winding oil path model is simplified and analyzed. The influence rule of the position of the oil baffle, the number of guiding zones, and the height of the horizontal oil passage on the hot point temperature of the transformer winding are explored by the finite element three-dimensional simulation analysis. The simulation results have a positive effect on improving the cooling structure and reducing the winding temperature.