Power distribution network grounding fault positioning method, system and device and storage medium

The invention belongs to the technical field of power distribution network fault positioning, and discloses a power distribution network grounding fault positioning method, system and device and a storage medium. Obtaining primary and secondary resonant frequencies of fault transient zero-sequence current of each detection point upstream and downstream of the fault point according to the characteristics; performing s transformation on the fault transient zero-sequence current of the upstream and downstream of the fault point of each detection point to obtain an s matrix and a modular matrix; and calculating the energy values of the primary and secondary resonant frequencies of each detection point, calculating the ratio of the energy values of the primary and secondary resonant frequencies between the detection points, and taking the section with the maximum difference value between the energy values of the primary and secondary resonant frequencies between the two detection points as the fault section. Accor