Distribution network small current ground fault location method based on hierarchical closing

The present invention discloses a distribution network small current ground fault location method based on hierarchical closing. The method comprises the steps of: establishing a distribution networkearth fault location hierarchical switch matrix DFLM to describe a remote control switching hierarchical model of a feeder of a distribution network; establishing a single-layer switch closing sequence list SLST to describe a remote control closing motion sequence of a single-layer switch; performing necessary regulation of the switching sequence in the single-layer switch closing sequence list SLST; and performing hierarchical closing processing of distribution network ground faults according to the distribution network ground fault location hierarchical switching matrix DFLM and the regulated single-layer switch closing sequence list SLST until a ground fault area is found. The method provided by the invention has good application in the areas with wide traditional remote control terminal configuration and few s