NON-ISOLATED SYMMETRIC SELF-COUPLING 18-PULSE RECTIFIER POWER SUPPLY SYSTEM

摘要

A non-isolated symmetric self-coupling 18-pulse rectifier power supply system comprises a phase-shifting autotransformer, three circuits of output devices, a time sequence controller and a power output end. The phase-shifting autotransformer is provided with three groups of output ends and one group of input ends, and the output device in each circuit comprises a zero-sequence suppression reversing inductor, a three-phase uncontrolled rectifier bridge and a bidirectional switch BUCK converter, which are connected to each other in turn. The time sequence controller is provided with three groups of control ends which are respectively connected to the control end of the bidirectional switch BUCK converter in each circuit. The output end of the bidirectional switch buck converter in each circuit is connected to the power output end.

主权项

1. A non-isolated symmetric self-coupling 18-pulse rectifier power supply system, comprising a phase-shifting autotransformer, three circuits of output devices, a time sequence controller and a power output end; the phase-shifting autotransformer provided with three groups of output ends and one group of input ends A, B and C, the three groups of output ends being output ends A1, B1 and C1 in a leading group, output ends A0, B0 and C0 in an original group, and output ends A2, B2 and C2 in a lagging group, respectively; the three circuits of output devices being an output device in the leading group, an output device in the original group and an output device in the lagging group, respectively; the output device in the leading group including a zero-sequence suppression reversing inductor in the leading group, a three-phase uncontrolled rectifier bridge in the leading group and a bidirectional switch BUCK converter in the leading group, which are connected to each other in turn; the output device in the original group including a zero-sequence suppression reversing inductor in the original group, a three-phase uncontrolled rectifier bridge in the original group and a bidirectional switch BUCK converter in the original group, which are connected to each other in turn; and the output device in the lagging group including a zero-sequence suppression reversing inductor in the lagging group, a three-phase uncontrolled rectifier bridge the lagging group and a bidirectional switch BUCK converter in the lagging group, which are connected to each other in turn; the time sequence controller provided with three groups of control ends which are respectively connected to the control end of the bidirectional switch BUCK converter in the leading group, the control end of the bidirectional switch BUCK converter in the original group and the control end of the bidirectional switch BUCK converter in the lagging group; and the output end of the bidirectional switch BUCK converter in the leading group, the output end of the bidirectional switch BUCK converter in the original group and the output end of the bidirectional switch BUCK converter in the lagging group being all connected to the power output end.