The invention belongs to the technical field of power distribution network operation and maintenance, and relates to a distribution network
topological graph real difference diagnosis method based on a graph neural network, which comprises the following steps: injecting an initial detection
signal sequence into a power distribution network, collecting and integrating responses generated by a collaborative sensing terminal, generating a
graph node original
feature set, and executing cross
verification. Generating an enhanced initial topological connection feature graph, inputting the initial topological connection feature graph into a preset graph neural
network model, and generating a topological diagnosis probability graph; according to the topology diagnosis probability map, generating a secondary detection
signal sequence, injecting the secondary detection
signal sequence into the power distribution network, generating a focusing response
data set in the abnormal area, performing iterative diagnosis on the abnormal area based on the focusing response
data set, and generating a final topology difference positioning report; according to the invention, the problem that a modern
power grid is difficult to support large-scale and normalized topology
verification requirements under the operation and maintenance requirements of real-time performance, accuracy and economical efficiency is solved.