Intelligent Modeling and Application Method of Energy Hub Based on Directed Graph

An energy hub, which combines electricity, heating, cooling, fuel, and other energy sources, is a key component of an energy network. The process of its optimization and control should be rapid and accurate, and the modeling method should be standardized and programmed. This paper presents a modeling method based on a directed graph. This method establishes a directed graph in which each vertex is an energy type. Subsequently, it is transformed into an adjacency matrix based on the equipment, control, and efficiency parameters. An intelligent algorithm is proposed to obtain the model of the energy hub by searching the adjacency matrix. The process of the intelligent modeling and application method is demonstrated using a case study. The simulation results show that the proposed method could establish the energy hub model and control rapidly, effectively, and economically. Therefore, it has applicability in the construction and operation of an energy hub. © 2026 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.