基于双信号检测及跟踪的真空断路器永磁机构控制方法研究

Research on the Control Method of Vacuum Circuit Breakers with Permanent Magnet Actuator Based on the Detecting and Tracking of Signals

为了提高真空断路器永磁机构同步操作能力,有效抑制电力系统暂态过程。在断路器操作过程中,对多传感器输出信号进行检测,并采用双闭环PID控制方法对永磁机构进行控制,实现对目标参考触头行程、激磁线圈电流曲线的跟踪。以12 kV真空断路器单稳态永磁机构为控制对象,研制了以数字信号处理器(DSP)为核心的操作控制系统。结果表明控制系统采用上述控制方法,能够有效控制永磁机构触头行程与线圈电流,使触头运动特性处于受控状态,提高了控制系统的鲁棒性及控制精度,实现断路器关合时间误差在±0.3 ms以内,为同步关合的实际操作奠定基础。

In order to improve the performance of vacuum circuit breakers with permanent magnet actuator （PMA）, restrain the transient process of power system effectively. During the process of VCB operation, system based on DSP is designed. The results show that the control system designed with the new control method could effectively control the contact travel and current in excitation coil, ensure the characteristics of the contact in a controlled state, and improve the robustness and accuracy of the control system, and the closing time error of VCB within ＋0.3 ms, lay the foundation for application of synchronous switching.