Modular multilevel converter, fault ride-through method and electronic equipment

A modular multi-level, inverter technology, applied in the power field, can solve the problems of large volume and high cost, and achieve the effect of reducing the number of uses, reducing volume and cost, and good fault ride-through capability

Active Publication Date: 2022-01-14
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, embodiments of the present invention provide a modular multilevel converter, a fault ride-through method

Method used

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  • Modular multilevel converter, fault ride-through method and electronic equipment
  • Modular multilevel converter, fault ride-through method and electronic equipment
  • Modular multilevel converter, fault ride-through method and electronic equipment

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Embodiment Construction

[0053] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0054] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0055] Aiming at the problem of lightweight MMC converters, domestic and foreign scholars have done a lot of research in recent years. Although many MMC topologies based on half bridge submodules (HBSM) have been proposed, they can reduce the volume of the converters, b...

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Abstract

The invention is suitable for the technical field of electric power, and provides a modular multilevel converter, a fault ride-through method and electronic equipment. The modular multilevel converter is of a three-phase topological structure, the topological structures of all phases are the same, and each phase topology comprises an upper bridge arm, a common bridge arm, a lower bridge arm and a bridge arm change-over switch; the upper bridge arm, the common bridge arm and the lower bridge arm are sequentially connected in series, each phase topology of the modular multilevel converter is designed to be of a bridge arm multiplexing structure, the use number of sub-modules in the bridge arms can be reduced, and the size and cost of the modular multilevel converter are reduced; meanwhile, a certain proportion of full-bridge sub-modules are connected in series in the upper and lower bridge arms or the common bridge arm to form an FHF type topological structure or an HFH type topological structure, and the modular multilevel converter is also ensured to have good fault ride-through capability.

Description

technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a modular multilevel converter, a fault ride-through method and electronic equipment. Background technique [0002] With the introduction of the concept of a new power system with new energy as the main body, flexible DC transmission with the characteristics of low harmonic content, power supply to passive networks, and independent control of active power and reactive power has a good development prospect. Among them, the modular multilevel converter (MMC) is expected to become the mainstream converter topology of the future flexible DC transmission and distribution system due to its advantages of high output voltage quality, flexible control and easy expansion. [0003] However, with the increase of voltage level and transmission power, the disadvantages of MMC converter station, such as large weight and high investment cost, are becoming more and more obviou...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02M7/483H02M7/5387H02J3/36H02J3/00
CPCH02M7/219H02M7/483H02M7/53875H02J3/36H02J3/001Y02E60/60H02M7/48
Inventor 王毅高玉华王琛魏子文
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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