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Converter power module with direct-current fault self-clearing ability and converter

A power module, DC fault technology, applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., can solve the problem of lack of self-clearing ability of DC fault, and achieve the effect of self-clearing

Inactive Publication Date: 2018-11-27
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a new converter power module and converter with DC fault self-clearing capability for the problem that traditional modular multilevel converters do not have DC fault self-clearing capability

Method used

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  • Converter power module with direct-current fault self-clearing ability and converter

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0046] It should be noted that the term "first\second\third" involved in the embodiment of the present invention is only to distinguish similar objects, and does not represent a specific ordering of objects. Understandably, "first\second\ "Third" can be interchanged for a specific order or sequence where allowed. It should be understood that the terms "first\second\third" are interchangeable under appropriat...

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Abstract

The invention relates to a converter power module with direct-current fault self-clearing ability and a converter, and belongs to the field of power electronics. The converter power module with direct-current fault self-clearing ability comprises a first-level unit, a second-level unit and a third-level unit, wherein a full control type module and a diode are arranged in the first-level unit; a full control type module, a diode and a capacitor are arranged in the second-level unit and the third-level unit; when the power module works normally, the on and off of the full control type module arecontrolled through a control signal, and the required different levels can be output; when a fault occurs, the power module is locked and only has a current path for charging the capacitor; the converter power module is applied to a converter, when the positive pole end and negative pole end of the converter experience a short-circuit fault, all power modules are locked at the same time; since the current path can only charge the capacitors in the power modules, the capacitor voltage rises, then reverse electromotive force is provided to cut the direct-current fault current and eliminate arcchannel at the fault point; therefore, self-clearing of direct-current side fault of the converter is realized.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a converter power module and a converter with DC fault self-clearing capability. Background technique [0002] With the continuous development of power electronic technology, high voltage and large capacity have become an important development direction of power electronic technology, and high voltage and large capacity power electronic converters have important applications in many occasions. [0003] High-voltage, large-capacity multi-level power electronic converters have a variety of topological structures, including two-level structures based on valve series series, diode-clamped multi-level structures, flying capacitor multi-level structures, and combined converters. Converter structure, H-bridge cascaded multilevel structure, modular multilevel converter (Modular Multilevel Converter, MMC) and so on. Among them, the H-bridge cascaded multi-level structure and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/483
CPCH02M7/483
Inventor 刘继权王建武伦振坚彭冠炎
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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