Research on the Invulnerability of Electricity-Gas-heat-cold-integrated Energy Systems Based on Complex Network Theory

As the network scale of integrated energy systems continues to expand, the stability of integrated energy systems has attracted more and more attention. The application of complex network theory to the stability analysis of electricity-gas-heat-cooling integrated energy systems is proposed. Firstly, the three characteristic parameters of complex network theory, mean path length, aggregation coefficient, degree, and degree distribution, are introduced, and the networkx installation package of python is used to construct the complex network diagram of the electric-gas-heat-cooling integrated energy system. Secondly, three failure scenarios, random attack, deliberate attack, and dynamic attack, are established to attack the network. Finally, three evaluation metrics, network efficiency, maximum connectivity, and failure ratio, are used to analyze the network under the three attacks for resistance to destruction. The simulation results verify the effectiveness of the proposed method, and the research results provide a theoretical basis and reference for building a more robust integrated energy system in the future.