The present invention relates to a method for evaluating an independent operation holding power of a power system that can be linked with an upper power system, comprising: when selecting an independent operation event, reconfiguring the power system according to the selected independent operation event; Collecting independent operation data related to distributed resources of the reconstructed power system; Simulating independent operation of the reconstructed power system based on the collected independent operation data; And evaluating the independent operation holding power of the reconstructed power system based on the independent operation simulation result.
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