配电网智能开关循环式远动规约CDT的设计

The design to the revolving far move code CDT for smart switch in distribution network

配电网智能开关通信系统采用RS485总线,适合与采用循环式远动规约CDT的上位机或主站系统实现通信,以固定的传送速率循环不断地向调度端发送遥测、遥信、数字量、事件顺序记录等数据。根据循环式远动规约CDT的定义以及配电网智能开关采集信息的种类和特点,对循环式远动规约CDT进行简化,根据配电网的特点,对开关操作取消遥调功能,完整地设计了配电网智能开关与上位机通信的循环式远动规约CDT协议,数据传输过程中采用了8位CRC循环检验码进行校验,避免由于线路噪声或其他的干扰使信息码产生错误,最后采用C++程序设计语言实现了该通讯协议。

The smart switch in distribution network communication system, which is suitable to communicate with PC or monitor system that adopted the revolving far move code CDT, taken the RS485 as the bus. It sends data of telemetry, telesignalisation, digital quantity,and the order of events record to the scheduling end endlessly with a firm transmission rate. Considering the definition and simplification of the revolving far move code CDT,and the types and characteristics of the information gathered by distribution network smart switch, this paper completely designs a revolving far move code CDT agreement for the communication between the PC and the distribution network smart switch, which gets off the distribution network＇s remote control function according to its characteristics. 8 CRC circulation check codes for the information code are selected during the data transmission in order to avoid mistakes by line noise or others. At last,it achieves this agreement by C＋＋ programming language.