Research on Mulit-Layer Cooperative Defense Model Oriented to Network Security of Power System

The security control and production management of the power system are highly dependent on the network communication between the levels of regulatory agencies, and cyberspace security events always threaten the stable operation of the power grid.In order to meet the needs of power monitoring system architecture and network security collaborative protection, a multi-level, deep distributed collaborative defense model is designed and proposed, and a set of implementation methods are given from the perspective of model architecture, technical methods and functional mechanisms of each module.Based on the characteristics of self-defense and cross-domain cooperative defense in the domain, the model cooperates with security protection devices to perform multi-level active collaborative defense from the host layer, security device layer to the network layer by the highest degree of correlation defense decision-making based on the gray correlation decision.Through the analysis, it is found that the model has the capability of real-time monitoring of network security risks, rapid response to security threats, and dynamic handling of cyber security events, which can effectively improve the level of network security protection of power monitoring systems.