High-voltage coil for internal water cooled transformer

The invention belongs to the technical field of electric transformers, and particularly relates to a high-voltage coil for an internal water cooled transformer. The high-voltage coil comprises multiple coil windings (1) which are sequentially arranged from top to bottom. The high-voltage coil is characterized in that each coil winding (1) is formed by winding a hollow wire (11), insulation materials (14) are arranged between coil layers formed by winding the hollow wires (11), and the start end (111) and the tail end (112) of the hollow wire (11) of each coil winding (1) are provided with a water path outlet head (12) and a circuit outlet head (13); when the transformer runs, water paths of the coil windings are connected in parallel to run, and circuits of the coil windings are connected in series to run. When the high-voltage coil for the internal water cooled transformer is in use, the hollow wires can be filled with deionized cooling water, deionized cooling water sources are made to flow through a heat exchanger constantly for heat exchange to remove heat produced by the coil windings, the steps are repeatedly performed, and therefore the coil of the transformer is rapidly cooled.