Cybersecurity in digital substations: Cyber-physical system modelling, assessment and analysis

摘要

The increasing digitalization within station automation enables new applications for intelligent functionalities in substations of electrical power systems. For this, the utilization of IEC 61850 as unified communication standard is a key requirement but also changes the vulnerability for cyber-attacks. For cyber-security investigations of digital substations a cyber-physical real-time co-simulation platform is introduced. A reference architecture of an IP-based substation is presented and enables the modelling, assessment and analysis of digital substation within disturbed and undisturbed grid situations as well as under consideration of cyber-attacks. Based on this, novel approaches and methods for resilience assessment of digital substations and cyber-security measures for operations, e. g. the detection of cyber-physical anomalies, are described and discussed.