Research on Digital Twin System for Power Substation Situation Awareness and Operation Simulation

Digital twin technology is considered the fundamental to realize the digitization and intelligence transformation for power industry. In this paper, a general module structure, which is composed of ontology model, data model, 3D model and simulation model, is used to build the digital twin model for a physical entity in power substation. The knowledge graph based on the graph database is built to organize the different modules in a digital twin power substation and reflect the various connections between them. Furthermore, a power substation simulation method is proposed to support the virtual operation based on the real time status of the substation. Finally, a prototype digital twin system for power substation is built. The system can provide a novel platform for immersive status display and operation process simulation, which can be applied to support the substation situation awareness, operator training and operation plan verification.