摘要
电弧是机械式开关电器在分/合过程中的重要物理现象,直接影响其通断能力。根据内部物理过程建立电弧模型进行仿真分析,是开关电器领域的重要研究手段。综合考虑CO2电弧等离子体中的温度和电磁场的耦合关系,建立了CO2电弧的二维轴对称磁流体动力学模型,利用数值方法进行求解,得到可拆卸气体灭弧室中的CO2自由燃烧直流电弧特性。仿真结果表明,CO2气体压力一定时,随着电流增大,电弧温度增加、电弧半径和电弧电压增大;电流数值一定时,随着CO2气体压力增大,电弧半径和电弧电压增大、电弧温度降低。通过与相关文献中的仿真和试验结果对比,验证了所建立的CO2电弧模型的正确性。
According to the internal physical process to build an arc model and to simulate and analyze the arc model, that is an important research means for switching appliance.This paper,considering the coupling relationship of flow field,heat field and electromagnetic field in CO2 arc plasma,established 2 D axisymmetric MHD model,and using numerical method to solve it and obtained CO2 DC arc characteristics in removable gas arc extinguishing chamber.The simulation results show that when the gas pressure is fixed,with the increase of current,the arc temperature,radius and voltage increase;when the current value is fixed,with the increase of CO2 gas pressure,arc radius and voltage increase,the arc temperature decreases.The comparison of the simulation in relative reference and the experimental results verifies the correctness of the model.
作者
樊诗诗
韩璐瑶
管臣
闫静
耿英三
FAN Shishi;HAN Luyao;GUAN Chen;YAN Jing;GENG Yingsan(State Key Lab of Electrical Insulation for Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《电器与能效管理技术》
2019年第9期1-5,共5页
Electrical & Energy Management Technology
基金
国家重点基础研究发展计划(973计划)(2015CB251002)
