Low-voltage management system of power distribution network

Abstract

The invention relates to a low-voltage management system of a power distribution network and belongs to the technical field of electricity power distribution. The low-voltage management system of the power distribution network comprises a voltage signal detection module, a voltage comparison module, a control chip, a motor, a tapping switch, and a three-phase self-coupling transformer. The voltage signal detection module is used for voltage sampling, the sampling voltage is transferred to the voltage comparison module for voltage comparison and then processed by the control chip for actuation time setting calculation, the voltage is then used for the motor, the motor obtains electricity and acts, enabling the tapping switch to move and the number of turns of winding at the low-voltage side of the three-phase self-coupling transformer to change, and the function of automatic voltage regulation is achieved. The low-voltage management system of the power distribution network is capable of automatically regulating voltage change, outputting stable voltage, and enabling circuits to be stable. At the nominal voltage hovering around 20%, voltage regulation can be effectively conducted, and it is guaranteed that voltage output at the power supply line end of a rural power grid is within the specified range.

Description

technical field [0001] The invention belongs to the technical field of electric power distribution, and in particular relates to a low-voltage management system of a distribution network. Background technique [0002] In recent years, relevant power departments such as the State Grid have paid more and more attention to the "low voltage" phenomenon. Relevant data show that under normal circumstances, the average line loss rate in my country is about 8.48%, and the line loss power reaches 36.775 billion kW·h. If the average line loss rate drops by about 2%, the loss can be reduced by 8.673 billion kw / year (that is, the annual power generation of the 16 units of the Three Gorges Power Station). Line loss and low voltage are inversely proportional to the square when they have the same radius and cross-sectional area. When the voltage increases by two percentage points, the line loss decreases by four percentage points. Therefore, in the process of controlling the low voltage p...

AI Technical Summary

Problems solved by technology

The current mainstream solution to low voltage mainly adopts two aspects: voltage regulation by voltage regulator and voltage regulation by reactive power compensation. Voltage regulation by voltage regulator and reactive power compensation are suitable for coastal cities with large industrial and mining enterprises, and in some western rural areas. It is far from universal, and the frequent occurrence of low-voltage phenomena has seriously affected the normal life of residents and hindered the development of the rural economy.

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