栅片式直流接触器开断电弧过程中的重击穿现象及成因研究  

Research on Arc Re-strike Phenomenon and Cause During DC Contactor with Splitter Plates Breaking

作　　者：赵艺凡 李静[2] 彭世东 ZHAO Yifan;LI Jing;PENG Shidong(State Grid Lanzhou New Area Power Supply Company,Lanzhou 730300,China;Key Lab of Special Electric Machine and High Voltage Apparatus(School of Electrical Engineering,Shenyang University of Technology),Shenyang 110870,China)

机构地区：[1]国网兰州新区供电公司,甘肃兰州730300 [2]特种电机与高压电器教育部重点实验室(沈阳工业大学电气工程学院),辽宁沈阳110870

出　　处：《电器与能效管理技术》2024年第8期27-33,共7页Electrical & Energy Management Technology

基　　金：国家自然科学基金资助项目(51977132);辽宁省重大科技专项资助项目(2020JH1/10100012);辽宁省教育厅面上资助项目(LJKZ0126)。

摘　　要：为了探究直流接触器产品开断过程中电弧重击穿的物理机理,在考虑非均匀磁场分布的情况下建立磁流体动力学(MHD)模型,发现不同铜蒸气浓度下的2种电弧重击穿现象,即栅片间电弧重击穿和触头间电弧重击穿。触头间电弧重击穿会显著增加电弧燃弧时间,在实际应用中应尽量避免。电弧重击穿现象的发生与灭弧室内的气流漩涡和动静触头间的气体流速差有关。研究结果可为直流接触器灭弧室的设计提供理论指导和定量数据参考。To investigate the physical mechanism of arc re-strike during DC contactor breaking,a magnetohydrodynanmic(MHD)model is established considering the inhomogeneous magnetic field distribution,and two kinds of arc re-strike phenomena were found under different copper vapor concentrations,including arc re-strike between splitter plates and arc re-strike between contacts.Arc re-strike between contacts will increase the arc duration significantly,so it should be avoided in the practical applications.The arc re-strike is related to the airflow vortex in the extinguishing chamber and the difference of gas velocity between the dynamic and static contacts.This study can provide the theoretical guidance and the quantitative data reference for the design of DC contactor.

关 键 词：直流接触器 栅片 电弧重击穿 铜蒸气 磁场 

分 类 号：TM572.1[电气工程—电器]