Stability Analysis of the Cyber Physical Microgrid System under the Intermittent DoS Attacks

Abstract

Recent research has demonstrated the vulnerabilities of cyber physical microgrid to different rates of denial-of-service (DoS) attacks, which send internal requests to degrade the victim's performance. However, the interaction between the attacks and the security of microgrid remains largely unknown. In this paper, we address two fundamental questions: (1) What is the impact of intermittent DoS (IDoS) attacks on the security of cyber physical microgrid and (2) how can we analyze the stability of the cyber physical microgrid under IDoS attacks? To tackle these problems, we firstly model the cyber physical microgrid system considering the IDoS attacks on the network server. Based on the model, the interaction between the cyber system and the physical system is analyzed. Then, the impacts of IDoS attacks on the security of the cyber physical microgrid system are studied. It shows that the attack may lead to the system level oscillation with the information variation during the attack period. Therefore, a risk assessment method is proposed to investigate the stability of the cyber physcial microgrid system under IDoS attacks. Lastly, the proposed methodology is verified by simulation results.

Security Assessment for Cyber Physical Distribution Power System Under Intrusion Attacks

“…They are commonly referred to as the Confidentiality, Integrity and Availability (CIA) security objectives. In an active distribution power system, when Availability is destroyed, failures in data transmission and other issues occur to cause power supply failure and cascading, which has tremendous effects on the system securities [32].…”

Impact of Cyber Attacks on High Voltage DC Transmission Damping Control

“…AC-HVDC systems usually implement an enormous number of cyber devices and communication networks that are susceptible to failures; any attack that jeopardizes the cyber infrastructure will inevitably affect system security and stability [15][16][17][18]. The AC-HVDC system's wide attack surface and its increasing dependence on communication make it subject to all major cyber attacks, including denial of service (DoS) [19,20], replay [21] and false data injection attack (FDIA) [22]. The likelihood of cyber attacks triggering potentially devastating results is also real, and the impacts of cyber attacks on AC-HVDC systems are not well understood.…”