报告详情
Interruption Transient Characteristics and Engineering Application Technology of 12 kV Expulsion Fuses
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更新：2026-03-23 16:25:56 浏览：66次
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摘要
To enhance the protection reliability of equipment in advanced distribution systems under conditions of increased short-circuit current levels, this paper investigates the arc-extinguishing mechanism and engineering application of 12 kV expulsion fuses. First, a multi-physical field coupled simulation model of the fuse is established, revealing that the arc-extinguishing mechanism relies on the thermal decomposition of the gas-evolving coating on the inner wall of the fuse holder, which generates a pressure difference that drives a high-speed airflow to extinguish the arc. Second, the influence of key structural parameters, such as the length of the arc-shortening rod and the inner diameter of the fuse holder, on the pressure, velocity, and temperature distribution during the arcing process is analyzed through simulation. Furthermore, the structural stress during the fuse interruption process is examined, identifying the stress concentration regions and the withstand capability of critical components. On this basis, a full-scale distribution network test platform is established to conduct high-capacity short-circuit tests. The simulation and experimental results are in good agreement. Finally, integrating experimental data with standard requirements, a protection coordination method between fuses and transformers, along with principles for fuse element selection, is proposed. The research outcomes provide theoretical foundations and engineering guidance for the structural optimization, standardized design, and reliable application of expulsion fuses in distribution networks.
关键词
Arc-extinguishing mechanism,Multi-physics field simulation,Full-scale test,Fuse selection principle,Expulsion fuses
报告人
Luming Xin
tester Liaoning Electric Power Research Institute稿件作者
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重要日期
-
会议日期
10月25日
2026
至10月27日
2026
-
09月15日 2026
初稿截稿日期
主办单位
Xi’an Jiaotong University
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