27．5kV永磁机构真空断路器动作特性仿真与试验研究

Simulation and Testing of Operating Characteristic of 27.5 kV Vacuum Circuit Breaker with Permanent Magnetic Actuator

针对27.5kV永磁机构真空断路器并根据其动作特点,进行了基于Ansoft和Matlab软件的静态、动态特性仿真。首先,建立有限元模型,利用Ansoft软件包对永磁机构的静态特性进行仿真。其次,根据耦合电压平衡方程和达朗贝尔机械运动特征方程,在静态仿真基础上采用Matlab构建永磁机构断路器的运动模型,对永磁机构动铁心、断路器动触头运动特性进行了仿真分析。最后,对设计的样机进行了动态测试,测试结果表明仿真的正确性。

Aiming at the permanent magnetic actuator of 27.5 kV vacuum circuit breaker and in accordance with its operating characteristics, simulations of static and dynamic characteristics were developed on the basis of Ansoft and Matlab softwares. Firstly, a finite element model was established to obtain the static characteristics of the permanent magnetic actuator via Ansofi software package. Next, coupling voltage balance equation with D＇Alembert＇s mechanical movement characteristic equation, movement models of the circuit breaker with permanent magnetic actuator were constructed using Matlab package on the basis of static simulation, thus the movement characteristics of permanent magnetic actuator＇s dynamic core and circuit breaker＇s dynamic contacts were simulated and analyzed. Finally, a testing device was designed and an experiment was conducted in order to verify the simulation. The results show that the simulation coincides well with the experiment.