Three-phase AC voltage stabilization control method with zonal auto-compensation

Abstract

A three-phase AC voltage stabilization control method with zonal auto-compensation is realized by a three-phase AC voltage stabilizer including an auto-compensation type three-phase main circuit unit,a compensation control unit, a trigger unit and a protection driving unit. A compensation control unit is composed of three compensation control circuits including a sampling comparison circuit, a delay protection circuit, a trigger gating control circuit and an error detection and discrimination circuit; a voltage sampling of a phase voltage of a three-phase AC power supply are sampled; a corresponding three-phase trigger control signal, a three-phase non-trigger area control signal and a three-phase trigger gating control value discrimination signal are output; The protection driving unit protects the three-phase thyristor switch group according to the input three-phase trigger gating control value to judge whether the signal is valid or not. The voltage stabilization control method notonly realizes the interlocking control, but also protects the thyristor switch group whether the logic error occurs in the control circuit, thereby effectively strengthening the protection strength against the abnormality occurring in the three-phase voltage stabilization working process.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a three-phase AC voltage stabilization control method with partition auto-coupling compensation. 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 ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the existing compensating AC voltage stabilizer, the present invention provides a three-phase AC voltage stabilizing control method with partition auto-coupling compensation, including:

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