A Calculation Method for Power Limit of Transmission Section Based on Knowledge Graph

In response to the problems of large workload, long calculation cycles, and low refinement in manual section limit calculations, this paper proposes an intelligent calculation method for power limits of transmission section based on a knowledge graph. Based on the experience of dispatch operation experts and historical calculation results, a knowledge graph for automatic calculation of section limits is constructed. Using the rules of the knowledge graph and artificial intelligence technology, the offline expert is simulated to adjust the operation mode and conduct safety and stability checks to obtain the power limit of transmission section. Considering constraints such as thermal stability, transient stability, and dynamic stability, the section limit and its applicable conditions are determined. The effectiveness of this method is verified through case analysis of online data from actual power grids.