Information impact on the risk analysis of the malicious attack against power system

Since the malicious threats are concerned widely around the world, authorities are keen to implement adequate countermeasures against the malicious attacks, in which the information plays a very important role. In this paper, the problem of the risk analysis of malicious attacks against the power system is addressed with particular consideration of the information. Due to the strategic interaction among the attacker and the defender, a model based on game theory is proposed. Focusing on the importance of the information, Bayesian game is applied to study the impacts of the imperfect information. Several information scenarios are considered; they are generated in terms of the defender's and attacker's knowledge about their opponent's action costs. Conclusions are drawn with the numerical example of the IEEE RTS 96 system.