Cyber attack estimation and detection for cyber-physical power systems

Abstract

This paper mainly studies the problem of cyber attack estimation and detection in cyber-physical power systems (CPPS). Firstly, CPPS under cyber state attack and sensor attack are modeled through system characteristics. Secondly, to achieve attack estimation, two robust observers are designed for the CPPS under state attack and sensor attack respectively, which can guarantee the error systems are asymptotically stable with a prescribed H∞ performance. Next, to achieve attack detection, attack detection logic is introduced by comparing the threshold with the estimated attack. Finally, in order to show the feasibility of the state attack and sensor attack detection, taking power systems with three generators and six buses as an example, the simulation results are given.