Control-theory based security control of cyber-physical power system under multiple cyber-attacks within unified model framework

Due to the integration of information and internet, the power network has facing more and more uncertain risks of malicious attacks. In response to this problem, we studied it from following four aspects. First of all, multiple cyber-attacks (Denial-of-service, information disclosure, replay attack and deception attack) are analyzed from each operating mechanism. Then, the subsystems are concluded to be a generic modeling frame with considering different type cyber-attack. Secondly, secure defense scenarios are proposed according to each kind cyber-attacks based on the mechanism details. Thirdly, security control conditions are derived by utilizing control theory of stability. Finally, IEEE-14 and IEEE-39 system are used as typical cases to illustrate and analyze the impact of dynamic load altering attack on some of these nodes.