Three-phase AC-DC converter circuit and conversion method and control system thereof

摘要

The embodiment of present invention provides a three-phase AC (Alternating Current)-DC (Direct Current) converter circuit, conversion method and the control system thereof. The converter circuit includes a three-phase AC power source having a first output terminal, a second output terminal and a third output terminal; a first AC-DC conversion module, a second AC-DC conversion module and a third AC-DC conversion module electrically connected to the first output terminal, the second output terminal and the third output terminal of the three-phase AC power respectively, and respectively have N1 pieces, N2 pieces and N3 pieces of AC-DC converters which are connected in parallel; and a DC side output terminal electrically connected to the parallel-connected output terminals of the first AC-DC conversion module, the second AC-DC conversion module and the third AC-DC conversion module, wherein at least one of N1, N2 and N3 is greater than or equal to 2.

主权项

1. A three-phase AC (Alternating Current)-DC (Direct Current) converter circuit, comprising:
a three-phase AC power source comprising a first output terminal, a second output terminal and a third output terminal used for outputting a three-phase alternating current; a first AC-DC conversion module electrically connected to the first output terminal of the three-phase AC power source, the first AC-DC conversion module comprising N1 number of AC-DC converters connected in parallel; a second AC-DC conversion module electrically connected to the second output terminal of the three-phase AC power source, the second AC-DC conversion module comprising N2 number of AC-DC converters connected in parallel; a third AC-DC conversion module electrically connected to the third output terminal of the three-phase AC power source, the third AC-DC conversion module comprising N3 number of AC-DC converters connected in parallel; a DC side output terminal electrically connected to output terminals of the first AC-DC conversion module, the second AC-DC conversion module and the third AC-DC conversion module connected in parallel for outputting a DC voltage; wherein N1, N2 and N3 are all natural numbers, and at least one of N1, N2 and N3 is greater than or equal to 2.