72-pulse self-coupling phase-shift rectification system
A rectification system and phase-shifting technology, applied in the field of circuits, can solve the problems of high cost, complicated winding connection, large volume, etc., and achieve the effects of improving product efficiency, reducing total harmonic content, and reducing volume
Active Publication Date: 2020-08-18
GUANGDONG LANGTENG ELECTRICAL CO LTD
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Problems solved by technology
[0006] The invention provides a 72-pulse auto-coupling phase-shifting rectification system, which fully utilizes the advantages of the autotransformer and adopts reasonable winding layout and connection to achieve the purpose of multi-pulse rectification and phase-shifting, and solves the problem of the volume of the existing phase-shifting rectification system Large size, high cost, complex winding connection and other issues
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[0027] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0028] by figure 1 For example, 100 is a three-phase power supply, 200 is an input reactor, 300 is a 72-pulse auto-coupling phase-shifting transformer, 400 is a rectifier rectifier, 500 is a balance reactor, 600 is a DC smoothing inductor, and 700 is a filter capacitor. After the ABC three-phase power supply 100 enters the 72-pulse self-coupling phase-shifting transformer 300, it outputs 12 voltages of a1b1c1~a12b12c12 with equal amplitudes and different phases, which are phase-shifted by +27.5°, +22.5°, +17.5°, +12.5° respectively , +7.5°, +2.5°, -2.5°, -7.5°, -12.5°, -17.5°, -22.5°, -27.5°. The 12 groups of AC voltages are respectively rectified by D1-D12 of the rectifier 400 to output 12 groups of DC voltages. In order to realize the function of equalizing voltage and current during the conversion of 12 sets of A...
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The invention discloses a 72 pulse wave self-coupled phase shift rectification system comprising a three-phase input electric reactor, a 72 pulse wave phase shift self-coupled voltage transformer, 12 rectifiers, a balancing reactor, a direct current inductor, a filter capacitor and an output interface, wherein the balancing reactor comprises 12 windings, each winding is provided with a centre tap, the input electric reactors are respectively connected with three input ends of the 72 pulse wave phase shift self-coupled voltage transformer which is provided with 12 three-phase alternating current output ends, each of the rectifiers is connected with one of the three-phase alternating current output end, and the 12 rectifier are orderly and evenly divided into six groups. The 72 pulse wave self-coupled phase shift rectification system has voltage sharing and current sharing effects, that output voltage 72 pulse waves are combined can be ensured, and total harmonic wave content of input currents can be lowered; the 72 pulse wave self-coupled phase shift rectification system is characterized by great production size reduction, great production weight reduction, great production cost decrease, production efficiency improvement, winding quantity decrease and declining connecting technology complexity.
Description
technical field [0001] The invention relates to the field of circuits, in particular to a 72-pulse self-coupling phase-shifting rectification system. Background technique [0002] At present, with the rapid development of power electronics technology, more and more rectifiers are applied to various fields. Due to its nonlinear characteristics, the grid-side input current has serious distortion, which reduces the electromagnetic compatibility performance of the equipment and brings harm to the grid and other electrical equipment. Therefore, how to suppress current harmonics is an important task. [0003] Harmonic suppression is a major topic involving power electronics technology, power system, electrical automation technology, theoretical electrician and other fields. Due to the increasingly widespread application of power electronic devices, harmonic and reactive power problems have attracted more and more attention. At the same time, due to the rapid progress of power e...
Claims
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IPC IPC(8): H02M7/08H02M7/10H01F27/28H01F27/30
CPCH01F27/2828H01F27/306H02M7/068H02M7/08H02M7/10
Inventor 陈良汉
Owner GUANGDONG LANGTENG ELECTRICAL CO LTD