Active noise reduction device and method for transformer

The invention relates to an active noise reduction device and method for a transformer, and belongs to the technical field of transformer manufacturing. According to the technical scheme, a transformer tank cover supporting reinforcing rib (9) and a transformer tank bottom supporting reinforcing rib (10) are welded to the inner side of a tank cover and the inner side of the tank bottom of a transformer oil tank (1) respectively, and noise reduction glass fiber reinforced plastic (6) is installed on the transformer oil tank (1) through the transformer tank cover supporting reinforcing rib (9) and the transformer tank bottom supporting reinforcing rib (10). The noise reduction steel sleeve (7) is installed on the transformer oil tank (1) through the transformer tank cover supporting reinforcing ribs (9) and the transformer tank bottom supporting reinforcing ribs (10). The noise-reduction transformer oil tank has the advantages that the noise-reduction glass fiber reinforced plastic, the noise-reduction steel sl