Cyber-Physical System Security and Protection Strategies for the Smart Substation

As an important part of the smart grid, smart substation is the key operating parameters collection point and control execution point, thus its safe and stable operation is one of the fundamental bases of ensuring the grid continues to provide a reliable energy resource for the development of the national economy. Using more and more new information and communication technologies, which greatly improve the operating efficiency and grid intelligence, smart substation is a typical cyber-physical system (CPS), facing various of security risks. Different from the traditional view point of cyber security and power system safety, this paper analysis the security threats substation faced with on the perspective of CPS three layer architecture, which consists of perception-execution layer, transport layer and application-control layer, and puts forward the corresponding protection strategies.