基于相似模型的气体绝缘母线接头过热失效模拟  

Overheat Failure Simulation Test for Gas-Insulated Switchgear Bus Contact Based on Scale Model

作　　者：李洪涛 陶风波 贾勇勇 高山 周志成 舒乃秋[2] 

机构地区：[1]国网江苏省电力公司电力科学研究院,南京211103 [2]武汉大学电气工程学院,武汉430072

出　　处：《电工技术学报》2016年第12期99-107,共9页Transactions of China Electrotechnical Society

摘　　要：为研究气体绝缘母线(GIB)接头过热性故障的形成、发展过程,开展了母线接头的过热性失效模拟试验。受原型试验条件、试验时间及试验成本等因素的限制,采用相似模型进行物理模拟试验研究。通过对气体绝缘母线接头的温升现象进行相似性分析,推导了涡流-流体-热场相似关系,设计并试制了气体绝缘母线的相似模型,给出了模型的几何条件、物理条件和边界条件,并通过数值计算和物理模拟试验验证了模型的有效性。基于该模型进行气体绝缘母线接头温升特性和过热失效的试验研究,观察了母线接头接触不良情况下发热直至熔化的物理过程并监测了接头的温度变化。Overheat failure simulation tests are carried out to study the formation, developing process and the results of overheat failures in gas-insulated bus（GIB） bar. With the constraints of prototype tests, scale model is used in the physical simulation tests. Scaling criterions of the coupled eddy current-fluid-thermal field are derived and simplified by analyzing the similarity of temperature rise in GIB contacts. Scale model of GIB is designed and produced with the given geometric conditions, physical conditions and boundary conditions. Tests and numerical calculations verify the scale model. Under the poor contact, the temperature rise simulation test and the overheating failure simulation test are carried out to analyze the physical processes of the overheating and the variations of temperature on contacts.

关 键 词：模拟试验 相似方法 气体绝缘母线接头 过热失效 温升特性 

分 类 号：TM506[电气工程—电器]