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网络通信中的网络冗余协议,如快速生成树协议(Rapid Spanning Tree Protocol,RSTP),在网络发生单点故障时其可靠性需进一步提高才能用反应堆数字化仪表与控制系统中。本文介绍了应用于智能变电站的IEC62439-3标准所发布的并行冗余协议(Parallel Redundancy Protocol,PRP),分析了该协议实现高可靠性和高可用性的原理,并在Linux网络协议栈应用层开发了基于TCP/IP的PRP协议软件。测试表明,在应用层实现PRP协议的方案可行,可以达到零自愈和零丢包的高可靠性要求,为提高反应堆仪控系统控制网络的可靠性提供了参考思路和实现方式。
Network redundancy protocols in network communications, such as the Rapid Spanning Tree Protocol (RSTP), can be used in reactor digital instrumentation and control systems when there is a single point of failure in the network. This paper introduces the Parallel Redundancy Protocol (PRP) released by the IEC62439-3 standard applied in smart substations, analyzes the principle of high reliability and high availability of the protocol, and develops the application protocol in the Linux network protocol stack application layer Based on TCP / IP PRP protocol software. The test shows that the scheme of implementing PRP protocol at the application layer is feasible, which can meet the high reliability requirements of zero self-healing and zero packet loss, and provide reference ideas and ways to improve the reliability of the instrumentation control system of the reactor.