铁路自动配电开关分层式通信系统的实现

DKHK型铁路贯通/自闭线配电开关自动化系统是采用改进的故障定位算法来实现线路故障定位和报警,本文的研究是为了实现该系统的远距离通信问题。该通信系统采用2级通信,在每个区域中,由一个工控机组成最上层,中间层由几台PC104组成,每台PC104管理10台左右的下位机。上层工控机与PC104之间采用CAN总线协议,PC104和下位机之间采用RS485通信协议。在系统装置(FTU)数量大,分布地域广的基础上实现大量数据远距离传输的完整和准确、实时性高、按故障优先级别来传输信息。各通信设备之间独立运行,彼此之间只由通信网络联系,部分设备故障不影响其它设备的正常运行,也不会降低速度。

Design of layered communication system in railway automatic power distribution switches system

The DKHK-type railway automatic distribution switches system adopts improved algorithm to detect and locate the fault of the power line.The paper describes a communication system based on data of auto-distribution switches in this DKHK system. This communication system has two-stage communications.In every area,there are 1 set of industrial computer which forms the top layer,several sets of PC104 which form the middle layer,about 10 sets of lower computer which belong to every PC104.CAN bus protocol is adapted between the industrial computer and PC104,RS485 protocol is adapted between the PC104 and lower computer.There are lots of FTUs which are locating in all around.This system realizes the remote communication information integrity,nicety,speediness and priority.All of the communication devices work independently.They are connected by the communication net.So some devices which are fault will not affect others and the speed will not reduce.