Method and device for analyzing running state of power distribution network and online monitoring system

The invention provides an analysis method and device for the running state of a power distribution network and an online monitoring system. Under the access scene of the high-permeability distributed power supply, through mutual cooperation of the entity mechanism model and the digital twinborn model, the detection accuracy of the entity mechanism model is ensured, and the detection efficiency of the digital twinborn model is also ensured; the problems of low operation state detection efficiency and low accuracy of the power distribution network in the access scene of the high-permeability distributed power supply are solved, and the detection efficiency and accuracy of the operation state detection of the power distribution network can be considered at the same time. According to the method, the historical data of the multiple nodes are comprehensively analyzed, the training samples are established, the digital twinborn model obtained through training adapts to the high-complexity condition under the access