基于OPNET的智能变电站过程层网络建模方法

Modeling Method for Process-Level Network in Smart Substation Based on OPNET

智能变电站过程层网络的性能,会直接影响继电保护等高实时性应用的有效实现。为了定量研究过程层网络的可靠性和实时性,提出了一种基于OPNET的过程层网络建模方法。根据过程层网络设备结构、报文种类及流量特征,搭建了合并单元、智能终端、保护测控装置等各智能电子设备(IED)模型。在此基础上,建立了每个间隔模型;并以D2-1型变电站为例,采用星型拓扑组建了过程层网络模型。最后以组建的网络模型为平台,开展了虚拟局域网(VLAN)划分方式的研究,仿真及测试结果说明了模型的有效性。

The accomplishment of some time-critical application in smart substation, such as relay protection, is determined by the performance of process-level network. An OPNET based modeling method for process-level network is proposed in order to evaluate network reliability and real time characteristic quantitatively. According to device structure, packet classification and flow characteristic, models of different kinds of intelligent electronic device （IED） including merging unit, intelligent terminal and protection device are built. Then model of each bay is created based on IED model. Model of process-level network is also established using star topology group method. Finally, study of Virtual Local Area Network is conducted on the established platform. Simulation and testing results demonstrate validity of proposed model.