CAJ | 학술논문

纵向磁场对阳极活动的控制效果对于大电流真空电弧成功开断十分关键。采用建模仿真的方法，分析不同纵向磁场强度对阳极活动的影响。基于大电流真空电弧模型，仿真得到不同纵向磁场强度下输入阳极的能流密度分布，并以此作为阳极活动模型的边界条件，得到不同磁场强度下的阳极熔化、蒸发情况。仿真结果表明：对于工频电流（50Hz）电弧，阳极温度的最大值出现7ms时刻附近；随着纵向磁场的增大，阳极表面温度、饱和蒸汽压、阳极蒸汽流量都相应减小；随着纵向磁场的增大，熔化半径增大，但是熔化深度减小，改善了阳极的烧蚀情况。
종향자장대양겁활동적공제효과대우대전류진공전호성공개단십분관건。채용건모방진적방법，분석불동종향자장강도대양겁활동적영향。기우대전류진공전호모형，방진득도불동종향자장강도하수입양겁적능류밀도분포，병이차작위양겁활동모형적변계조건，득도불동자장강도하적양겁용화、증발정황。방진결과표명：대우공빈전류（50Hz）전호，양겁온도적최대치출현7ms시각부근；수착종향자장적증대，양겁표면온도、포화증기압、양겁증기류량도상응감소；수착종향자장적증대，용화반경증대，단시용화심도감소，개선료양겁적소식정황。
The controlling effects of axial magnetic fields （AMFs） on anode activities are critical for successful interruptions of high-current vacuum arc. In this paper, based on modeling and simulation, influence of different AMFs on anode activity was analyzed. Heat flux densities to anode under different AMFs were obtained from high-current vacuum arc model, and which were considered as the boundary conditions of anode activity model, anode melting and evaporation under different AMFs can be simulated. Simulation results show that for power frequency current arc （50 Hz）, the maximum anode temperature will be appeared after around 7ms. With the increase of AMFs, anode surface temperature, saturated vapor pressure and vapor flux all decreased. With the increase of AMFs, anode melting radius increased, otherwise, melting depth decreased, anode erosion was improved.