Onmodeling of electrical cyber-physical systems considering cyber security<FootNote> Project supported by the National Basic Research Program (863) of China (No. 2015AA05002), the National Natural Science Foundation of China (No. 61471328), and the Science and Technology Project of State Grid, China (No. XXB17201400056) </FootNote>

Abstract

This paper establishes a new framework for modeling electrical cyber-physical systems (ECPSs), integrating both power grids and communication networks. To model the communication network associated with a power transmission grid, we use a mesh network that considers the features of power transmission grids such as high-voltage levels, long-transmission distances, and equal importance of each node. Moreover, bidirectional links including data uploading channels and command downloading channels are assumed to connect every node in the communication network and a corresponding physical node in the transmission grid. Based on this model, the fragility of an ECPS is analyzed under various cyber attacks including denial-of-service (DoS) attacks, replay attacks, and false data injection attacks. Control strategies such as load shedding and relay protection are also verified using this model against these attacks.

Keywords

Cyber-physical systems / Cyber attacks / Cascading failure analysis / Smart grid

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2016 Zhejiang University and Springer-Verlag Berlin Heidelberg