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核技术 2015

基于PRP协议的EPICS冗余技术

DOI: 10.11889/j.0253-3219.2015.hjs.38.040401, PP. 40401-40401

刘少海,陈永忠,韩利峰

Keywords: 并行冗余协议,核电,EPCIS,网络冗余,可靠性

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Abstract:

冗余技术是提高EPICS(ExperimentalPhysicsandIndustrialControlSystem)在核电领域应用可靠性的有效解决方案。不同于当前采用的“热备用”冗余模式，本文借鉴IEC62439-3标准所发布的并行冗余协议(ParallelRedundancyProtocol,PRP)阐述的“并行”冗余模式，分析了该协议的应用层实现方案用于EPICS系统的可行性，并参照EPICS的通道访问协议(ChannelAccess,CA)，在Linux系统下开发了基于PRP的EPICSCA协议软件。测试表明，基于PRP应用层协议方案的EPICSCA协议，在网络单点故障时可以实现无缝切换的高可靠性要求，为提高核电领域EPICS系统的通信网络可靠性，提供了实现方式。

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