电瓷避雷器Issue(2)：27-33,7.DOI:10.16188/j.isa.1003-8337.2025.02.004
基于多场耦合的35 kV管型母线接触面发热分析
Contact Surface Temperature-Rise of 35 kV Tubular Bus-Bar Based on Multi-Field Coupling
摘要
Abstract
The tubular bus-bar has excellent electrical properties,but the problem of overheating of the contact surface affects the safe and stable operation of the power grid and restricts the development of tu-bular insulated busbars.The temperature distribution on the contact surface of 35 kV tubular bus is used as the research object,and the author analyzed from three aspects:contact resistance,AC loss and eddy current loss.Firstly,the eddy current loss of contact surface is calculated using the finite element method,and the temperature distribution on the contact surface is also calculated based on the principle of multi-field coupling between electromagnetic and thermal field.The results are compared with the temperature-rise experiment of the tubular bus-bar in the laboratory,and the relative error is less than 3%.Finally,the factors which affect the heating of the contact surface are analyzed.It is concluded that temperature rise of the contact surface is increased with the increase of the current,and the temperature of contact surface can be reduced by using metal plating of the contact surface.关键词
管型母线/接触面发热/热电耦合/接触电阻/涡流损耗Key words
tubular bus-bar/heating of contact surface/thermoelectric coupling/contact resistance/eddy current loss引用本文复制引用
余佐文,马爱清,高大崴..基于多场耦合的35 kV管型母线接触面发热分析[J].电瓷避雷器,2025,(2):27-33,7.基金项目
上海市自然科学基金项目(编号:19ZR1420600). Project surpported by Natural Science Foundation of Shanghai(No.19ZR1420600). （编号:19ZR1420600）
