Parallel module unit applied to power electronic transformer

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...

AI Technical Summary

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

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