The invention discloses a power distribution network
risk assessment method for massive distributed resource access, and the method comprises the following steps: dividing a risk domain according to the related information of a power distribution network, carrying out the
stratified sampling of the risk domain, carrying out the Monte Carlo
simulation, obtaining a sample matrix of risk indexes, inputting a
random forest model, and calculating the importance
score of the risk indexes, screening key risk indexes based on the importance threshold; taking the importance
score as an objective weight, calculating a subjective weight by using an
analytic hierarchy process, calculating a difference degree according to the subjective and objective weights, and fusing the subjective and objective weights to obtain a comprehensive weight; and obtaining a key
risk index characteristic value in a to-be-evaluated scene, calculating the membership degree of the key
risk index after adjusting the boundary parameter of the membership
degree function according to the related information of the to-be-evaluated scene, calculating the comprehensive
risk index according to the comprehensive weight and the membership degree of the key risk index, and judging the
risk level. The method can fully consider the topological characteristics of the power distribution network, is suitable for the dynamic access of distributed resources, and achieves the precise
risk assessment.