变电站继电保护数据流端对端实时性仿真研究

Simulation on end-to-end delay of protective relaying data flow in substation

利用动态仿真建模技术对变电站继电保护数据流端对端实时性进行了详细研究。分析了变电站继电保护数据流的分布特点和报文端对端时延构成;建立了变电站间隔层的继电保护设备和变电站层的本地监控设备之间的数据通信仿真模型;具体研究了不同网络配置下的继电保护数据流端对端时延,指出数据帧大小和发送间隔,链路背景利用率,高层协议等是影响实时性的主要因素,给出了详细的分析结果,提出了有利于减小继电保护数据流端对端时延的网络配置方案。

The end-to-end delay of protective relaying data flow in substation is studied using dynamic simulation modeling technology. The distribution characteristics of protective relaying data flow and the constitution of the end-to-end delay of messages are analyzed. The simulation model for digital communication between protective relaying equipments and monitoring equipments of interval layer is suggested. The end-to-end delay of protective relaying data flow in different network configurationsis analyzed. It is found that the size and interval of data frame, utilization of link background and protocols of higher layer are the main factors of real-time performance. The detailed analysis results are presented. A proposal for network configuration is suggested to reduce the end-to-end delay of protective relaying data flow.