Single-column 750kV single-phase autotransformer suitable for railway transportation

A transformer body is arranged in a main oil tank and comprises an iron core and coils, the iron core comprises two side columns and a core column, the core column is provided with a low-voltage coil, a common coil and a series coil, the first side column of the iron core is provided with an excitation coil and a voltage regulating coil, and the second side column of the iron core is provided with a voltage regulating coil. A second side column of the iron core is not provided with a coil, a plurality of sleeves are arranged on the upper side of the main oil tank, outgoing lines of the coils are led out through the corresponding sleeves respectively, the high-voltage sleeves are directly fixed to the main oil tank, the included angle N degrees is formed between the center line of the transformer body and the center line of the main oil tank, and an extending part is formed in the position, corresponding to the high-voltage sleeves, of the main oil tank. According to the 750kV single-phase autotransformer, the