Converter apparatus and its short-circuit protection method

Converter apparatus and its short-circuit protection method

  • CN 107,580,737 A
  • Filed: 04/02/2015
  • Published: 01/12/2018
  • Est. Priority Date: 04/02/2015
  • Status: Active Application
First Claim
Patent Images

1. a kind of converter apparatus (1), including:

  • First phase module branch road (8) of-the first series circuit with bipolar submodule (14), submodule include at least one respectivelyIndividual energy accumulator (31) and at least one power semiconductor switch (29), wherein, the first phase module branch road (8) is in the first exchangeExtend between voltage jointer (3) and the first DC voltage pole (51);

    Second phase module branch road (9) of-the second series circuit with bipolar submodule (14), wherein, the second phase module branch road(9) extend between the first alternating voltage joint (3) and the second DC voltage pole (61);

    The third phase module branch road (10) of-the 3rd series circuit with bipolar submodule (14), wherein, third phase module branch road(10) extend between the second alternating voltage joint (4) and the first DC voltage pole (51);

    4th phase module branch road (11) of-the 4th series circuit with bipolar submodule (14), wherein the 4th phase module branch road(11) extend between the second alternating voltage joint (4) and the second DC voltage pole (61),Wherein, each submodule (14) can by be connected thereto bridge-jointing unit (33) that terminal (26,27) is arranged in parallel withThe sense of current is independently bridged, and wherein, the first DC voltage pole (51) is connected with the first DC voltage joint (5), andAnd second DC voltage pole (61) be connected with the second DC voltage joint (6),It is characterized in that- DC voltage switchs (16), and it is arranged between the first DC voltage pole (51) and the first DC voltage joint (5) or theBetween two DC voltage poles (61) and the second DC voltage joint (6), and- free wheeling path (22), it extends between two DC voltage joints (5,6) and is switched off and on direction including havingSemiconductor element (23).

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