A Modeling Method for Power Cyber-Physical System Based on AC Power Flow Model

Abstract

The present invention is a method for modeling electric power cyber-physical systems based on AC power flow model, which is characterized in that it includes: power network modeling, information network modeling, and interactive process steps between power network and information network, and the method takes into account the power flow of the power network The characteristics and monitoring and control functions of the information network realize the modeling of the power cyber-physical system. Compared with the modeling method based on complex network theory, the method of the present invention can better reflect the dynamic characteristics of the power network, and the optimal economic dispatch algorithm adopted by the information network not only meets the supply and demand balance of the power system, but also takes into account the economic operation of the system , can quantitatively reflect the influence of various parameter changes of the power cyber-physical system on the system, and can be widely used in the fields of security analysis, cascading failure propagation process and vulnerability assessment of power cyber-physical systems. It has the advantages of scientific and reasonable method, strong applicability and good effect.

Description

technical field [0001] The invention belongs to the field of power information physical system security, and relates to a power information physical system modeling method based on an AC power flow model. Background technique [0002] In the context of smart grid development, modern power systems are evolving into power cyber-physical systems, and the interaction between power grids and information networks is becoming increasingly complex. for a double challenge. Therefore, establishing the power cyber-physical system model is of great significance to the analysis of the security issues of the power cyber-physical system. The power cyber-physical system is mainly composed of a power network and an information network. The power network includes generators, transformers, loads, transmission lines and circuit breakers to complete the production, transmission and distribution of electrical energy; the information network includes wide-area measurement systems, data The acqui...

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Problems solved by technology

[0003] (1) The power cyber-physical system model based on complex network theory only takes into account the static characteristics of the power cyber-physical system, ignoring its dynamic characteristics;

[0004] (2) Although the power cyber-physical model established based on the DC power flow model has the advantages of simple calculation and fast speed, it deviates greatly from the characteristics of the actual power network;

[0005] (3) The control algorithm adopted by the existing power cyber-physical system model information network only considers the control of the power supply and demand balance of the power grid, and does not involve the economic operation of the power grid

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