电力机车主变压器油箱损耗的三维有限元分析

利用基于边单元的有限元法,对一台200km/h高速电力机车主变压器的油箱损耗进行了三维有限元分析和计算。由于电力机车主变压器是高漏抗,多绕组变压器,经试验(采用放大法)得到该台变压器油箱损耗为31.245kW,使用FEM二维有限元分析法计算结果为45.791kW,而采用三维有限元分析法计算结果为30.478kW。从而表明,采用三维有限元分析能够更加准确地计算主变压器油箱的涡流分布和杂散损耗,为其采取有效的屏蔽措施提供了更加可靠的科学依据。

3D Finite Element Analysis of the Transformer Tank Loss in Electric Locomotive

The paper deals with the 3D finite element analysis of the loss of the tank in main transformer of 200 km/h electric locomotive based on edge element. As the main transformer of electric locomotive is of high leakage reactance and multi-winding, the measured value of the tank loss is 31.245 kW with magnification method, while the result of the tank loss is 45.791 kW with 2D finite element method(FEM) and 30.478 kW with 3D FEM. Compared with the test, it shows that the 3D FEM may provide more accurate values for evaluating the eddy current loss and stray loss of the tank. The new calculations provide more scientific rules for the corresponding shielding measure.