Method for improving reliability of multi-state power grid information physical system based on Lz transformation

Abstract

The invention discloses a method for improving the reliability of a multi-state power grid information physical system based on Lz transformation. Firstly, the Markov process of power grid information physical system elements is determined according to the influence of information layer uncertainty on a physical layer, and state probability distribution of all the elements is obtained and solved through element differential equations. And establishing an Lz transformation function of each element. And determining an Lz transformation function model of the whole multi-state system according to the system connection condition. Then, a K-means clustering algorithm is used for processing a system Lz transformation function model; and finally, determining a Markov process of the power demand, and obtaining and utilizing a demand differential equation set to solve state probability distribution of the power demand, thereby determining an Lz transformation function of the demand. And finally calculating the reliability parameter. According to the method, the influence on safe and stable power supply of the power grid information physical system after the uncertainty of the introduced information layer is considered, and the reliability of the multi-state power grid information physical system can be better improved.

Description

technical field [0001] The invention belongs to a method for improving the reliability of a power grid cyber-physical system in the technical field of power systems, and particularly relates to a method for improving the reliability of a multi-state power grid cyber-physical system based on Lz transformation. Background technique [0002] With the increasingly close coupling between the power network and the information network, and the more frequent interaction between energy flow and information flow, the network system of the power grid cyber-physical system has become the development direction and form of the smart grid and the energy Internet. The power grid cyber-physical system refers to the integration of advanced sensing, computing, communication, control and other information technologies and automatic control technologies to build a power grid system and the information and communication systems. , Efficient and collaborative complex system, realize on-demand resp...

AI Technical Summary

Problems solved by technology

However, the introduction of uncertain risk factors in the information layer has a negative impact on the safe and stable power supply of the power system. The coupling of the information layer and the physical layer constitutes a multi-state complex system. Conventional power system reliability calculations cannot meet the needs, and a multi-state power grid is urgently needed Methods of improving the reliability of cyber-physical systems

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