Modeling Method for Cyber-Physical Power Systems Considering Multiple Coupling Characteristics

With the wide application of intelligent devices, the operational efficiency of power grids has been improved, but it also brings new security challenges. In order to solve this problem, this paper proposes a modeling method for Cyber-Physical Power System considering multiple coupling characteristics from the perspective of information-physical convergence and by comprehensively considering the correlation relationship and coupling characteristics of the power grid and cyber network. Firstly, a three-layer modeling framework of power information physics considering multi-layer coupling characteristics is proposed. Secondly, based on the steady state trend equation of the power grid, the power network operation model and the cyber network operation model are established considering the information transmission process and the information decision process, respectively. On this basis, a coupling relationship model containing structural coupling and functional coupling is established to form an integrated Cyber-Physical Power System model. Finally, the validity of the model is verified by simulation analysis based on the IEEE 24-node system.