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斜圈弹簧触头接触特性与烧熔机理研究
Study on contact characteristics and melting mechanism of inclined coil spring contact
- 默认刊物名称 2025年
- 作者机构：
国网青海省电力公司电力科学研究院,青海省西宁市810001
- 作者简介：
[ "马永福（1994-），男，本科，工程师，主要从事变电设备诊断试验工作。。" ]
- 基金信息：国网青海省电力公司科技项目(522807240002)
DOI：
中图分类号：收稿日期：2025-02-02，
修回日期：2025-02-18，
录用日期：2025-03-03，
- 稿件说明：
移动端阅览
马永福, 包正红, 任继云, 等. 斜圈弹簧触头接触特性与烧熔机理研究[J/OL]. 默认刊物名称, 2025.
MA Yongfu, BAO Zhenghong, REN Jiyun, et al. Study on contact characteristics and melting mechanism of inclined coil spring contact[J/OL]. Moren journal, 2025.
摘要
斜圈弹簧触头烧熔的故障频发，对电力行业安全生产造成了较大影响。文章介绍两起GIS母线斜圈弹簧触头烧熔故障，通过解体检查与检测分析，发现故障前触头座和导体间存在偏心受力，据此开展了基于电接触理论的触头接触特性和温升分布规律研究，并搭建电-力-热多物理场耦合仿真模型进行了量化计算。结果表明，正常运行状态下触头整体温升较低且分布均匀，最大温差仅为0.9 K；长期运行后触头座与导体间出现偏心受力，触头整体温升增加，弹簧正下方因导热面积小而积聚热量，局部温升高达368.4 K，最终造成触头烧熔。提出触头结构改进措施并经实践验证，进一步得到了弹簧圈只能通流不能承重的关键结论。研究结果对斜圈弹簧触头异常发热机理分析及触头结构优化设计提供技术参考。
Abstract
The burning fault of the inclined coil spring contact occurs frequently
which has a great impact on the safety production of the power industry. This paper introduces two GIS bus inclined coil spring contact melting faults. Through disassembly inspection and detection analysis
it is found that there is an eccentric force between the contact seat and the conductor before the fault. Based on this
the distribution law of contact characteristics and temperature rise of the contact is studied based on the electrical contact theory
and the electrical mechanical thermal multi physical field coupling simulation model is built for quantitative calculation. The results show that the overall temperature rise of the contact under normal operation is low and evenly distributed
and the maximum temperature difference is only 0.9 K; After long-term operation
there is eccentric force between the contact seat and the conductor
the overall temperature rise of the contact increases
the heat under the spring accumulates due to the small heat conduction area
and the local temperature rise reaches 368.4 K
which will cause the contact to burn. The improvement measures of contact structure are put forward and verified by practice
and the key conclusion that the spring contact finger can only carry current but not load is further obtained. The research results provide technical reference for the analysis of the abnormal heating mechanism of the inclined coil spring contact and the optimal design of the contact structure.
关键词
Keywords
references
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