SF_6中磁驱动电弧主要参数的数值计算和分析  

The Calculation and Analysis of Main Parameters for SF_6 Arc Driven by Magnetic Field

作　　者：郭文元[1] 郭光辉[1] 

机构地区：[1]西安交通大学

出　　处：《电工技术学报》1997年第1期6-10,共5页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金

摘　　要：由于SF_6自能灭弧原理的发展和深入研究,用数学模型描述这过程日趋需要。但是,这种灭弧装置在储能蓄压阶段采用了磁驱动电弧的换能方式,即弧柱是在横向气体吹拂中运动,因此其物理过程的描述将不同于喷口电弧的方法,某些方面比纵吹喷口电弧更为复杂。本文在描述此过程的基础上,进行合理的假设和简化,根据弧柱在磁场中受力平衡,弧柱中能量平衡方程和欧姆定律等,求解了储能蓄压阶段中的一些主要参数,例如温度分布、速度变化和压力增加等。讨论了瞬态电弧能量利用系数。试验所测得的压力变化进一步验证了计算的合理正确性。As the further development and research of SF_6 self-energy arc quenching, the description of the arc quenching process is in quite request. In this process the arc column driven by magnetic field rotates in SF_6 gas flow, and transfers its energy to surrounding SF_6 gas during energy storage. So, this process is not the same as that of the nozzle arc, some aspects are even more complicated than those of the nozzle arc. In this paper, the description of physical process, reasonable and simplified assumptions are given. After analyzing the force of magnetic field on the arc column, using energy conservation, Newton's convective equation and Ohm's law etc, the main parameters are calculated. The instantaince utilzation coefficients of arc energy is calculated as well. The measuring results of pressure confirms the reasonability of this calculation further.

关 键 词：六氟化硫 自能式灭弧室 电弧 数值计算 

分 类 号：TM213[一般工业技术—材料科学与工程]