Power distribution network fault analyzing method and device based on tidal current distribution characteristics

The invention relates to a power distribution network fault analyzing method and device based on tidal current distribution characteristics, and belongs to the field of power distribution network fault analysis. According to the method, historical fault section data of a power distribution network is intercepted, tidal current distribution in case of a fault of the power distribution network is described through computing a sensitivity matrix norm by adopting a generalized sensitivity analytical method, faults are classified by utilizing an automatic dynamic self-adapting clustering method, and a fault pattern base is established; network topology of a current fault is dynamically analyzed, and a to-be-measured branch circuit in the current fault power distribution network is confirmed; and the fault is diagnosed in an online manner. The method disclosed by the invention mainly aims to extract the network topology and the physical characteristics at the moment of the fault and extract corresponding numerical characteristics so as to perform accurate diagnosis on the fault. As the fault pattern base is directly established, alteration and deletion of intermediate regulations are avoided, simulation of functional relation between fault information and fault elements is not needed, the problem brought by a nonlinear system is solved, and the power distribution network fault analyzing method and the power distribution network fault analyzing device are suitable for online/offline fault diagnosis of any linear/nonlinear system.