Magnetic circuit design and performance analysis for three-phase oil-immersed transformer

被引：0
|
作者：
Jing Y.-T. [1 ]
Wang H. [1 ]
Li Y. [1 ]
机构：
[1] National Engineering Research Center for REPM Electrical Machines, Shenyang University of Technology, Shenyang
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2019年 / 23卷 / 03期
关键词：
Local overheating; Loss distribution; Magnetic structure; Magnetic-thermal coupling; Transformer;
D O I：
10.15938/j.emc.2019.03.004
中图分类号：
学科分类号：
摘要：
Aiming at the unscientific structure of three-phase oil-immersed transformer magnetic circuit at current, a new three-phase oil-immersed transformer magnetic circuit structure was developed by introducing the shielding structure of foreign transformer bodies and combining with the existing shielding structure in China. Based on the three-dimensional finite element numerical calculation and thermal flux analysis method, the transformers magnetic-thermal coupling mathematical model was set up, the leakage magnetic field, metal structure flux density, loss and temperature rise of the new magnetic circuit structure of transformer were calculated and analyzed and the influence of new structure was analyzed on hot spot temperature rise by prototype test. Through calculation and analysis, it can be obtained that in the new magnetic structure the design of the active part is simplified and the types of production materials is reduced. At the same time, the hidden danger of local overheating is eliminated, and the production cost is reduced. The research shows that it has theoretical and practical significance to carry out transformer magnetic circuit design by combining physical field numerical simulation with experimental research. © 2019, Harbin University of Science and Technology Publication. All right reserved.
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页码：26 / 33
页数：7
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