Low voltage filtering compensation cabinet

Abstract

The invention relates to a low voltage filtering compensation cabinet comprises a cabinet body and a filtering compensation device. Air inlets are arranged at lower portions of a front cabinet door and a rear cabinet door of the cabinet body; an air outlet is arranged at a top portion of the cabinet body; an air-discharge fan is arranged in the air outlet; a blowing fan is arranged at a bottom inside the cabinet; and two separator plates are arranged at two sides of the blowing fan. Besides, the filtering compensation device is arranged inside the cabinet body and comprises a low voltage distribution system, a detection unit, a central control unit and a switching device; the low voltage distribution system is connected with the detection unit by a voltage signal and a current signal; and the detection is connected with the central control unit that is connected with the switching device. According to the invention, advantages of the low voltage filtering compensation cabinet are as follows: reactive compensation can be realized; harmonic waves can be filtered; system resonance can be prevented; and air flows inside the cabinet form an ordered laminar flow due to utilization of an air-discharge fan, so that a good heat radiation effect is realized.

Description

technical field [0001] The invention relates to a power distribution cabinet, in particular to a power distribution cabinet for arranging a filter compensator. Background technique [0002] Low-voltage power supply systems such as residential areas and offices, due to the existence of a large number of nonlinear loads (such as frequency converters, rectifiers, household appliances and office equipment) in the electrical load, will generate a large number of high-order harmonics ( frequencies higher than 50Hz, hereinafter referred to as harmonics). These harmonics not only pollute the power grid and endanger equipment operation, but also add additional active losses to waste electrical energy. The best way to control harmonics to purify the power grid and improve the power factor to save energy is to use a filter compensation device. The filter branch and filter compensation capacity of the traditional low-voltage filter compensation device are determined according to the l...

AI Technical Summary

Problems solved by technology

When the load in the power supply system changes, the device cannot meet the original technical requirements, so it cannot meet the needs

[0003] The filter branches of the traditional low-voltage filter device are scattered in the cabinet, which makes the maintenance very complicated and inconvenient, and takes a long time, resulting in a long shutdown time of the device, which affects the user's production and power saving benefits , it is inconvenient to use and maintain, which brings troubles to the industry

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