Transformer winding deformation fault judgment method

The invention relates to a transformer winding deformation fault judgment method, and relates to the field of electrical equipment. The method comprises the following steps: S1, setting a plurality ofgroups of winding faults of different types and degrees by a transformer model, and solving to obtain corresponding electrical parameters; S2, establishing a winding equivalent circuit model; S3, combining the electrical parameters and the equivalent circuit model to obtain frequency response curve data of each group of winding faults; S4, calculating an RED value according to the frequency response curve data; S5, calculating an MMR value according to the RED value; S6, comparing the MMR value with a preset value, and when the MMR value is larger than the preset value, judging that axial displacement occurs. According to the scheme, the technical problem of how to improve the diagnosis effect when axial and radial deformation faults happen to the transformer winding at the same time is solved, and the method is