模拟低压限流断路器开断特性的数值方法及其应用  

A Numerical Method to Simulate the Interruption Process in Low Voltage Limiter-Circuit Breaker and its Applications

作　　者：除德桂 曹庆荣 万绍尤[2] 贺相福 姜立[2] 

机构地区：[1]西安交通大学 [2]上海电器科学研究所

出　　处：《电工技术学报》1992年第3期40-46,共7页Transactions of China Electrotechnical Society

基　　金：机械电子部科研基金;高等学校博士学科点专项科研基金

摘　　要：本文提出一种用以模拟低压断路器开断特性的数值方法,它把开断过程分为快速机构动作、电弧停滞、电弧运动和熄弧等几个阶段。在机构动作过程中,采用了磁场、瞬态电路和机械运动方程相耦合的求解方法,计算中考虑了触头间的电动斥力和热脱扣器及其它元件的内阻,电弧数值模型基于实验,这些都导致开断过程计算结果和实测结果比较一致。文中还介绍了提出的模拟方法在预测断路器限流特性、选择最佳结构参数及开断波形数值分析方面的应用。A new method to simulate the interruption process in low-voltage limiter circuit breaker is presented, which Subdivided the whole process into mechanism operation phase, immobility phase, arc elongation phase and quenching phase. The calculation of magnetic field coupled with transient electrical circuit and mechanical moving equations is considered in mechanism operating stage. The electrodynamic repulsive force and impedances of thermal trip and all other elements in circuit breaker are taken into account in calculation. The numerical model of arc is based on testing, all of those cause that the calculating results shows good agreement with testing results. The applications of the method proposedto predict the current limiting performance, select optimal design Daremeters and analyse the interrupting waveforms are also introduced.

关 键 词：计算机 限流特性 低压 断路器 

分 类 号：TM561[电气工程—电器]