基于GMRP的变电站发布/订阅通信模型设计

Design of a Publish/Subscribe Communication Model Based on GMRP for Substation Communication

针对变电站通信的实时性要求,基于组播注册协议(GARP multicast registration protocol,GMRP)设计了适用于电力系统的发布/订阅(publish/subscribe,P/S)通信模型,描述了模型中各模块的功能,并结合IEC61850标准中面向通用对象的变电站事件(GOOSE)报文从系统配置、订阅和发布等方面对该模型的工作流程进行了详细阐述。结合实验数据对P/S模型的单播和广播方式进行了分析比较,指出基于GMRP的P/S通信模型不仅能满足变电站通信的网络时延要求,而且在系统数据流量大的情况下能增强实时性。

According to the requirement in real time performance of substation communication, on the basis of GARP multicast registration protocol （GMRP） a publish/subscribe （P/S） communication model suitable to power system is designed, the function of each module in this model is described, combining with GOOSE message in IEC 61850 the work flow of the proposed model is expounded in the aspects of system configuration, subscription and publication. Based on experimental data the unicast mode and multicast mode of P/S model are analyzed and compared. It is pointed out that the P/S communication model based on GMRP not only can meet the requirement in network delay of substation communication, but also can enhance real time performance under heavy traffic.