摘要
新型轨道交通牵引系统配电系统一般为直流供电制,其额定电压与电流一般为kV和kA级,因此作为配电系统中的关键元器件,各类直流大功率接触器的需求也进一步提升。制约产品发展的核心问题是直流大功率感性负载条件下接触器灭弧能力及灭弧速率。基于此,该文研究一种自吹弧式灭弧室的电弧特性。通过仿真给出灭弧室主触头流过不同直流电流产生的自吹弧磁场分布,对比分析阻性与不同时间常数感性负载下的分断电弧特性和燃弧能量。最终提出灭弧室内“磁场竞争模型”用以解释燃弧过程中的电压临界值和时间常数临界值现象。自磁场吹弧式灭弧室接触器具有分断高电压、大电流及大时间常数感性直流负载的能力,具有很强的实际应用价值和理论研究意义。
The distribution system of rail transit traction system is generally supplied by dc power,and its rated voltage and current are generally kV and kA levels.Therefore,as a key component of the distribution system,the demand for various types of DC high-power contactors is further and further.The core problem that restricts the development of the product is the arc extinguishing ability and the arc extinguishing speed of the chamber under the inductive load of high DC power.Based on this problem,arc characteristics of a self-blowing arc extinguishing chamber are studied in this paper.The distribution of the self-blowing arc magnetic field generated by the main contact flowing through different DC currents in the arc extinguishing chamber is obtained through simulation.The characteristics of the breaking arc and the energy of arc burning are compared and analyzed under the inductive load of different time constants and resistance.The contactor with self-blowing arc-extinguishing chamber has the ability to break the inductive DC load with high voltage,large current and large time constant,which has strong practical application value and theoretical research significance.
作者
周学
周雨馨
孙会超
翟国富
Zhou Xue;Zhou Yuxin;Sun Huichao;Zhai Guofu(Electrical Engineering and Automation Harbin Institute of Technology ,Harbin 150000 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2021年第S01期292-302,共11页
Transactions of China Electrotechnical Society
关键词
直流大功率接触器
电弧特性
灭弧室设计
直流牵引系统
DC high-power contactor
arc characteristics
arcing chamber design
DC traction system
