Simulation of Multi-physical Field of 10 kV Oil-immersed Transformer Based on Adaptive Grid Control

被引：0
|
作者：
Deng Y. [1 ]
Ruan J. [1 ]
Dong X. [1 ]
Wu Y. [1 ]
Zhang C. [1 ]
Chen Q. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Wuhan University, Wuhan
来源：
Gaodianya Jishu/High Voltage Engineering | 2022年 / 48卷 / 08期
基金：
中国国家自然科学基金;
关键词：
adaptive mesh; hot-spot temperature; multi physical field; oil-immersed transformer; temperature rise test;
D O I：
10.13336/j.1003-6520.hve.20211760
中图分类号：
学科分类号：
摘要：
In order to avoid the grid redundancy caused by global encryption in the calculation of multi physical fields of transformer, an adaptive grid generation method based on error analysis is proposed in this paper. Firstly, the loss distribution of transformer is determined by magnetic field analysis based on edge finite element method. Then, the transformer initial thermal fluid field distribution is determined by the finite volume method. Based on the error calculation formula of transformer temperature fluid field calculation element, the elements with large numerical calculation error in the calculation process of transformer temperature fluid field can be extracted, so as to realize the adaptive mesh refinement. The fluid velocity in x, y and z directions is taken as the error control variables, and the grid is adaptively encrypted for three times. After the third time, the whole grid is 65.6% of the number of grids under global encryption, and the computing time is reduced by 36.0%. At the same time, the maximum absolute temperature difference between the calculated value and the test value of transformer temperature measurement points and winding hot spot temperature is not more than 3 ℃, which verifies the accuracy of the simulation results. The research of this paper can provide reference for the mesh quality optimization control of transformer multi physical field calculation. © 2022 Science Press. All rights reserved.
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页码：2924 / 2933
页数：9
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