Load importance-based three-stage topological operation optimization method

The load importance-based three-stage topological operation optimization method provided by the embodiment of the invention comprises the following steps: collecting power distribution network operation data after a fault, and establishing a topological structure for fault identification; establishing a load importance evaluation model according to the power-losing charge in the distribution network operation data; searching a distributed power generation device with adjustable power in the island area of the distribution network, and carrying out first-stage topological optimization; establishing a two-stage topological optimization model, and performing load transfer on the standby feeder line and the distributed power generation device; and after load transfer, if a target substation in an overload operation state still exists, establishing a secondary transfer model, and obtaining the optimal transfer load capacity of the target substation. The method can effectively process the decision of the optimal op