Development of a mobile network scanner-analyzer of the local area network of a digital substation for the analysis of flows of the IEC 61850 standard to improve the reliability of a digital substation

This article presents the process of developing a mobile network scanner of information flows of the IEC 61850 standard for use at a digital substation. The network scanner is an autonomous device that must be connected to the local computer network of a digital substation to perform network analysis. The network scanner receives power from the network equipment of the digital substation. The scan results are provided using a Wi-FI network generated by the scanner itself. The user needs to connect to the scanner's Wi-FI network and use the scanner's functions using the user interface: analysis of SV (Sampled Values) streams and GOOSE (Generic Object-Oriented Substation Event) messages, analysis of the load of the local computer network, viewing errors, viewing the characteristics of network protocols. The scanner interface is designed in the user-friendly concept and the layouts of the network scanner are presented in this paper. During testing of the network scanner software, a problem was discovered – insufficient performance on devices with low processor power. In this regard, the article presents the tools for solving this problem and the results of the network scanner software on the Raspberry Pi 4b minicomputer.