Voltage transformer fault diagnosis method, device, equipment and medium

The invention belongs to the technical field of equipment fault diagnosis, and particularly discloses a voltage transformer fault diagnosis method and device, equipment and a medium. Comprising the following steps: acquiring time sequence voltage data of a secondary side of a voltage transformer, and converting the time sequence voltage data into two-dimensional image data; the time sequence voltage data and the two-dimensional image data are segmented respectively, and image features and time sequence features are calculated according to the segmented time sequence voltage data and the segmented two-dimensional image data; performing feature enhancement on the image features and the time sequence features, and performing multi-granularity contrast learning according to the enhanced image features and time sequence features to obtain enhanced image features and enhanced time sequence features; and fusing the enhanced image features and the enhanced time sequence features to obtain fusion features, and inputti