A high voltage module for power electronic traction transformer

Abstract

The invention provides a high-voltage module for a power electronic traction transformer, and the high-voltage module comprises: an insulating housing, wherein the upper, lower, left and right surfaces of the insulating housing are all closed, at least one part of the rear surface is an open surface, and the outer side edges of the front surface and the rear surface are respectively provided witha concentric-square-shaped groove structure; an internal frequency conversion machine core, wherein the internal frequency conversion machine core and the insulating shell are of a nested structure, and the internal frequency conversion module at least comprises a water-cooling heat dissipation assembly, an IGBT assembly, a busbar, a driving assembly, a direct-current capacitor, a control part anda water-electricity integrated rapid plug-pull connector, the water-electricity integrated rapid plug-pull connector is led out from the rear surface, the water-cooling heat dissipation assembly is located in the middle of the high-voltage module and divides high-voltage module into a left area and a right area, cascade side high-voltage IGBTs and inversion side high-voltage IGBTs in the IGBT assembly are arranged on the two sides of the water-cooling heat dissipation assembly respectively, and the IGBT assembly, the busbar and the IGBT driving assembly are sequentially arranged outwards fromthe left side to the right side of the water-cooling heat dissipation assembly.

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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