The invention discloses a tough power distribution network 
planning method and 
system considering 
energy storage configuration under extreme natural disasters, and relates to the technical field of tough power distribution network planning. The method comprises the steps of considering a 
toughness concept curve of a power distribution network and calculating annual comprehensive loss-of-load costof the power distribution network; according to a time characteristic and a space characteristic of the extreme natural disasters, considering a whole process from a disaster 
attack to fault recoveryof the power distribution network, and establishing a multi-stage power distribution line fault state set; considering an 
investment planning constraint set, a multi-stage power distribution line fault state set and a 
system operation constraint set, and establishing a power distribution network DAD planning model by taking minimums of annual 
investment cost of line reinforcement, the annual 
investment cost of 
energy storage configuration and the annual comprehensive loss-of-load cost as target functions; and solving by adopting a column and constraint generation 
algorithm to obtain a coordination scheme of line reinforcement and 
energy storage configuration under the extreme natural disasters. By adopting the method or the 
system of the invention, a disaster response capability of the tough power distribution network can be improved, and the 
investment cost is reduced.