基于IEC 61850-9-2的变电站通信网络仿真

The Simulation of Substation Communication Network Based on IEC 61850-9-2

以太网的通信能力是支撑基于IEC 61850标准的数字化变电站正常运行的重要因素。文中围绕全站统一环形网和星形网,采用仿真软件OPNET对变电站的各种典型数据流建模,采样值采用IEC 61850-9-2协议,考虑星形和环形2种网络结构、网络带宽、过程层网络传输采样值、环网断线故障、文件传输对采样值与跳闸报文的影响等因素,制定了多套仿真实验方案,针对一个实际的中型变电站进行了对比仿真实验与分析,为数字化变电站系统的构建提供一定的参考。

The communication capability of Ethernet is a key for normal operation of digital substation automation system based on IEC 61850.Aiming at the united ring and star networks in whole substation,the simulation software OPNET is adopted to construct the mathematical models of various typical data flow in this paper.IEC 61850-9-2 protocol is used to transfer the sampling values.A variety of simulating test schemes are made,which consider following factors such as：structure and bandwidth of network,the different transferring of sampling values by the process network,the breaking failure of the ring network,the influence of file transferring on the sampling values and tripping message.The results of simulating experiments for an actual medium-size substation are given.It provides a reference for construction of a digital substation system.