Load frequency quantification control method based on event trigger mechanism under DoS attacks

Abstract

The invention discloses a load frequency quantification control method based on an event trigger mechanism under DoS attacks, which is specifically applied to the load frequency quantification controlin a multi-region electric power system. The method comprises the following steps of: establishing a switching system model of load frequency control of the multi-region electric power system with aquantification device under the DoS attacks; introducing the event trigger mechanism into the switching system model and setting trigger conditions of the event trigger mechanism; defining a first segment function and a second segment function based on the state of the multi-region electric power system and a time delay system theory respectively; improving the switching system model based on thefirst segment function and the second segment function to obtain a final switching system model; determining a trigger matrix and a controller gain matrix; establishing a state feedback controller ofthe final switching system model. According to the method provided by the invention, stable and safe operation of a load frequency control system of the multi-region electric power system is ensured;meanwhile, network bandwidth resources occupied in a communication process and needed energy sources can be reduced.

Description

technical field [0001] The invention belongs to the technical field of power system control, and in particular relates to a load frequency quantitative control method based on an event trigger mechanism under a DoS attack. Background technique [0002] In recent years, the security control of network control systems has become a research hotspot. Network control systems often adopt distributed control methods, and the collected dynamic information and various control signals are transmitted through the network, which will provide opportunities for network attacks. At the same time, as the scale of the power system becomes larger and the interconnection between the power grids becomes stronger, load frequency control, as an important control method for the stable operation of the power system, has become the focus of research. [0003] In multi-area power system load frequency control, multiple nodes share a limited bandwidth resource, how to save bandwidth resources, avoid c...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem in the above-mentioned prior art that the load frequency control of multi-regional power systems is likely to cause insufficient broadband resources, thereby generating too many redundant signals and increasing the pressure on the network, the present invention proposes an event-based triggering mechanism under DoS attacks The load frequency quantization control method; in the case of multi-regional power system safety control, this method introduces an event trigger mechanism and a quantizer, thereby ensuring a more stable and safe operation of the system and reducing the update of the controller signal The frequency and the transmission size of the transmission signal reduce the communication pressure, save the bandwidth and the energy required for communication. The specific technical solutions are as follows:

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