Distribution network fault severity assessment method based on multi-source information fusion analysis

The invention belongs to the technical field of power distribution network fault diagnosis, and particularly discloses a power distribution network fault severity evaluation method based on multi-source information fusion analysis, which comprises the following steps of: extracting a waveform characteristic quantity of an instantaneous fault according to power disturbance data acquired by a power distribution network field fault recording device; querying historical statistical data information, and extracting a fault statistical characteristic quantity; calculating a fault index of the waveform characteristic quantity and a fault index of the fault statistical characteristic quantity; and according to the fault index of the waveform characteristic quantity and the fault index of the fault statistical characteristic quantity, calculating a comprehensive state score of the instantaneous fault, comparing the comprehensive state score with a preset threshold value, dividing a power grid fault risk level, and eva