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Direct-current side harmonic suppression system and method for multi-pulse wave thyristor controllable rectification system

A rectification system and harmonic suppression technology, applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc. Effect

Inactive Publication Date: 2014-02-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of harmonic generation on the AC network side due to the nonlinear characteristics of the existing multi-pulse thyristor rectifier system. The present invention provides a DC-side harmonic suppression system for a multi-pulse thyristor controllable rectification system. and methods

Method used

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  • Direct-current side harmonic suppression system and method for multi-pulse wave thyristor controllable rectification system
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  • Direct-current side harmonic suppression system and method for multi-pulse wave thyristor controllable rectification system

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specific Embodiment approach 1

[0040] Specific implementation mode 1: see figure 1 This embodiment is described. The DC side harmonic suppression system of the multi-pulse thyristor controllable rectifier system described in this embodiment includes a first controllable rectifier bridge 8-1, a second controllable rectifier bridge 8-2 and a shifter Phase transformer 9, which also includes balanced reactor 1 with secondary side, six times frequency current triangular wave inverter circuit 2, signal processing and control circuit 4, drive circuit 3, secondary side current sensor 5, load loop current sensor 7 and synchronization and phase control circuit 6;

[0041] The three-phase input terminal of the phase-shifting transformer 9 is connected to the power grid, the first three-phase output terminal of the phase-shifting transformer 9 is connected to the three-phase input terminal of the first controllable rectifier bridge 8-1, and the The second three-phase output terminal of the phase-shifting transformer 9...

specific Embodiment approach 2

[0048] Specific implementation two: see figure 1 and 2 Describing this embodiment, the difference between this embodiment and the DC side harmonic suppression system of the multi-pulse thyristor controllable rectifier system described in the specific embodiment 1 is that the said sixfold frequency current triangular wave inverter circuit 2 is a half bridge structured circuit.

specific Embodiment approach 3

[0049] Specific implementation mode three: see figure 2 Describing this embodiment, the difference between this embodiment and the DC side harmonic suppression system of the multi-pulse thyristor controllable rectification system described in the second embodiment is that the sixfold frequency current triangular wave inverter circuit 2 includes a first inductor L 1N , the first switch tube S 11 , the first diode D 11 , the first capacitor C 11 , the first resistance R 11 , the first three switches S 13 , the first three diodes D 13 , the first three capacitors C 13 , the first three resistors R 13 , the first and second capacitors C 12 , the first and second resistors R 12 , the first four capacitors C 14 and the first four resistors R 14 ,

[0050] The first inductance L 1N One end of L is connected to one end of the secondary winding of the balanced reactor 1 with the secondary side as the first current input end of the six-fold frequency current triangular wav...

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Abstract

The invention discloses a direct-current side harmonic suppression system and a method for a multi-pulse wave thyristor controllable rectification system, and belongs to the technical field of power electronics. The system and the method solve the problem that the nonlinear characteristic of the existing multi-pulse wave thyristor controllable rectification system induces the direct-current side to generate harmonic wave. A signal processing and controlling circuit processes the received standard triangular wave signal, load loop current signal and vice-side winding current signal, and transmits two generated PWM (Pulse Width Modulation) driving signals to a driving circuit; the driving circuit carries out power amplification to the two received PWM driving signals, outputs the amplified signals to a sixfold frequency multiplication current triangular wave inverter circuit, adjusts the vice-side winding current value of an interphase reactor with vice-side, and enables the vice-side winding current peak value to be 0.5 times as great as the load loop current value through current closed-loop control; in each period, the first zero crossing point which is led to negative value and belongs to the vice-side winding current to be lagged after a voltage starting point alpha of the alternating current input phase A. The direct-current side harmonic suppression system and the method for a multi-pulse wave thyristor controllable rectification system can be applied to the field of high power work.

Description

technical field [0001] The invention belongs to the technical field of power electronics. Background technique [0002] In high-power applications such as motor speed regulation, high-voltage DC transmission, electrochemical processing, aerospace and renewable energy conversion systems, low-harmonic and high-power adjustable and regulated DC power supplies are often required, and ordinary diodes do not control much. When the power grid fluctuates and the load changes, the output voltage of the pulse rectifier system will fluctuate and cannot be regulated, let alone the output voltage adjustable function, which makes the use of ordinary uncontrolled multi-pulse rectifier systems severely limited. The wave thyristor controllable rectifier system can not only reduce the THD value, but also overcome the shortcomings of the above ordinary uncontrolled multi-pulse rectifier system, and the multi-pulse thyristor controllable rectifier system circuit has the advantages of simple imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/162H02M1/14
Inventor 杨世彦李渊杨威王景芳孟凡刚
Owner HARBIN INST OF TECH
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