变电站通信网络实时性能仿真分析

Analysis of Realtime Performance of Communication Network in Substations

采用动态仿真建模技术对变电站层嵌入式以太网的实时性能进行了详细分析。首先分析了 报文端对端传递时延的构成,揭示了报文传输的本质;其次系统地分析了变电站中数据流的分布, 根据统计特征建立了各类数据流的数学模型。考虑变电站通信网络数据流的分布特点和信息到达 规律,采用动态仿真方法具体研究了变电站层嵌入式以太网的平均时延、最大时延等链路时延指 标。最后进一步分析了TCP/IP协议的开销对报文端对端传递时延的影响。

This paper analyses the real-time performance of embedded Ethernet in station level by dynamic simulation. Firstly, the end-to-end delay of message is studied. The distribution and characteristic of data flow within substations are studied systemically, and subsequently the mathematical models of different kinds of data flow within substation are developed according to their statistical characteristics. Then a D2 substation communication network simulation model is built. Considering the message inter-arrival rule, the average and maximum link delay of embedded Ethernet in station level is studied thoroughly by simulation. After that, the influence of offload of TCP/IP protocol on message end-to-end delay is surveyed.