Power distribution network damage extent judgment method and system based on time synchronism

The invention discloses a power distribution network "minimally-invasive" damage extent judgment method and system based on time synchronism and belongs to the technical field of data monitoring of apower distribution network. The method is characterized by setting the level of a line where each circuit breaker is located; determining a distribution transformer connected to each level of line; arranging an information acquisition terminal for operational data acquisition on each distribution transformer; obtaining a data message of each information acquisition terminal for describing an abnormal operation event of a related distribution transformer or associated electrical and communication components in a target distribution network; and based on the time synchronism and a regional distribution network structure connection relation in the target distribution network, determining the information acquisition terminal, which fails to describe the abnormal operation event, in the same data message element collec