A compact air-cooled static inverter power cabinet

Abstract

The invention discloses a compact air-cooled static frequency converter power cabinet, which includes a cabinet body. The cabinet is provided with a hybrid press-connected thyristor valve string, a fan, an air duct, and an AC / DC copper bar. The thyristor valve string adopts According to the phase sequence, the thyristors of one phase of the machine and the network bridge are mixed and pressed into one valve string; the thyristor valve string is vertically installed on the right front side of the cabinet, and the fan is set on the thyristor valve string On the left side, the fan is connected to the thyristor valve string through the air duct; the AC / DC copper bar is connected to the thyristor valve string. The invention solves the problems that the power cabinet of the existing static frequency converter is too large, the wiring of the main circuit is complicated, and the maintenance is difficult.

Description

technical field [0001] The invention relates to a compact air-cooled static frequency converter power cabinet, which belongs to the technical field of cabinet body design. Background technique [0002] The static frequency converter is a frequency converter composed of power devices and DC reactors. It controls the frequency of the power supply by controlling the on and off of the semiconductor power unit, and can smoothly drag the generator rotor from static to rated speed. At present, the main It is used in the field of gas power generation and hydropower generation. [0003] A conventional static frequency converter system usually consists of a control unit, a bridge unit, a bridge unit, a reactor and a switch, where the bridge and the bridge unit are power units. Existing manufacturers of static frequency converters distinguish the thyristors by bridges, press-fit the thyristors on the bridge side and the thyristors on the bridge side respectively, and place them in one...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the problems that the existing static inverter power cabinet is too large, the wiring of the main circuit is complicated, and the maintenance is difficult. The present invention provides a compact air-cooled static inverter power cabinet. Reasonable crimping method, mixing and crimping the thyristors of one phase of the machine bridge and network bridge into a thyristor valve string, and installing the three-phase hybrid crimping type thyristor valve strings in a power cabinet, which makes the main circuit wiring easier and greatly The size of the power cabinet is reduced, and the inspection and maintenance are more convenient

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