Method and system for determining single-phase ground fault line selection of power distribution network based on Softmax

The invention discloses a method and a system for determining single-phase ground fault line selection of a power distribution network based on Softmax. The method comprises the following steps: acquiring fault data of each of multiple preset nodes of a line in the power distribution network; processing the fault data to obtain fault characteristic data, and establishing fault identifiers and a fault characteristic database; dividing the fault identifiers and the data in the fault characteristic database into a training set and a testing set according to the types of faults, and according to the preset number of iterations, performing line selection identification training by using a Softmax regression model and the training set to determine optimal parameters so as to determine the Softmax regression model corresponding to the optimal parameters; by virtue of the Softmax regression model corresponding to the optimal parameters, predicting the types and the positions of the faults according to real-time fault