Tandem 12-pulse rectifier

The invention discloses a series 12-pulse rectifier, and particularly relates to the technical field of rectification. The rectifier comprises a three-phase power supply, an isolation transformer, an inductance unit, a first three-phase full-bridge rectification circuit, a second three-phase full-bridge rectification circuit, an active harmonic suppression circuit, a first direct current side capacitor, a second direct current side capacitor and a load. The active harmonic suppression circuit comprises a switch tube S1, a switch tube S2 and an injection transformer, a primary winding of the injection transformer is provided with a center tap, a first end of the primary winding of the injection transformer is connected with the point D through the switch tube S1, a second end of the primary winding of the injection transformer is connected with the point C, and a third end of the primary winding is connected with the point D through the switch tube S2. The inverter circuit with the center tapped transformer fo