Automatic-coupling compensating three-phase alternate-current voltage stabilizer

Abstract

The invention discloses an automatic-coupling compensating three-phase alternate-current voltage stabilizer. The automatic-coupling compensating three-phase alternate-current voltage stabilizer comprises automatic-coupling compensating type three-phase main circuits, a compensating control unit, a triggering unit and an error detection control unit. Each phase main circuit comprises a compensatingtransformer, an automatic-coupling transformer, a thyristor switch set and a relay protection switch, and the same compensating mode is adopted for realizing compensation. The compensating control unit outputs a three-phase triggering control signal to the triggering unit and the error detection control unit; the triggering unit emits a triggering signal according to the input triggering controlsignal to control on-off of thyristors in the thyristor switch sets in the three phase main circuits; the error detection control unit starts/stops protection for the thyristor switch sets in the three phase main circuits according to the judgment about whether or not the input triggering control signal is wrong. The voltage stabilizer realizes interlocking control, meanwhile conducts open circuitprotection on the thyristor switch sets according to the judgment about whether or not logical errors occur on a control circuit, effectively enhances the protection effort for abnormal conditions during work, and works more stably and reliably.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to an auto-compensation three-phase AC voltage stabilizer. Background technique [0002] The existing compensating single-phase and three-phase AC voltage stabilizers have the advantages of wide range of voltage regulation, almost no distortion of the waveform, high overall efficiency and strong load adaptability. The principle is to automatically control the switching of different winding coils of the primary winding on the compensation transformer according to the level of the input voltage, using the ratio relationship between the primary side working winding and the secondary winding, or by adjusting the voltage applied to the primary winding , providing bidirectional and multi-level voltage compensation, so as to achieve the purpose of voltage regulation and stabilization. [0003] The disadvantage of the existing compensated AC voltage stabilizer is that when the motor...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the existing compensated AC voltage stabilizer, the present invention provides an auto-compensated three-phase AC voltage stabilizer, which includes an auto-compensated three-phase main circuit, a compensation control unit, a trigger unit, an error detection control unit

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