基于ModBus协议的核电厂KRT与DCS通信改进研究及应用

摘要

The network communication scheme between KRT and DCS in CPR1000 project in nuclear power station is intro-duced,and the problems existing in system operational process are presented. By analyzing the communication structure of KRT and DCS,a solution to add life signal and combine it with message mechanism of ModBus protocol exceptional response is pro-posed. The functions of automatic detection and redundancy switching when the data communication between KRT and DCS was abnormal were realized. The improved solution scheme has successfully solved the data communication problem between KRT and DCS by implementing and applying in CPR1000 project.%介绍了CPR1000项目核电站KRT与DCS系统的网络通信方案以及在系统运行过程中遇到的问题.通过对KRT与DCS系统通信结构的分析,提出了增加生命信号与ModBus协议异常响应报文机制相结合的改进处理方案,实现了KRT与DCS系统数据通信异常时的自动检测与冗余切换功能.该改进处理方案通过在CPR1000项目上的实施与应用,成功解决了KRT与DCS系统的数据通信问题.