The invention relates to the technical field of automatic operation and maintenance of a power
system, in particular to an automatic operation and maintenance method and
system for
plant-
station equipment based on a
knowledge graph, and the method comprises the steps: collecting static ledger data, real-time operation data and historical operation and maintenance data of the
plant-
station equipment, constructing a multi-dimensional association
knowledge graph, creating a digital twinborn body for target equipment in a
plant station, and carrying out the operation and maintenance of the plant-station equipment. Establishing a bidirectional
data channel between the digital twin and a corresponding equipment entity node in the
knowledge graph; and based on a state evaluation rule and a
fault propagation path model preset in the knowledge graph, performing real-time health state evaluation on the target equipment by using the state evaluation rule and the
fault propagation path model to generate a
health index, and when an
abnormality is monitored, tracing along the topological relation between the
electrical connection and the equipment in the knowledge graph, the fault source is positioned, the confidence probability is calculated,
risk level evaluation and
processing priority
ranking are carried out according to the confidence probability, an operation and maintenance diagnosis work order containing an
execution time sequence is obtained, and the fault reason can be quickly traced and positioned.