反应堆仪控HA设备冗余状态监测  

Redundant state monitoring of the HA devices in reactor I&C system

作　　者：张宁[1,2] 汪全全[1,3] 郭冰[1,2] 孙雪静[1,2] 徐海霞[1,2] 陈永忠[1,2] 

机构地区：[1]中国科学院上海应用物理研究所嘉定园区,上海201800 [2]中国科学院核辐射与核能技术重点实验室,上海201800 [3]中国科学院大学,北京100049

出　　处：《核技术》2015年第4期74-79,共6页Nuclear Techniques

基　　金：中国科学院战略性先导科技专项(No.XDA02010300)资助

摘　　要：为了解冗余配置的高可用性(High Availability,HA)设备内部冗余单元的运行状态,以避免由于切换或冗余失效导致的严重后果或潜在风险,对基于EPICS(Experimental Physics and Industrial Control System)仪控系统样机中冗余配置的可编程序控制器(Programmable Logic Controller,PLC)和组件进行了冗余状态监测方法研究。通过修改输入/输出控制器(Input/Output Controller,IOC)冗余组件代码及开发PLC状态变量读取程序的方法,分别获取到二者的冗余单元状态并发布在监控层终端。实验证明此方法在几乎不增加系统资源的情况下可长期监测冗余单元状态,为进一步提高仪控系统的可用性提供技术支持。Background： Redundancy configuration is widely adopted in the digitalized instrumentation and control （I＆C） system of third-generation reactors. For further availability improvement, state monitoring method of redundant configured Programmable Logic Controller （PLCs） and Input/Output Controller （IOC） components in Experimental Physics and Industrial Control System （EPICS） based I＆C system prototype was studied for the Thorium Molten Salt Reactor （TMSR） project. Purpose： In order to avoid serious consequence or potential risks caused by switch-over or redundancy failure, the running states of redundant units composed high availability （HA） devices in reactor I＆C system are expected to be accessed in real-time in this study. Methods： By means of adding the unit state reporting channels which could be transferred into Process Variables （PVs） for the acquisition of EPICS upper tier application, a novel method of monitoring redundant states of device units was developed. Source code of redundant monitor task （RMT） was modified by adding a routine to record state-related information for the IOC pairs whilst a new state-read program block for local and remote units was developed for PLCs. All state monitoring related variables was acquired and passed into EPICS records by IOC driver. In terminal layer, a CSS （Control System Studio）-based OPI （Operator Interface） Plug-In was implemented for on-line state monitoring. Results： Redundant state-related information of each unit pair were successfully acquired as PV values and showed in the designed OPI interface by proposed method. Test proved it could achieve real-time monitoring of redundant state variation. Conclusion： By developing and modifying program for HA units, and designing OPI interface, reactor I＆C system could monitor redundant unit state for a long-term with few additional system resources. It could provide technological support for further improvement of availability of the reactor I＆C system.

关 键 词：冗余 分布式控制系统 EPICS 高可用性 状态监测 

分 类 号：TL362.5[核科学技术—核技术及应用]