Double-layer defense method facing power system false data injection attack

Abstract

The present invention discloses a double-layer defense method facing a power system false data injection attack, comprising an upper-layer defense policy and a lower-layer defense policy. In the upper-layer defense policy, based on internal defense means of a power system, methods such as bad data identification, injected power detection, and the like are mainly comprised, and injected false datais preliminarily detected, to generate attack space; and in the lower-layer defense policy, based on redundancy measurement defense means, a configuration position of a measurement apparatus is optimized by using a two-person zero-sum game theory according to an attack range that can be defended by the measurement apparatus, to make the measurement apparatus to implement an optimal defense capability on an attack behavior that is not detected by the upper-layer policy. The double-layer defense method facing a power system false data injection attack is used to assist a defender in establishinga power system security defense counterattack system.

Description

technical field [0001] The invention belongs to the technical field of electric power system security, and in particular relates to a double-layer defense method facing false data injection attacks of electric power systems. Background technique [0002] With the rapid development of smart grids and the in-depth application of advanced information technologies such as perception, computing, communication, and control, the power system is gradually realizing informatization, networking, and intelligence. While promoting real-time analysis, scientific decision-making, and efficient allocation of power resources, open communication networks and interface terminals also bring potential security risks. Compared with the relatively robust primary power system, the research on the security protection of the information communication system started late, and there are many security loopholes. Due to the great interest correlation and wide dissemination of the power system, once it ...

AI Technical Summary

Problems solved by technology

Among them, false data injection attack (false data injection attack, FDIA) is an attack method that destroys the integrity of power grid information by tampering with terminal measurement data. The data will interfere with the analysis and decision-making of the upper-level control center, causing serious attack consequences, so it is a relatively high-level attack method for the power system.

The principle of FDAA is to use the limitations of the bad data identification method in the state estimator to carry out coordinated attacks on multiple nodes and lines in the power grid, maliciously tamper with the measured values ​​of the components, thereby manipulating the state estimates of specific components, so that the control center Misjudgment that the power grid has entered an emergency state, resulting in mis-cutting and misoperation of the power system, thus affecting the monitoring ability and safe and stable operation level of the power system

Images