A Study on Cyber Security of Smart Grid on Public Networks

Due to the wide use of public networks in smart grid, the security risks are increasing. Therefore, cyber security becomes an important and urgent issue in the smart grid systems on the public networks. In this paper, the business functions and system architecture of the smart grid systems on public networks are analyzed, and the cyber security risks in main stations, communication networks and field devices are studied. Based on the analysis, technological requirements of information security for the smart grid systems on the public networks are proposed, including access control, integrity, confidentiality and other controls for communication and field devices. To meet the security requirements, the paper proposes a practical and reliable protection framework and some certification suggestions for typical systems.