Fault mode identification method, device and equipment for oil-immersed power transformer and medium

The invention discloses an oil-immersed power transformer fault mode recognition method, device and equipment and a medium, and relates to the technical field of variable pressure fault recognition, and the method comprises the steps: carrying out the sample selection of various types of gas concentration samples corresponding to different fault modes of an input initial transformer through a feature selection layer of an initial fault mode detection model, constructing gas ratio characteristics under a preset dimension based on the selected target gas concentration sample, and screening the gas ratio characteristics according to the characteristic importance score to obtain target gas ratio characteristics; inputting the target gas ratio characteristics into a fault diagnosis layer of an initial fault mode detection model, and training the initial fault mode detection model by using the target gas ratio characteristics to obtain a target fault mode detection model; and inputting the type information and the