Compensation type AC voltage-stabilizing control method

Abstract

The invention discloses a compensation type AC voltage-stabilizing control method. The method comprises the following steps: performing voltage compensation on a plurality of voltage level sections ofan AC power supply phase voltage by different combinations of a plurality of compensation transformers, wherein the different combinations of each phase of compensation transformer are controlled bythyristor bridges of the same phase; when a combined state of the plurality of compensation transformers is changed in a phase, maintaining an untriggered region time between the two successive combined states, and turning off all thyristors in the thyristor bridge of the phase; judging whether each phase of trigger control signal is a valid trigger control signal for the phase; and when a three-phase trigger control signal is wrong, controlling the three-phase thyristor bridge to be in an open circuit protection state. The voltage-stabilizing control method also performs an open circuit protection on the thyristor bridges aiming at whether a logic error occurs in the control circuit while an interlocking control is realized, so that the protection strength of abnormities during working iseffectively enhanced, thereby enabling the working process of AC voltage-stabilizing to be more stable and reliable.

Description

Technical field [0001] The invention relates to the technical field of power supplies, in particular to a compensation type AC voltage stabilization control method. Background technique [0002] The existing compensated single-phase and three-phase AC voltage stabilizers have the advantages of wide voltage stabilization range, almost no waveform distortion, 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 of the primary side working winding and the secondary winding, or by adjusting the voltage applied to the primary winding , Provide two-way multi-gear voltage compensation, so as to achieve the purpose of voltage regulation and stabilization. [0003] The disadvantage of the existing compensating AC voltage stabilizer is that when a motor is used to control the movement of the c...

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Problems solved by technology

[0004] In order to solve the problems existing in the existing compensating AC voltage stabilizer, the present invention provides a compensating AC voltage stabilizing control method, which includes: dividing the voltage within the phase voltage fluctuation range of each phase of the AC power supply of the three-phase AC power supply into M voltage level ranges are used for compensation control; in each phase, 0, or 1, or multiple compensation tran

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