Thermal analysis of cold-shrinkable terminal joint of 10 kV XLPE based on temperature-rise tests

被引：0

作者：

Jia, Zhidong ^{[1
,2
]}

Fan, Weinan ^{[1
,2
]}

Yuan, Ye ^{[1
,2
]}

Lu, Guojun ^{[3
]}

Liao, Weiyan ^{[3
]}

Guan, Zhicheng ^{[1
,2
]}

机构：

[1] Department of Electrical Engineering, Tsinghua University

[2] Graduate School at Shenzhen, Tsinghua University

[3] Guangzhou Power Supply Bureau

来源：

Gaodianya Jishu/High Voltage Engineering | 2014年 / 40卷 / 03期

关键词：

3D modeling and simulation; Cold-shrinkable terminal joint; Cross linked polyethylene cable; Heat transfer theory; Temperature distribution; Temperature-rise test;

D O I：

10.13336/j.1003-6520.hve.2014.03.022

中图分类号：

学科分类号：

摘要：

Cold-shrinkable terminal joints have been widely used in 10 kV cross linked polyethylene (XLPE) cable lines, and it is necessary to research the joints' operating characteristics for assessing the operating status of cables and realizing condition-based maintenance of cable lines. Therefore, we established a cable temperature-rise test platform to test a common kind of cold-shrinkable terminal joint of 10 kV XLPE cable, from which we measured the joint's single-phase steady temperature distribution in different load conditions. Based on the heat transfer theory, we calculated the equivalent coefficient of thermal conductivity of the cover layer of joint, which is 0.024 W/(m·°C). We also established a mathematical model of single phase of cold-shrinkable terminal joint, and then compared the results obtained from experiments, theoretical analysis, and 3D modeling and simulation. All the results indicate that both the inner and out layers of cover have steady temperatures increasing nonlinearly with current on the cable, suggesting that the proposed mathematical model is valid, and it could be used to predict and analyze the steady-state temperature distribution of shrink terminals of actual 10 kV cables.

引用

页码：795 / 800

页数：5

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