铁路信号电源高速切换装置的研究与设计

The Research and Design of High-Speed Signal Power-Supply Switch-Device for Railway System

针对铁路信号电源不间断供电的需求,提出了一种双电源供电系统切换装置的设计方案。切换装置由主电路、电压与电流检测单元、控制切换单元、数字信号控制器(DSC)及其控制软件组成。该装置采用DSC系统,通过采样、比较和判断,可对供电电源进行实时监测,并能在常用电源出现故障时,自动将电源输出切换到备用电源,以保证不间断供电。具有检测精度高,误操作率低,可靠性高以及切换迅速等特点。

Aimed at the need of railway signal power supply without any break, this paper puts forward an optimized conception dealing with automatic switching apparatus designed for double power supply system. A switching apparatus consist of main circle, detect and switch unit, and the design of control software. When power off occurs, the apparatus can automatically transfer the customer electric circle to the standby power supply, thus keeping the customer power supply still working without a break. The apparatus is characterized by high detect sensitivity, low false operation rate, high reliability and switch speed.