基于OPNET的变电站过程层网络的仿真研究

采用交换式以太网技术应用于变电站过程层网络通信,以代替传统点对点硬线电缆连接的信息传输方式。在对交换式以太网实时性能进行分析之后,以典型500 kV变电站内的线路间隔作为研究对象,将间隔内设备按照其所完成的功能分解为IEC 61850中定义的逻辑节点,并使各逻辑节点重新组合形成过程层以太网的节点。通过对节点间交换信息的分析,对网络负载进行了分类,根据其自身的特点设计了相应传输模型和流量模型。最后利用OPNET网络仿真分析软件验证了线路间隔内过程层以太网的网络性能,仿真结果表明过程层网络通信具有可行性。

Study on process-level network in substation using OPENT simulation

The switched Ethernet is applied in the communication network of substation process-level to replace the traditional point-to-point cable communication mode.After discussing the real-time performance of switched Ethernet,a line bay in the typical 500kV substation is chosen to study on.The equipments located in the line bay are decomposed into the logical nodes defined in IEC 61850 in reference to their different functions,and these logical nodes are reassembled as the network nodes of the process-level Ethernet.After the analysis of the information transmitted between the network nodes,the network load is classified,and the transmission modes as well as flow modes are designed according to their characteristics.Finally,the performance of the process-level Ethernet in the line bay is verified using OPNET network simulation software,and the result demonstrates the feasibility of the network communication in process-level.