Study on contact characteristics and melting mechanism of inclined coil spring contact

MA Yongfu; BAO Zhenghong; REN Jiyun; Wang Lili; WANG Zhihui; CHEN Yao

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Study on contact characteristics and melting mechanism of inclined coil spring contact

更新时间：2025-04-18

- Study on contact characteristics and melting mechanism of inclined coil spring contact
- Moren Journal (2025)
- 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：
- 基金信息：
  
  Technology project of State Grid Qinghai Electric Power Company(522807240002)
- DOI：
  CLC：
- Received：02 February 2025，
  
  Revised：18 February 2025，
  
  Accepted：03 March 2025，
- 稿件说明：
移动端阅览
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.
DOI：

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. DOI：

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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