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Direct-current side harmonic suppression system and method of 12-pulse rectification system on basis of interleaved Boost APFC circuit

A pulse wave rectification and harmonic suppression technology, applied in electrical components, output power conversion devices, etc., can solve the problems of difficulty in obtaining synchronization signals and suppressing harmonics, complex active circuit structure, etc., to improve the current tracking effect, Easy to obtain, the effect of reducing the harmonic content of the input current

Inactive Publication Date: 2014-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing 12-pulse rectifier system and method have a complex structure of the active circuit on the DC side, difficulty in obtaining synchronous signals, and poor harmonic suppression effects. The present invention provides a system based on DC side harmonic suppression system and method of 12-pulse rectification system with interleaved parallel Boost APFC circuit

Method used

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  • Direct-current side harmonic suppression system and method of 12-pulse rectification system on basis of interleaved Boost APFC circuit
  • Direct-current side harmonic suppression system and method of 12-pulse rectification system on basis of interleaved Boost APFC circuit
  • Direct-current side harmonic suppression system and method of 12-pulse rectification system on basis of interleaved Boost APFC circuit

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specific Embodiment approach 1

[0026] Specific implementation mode one: see figure 1 Describe this embodiment, the DC-side harmonic suppression system of the 12-pulse rectification system based on the staggered parallel Boost type APFC circuit described in this embodiment, it includes the first three-phase rectifier bridge 8-1, the second three-phase rectifier bridge 8-2 and phase-shifting transformer 9, which also includes balance reactor 1, interleaved parallel Boost type APFC circuit 2, signal processing and control circuit 3, drive circuit 4, No. 1 current sensor 5, No. 2 current sensor 6 and voltage sensor 7;

[0027] The three-phase input end of described phase-shifting transformer 9 is connected with grid, and the first three-phase output end of described phase-shifting transformer 9 is connected with the three-phase input end of first three-phase rectifier bridge 8-1, and described The second three-phase output end of the phase-shifting transformer 9 is connected with the three-phase input end of t...

specific Embodiment approach 2

[0036] Specific implementation mode two: see figure 1 and 2 Describe this embodiment, the difference between this embodiment and the DC side harmonic suppression system of the 12-pulse rectification system based on the interleaved parallel Boost APFC circuit described in the first specific embodiment is that the interleaved parallel Boost APFC circuit 2 Including single-phase rectifier bridge 2-1, first inductor L 1 , the second inductance L 2 , the first diode D 1 , the second diode D 2 , the third diode D 21 , the fourth diode D 22 , the first capacitance C 21 , the second capacitance C 22 , the third capacitor C 23 , the first resistor R 21 , the second resistance R 22 , the first switch tube S 21 and the second switch tube S 22 ,

[0037] The AC signal input terminal of the single-phase rectifier bridge 2-1 is connected in parallel with the secondary winding of the balance reactor 1, and the positive pole output terminal of the DC side of the single-phase rect...

specific Embodiment approach 3

[0048] Specific implementation mode three: see figure 1 Describe this embodiment. The difference between this embodiment and the DC-side harmonic suppression system of the 12-pulse rectification system based on the interleaved parallel Boost APFC circuit described in the first embodiment is that the first switching tube S 21 is MOSFET or IGBT, the second switch tube S 22 for MOSFET or IGBT.

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Abstract

The invention provides a direct-current side harmonic suppression system and method of a 12-pulse rectification system on the basis of an interleaved Boost APFC circuit, and belongs to the technical field of power electronics. The system and method aim to solve the problems that an existing direct-current side harmonic suppression system and method of the 12-pulse rectification system are complex in structure of a direct-current side active circuit, difficult in obtaining synchronizing signals and poor in harmonic suppression effect. The interleaved Boost APFC circuit is adopted to serve as the direct-side active circuit of the system, a voltage signal of a balance reactor secondary winding is sampled to serve as a standard triangular wave signal, the standard triangular wave signal and a load circuit current signal are multiplied to serve as a current reference signal, and interphase balance reactor secondary winding currents are controlled through signal processing and a control circuit to track secondary winding voltage, so that the balance reactor secondary winding currents and the secondary winding voltage are identical in frequency and phase, and the amplitude of the balance reactor secondary winding currents is half that of a load circuit current value. The system and method are applied to the field of harmonic suppression of the 12-pulse rectification system.

Description

technical field [0001] The invention belongs to the technical field of power electronics. Background technique [0002] The 12-pulse rectifier circuit has been widely used in industrial systems such as motor speed regulation, electrochemical processing and renewable energy conversion, but its nonlinear and time-varying characteristics have brought a large number of harmonics to the power grid, and it has become the main power grid. One of the sources of harmonic pollution has brought serious harm to the power grid. [0003] The harmonic suppression technology on the DC side of the 12-pulse rectifier circuit modulates the current on the DC side to suppress the input current harmonics. At present, it can be divided into passive harmonic suppression technology on the DC side and active harmonic suppression technology on the DC side. Among them, the active harmonic suppression method on the DC side is based on the switch conversion technology, and the DC / DC conversion is perfor...

Claims

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Application Information

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IPC IPC(8): H02M1/12
Inventor 杨威杨世彦苍胜李渊王景芳
Owner HARBIN INST OF TECH
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