直流偏磁状态下变压器结构件损耗计算及屏蔽措施分析

Loss Calculation of Structure and Shield Measure Analysis for Transformer under DC Bias

针对变压器直流偏磁状态下的电磁特性,采用场路耦合结合三维有限元算法,分析了单相四柱变压器结构件漏磁场和损耗的变化。通过增加油箱壁磁屏蔽、铜屏蔽、复合屏蔽等多种形式,核算了不同屏蔽措施对结构件损耗值的影响。

Based on the electromagnetic characteristic of transformer under DC bias. The leakage magnetic field and loss of single-phase four-limb transformer are analysed combined with field-circuit coupling and 3 D FEM. The influence of different shields measures on the loss of stuctures is analysed by adding magnetic shield, copper shield and compounded shield to tank.