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Three-bridge-arm multi-level converter

A converter and three-leg technology, applied in the field of multi-level voltage source converters, can solve the problems of being unable to double as DC support capacitors, etc.

Pending Publication Date: 2022-07-29
BEIJING EFFICIENGINE TECH LLC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

AAC (also known as SO-AAC) The overlapping area where the upper and lower bridge arms of each phase bridge arm are jointly conducted in the power frequency cycle is generally less than 1 / 10 of the power frequency cycle, while the upper and lower bridge arms of each phase bridge arm of HBSM-AAMC Arms are not turned on at the same time, so the bridge arm sub-module capacitors of both AAC and HBSM-AAMC cannot double as DC support capacitors

Method used

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Embodiment Construction

[0067] The present invention will be further described in detail below with reference to the accompanying drawings. The detailed description, which is set forth in connection with exemplary embodiments of the present invention, includes various details of the embodiments of the present invention to facilitate understanding and should be considered as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted from the following description for clarity and conciseness.

[0068] The invention provides a three-bridge multilevel converter, the converter includes a configurable phase bridge circuit and a configurable DC circuit; the configurable phase bridge circuit and the configurable DC circuit constitute a configurable The configuration cir...

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Abstract

The invention relates to a three-leg multi-level converter (TMC), in which two load legs are used to establish a voltage at an AC end of a phase leg and a current flowing through the AC end, and two ends of the third bridge arm are respectively connected with the two load bridge arms, and the third bridge arm is used for establishing balance current to realize voltage balance of sub-module energy storage units in all electrical components in the converter circuit. According to the three-bridge-arm multi-level converter, by changing the configuration mode of the configurable circuit in the three-bridge-arm multi-level converter, a class of multi-level converters with different topologies and different structures can be obtained, and each phase of bridge arm is composed of three bridge arms. In the multi-level converter, some converters have the advantages of MMC, EO-AAC and other multi-level converters, and the number of sub-modules and the number of semiconductor switches used in the converter are much smaller than those of MMC and EO-AAC of the same level respectively.

Description

technical field [0001] The present invention relates to the field of multi-level power electronic converters, in particular to a three-arm multilevel converter (Tri-arm Multilevel Converter, TMC), in particular to a modular bridge arm with configurable circuits that each phase is composed of three bridge arms. A multi-level voltage source converter composed of arms. Background technique [0002] The switching devices of MMC[1, 2] (Modular Multilevel Converter) have little voltage variation, and can not be turned on and off at the same time, thus eliminating the necessary switching devices for two-level high-voltage converters The problem of dynamic voltage equalization with simultaneous turn-on and turn-off. At the same time, MMC has a modular structure and is easy to expand to a high level, so MMC is widely used in high-voltage fields, especially in the field of high-voltage AC and DC power transmission and distribution. The downsides of MMC are: [0003] There are many ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483H02M7/5387H02M1/14H02J3/36
CPCH02M7/483H02M7/5387H02M1/14H02J3/36
Inventor 郑琼林邵天骢游小杰杨晓峰李凯
Owner BEIJING EFFICIENGINE TECH LLC
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