基于并行冗余网络的数字化变电站通信网络构架

Communication network structure of digital substation based on parallel redundancy

为适应采用交换机网络进行通信对传输网本身可靠性提出的要求,介绍了IEC62439标准描述的高实用性自动网络通信协议。采用并行冗余协议进行网络构架。在站控层和间隔层之间采用环形双网,在间隔层和过程层之间采用星形双网。互备的双网同时运行,并在链路层实现冗余数据帧的处理。与传统互备组网方式所用规约进行了对比,指出了并行冗余方式的优越性。

To meet the requirement of switch-based transmission network for communication reliability, IEC62439 protocol is introduced and PRP（Parallel Redundancy Protocol） is adopted. Dual-ring networks are applied between station level and bay level,and dual-star network between bay level and process level. Two parallel redundant networks operate simultaneously and the redundant data frames are processed in link layer. The superiority of PRP over traditional redundancy protocol is introduced by comparison.