| 摘要: |
| 建立一种新的直流偏磁下三相三柱和三相五柱变压器的电路-磁路耦合模型，磁路模型中考虑了变压器的涡流损耗、铁芯拓扑结构及材料的饱和特性。将涡流产生的磁动势列入磁路方程，磁路方程与电路方程进行耦合，并结合铁芯的非线性特征曲线形成非线性方程组，通过求解该方程组，实现对三相三柱和三相五柱变压器直流偏磁特性的仿真分析。仿真结果证明所提模型能够准确地分析三相变压器的直流偏磁现象。 |
| 关键词: 变压器 直流偏磁 饱和特性 涡流 损耗 模型 |
| DOI： |
| 分类号: |
| 基金项目:山东省高等学校科技计划项目（J09LG64） |
|
| Simulative analysis of three-phase transformer with DC bias |
|
DONG Xia, LIU Zhizhen
|
|
School of Electrical Engineering，Shandong University，Ji’nan 250061，China
|
| Abstract: |
| An electric circuit-magnetic circuit coupling model is built for three-phase three／five-legged transformer with DC bias. The magnetic circuit model considers the eddy current loss of transformer，the topology of magnetic core and the saturation characteristic of core material. The magnetic circuit equations considering the magnetomotive force caused by eddy current are coupled with the electrical circuit equations and the nonlinear characteristic curve of core is combined to form the nonlinear equations，which are then solved for the simulative analysis of DC bias characteristics for three-phase three／five-legged transformer. Simulative results verify that，the proposed model can correctly analyze the DC bias phenomenon of three-phase transformer. |
| Key words: electric transformers DC bias saturation characteristic eddy currents losses models |
