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Bidirectional self-blocking sub-module topological structure and fault ride-through method thereof

A topology and fault ride-through technology, which can be used in automatic disconnection emergency protection devices, emergency treatment AC circuit arrangements, power transmission AC networks, etc., which can solve the problem of inability to balance performance and cost.

Active Publication Date: 2022-01-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the above problems, the present invention proposes a two-way self-blocking sub-module topology and its fault ride-through method, which improves the shortcomings of the existing failover sub-modules that cannot take into account both performance and cost, and ensures high reliability and On the premise of reducing the difficulty of control, compared with the existing failover sub-module, the manufacturing cost and operating cost are reduced

Method used

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  • Bidirectional self-blocking sub-module topological structure and fault ride-through method thereof
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  • Bidirectional self-blocking sub-module topological structure and fault ride-through method thereof

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0061] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0062] In...

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Abstract

The invention belongs to the technical field of multi-level converters, and provides a bidirectional self-blocking sub-module topological structure and a fault ride-through method thereof. The bidirectional self-blocking sub-module topological structure comprises a first half-bridge structure, a second half-bridge structure, a reverse switching tube unit and a follow current thyristor connected to a port of a bidirectional self-blocking sub-module in parallel, wherein the first half-bridge structure comprises a first switching tube unit, a third switching tube unit and a first capacitor, and the second half-bridge structure comprises a second switching tube unit, a fourth switching tube unit and a second capacitor; one end of the reverse switching tube unit is connected with the first switching tube unit and the second switching tube unit; and the other end of the reverse switching tube unit is connected with the third switching tube unit and the fourth switching tube unit. The fault ride-through method comprises a capacitor discharge stage, a fault isolation stage and a restart stage.

Description

technical field [0001] The invention belongs to the technical field of multilevel converters, and in particular relates to a bidirectional self-blocking sub-module topology and a fault ride-through method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Modular Multilevel Converter ( Modular Multilevel Converter , referred to as MMC ) consists of multiple submodules with the same structure ( Sub-Module , for short SM ) cascaded configuration, has become the preferred converter topology for flexible DC transmission systems. [0004] based on MMC Due to its advantages of high power quality, flexibility and controllability, and easy flow reversal, the flexible direct current transmission technology is widely regarded as an effective technology for realizing the effective utilization of wind energy, solar energy and other green renewa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/00H02M7/483H02M7/5387H02M1/32H02M1/36H02H7/26H02H3/07H02J3/36
CPCH02M7/00H02M7/483H02M7/53871H02M1/32H02M1/36H02H7/268H02H3/07H02J3/001H02J3/36Y02E60/60
Inventor 王毅张振
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)