Problems of Cyber Security of Digital Substations

摘要

Digital substation is a substation with a highly automated control, where almost all processes of information exchange between substation components, communication with external systems, and control of the substation operation are carried out digitally based on IEC 61850 protocols. The high importance of substations for the operation of power systems places unconditional requirements for their cyber security. Data transfer on Ethernet through the process bus and substation bus leads to an increased vulnerability of the digital substation to cyber attacks. The most common cyber attacks and their consequences influencing digital substation operability during cyber attacks, and also countermeasures are analyzed. A tree of threats and attacks to analyze digital substation capability to resist cyber attacks and restore operability after their exposure.