Converter transformer for high-voltage direct current transmission

The converter transformer comprises a transformer body, an outer box, a noise reduction device and a supporting plate, the outer box is arranged to be of a double-layer structure, the noise reduction device used for reducing noise is arranged in an interlayer of the outer box, a temperature sensor and a controller are installed on the inner wall of the outer box, and the supporting plate is arranged on the outer box. An air guide pipe is arranged on the side face of the outer box, a fan is installed on the inner wall of the air guide pipe, a heat dissipation through groove is formed in the outer box, and a baffle is arranged on the side face of the heat dissipation through groove; a supporting plate is installed in the outer box, the transformer body is installed at the top end of the supporting plate, a plurality of damping springs arranged at equal intervals are connected to the bottom end of the supporting plate, and connecting grooves matched with the damping springs are formed in the transverse inner wal