Weak node identification method and device and storage medium

The invention discloses a weak node identification method, a weak node identification device and a storage medium, belongs to the technical field of electric power system quality identification, and solves the problem that the weak node identification method cannot utilize limited node state information to acquire state information of nodes of a whole network to identify weak nodes. Constructing a power distribution system model to obtain a PMU measurement device configuration matrix and carrying out network topology layering; state information of nodes of the whole network is acquired for first static stability judgment; constructing a node complex voltage change curve, and calculating a node curvature radius and a curvature radius change rate; and performing second static voltage stability judgment on all the nodes by using an improved K-means clustering method, and identifying weak nodes of the power distribution system model. According to the method, the state information of the whole network nodes can be