Partition Compensation Three-phase AC Voltage Stabilizer
A voltage stabilizing device and three-phase AC technology, which is applied in the direction of instruments, control/regulation systems, and adjustment of electrical variables, etc., to achieve the effect of strengthening protection and reducing the impact frequency of shift voltage
Active Publication Date: 2020-12-01
HUNAN UNIV OF TECH
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Problems solved by technology
[0004] In order to solve the problems existing in the existing compensated AC voltage stabilizer, the present invention provides a partition compensation three-phase AC voltage stabilizer, including a compensated three-phase main circuit unit, a compensation control unit, a trigger unit, and a protection drive unit
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[0041] The present invention will be further described below in conjunction with accompanying drawing.
[0042] figure 1 It is a block diagram of the system composition of the three-phase AC voltage stabilizing device for partition compensation. The compensation control unit outputs the three-phase trigger control signal P5 to the trigger unit. The three-phase trigger control signal P5 is composed of A phase, B phase, and C phase trigger control signals P5A, P5B, Composed of P5C; the trigger unit sends a trigger signal P6 to the compensation type three-phase main circuit unit according to the input three-phase trigger control signal to control the on-off of the bidirectional thyristor in the three-phase thyristor bridge. The compensation control unit simultaneously outputs the three-phase non-trigger zone control signal P4 and the three-phase trigger gating control value discrimination signal P7 to the protection drive unit, and the three-phase non-trigger zone control signal ...
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The invention relates to a zonal compensation three-phase alternating current voltage stabilizer, which comprises a compensation type three-phase main circuit unit, a compensation control unit, a trigger unit and a protection driving unit; the compensation control unit consists of three compensation control circuits which comprise an analog-to-digital conversion coding circuit, a decoding gating circuit, a delay protection circuit, a trigger gating configuration circuit and an error detecting and judging circuit respectively, the compensation control unit samples three phases of voltages and outputs corresponding a three-phase trigger control signal, a three-phase non-trigger area control signal and a three-phase trigger gating control value judgment signal; and the protection driving unitcontrols whether a three-phase thyristor bridge is subjected to open circuit protection or not according to the input three-phase trigger gating control value judgment signal. The voltage stabilizercan adjust the number of subareas of the alternating current voltage in the input fluctuation range and change the compensation mode and the compensation precision; while interlocking control is achieved, whether a logic error occurs in the control circuit or not is also used for carrying out open circuit protection on the thyristor bridge, so that the protection force aiming at the abnormal working process is effectively strengthened.
Description
technical field [0001] The invention relates to the technical field of power supplies, in particular to a three-phase AC voltage stabilizing device with partition 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 voltage stabilizer is th...
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IPC IPC(8): G05F1/30
CPCG05F1/30
Inventor 文定都凌云刘建华
Owner HUNAN UNIV OF TECH