An Object-Oriented Hierarchical Modeling Method for Power Grid Cyber-Physical System

Abstract

The invention discloses an object-oriented hierarchical modeling method for a power grid cyber-physical system. The details are as follows: 1) establishing a five-layer structure model of the power grid CPS; 2) redefining the adjacency matrix to realize the power grid CPS topology modeling; 3) A power grid CPS object state transfer model is established to describe the object state transfer process; 4) The idea of ​​coupling model, each node in power grid CPS is regarded as an atomic model with independent internal structure, behavior and I / O interface. Each atomic model forms a coupling model in the form of an interface based on a certain connection relationship. Finally, the power grid CPS is described as a network composed of multiple coupled components, and the hierarchical relationship modeling of the power grid CPS is realized to describe the vertical relationship between levels. The invention can be used to analyze various problems such as the cross-influencing factors of the CPS physical space and the information space of the power grid, and has great significance for realizing the fusion modeling and comprehensive security assessment of the power grid cyber-physical system.

Description

technical field [0001] The invention belongs to the field of grid information physical system fusion modeling, and relates to an object-oriented hierarchical modeling method of grid information physical system. Background technique [0002] In order to adapt to the wide access of new energy, realize the efficient utilization of energy and meet the diversified needs of electric energy consumers, a large number of information and communication equipment and systems are connected to the power system, making the current smart grid develop into a deep information space and physical space. The grid information physical system (Cyber ​​Physical System, CPS) that integrates, information process and physical process cooperates and interacts, referred to as grid CPS. [0003] The deep integration of information space and physical space in the power grid CPS and the collaborative interaction of energy flow and information flow have brought great capacity improvements to the modern powe...

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Problems solved by technology

[0006] Aiming at the shortcomings mentioned in the background method mentioned above that the current power grid CPS modeling methods based on dependent networks, hybrid system technology or adjacency matrix have poor model universality and cannot reflect the cross-propagation of network attack effects between information space and physical space, The present invention refers to the idea of ​​DEVS layering and modularization, and proposes an object-oriented layered modeling method for power grid cyber-physical systems

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