Heat analysis of the power transformer bushings using the finite element method

被引：32
|
作者：
Allahbakhshi, Mehdi [1 ]
Akbari, Milad [1 ]
机构：
[1] Shiraz Univ, Sch Elect & Comp Engn, Shiraz, Iran
来源：
APPLIED THERMAL ENGINEERING | 2016年 / 100卷
关键词：
Power transformer; Bushing; Finite element method; Hottest spot temperature; Temperature distribution; THERMAL PERFORMANCE; INSULATION;
D O I：
10.1016/j.applthermaleng.2016.02.065
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Reliability of power transformers significantly depends on the performance of their bushings and bushing lifetime is mainly dependent on its hottest spot temperature, which is caused by the power dissipation in the bushing's conductor. In this paper, the thermal analysis of the bushing is firstly performed in two-dimensional space using the differential equations. Then, the Finite Element Method (FEM) is employed to determine a bushing's temperature distribution and specify its hottest spot. The effects of increasing the temperature on the bushing's conductor are also investigated and the results are compared in different currents. The proposed method calculates the temperature distribution in all parts of bushing including conductor surface, paper, porcelain and oil. It is useful for manufacturer and utilities to evaluate the insulation design, temperature distribution and loss of insulation life. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：714 / 720
页数：7
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