The power system consists of power generation, transmission, transformation, distribution, power consumption and dispatch. It is a unified system that converts primary energy into electrical energy and transmits and distributes it to users. Power generation is the starting link of the entire power system. At present, my country’s power plants are mainly thermal power plants. With the development of power plant automation control systems towards the integration of centralized monitoring and management, the interconnection and interoperability between power plant control systems are gradually strengthened, and the power plant industrial control equipment models are diverse, and industrial control systems There are many types, complex processes in power plants, and the consequent lack of safety protection construction, which also poses a serious threat to the information security of digital power plants.