Three-phase AC voltage regulator for rail transit

A three-phase AC, rail transit technology, applied in the conversion equipment of AC power input to AC power output, conversion equipment and output power conversion devices without intermediate conversion, to reduce damage, reduce costs, Stable work effect

Active Publication Date: 2021-04-23
HUNAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Three-phase AC voltage regulator for rail transit
  • Three-phase AC voltage regulator for rail transit
  • Three-phase AC voltage regulator for rail transit

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with accompanying drawing.

[0041] figure 1 It is a system block diagram of a three-phase AC voltage stabilizer for rail transit. The compensation control unit outputs a 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 three-phase trigger signal P6 to the self-coupling compensation type three-phase main circuit unit according to the input three-phase trigger control signal, and controls the on-off of the bidirectional thyristor in the three-phase main circuit thyristor switch group of A, B, and C . 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. The three-phase non-trigger ...

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PUM

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Abstract

A rail transit three-phase AC voltage stabilizer, comprising an auto-compensation three-phase main circuit unit, a compensation control unit, a trigger unit, and a protection drive unit; the compensation control unit consists of three sampling and comparison circuits, a delay protection circuit, and a trigger The gating control circuit and the compensation control circuit of the error detection and discrimination circuit are composed of three-phase AC power supply phase voltage voltage samples respectively, and output corresponding three-phase trigger control signals, three-phase non-trigger zone control signals, and three-phase trigger gating The control value discrimination signal; the protection drive unit cuts off the power supply voltage of the input side of the three-phase autotransformer according to whether the input three-phase trigger gating control value discrimination signal is valid, so as to realize the protection of the three-phase thyristor switch group. While implementing interlock control, the voltage stabilizer also protects the thyristor switch group whether there is a logic error in the control circuit, which effectively strengthens the protection against the abnormal working process of the voltage stabilizer, making the work more stable and reliable .

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a rail transit 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 AC power supply for rail transit occasions or equipment such as subway control centers and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/10H02M5/257
CPCH02M5/10H02M5/257
Inventor 凌云张海军谭华容刘飞宋建波陈刚
Owner HUNAN UNIV OF TECH
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