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Multi-link-tower structure modularized multi-level voltage source current converter

A modular multi-level, voltage source converter technology, applied in output power conversion devices, AC power input to DC power output, electrical components and other directions, can solve problems such as stability and shock resistance limit equipment height , to achieve the effect of increasing the height, reducing the project cost and increasing the number of layers

Inactive Publication Date: 2015-08-19
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
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Problems solved by technology

However, such an arrangement is not the best choice when the equipment is required to be compact and reduce the floor space, and its stability and shock resistance also limit the height of the equipment

Method used

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  • Multi-link-tower structure modularized multi-level voltage source current converter

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] The invention provides a modular multi-level voltage source converter with multi-connected tower structure, the structure diagram of which is as follows figure 1 As shown, the modular multilevel converter is composed of three-phase six bridge arms, each bridge arm is composed of multi-connected towers, and the multi-connected towers are composed of at least two valve towers, at least two The two valve towers are connected by a common support to form a whole, and the electrical connection is realized through the busbar; each valve tower is composed of vertically arranged, at least two-layer and back-to-back modular units, and the modular units are composed of cascaded It consists of several sub-modules.

[0019] That is to say, multiple modular units are stacked and arranged back to back to form an independent con...

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Abstract

The invention relates to a multi-level voltage source current converter valve tower combined structure, and specifically relates to a multi-link-tower structure modularized multi-level voltage source current converter; the modularized multi-level current converter comprises three-phase six bridge arms; each bridge arm is formed by multi-link-tower comprising at least two-link valve towers connected through a common support piece; each valve tower comprises at least two layers of module units vertically arranged back to back. The multi-link tower structure expands in a plane direction so as to reduce land occupation and project cost of the current converter, so the current converter can be conveniently designed, made, installed and expanded, thus providing flexible selection schemes for valve hall design.

Description

technical field [0001] The invention relates to a combined structure of a multi-level voltage source converter valve tower, in particular to a modular multi-level voltage source converter with a multi-connected tower structure. Background technique [0002] The core component of the converter, the IGBT, has a voltage level of thousands of volts, and the voltage level of the power grid is much higher than that of the IGBT. In order to realize the commutation, a low-voltage, low-power The basic independent converter module, and then several basic independent converter modules constitute a higher voltage level module unit, and the module unit is expanded to meet the high voltage and high power power transmission occasions. [0003] In the application of power electronics engineering, the realization of the modular multi-level voltage source converter is to use the basic independent converter modules manufactured by several low-voltage power devices, and connect each other in a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/00
Inventor 潘艳李云鹏屈海涛张升栾洪洲
Owner STATE GRID CORP OF CHINA
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