基于虚拟局域网的智能变电站热备份通信

Hot-standby communication of VLAN-based smart substation

虚拟局域网(VLAN)技术可提高智能变电站过程层网络通信实时性与安全性。为减小中心交换机的通信压力,针对跨交换机通信,设计了带热备份路由协议(HSRP)的双中心交换机通信方案。在仿真和实验中将添加了热备份路由协议的双交换机网状拓扑与传统单交换机星形网络拓扑结构进行对比,结果表明,采用双中心交换机热备份后,过程层网络中心交换机压力明显减小,并可以在链路发生故障时由备份交换机承担相应的数据通信任务,提高了智能变电站通信网络的可靠性。

The real-time performance and security of process-level network communication in smart substation can be improved by the application of VLAN（Virtual Local Area Network） technology. A scheme of dual-switch communication with HSRP（Hot-Standby Router Protocol） is designed for the multi-switch communication to reduce the communication load of central switch and its mesh topology is compared with the star topology of single-switch communication in simulation and experiment,which show that,the central switch load of process-level network in the proposed scheme is obviously reduced and the standby switch can take over the corresponding data communication task when fault occurs in the link,which improves the reliability of smart substation communication network.