电力变压器结构部件杂散损耗的三维有限元分析

Three Dimensional Finite Element Analysis of Stray Loss in Structural Parts of Power Transformers

为了分析电力变压器中结构部件造成的杂散损耗,论文采用三维非线性时间谐波有限元方法(FEM)计算了电力变压器结构部件的漏磁通和杂散损耗。当结构部件的杂散损耗和损耗密度较大时,将导致局部过热并影响变压器的性能。利用磁屏蔽降低电力变压器的杂散损耗和损耗密度,讨论了这些磁屏蔽对结构部件杂散损耗和损耗密度的影响。结果表明,通过增加磁屏蔽可以有效地消除杂散损耗并减少局部过热,所提方法可为变压器的杂散损耗分析和优化设计提供参考。

In order to analyze the leakage flux and stray loss of power transformers,the leakage flux and stray loss of structural components of power transformers are calculated by three-dimensional nonlinear time harmonic finite element method(FEM).When the stray loss and loss density of the structural components are large,it will cause local overheating and affect the perfor⁃mance of the transformer.Magnetic shielding is used to reduce the stray loss and loss density of power transformers.The effects of these magnetic shields on the stray loss and loss density of structural components are also discussed.The results show that the stray loss can be effectively eliminated and the local overheating can be effectively reduced by increasing the magnetic shielding.The pro⁃posed method can provide reference for the analysis and optimization design of the stray loss of the transformer.