Robust Defense Strategy Against Cyber Physical Attacks In Networked Microgrids

Abstract

Future smart grids will be interconnected with several multi-owner networks with multiple interests and goals. The security of this interconnected network is extremely difficult. Cyber-attacks have increased sharply in recent years. Increasing the scope of intelligent system increases the attention for cyber threats. By increasing the system's intelligence the range of cyber-attacks increases. With the advent of smart home and new concepts such as the Internet, attacker have made many devices much easier than their physical access. An attacker with access to system information through eavesdropping identifies the best possible attack time. In this paper a bi-level model proposed for the cyber-attacks and defense against it. The first part is a cyber-attack. In this section, the entire network includes the microgrids (MGs) and the part that belongs to the distribution company, with the same communication structure. For the attacker, the attack limit and the resource constraints for the attack are considered. The second part assumes that the network has different infrastructures. The distribution company uses fiber optic cables. Which is almost impenetrable and invaded. The other MGs use each of the different infrastructures. In the third case, the cyber-physical coordinate attack is done to the system. The real 94-bus network in Portugal has been used to investigate cyber-attacks in this paper.