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A novel T-shaped sub-module and its topology structure

A topology and sub-module technology, which is applied to output power conversion devices, electrical components, emergency protection circuit devices, etc. The effect of improving blocking ability and improving fault blocking speed

Inactive Publication Date: 2019-01-22
CHINA ELECTRIC POWER RES INST +2
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AI Technical Summary

Problems solved by technology

Compared with the topology based on the half-bridge sub-module (HBSM), the topology based on the full-bridge sub-module (FBSM) has the strongest fault blocking capability, but the number of switches is doubled. (CDSM) topology has relatively fewer switches than the topology based on the full-bridge sub-module (FBSM). However, the topology based on the clamp-type dual sub-module (CDSM) has a low capacitance utilization and latch-up Poor ability

Method used

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  • A novel T-shaped sub-module and its topology structure
  • A novel T-shaped sub-module and its topology structure
  • A novel T-shaped sub-module and its topology structure

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038]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.

[0039] A novel T-shaped sub-module provided by the invention, such as figure 1 As shown, the T-shaped sub-module includes:

[0040] The first IGBT S 1 , the second IGBT S 2 , the third IGBT ...

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Abstract

The invention relates to a novel T-type sub-module and a topological structure thereof. The T-type sub-module comprises a first IGBT, a second IGBT, a third IGBT, a first RB-IGBT, a second RB-IGBT, afirst diode, a second diode, a third diode, a fourth diode, a first capacitor, and a second capacitor. The T-type sub-module with DC fault blocking capability provided by the invention improves the fault current blocking capability of the topology with fewer switching devices.

Description

technical field [0001] The invention relates to the field of flexible direct current transmission, in particular to a novel T-shaped sub-module applied to a modular multilevel converter and its topological structure. Background technique [0002] Flexible DC transmission technology is a new generation of power transmission technology, which has been promoted and applied in some countries. Among them, Modular Multilevel Converter (MMC) is an important component of flexible DC transmission technology. . [0003] At present, all MMC sub-modules in flexible direct current transmission adopt the half-bridge sub-module (Half-Bridge Sub-Module, HBSM) topology. The capacitor charging of the half-bridge sub-module (HBSM) can provide a reverse electromotive force to block the fault current, but in the negative current direction, the anti-parallel diode of the lower bridge arm IGBT of the half-bridge sub-module (HBSM) provides a path for the fault current At this time, the system doe...

Claims

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Application Information

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IPC IPC(8): H02M7/483H02H7/122
CPCH02H7/1225H02M7/483H02M7/4835
Inventor 庄俊李官军杨波陶以彬周晨南国良宋宁希
Owner CHINA ELECTRIC POWER RES INST
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