Transformer cooling system

The utility model belongs to the technical field of transformer heat dissipation, and particularly relates to a transformer cooling system which comprises a transformer shell and a refrigerating device located outside the transformer shell. A water cooling mechanism is arranged in the transformer shell, the water cooling mechanism comprises a coil pipe close to the inner wall, a water inlet of the coil pipe is connected with a water inlet of the transformer shell, and a water outlet of the coil pipe is connected with a water outlet of the transformer shell; the water inlet of the transformer shell is connected with a water inlet pipe; the transformer shell is further provided with an air cooling mechanism, the air cooling mechanism comprises a fan, and the fan is connected with the air inlet of the transformer shell through an air inlet pipe; the water inlet pipe and the air inlet pipe are both connected with the refrigerating device; the transformer further comprises a temperature sensor located in the trans