Deepening Application Research on Substation Auxiliary Equipment Monitoring System Enabled by Advanced Digital Technology

The development status of substation auxiliary control system technology is explained, the substation operation and maintenance and its intelligent development of the new demand is analyzed, and the self-developed auxiliary control system platform architecture design is introduced. Advanced digital technologies such as digital twin, reduced-order modeling, knowledge graph and multi-source data fusion are introduced into the auxiliary control system, and research has been carried out to deepen the application of the auxiliary control system, such as digital twin intelligent operation and maintenance, multi-source data fusion intelligent sensing. Digital Twin Intelligent operation and maintenance is based on the reduced-order agent modeling technology, which achieves a significant reduction in the average simulation computation time from 6.27 hours to 17.25 seconds. Multi-source data fusion intelligent sensing is based on improved D-S evidence theory and Bayesian knowledge graph technology, which realizes the diagnosis and assessment of fault types, especially for equipment insulation, theoretically eliminating the possibility of misdetection. The deepening application of the auxiliary control system has strongly enhanced the safety and reliability of the power grid, and significantly improved the efficiency and intelligent level of operation and maintenance.