Power distribution network reliability evaluation method and device and storage medium

The invention discloses a power distribution network reliability evaluation method and device and a storage medium. The method comprises the steps of obtaining historical statistical data of a power distribution network, and dividing a fault power failure event into a short-circuit fault power failure event, a grounding fault power failure event and an emergency defect elimination power failure event; respectively calculating the failure rates and power failure durations of the three types of fault power failure events; dividing the power distribution network into a plurality of blocks according to the distribution of switching equipment in the power distribution network; obtaining the failure rate and the power failure duration of each element in each block, and obtaining an equivalent reliability parameter of each block according to calculation; enumerating various fault events by taking the blocks as units, determining a fault influence range, and judging a fault type of each block;and performing reliabili