直流空气断路器高海拔环境下电弧重燃现象及其抑制措施  

Arc Reignition and Its Suppression of DC Air Circuit Breaker in High Altitude Environment

作　　者：黄浩 李静[1] 彭世东 HUANG Hao;LI Jing;PENG Shidong(Key Lab of Special Electric Machine and High Voltage Apparatus(College of Electrical Engineering,Shenyang University of Technology),Shenyang 110870,China)

机构地区：[1]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1期6-12,共7页Electrical & Energy Management Technology

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

摘　　要：高海拔环境下直流空气断路器(DC ACB)在电弧开断过程中易发生重燃,导致开断失败的概率增加。为了抑制DC ACB高海拔开断时的电弧重燃,以轨道交通用车载DC ACB为研究对象,建立了二维磁流体动力学(MHD)仿真模型,分析了不同海拔下DC ACB中的电弧演变过程,通过增大横向磁场及设置“C”形栅片对其高海拔开断性能进行优化。结果表明增大横向磁场,2 km、3 km海拔下DC ACB不发生电弧重燃,但4 km、5 km海拔下发生电弧重燃。4 km、5 km海拔下,在增大横向磁场的基础上采用含“C”形栅片的改进灭弧室结构,能够使DC ACB在高海拔环境下成功开断。DC air circuit breaker(DC ACB)in high-altitude environments are prone to reignition during arc breaking,leading to an increased probability of failure.To suppress arc reignition during high-altitude breaking of DC ACB,the on-board DC ACB used in rail transit was focused,a two-dimensional magnetohydrodynamics(MHD)simulation model was established.The arc evolution process in DC ACB at different altitudes was analyzed,and their high-altitude breaking performance were optimized by increasing the transverse magnetic field and setting C-shaped splitter plates.The results show that increasing the transverse magnetic field can not cause arc reignition in DC ACB at altitudes of 2 km and 3 km,but arc reignition occurred at altitudes of 4 km and 5 km.An improved arc chamber structure with a C-shaped splitter plates was adopted on the basis of increasing the transverse magnetic field at altitudes of 4 km and 5 km,which can disconnect DC ACB in high altitude environments successfully.

关 键 词：直流空气断路器 高海拔 磁流体动力学 横向磁场 “C”形栅片 

分 类 号：TM561[电气工程—电器]