Power distribution network fault area positioning method and system based on big data

The invention relates to the technical field of fault positioning, and particularly discloses a power distribution network fault area positioning method and system based on big data, and the method comprises the steps: 1, obtaining a fault coefficient of each power distribution network sub-area in a detection period; 2, evaluating whether the sub-regions of the power distribution network have faults or not, and generating fault evaluation signals; 3, analyzing a single power distribution network sub-region, and obtaining an abnormal coefficient of the power distribution network sub-region in a target time period; 4, evaluating whether the power distribution network sub-regions fluctuate abnormally or not, and generating an abnormal evaluation signal; 5, adjusting the detection period of the power distribution network sub-regions based on the power distribution network sub-region fluctuation abnormal signal; according to the invention, when the power distribution network has an abnormal condition, a response c