Real-time Optimal Dispatch of Source-Grid-Load-Storage based on Graph Database

Due to fluctuations of renewable energy, it is necessary to coordinately dispatch source-grid-load-storage. However, it takes long time to solve large scale optimization model and may not satisfy real-time requirement. This paper proposes a real-time optimal dispatch of source-grid-load-storage based on graph database. A spatiotemporal graph model of power system is established using a graph database, introducing adjustable loads and energy storage. A real-time optimal dispatch model is developed to minimize the cost of generation units and adjustable resources. Case studies on IEEE118 and IEEE1354 test systems indicate that the application of graph database can reduce the computation time to satisfy real-time dispatch requirement.