Distributed low-voltage distribution network tail end low-voltage treatment device

Abstract

The invention discloses a distributed low-voltage power distribution network tail end low-voltage treatment device. The device comprises a rectifying device and an inverting device, wherein the input side of the rectifying device is connected with the output side of a power distribution network transformer, three-phase alternating current is boosted and rectified into direct current, and the output side of the rectifying device is connected with the input side of the inverting device; the input side of the inversion device is connected with the output side of the rectification device to invert direct current into single-phase alternating current, and the output side is connected with a user. Through the alternating current-direct current-alternating current conversion technology, the length of a single-phase alternating current distribution line is remarkably shortened, and the tail end voltage quality is improved; after low-voltage alternating-current power distribution is boosted into direct-current power distribution, the line impedance and the current flowing through the line are reduced, and line loss is remarkably reduced. The device is convenient to install, existing power distribution lines can be fully utilized, cables do not need to be laid again, and comprehensive transformation cost is saved.

Description

technical field [0001] The invention relates to the technical field of voltage control of low-voltage distribution networks, in particular to a terminal low-voltage control device of a distributed low-voltage distribution network. Background technique [0002] With the improvement of residents' living standards, the types and quantities of household appliances continue to increase, and the requirements for the voltage quality of distribution networks have become an important test for power supply companies. The national standard "Power Quality Supply Voltage Deviation" (GB / T 12325-2008) stipulates that the 220V single-phase power supply voltage deviation is within +7% and -10% of the nominal voltage. However, in some relatively remote mountainous areas and rural areas, the problem of low voltage at the end of the distribution network is common, and the contradiction between power supply capacity and electricity demand is very prominent, and the overall characteristics are ob...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies and defects of the existing technology, the present invention provides a distributed low-voltage distribution network terminal low-voltage control device, based on the existing distribution network, through the power electronic conversion technology, the traditional AC power distribution is boosted For DC power distribution, solve the problem of low voltage at the end of AC low-voltage long-distance transmission, and improve the quality of terminal voltage; adopt boosted DC power distribution, reduce line impedance and current, and reduce line loss; make full use of existing power distribution lines ,Equipment installation and construction are convenient, reducing the cost of comprehensive transformation

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