摘要
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。
Background： Only the reliability of Rapid Spanning Tree Protocol （RSTP） and some other redundancy protocols is improved when a single-point failure occurs in the network, then the RSTP might be applied to control network of reactor＇s digital instrumentation and control system （I＆C）. The Parallel Redundancy Protocol （PRP） released in standard IEC62439-3 and applied to the intelligent power transducing station is proposed as a possible solution to provide completely seamless switchover in case of a single-point failure. Purpose： In order to fulfill all the high-reliability requirements of redundancy control network, the PRP is applied to the digital I＆C of nuclear reactor. Methods： The principle of achievable high reliability and high availability based on PRP are analyzed in detail, and a software implementation of PRP protocol has been developed based on TCP/IP over Linux in the application layer. Results： Test results show that the high reliability requirements of zero self-healing time and zero packet loss can be realized during the simple data transmitting experiments across the various network nodes. Conclusion： The PRP and the peoposed implementation plan can be employed to achieve high reliability control network for nuclear reactor＇s I＆C system.
出处
《核技术》
CAS
CSCD
北大核心
2014年第11期60-65,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
关键词
并行冗余协议
IEC
62439-3
数字化仪表与控制系统
控制网络
可靠性
Parallel redundancy protocol （PRP）, IEC 62439-3, Digital instrumentation and control system （I＆C）, Control network, Reliability
