Charging and distribution combined urban rail box transformer substation line system and charging transformer

The utility model provides a charging and power distribution combined urban rail box-type transformer substation line system and a charging transformer, and relates to the technical field of urban rail traffic charging and power distribution design, the urban rail main supply box-type transformer substation line system comprises a main power supply, a box-type transformer substation and a charging rack, after the box-type transformer substation takes power from the main power supply, the box-type transformer substation is used for charging an urban rail through the charging rack; the first main power supply supplies power to the box-type substation, a low-voltage side of a charging transformer in the box-type substation adopts three-split distribution windings, one distribution winding is connected with a neutral line, an output end of the distribution winding is connected with an alternating-current power supply bus, and output ends of the other two distribution windings are arranged in parallel. After the c