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

Abstract

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 data of a power grid so as to determine the single-phase ground fault line selection of the power distribution network; Softmax regression model corresponding to the optimal parameter is used to predict the fault type and a position according to the real-time fault data of the grid to determine the one-way ground fault line selection of the distribution network. The Softmax regression model is trained and verified through the data, so that the data processing capability and the line selection accuracy are improved, and development and application of a novel power distribution terminal are promoted.

Description

Technical field [0001] The invention relates to the technical field of risk analysis and control of distribution networks, and more specifically, to a method and system for determining single-phase grounding fault line selection in a distribution network based on Softmax. Background technique [0002] The problem of low-current grounding is a worldwide problem. At present, the main difficulties in fault identification are: first, single-phase grounding with small current, small fault current, difficult to detect; second, complex system structure, different neutral grounding methods, and different fault locations , Different types of faults lead to different fault characteristics, and the detection threshold is difficult to set; third, the fault characteristic signals undergo refraction and reflection in the network, which overlap and interfere with each other, and it is not easy to separate meaningful characteristic quantities. [0003] At the same time, the main reasons for the po...

AI Technical Summary

Problems solved by technology

[0007] The present invention proposes a method and system for determining the line selection of a single-phase grounding fault in a distribution network based on Softmax, so as to solve the problem that the faulty route cannot be accurately determined

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