基于优先级标签的变电站过程层交换式以太网的信息传输方案

为了解决变电站过程层信息综合传输中的流量冲突问题,作者提出了基于优先级标签在网络端节点内控制信息传输的信息综合传输方案.通过采用IEEE 802.1标准中定义的用户优先级标签,为变电站过程层交换式以太网(SESPL)中不同类型的信息分配不同的优先级别,在交换机和端节点内分别采用先到达先服务(first-come-first-served,FCFS)和静态优先队列(static priority queuing,SPQ)调度算法实现.阐述了在网络端节点的网络协议栈中引入优先级机制的具体实现方法,并且以一个典型变电站馈线间隔模型为例进行仿真验证,仿真结果表明了该方案的有效性和可行性.

A TRANFER SCHEME BASED ON PRIORITY-TAG IN SWITCHED ETHERNET FOR SUBSTATION PROCESS-LEVEL

To solve the problem of flow collision of the integrative information transmission in substation process-level, a novel information transmission scheme in the end-nodes based on the priority-tag is proposed, in which different priorities are assigned according to different information types in switch Ethernet for substation process-level (SESPL) by using the user priority-tag field defined in the standard IEEE 802.1, and first-come-first-served (FCFS) and static priority queuing (SPQ) scheduling algorithms are used in the switch and end-nodes respectively. An implementation method through introducing a prioritization mechanism into the protocol stacks is presented. Case study on a typical substation feeder bay model verifies the validity and feasibility of the proposed scheme.