Topological structure of double-clamping subunit and converter

A topology and clamping technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problem of affecting the normal operation of the MMC converter, destroying the current path of the MMC converter, Issues affecting the symmetry of the upper and lower clamp subunits

Pending Publication Date: 2019-04-16
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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Problems solved by technology

At this stage, in order to meet the requirements of modularization in the project, the upper and lower clamp modules need to be separated independently in terms of structure and secondary power supply. This structure affects the symmetry of the upper clamp and lower clamp subunits, and the drive circuit is in the second

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  • Topological structure of double-clamping subunit and converter
  • Topological structure of double-clamping subunit and converter
  • Topological structure of double-clamping subunit and converter

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Embodiment Construction

[0049] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] The topological structure of a double-clamp subunit provided by the present invention, such as figure 2 shown, including:

[0052] An upper clamping module, a lower clamping module, a...

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Abstract

The invention relates to a topological structure of a double-clamping subunit and a converter. The topological structure comprises an upper clamping module, a lower clamping module, a first guiding switch tube, a second guiding switch tube, a bypass switch T1 and a bypass switch T2. The topological structure of the double-clamping subunit is capable of reducing the overcurrent risk of the guidingswitch tubes; and when one clamping module is seriously faulted, the other clamping module can work continuously, so as to ensure the stable system operation, facilitating the independent separation of the upper clamping module and the lower clamping module, and providing convenience for large-scale production and application.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a topology structure of a double-clamp subunit and a converter. Background technique [0002] DC short-circuit fault is a common fault in MMC-HVDC systems and flexible substations. It is currently the most widely used method to clear the DC short-circuit fault current through the control of the converter itself. [0003] At present, the double-clamp sub-module structure is mainly used in engineering to realize the self-clearing of faults. Its topology is as follows: figure 1 As shown, including five switches, two diodes and two capacitors. At this stage, in order to meet the requirements of modularization in the project, the upper and lower clamp modules need to be separated independently in terms of structure and secondary power supply. This structure affects the symmetry of the upper clamp and lower clamp subunits, and the drive circuit is in the secondary There are also cont...

Claims

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Application Information

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IPC IPC(8): H02M7/00H02M7/487H02M1/32
CPCH02M1/32H02M7/00H02M7/487H02M1/325H02M7/4835
Inventor 邓占锋周哲赵国亮徐云飞徐少博李卫国刘海军卜宪德乔光尧康伟石秋雨卢娟娟李芳义
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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