Power distribution network reliability evaluation method based on probabilistic connectivity criterion

The invention discloses a power distribution network reliability evaluation method based on a probability connectivity criterion, belongs to the field of power distribution network reliability evaluation, and aims to solve the problem that the power distribution network transfer margin is difficult to accurately measure after a fault is caused by multiple uncertainty of a source load. And providing an active power distribution network reliability evaluation method considering the network security constraint probability out-of-limit risk after the fault. Firstly, a Latin hypercube sampling method is adopted to establish a distributed power supply and load demand and response uncertainty model; secondly, a fault incidence matrix derivation method considering the capacity and voltage probability out-of-limit risk after the fault is put forward; thirdly, proposing a chance constraint processing method and a nonlinear power flow conversion method based on normal distribution probability characteristics; and finall