Estimation method for false data attack of load frequency control system

Abstract

The invention relates to an estimation method for false data attack of a load frequency control system. The method comprises the following steps: firstly, establishing a mathematical model of the load frequency control system according to a dynamic model of a power system; then, aiming at the situation that a power grid frequency measurement value and a tie line power measurement value are attacked by false data injection, analyzing the influence of an attack signal on a system state equation, and establishing a load frequency control system mathematical model containing a false data injection attack signal; then, designing a self-adaptive observer, and estimating a system state and an attack signal; and finally, solving the observer gain based on a linear matrix inequality method by using a Lyapunov stability theory and a robust H-infinity optimization index, and ensuring the convergence and the bounded property of an attack signal estimation error of the load frequency control system. According to the method provided by the invention, the false data injection attack signal of the load frequency system can be accurately estimated, the external interference can be suppressed, and the method has the advantages of simple design and easy engineering implementation, and has very high practical value.

Description

Technical field [0001] The present invention relates to the field of power system operating control, and more particularly to an estimation method for false data attacks for load frequency control systems. Background technique [0002] With the continuous advancement of intelligent grid construction, large-scale introduction of modern information technology and advanced communication technologies such as mobile interconnection, artificial intelligence in power systems, and integrate the physical environment of the computing system, communication network, and power systems to form a real-time perception. Dynamic control and complex system of information decision fusion. A wide range of network connectivity of smart grids and a remote access interface that lacks effective safety protection, resulting in the threat of the grid to the network attack. In recent years, network security issues have become an important factor in threatening power system safe operation. The trend of attac...

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Problems solved by technology

At present, scholars at home and abroad have done a lot of research on the detection of network attacks on load frequency control systems, but there is still a lack of sufficient research on attack estimation methods.

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