数字化变电站通信网络冗余技术

介绍了IEC62439标准中的几种典型的网络冗余技术,包括跨网冗余协议(CRP)、分布冗余协议(DRP)、媒介冗余协议(MRP)、信标冗余协议(BRP)、并行冗余协议(PRP)和高可用性无缝冗余协议(HSR).CRP支持单网和双网冗余,通过2个端口跨接到1个或2个独立的网络中实现冗余.DRP是基于环网拓扑的冗余模式,在...

Redundancy technique of digital substation communication network

Several typical network redundancy techniques stipulated in IEC62439 standards are introduced:CRP(Cross-network Redundancy Protocol),DRP(Distributed Redundancy Protocol),MRP(Media Redundancy Protocol),BRP(Beacon Redundancy Protocol),PRP(Parallel Redundancy Protocol) and HSR(High-availability Seamless Ring). CRP supports mono-/dual-network redundancy,connecting with one/two independent networks via two ports. DRP is based on the ring topology and implemented in switch. MRP recovers the communication of ring network within a defined time when a single failure occurs in link or switch. BRP redundant network is composed of two interconnected top switches,each linking a star/line/ring subnet. PRP realizes the dual sending and receiving of message at LRE in end node. HSR network consists of the switching end nodes arranged in a ring,each having two ports. Comparison shows that,PRP/HSR is the ideal solution of network redundancy in applicability,adaptability and failure recovery.