Reactive compensation type intelligent voltage regulator

Abstract

The invention discloses a reactive compensation type intelligent voltage regulator, comprising a voltage detection unit and three automatic voltage regulation and reactive compensation units; the automatic voltage regulation and reactive compensation units comprise uniphase voltage-regulating transformers serially connected in A, B, or C phase line, a reactive compensation capacitor serially connected with the uniphase voltage-regulating transformers, a switch control circuit which controls a plurality of high voltage switches on a plurality of gear voltage output leads of the uniphase voltage-regulating transformers, and a controller which is connected with the voltage detection unit and controls the switch control circuit; the three uniphase voltage-regulating transformers in the three automatic voltage regulation and reactive compensation units compose a triphase voltage-regulating transformer, the primary side winding of the triphase voltage-regulating transformer is in star connection and Y1 end of the primary side winding is respectively connected to a point after passing through the reactive compensation capacitor. The invention has reasonable designed circuits, simple operation and convenient lead connection, and can enhance the power factor of the circuits during regulation of the voltage of the power supply circuit, thus radically improving power supply quality of thecircuits.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage regulation of distribution networks, in particular to a reactive power compensation type intelligent voltage regulator. Background technique [0002] At present, distribution transformers are commonly distributed in low-voltage rural power grids, and there are many installation points, which are manifested in the following aspects: 1. Dozens or even hundreds of distribution transformers are often installed on a line; 2. Lines Generally, the main line of each line plus branch lines is about ten kilometers to tens of kilometers; 3. The power factor of the line is low, the line loss rate is large, and the load changes greatly with day and night and seasons; 4. The line The structure is simple, the voltage quality of some branch lines is poor, and the degree of power distribution automation is low; 5. There are many power outages. In one line, the average number of accidental power outages a...

AI Technical Summary

Problems solved by technology

However, since the feeder automatic voltage regulator itself consumes a part of reactive power, this further reduces the power factor at the back end of the line. Although the voltage is increased, it may not necessarily improve the power supply capacity at the end of the line.

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