基于多场耦合模型的GIS断路器温度场仿真分析  

Simulation analysis of temperature field of GIS circuit breakerbased on multi-field coupling model

作　　者：陈邦发 贺博[2] 谢志杨 潘英杰 杨瑞明 CHEN Bang-fa;HE Bo;XIE Zhi-yang;PAN Ying-jie;YANG Rui-ming(Foshan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Foshan 528000,China;State Key Laboratory for Electrical Insulation of Electric Equipment,Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]广东电网有限责任公司佛山供电局,广东佛山528000 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《陕西科技大学学报》2023年第5期152-160,共9页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51977170);南方电网公司科技项目(030600KK52180217)。

摘　　要：气体绝缘开关(GIS)是电网中的重要电气设备,其运行状态关系到电网的稳定运行.针对的GIS断路器温升问题,在综合考虑其内部热源形成、热流传输及关键影响因素的基础上,建立了电磁-温度-流场多场耦合有限元计算模型,得到其温度分布规律.并基于不同电接触状态下整体温度场及温升仿真数据,对断路器异常发热引发因素和危害程度进行了对比分析.结果表明,相同接触电阻下,排布方式对于壳体温升极值及分布位置具有明显影响,立式布置下最大温升点沿轴向偏移程度大于卧式,但最大温升值要低于卧式;此外,触头同轴度对温升影响非常显著,相同接触电阻下,一旦出现同轴度偏移,温升将显著增加.研究结果可为GIS断路器过热故障带电检测提供参考.Gas-insulated switchgear(GIS)is a critical component of the power grid,and its operational status directly impacts the stability of the entire system.To address the issue of temperature rise in GIS circuit breakers,a multi-field coupling finite element calculation model of the electromagnetic-temperature-flow field is developed based on a comprehensive analysis of internal heat generation,heat transfer,and key influencing factors.Through the analysis of the temperature distribution and rise under different electrical contact states,we identify the factors that contribute to abnormal heating and the extent of damage.Our findings reveal that the arrangement method has a significant impact on the extreme value and distribution position of the temperature rise of the shell,with the maximum temperature rise point being more axially offset in the vertical arrangement than in the horizontal one,while the maximum temperature rise value is lower in the former.Furthermore,the contact coaxiality is found to have a significant effect on the temperature rise,with any deviation resulting in a significant increase in temperature rise.These research results provide valuable insights for live detection of over-temperature faults in GIS circuit breakers.

关 键 词：GIS断路器 多物理场耦合 排布方式 同轴度偏移 温升特性 

分 类 号：TM854[电气工程—高电压与绝缘技术]