A high-voltage module for power electronic traction transformers

Abstract

The present invention provides a high-voltage module for power electronic traction transformers, comprising: an insulating casing, the upper, lower, left, and right sides of the insulating casing are all closed, at least a part of the rear surface is an open surface, the front surface and the The outer edge of the rear surface has a back-shaped groove structure; the internal frequency conversion core, the internal frequency conversion core and the insulating shell are a nested structure, and the internal frequency conversion module at least includes water cooling components, IGBT components and busbars, Drive components, DC capacitors, control components, water and electricity integrated quick plug connector; wherein, the water and electricity integrated quick plug connector is drawn from the rear surface; the water cooling and heat dissipation assembly is located in the middle of the high voltage module, and the The high-voltage module is divided into left and right areas, and the cascade-side high-voltage IGBT and inverter-side high-voltage IGBT in the IGBT assembly are respectively placed on both sides of the water-cooled heat dissipation assembly, and the water-cooled heat dissipation assembly is directed toward the left and right sides. The externally arranged components are the IGBT assembly, the busbar and the IGBT drive assembly in sequence.

Description

technical field [0001] The invention relates to the current conversion technology of a power electronic traction transformer, in particular to a high-voltage module used for a power electronic traction transformer. Background technique [0002] With the development of high-power power electronic components and control technology, a new type of transformer that realizes voltage conversion and energy transfer through power electronic conversion technology - power electronic traction transformer PETT (power electronic traction transformer) has attracted more and more attention. It can be used It is suitable for replacing heavy and bulky power frequency traction transformers. Due to the limited installation space of the traction equipment and the very high voltage of the railway power supply network, the design of the PETT device is quite difficult. At present, there is no PETT application performance in China. The PETT devices designed and manufactured by foreign manufacturers...

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Problems solved by technology

At present, there is no PETT application performance in China. The PETT devices designed and manufactured by foreign manufacturers are only used on 15kV, 16.67Hz lines; my country's railway power supply network is 25kV, 50Hz lines, the voltage and frequency are higher, and the insulation design is extremely difficult. The gain in weight reduction and volume reduction brought about by the increase in frequency is relatively small, and the design of the PETT device is extremely challenging

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