Small current grounding system fault line selection method based on GBDT algorithm

The invention discloses a small-current grounding system fault line selection method based on a GBDT algorithm, relates to a grounding system fault line selection method, and aims to solve the problem that an existing small-current grounding system line selection method is poor in universality. A training set is obtained, the input of the training set is characteristic values of a voltage signal and a current signal of a small current grounding system, and the output of the training set is a line fault type; constructing a GBDT initial model; training the constructed GBDT initial model by using the obtained training set to obtain a GBDT prediction model; and acquiring a voltage signal and a current signal of a to-be-detected small current grounding system, inputting the voltage signal and the current signal to the obtained GBDT prediction model, obtaining a line fault type by using the GBDT prediction model, and completing fault line selection. The beneficial effect is that the fault tolerance, the accuracy a