Distribution network power supply safety capability evaluation standard quantification method, system, equipment and medium

The invention discloses a distribution network power supply safety capability evaluation standard quantification method, system and device and a medium, and the method comprises the steps: carrying out the local topology of a feed line group of a distribution network, and carrying out the net rack analysis of each feed line of the feed line group; according to the number of medium-voltage users, the number of low-voltage users and the load value which have the maximum influence and the fault occurrence probability of the line section of the most serious weak link of each feeder line after the feeder line passes through the corresponding power recovery means under the N-1 condition, calculating a reference risk value corresponding to each feeder line; determining a net rack reference risk level corresponding to each feeder line according to a preset corresponding relationship between different reference risk value ranges and different net rack reference risk levels; evaluating the power supply safety capabilit