Frequency response characteristic fault positioning method for transformer winding deformation test

Abstract

The invention provides a frequency response characteristic fault positioning method for a transformer winding deformation test, and belongs to the technical field of transformers, and the method comprises the steps: constructing a transformer winding deformation test device to carry out sweep frequency signal excitation and frequency response data collection, carrying out the preprocessing of the collected frequency response data, and eliminating the noise interference; through setting short-circuit connection schemes at different positions, fault states are simulated to obtain comparison data, and a fault characteristic index vector is constructed based on purified frequency response characteristic data. A mapping relation database of fault features and deformation types is established, and the fusion weight of the input hierarchical feature fusion model is adjusted through a gating weight function to realize intelligent identification of fault types and degrees; and according to an identification result, the measurement precision of a fault sensitive frequency band is improved by adopting segmented frequency sweep optimization, and the specific position coordinates of the fault are determined by applying wavelet transform time-frequency analysis, so that the technical problem that the transformer winding deformation fault positioning precision is not high is solved.

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