智能变电站过程层网络报文与流量分布计算方法

报文与流量分布的定量计算不仅能够对过程层网络组网方案进行评价，为设备选型提供量化依据，也能为网络异常保护提供判据和阈值整定。提出了过程层网络报文的描述与计算模型，包括过程层网络报文传输路径模型，设备输入流量计算模型，链路流量计算模型等。模型描述了过程层网络报文的整个传输行为，利用该模型能够在提取SCD文件中必要的计算要素的基础上，实现报文与流量分布的自动计算。并以典型110 kV变电站的过程层网络为例，并结合OPNET仿真对比，验证了该模型和方法的有效性。最后基于报文与流量计算方法，给出了网络异常保护的实现思路。

Calculation of distribution of message and traffic load for process bus network in smart substation

Quantitatively accurate calculation of the distribution of message and traffic load can not only evaluate the network scheme and provide a quantitative basis for equipment selection, but also for network anomaly monitoring protection criterion and threshold tuning. This paper presents a process bus network message model, including the message transmission path model, equipment input flow calculation model and the traffic load of links calculation model. These models describe the transmission behavior of the messages, and based on the SCD file analysis, the information flow calculation method can be achieved automatically. Finally, it takes the process bus of a typical 110 kV substation network as an example combined with OPNET simulation comparison to verify the validity of the models and methods in this paper.