典型文献
Research on arc root stagnation when small current is interrupted in self-excited circuit breaker
文献摘要：
The self-excited DC air circuit breaker(SE-DCCB)has been widely used in urban rail transit due to its excellent stability.It can realize forward and reverse interruption,but has difficulty interrupting small currents due to the phenomenon of arc root sticking at the entrance of the arc chamber in the splitting process,which is known as arc root stagnation.A coupling model of the self-excited magnetic field and magnetohydrodynamics is established for the SE-DCCB with the traditional structure.The magnetic field,temperature and airflow distribution in the arc chamber are investigated with an interrupting current of 150 A.The simulation results show that the direction and magnitude of the magnetic blowout force are the dominant factors in the arc root stagnation.The local high temperature of the arc chamber due to arc root stagnation increases the obstruction effect of the airflow vortex on the arc root movement,which significantly increases the arc duration time of small current interruption.Based on the research,the structure of the magnetic conductance plate of the actual product is improved,which can improve the direction and magnitude of the magnetic blowout force at the arc root so as to restrain the development of the airflow vortex effectively and solve the problem of arc root stagnation when the small current is interrupted.The simulation results show that the circuit breaker with improved structure has a better performance for a small current interruption range from 100 A to 350 A.
文献关键词：
中图分类号：
作者姓名：
Shidong PENG;Jing Li;Yundong CAO;Chongyang HUANG;Shuxin LIU
作者机构：
Key Lab of Special Electric Machine and High Voltage Apparatus(College of Electrical Engineering,Shenyang University of Technology),Shenyang 110870,People's Republic of China
文献出处：
引用格式：
[1]Shidong PENG;Jing Li;Yundong CAO;Chongyang HUANG;Shuxin LIU-.Research on arc root stagnation when small current is interrupted in self-excited circuit breaker)[J].等离子体科学和技术（英文版）,2022(11):14-25
A类：
blowout
B类：
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AB值：
0.39652
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