电器与能效管理技术Issue(5)：16-22,7.DOI:10.16628/j.cnki.2095-8188.2019.05.003
直流熔断器小电流拖尾问题优化分析设计
Optimization Analysis Design of Small Current Tail Problem of DC Fuse
摘要
Abstract
DC fuses are widely used in the protection of power systems.However, for low overload current faults in the system, DC fuses are prone to excessive current tailing time, resulting in problems such as overheating, arcing and even explosion of fuses.Aiming at this problem, this paper established an arc mathematical model, analyzed the arcing process of the fuse and the difficulty of breaking in the case of low overload, and studied the influence of different narrow-band broadband ratio on the breaking result.Considering the zero-crossing time of the device is limited by the volume structure of the fuse shell, and the optimum 1:3.25 aspect ratio is determined.Finally, a certain type of rated DC fuse 800 V/300 A was used as the research object to verify the experiment.The experimental results show that when the aspect ratio is 1:3.25, the better breaking effect is obtained.The conclusions presented are of great significance for the optimal design of DC fuses and the protection of power equipment.关键词
直流熔断器/电弧模型/低过载电流/电流拖尾/过零时间Key words
DC fuse/arc model/low overload current/current tailing/zero-crossing time分类
信息技术与安全科学引用本文复制引用
王帅,庄劲武,胡鑫凯,毛启东..直流熔断器小电流拖尾问题优化分析设计[J].电器与能效管理技术,2019,(5):16-22,7.基金项目
自然科学基金项目 (51607184) （51607184）
