利用电弧动态数学模型的低压断路器开断过程仿真分析

低压断路器开断过程仿真的关键内容是如何建立开断过程的电弧数学模型，并将其与其它开断过程的物理现象相耦合。通过对虚拟样机软件ADAMS进行二次开发，将电弧动态数学模型应用到低压断路器的开断过程仿真，并结合有限元软件ANSYS，建立了耦合复杂机械运动﹑电路﹑磁场和电弧数学模型的低压断路器开断过程仿真模型。通过将建立的仿真模型应用到一带双向斥开触头系统的塑壳断路器，研究了静触头压力大小对该塑壳断路器开断性能的影响。实验结果表明，利用所提出的仿真模型研究低压断路器的开断过程是可行的。

Simulation of the Interruption Process of Low Voltage Circuit Breaker Using Dynamic Mathematic Arc Model

The key issue in the simulation of the interruption process of low voltage circuit breaker is how to establish the mathematic model of the electric arc and couple it with other physics phenomena in the breaker’s interruption process. By carrying out second-development of virtual prototype software ADAMS, the dynamic mathematic arc model is successfully applied to the interruption process simulation of low voltage breaker. Combing with the FEM program ANSYS, a set of differential equations describing the coupling of complex mechanical movement, electric circuit, magnetic field and dynamic mathematic arc model was constructed. The simulation model was applied to a molded case circuit breaker (MCCB) with double repulsive contacts structure to analyze influence of the static contact force on the breaker’s interruption performance. Experiment validation was carried out for the simulation. It demonstrates that the proposed method is effective and capable of simulating the interruption process of the low voltage circuit breaker.