Aiming to study the stray losses and temperature distribution of power transformer ascending flange, a 1:1 test model is built, and the corresponding three-dimensional (3D) finite-element analysis (FEA) model is established. Then the influence of shielding on stray losses distribution is simulated by surface impedance method, and the 4mm copper shielding is selected as the optimized one. Besides, a mixed steel tank lid structure is proposed to limit the maximum loss density in the tank lid. Finally, the temperature field of ascending flange based on magneto-thermal coupling method is simulated, which can provide an effective guidance for allowable lead current and the related optimization.

中文翻译：

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磁屏蔽对变压器上升法兰邻近部位杂散损耗和温升影响的数值分析


为了研究电力变压器上升法兰的杂散损耗和温度分布，建立了1:1的试验模型，并建立了相应的三维（3D）有限元分析（FEA）模型。然后采用表面阻抗法模拟屏蔽对杂散损耗分布的影响，并选择4mm铜屏蔽作为优化屏蔽。此外，提出了混合钢罐盖结构来限制罐盖的最大损失密度。最后，基于磁热耦合方法对上升法兰的温度场进行了仿真，可为许用引线电流及相关优化提供有效指导。