High-capacity three-phase combined phase-shifting transformer

The utility model relates to a high-capacity three-phase combined phase-shifting transformer. The high-capacity three-phase combined phase-shifting transformer comprises three single-phase transformers which respectively serve as phases A, B and C to be combined into a three-phase transformer, wherein each single-phase transformer comprises a series transformer and an exciting transformer; the series transformer and the exciting transformer are arranged in the same oil tank and are divided into two independent device body parts; the series transformer of each phase comprises a series coil and an excitation coil; each exciting transformer comprises a voltage regulating excitation coil and a voltage regulating coil; the head end of the voltage regulating excitation coil is connected with a central tap of each series coil in the series transformer of the same phase, and the tail end serving as a neutral point is led out of the oil tank; the head end of the voltage regulating coil is led out of the oil tank to be connected with an angular node of other two excitation coils, and the tail end serving as a neutral point is led out of the oil tank. The high-capacity three-phase combined phase-shifting transformer disclosed by the utility model is simple in structure, the voltage classes of tap switches can be reduced, the connection structure between adjacent device bodies can be simplified, the mounting difficulty is reduced, and the phase-shifting transformer has high practicality in high-capacity and high-voltage class phase-shifting transformer.