Unlock instant, AI-driven research and patent intelligence for your innovation.

A new topology structure of mmc sub-module

A topology and sub-module technology, applied in the direction of output power conversion devices, electrical components, emergency protection circuit devices, etc., can solve the problems of complex control, long recovery time, and bulky volume of converter sub-modules, and improve power supply Reliability, MMC size reduction, simple effect

Active Publication Date: 2021-10-26
HUNAN UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new topological structure of MMC sub-modules, which can not only output three levels and have fault current blocking ability, but also solve the problems of complex control, bulky volume and The system adopts the circuit breaker to realize fault isolation, and the action is slow and the recovery time is long

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A new topology structure of mmc sub-module
  • A new topology structure of mmc sub-module
  • A new topology structure of mmc sub-module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0028] The purpose of the present invention is to provide a new topological structure of MMC sub-modules, which can not only output three levels and have fault current blocking ability, but also solve the problems of complex control, bulky volume and The system uses a circuit breaker to achieve fault isolation, which is slow and takes a long time to recover.

[0029] figure 1 It is a composition diagram of the new topological structure of the MM...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a new topological structure of an MMC submodule. The sub-module topology includes 2 diodes, 6 IGBTs and 2 capacitors; the 2 diodes are respectively connected in antiparallel to the 2 IGBTs to form a control switch to control the on-off of the charging and discharging circuits of the 2 capacitors, so that the sub-modules of the MMC Module output 0, V c / 2 and V c Three levels; the remaining 4 IGBTs are connected in anti-parallel in pairs to form a fault current blocking circuit, thereby blocking the fault current. The invention adopts a new sub-module topology, compared with the traditional MMC, it can output more levels under the same number of sub-modules, and when the MMC has a DC or AC fault, it can quickly cut off the fault current path and realize the MMC fault current blocking.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a new topological structure of an MMC sub-module. Background technique [0002] Modular multilevel converter (MMC) based on fully controlled power electronic devices is highly modular, easy to expand, low conduction loss, high quality voltage waveform, and can independently control active power and power , no commutation failure and other advantages, since it came out, it has attracted great attention in the industry and academia. At present, MMC is widely used in flexible DC transmission, distributed power generation, electric track traction, static var compensation, motor drive, power quality management and other fields. [0003] When MMC is applied in the field of flexible DC transmission, in order to obtain good voltage waveform quality, in principle, the more levels of the output voltage the better, while the traditional half-bridge sub-module can only output two levels of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483H02H7/122
CPCH02H7/122H02M7/483
Inventor 张志文候维杨贺锐智黄守道
Owner HUNAN UNIV