Parallel module unit applied to power electronic transformer

A technology of power electronics and transformers, which is applied in the field of parallel module units, can solve the problems of inability to realize online live hot plugging, low overall heat dissipation efficiency, and inconvenient maintenance, and achieve mechanical and electrical performance guarantees, high reliability, and easy disassembly. The effect of convenience

Pending Publication Date: 2021-11-02
QINGDAO TOPSCOMM COMM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are various forms of module structure, most of which are designed as an integrated structure, which has the problems of inconvenient assembly, low overall heat dissipation efficiency, inability to realize online live hot swapping and inconvenient maintenance

Method used

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  • Parallel module unit applied to power electronic transformer
  • Parallel module unit applied to power electronic transformer
  • Parallel module unit applied to power electronic transformer

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] Such as figure 1 As shown, the overall structure of the system of the present invention adopts the cascaded H-bridge (CHB+DAB) topology, and uses the star connection method to carry out series voltage division of high-voltage modules to solve the problem of insufficient withstand voltage of a single power electronic device (IGBT). Parallel connection to form a low-voltage high-current DC bus (common DC bus), which solves the problem of insufficient current carrying capacity of a single module, has excellent isolation and withstand voltage performance, and realizes bidirectional flow of energ...

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Abstract

The invention relates to the field of power electronics, and particularly provides a parallel module unit applied to a power electronic transformer, which comprises a power module (IGBT), a power unit board, a thermal management assembly, a flexible connection assembly, a fusing loop assembly and a module shell, adopts SCR-DAB topology, and adopts a parallel connection mode to share a direct current bus by multiple modules. The problem of insufficient current-carrying capacity of a single module is solved, and bidirectional energy flow is realized. The modularization degree of internal components is high, and production is convenient; due to the design of a guide rail type base, electrical connection can be rapidly achieved, and the maintainability is high; a flexible socket connection mode is adopted, so that a hot plug function is realized; due to a double-air-duct structure, the overall heat dissipation efficiency of the module is high; the size and weight are small and the power density is high; and a sheet metal part and an insulating part are matched for use, so that the mechanical performance and the electrical performance are effectively guaranteed, and the safety of the module unit is high.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a parallel module unit applied to power electronics transformers. Background technique [0002] With the rapid development of the new energy industry, the demand for diversified grid connection continues to expand. Traditional power frequency transformers cannot meet the diverse needs due to their shortcomings such as large volume and weight, high loss, slow fault response speed, and easy waveform distortion. Power electronic transformers are used as The new type of power distribution equipment can overcome the shortcomings of traditional transformers, realize the basic functions of power conversion and electrical isolation, and take into account multiple functions such as dynamic power adjustment and flexible access to new energy, which better meet the needs of my country's construction of a strong smart grid. [0003] Power electronic transformers usually adopt a modul...

Claims

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Application Information

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IPC IPC(8): H02M7/00H02M3/335H02M1/32H05K7/14H05K7/20
CPCH02M7/003H02M3/33584H02M1/32H05K7/1432H05K7/20909H05K7/20945
Inventor 范建华徐鹏飞肖汝腾刘航刘长鑫
Owner QINGDAO TOPSCOMM COMM
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