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Two-way switch tube-based current source type two-way multi-pulse converter

A technology of bidirectional converter and current source type, which is applied in the field of current source type bidirectional multi-pulse converter and power electronic conversion, and can solve the problems that energy cannot be transmitted bidirectionally, and achieve volume reduction, volume reduction, and system reliability sex high effect

Inactive Publication Date: 2013-05-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to reduce the volume and weight of its magnetic components on the basis of the advantages of simple control and filtering of the traditional current source type multi-pulse inverter, to overcome the shortcoming that its energy cannot be transmitted bidirectionally, and to propose a bidirectional switch tube-based current Source Bidirectional Multi-Pulse Converter

Method used

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  • Two-way switch tube-based current source type two-way multi-pulse converter
  • Two-way switch tube-based current source type two-way multi-pulse converter
  • Two-way switch tube-based current source type two-way multi-pulse converter

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Embodiment 1

[0035] attached figure 1 A schematic structural diagram of the current source type bidirectional multi-pulse converter based on the bidirectional switching tube of the present invention is given.

[0036] The invention comprises a DC side circuit (1), a reversible three-phase bridge group (3), a multi-pulse transformer (4), a three-phase AC power supply (5) and a control circuit (8). When the system is a 12- or 24-pulse bidirectional converter, it is best to connect a balance reactor (2) between the DC side circuit (1) and the reversible three-phase bridge group (3) to realize the current of each three-phase bridge current sharing.

[0037] Multi-pulse transformers can use various types of transformers with corresponding pulse numbers in the corresponding structures of 6, 12, 18, and 24-pulse bidirectional converters.

[0038] The reversible three-phase bridge group can be composed of a basic switching unit composed of a bidirectional thyristor, a parallel connection of two r...

Embodiment 2

[0045] Such as image 3 As shown, the structure of the isolated 6-pulse bidirectional converter in the present invention. The balance reactor (2) is not connected between the DC side circuit (1) and the reversible three-phase bridge group (3). The midpoint is sequentially connected with the corresponding interface of the multi-pulse transformer.

Embodiment 3

[0047] The structure of the self-coupling type 12-pulse bidirectional converter of the present invention is as follows Figure 4 shown. 10

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Abstract

The invention provides a two-way switch tube-based current source type two-way multi-pulse converter which comprises a direct current side circuit (1) and a three-phase alternating current power supply (5), and also comprises a reversible three-phase bridge group (3), a multi-pulse transformer (4) and a control circuit (8), wherein the direct current side circuit (1), the reversible three-phase bridge group (3), the multi-pulse transformer (4) and the three-phase alternating current power supply (5) are sequentially connected, the single input end of the control circuit (8) is connected between the multi-pulse transformer (4) and the three-phase alternating current power supply (5), and the control end of the control circuit (8) is connected with the reversible three-phase bridge group (3). A circuit topology provided by the invention is capable of realizing energy two-way flowing of a current source type multi-pulse converter and directly controlling the current of a three-phase alternating current side, is simple in design because the controller and a filter are respectively independent, has high reliability, and is suitable for various fields needing that the multi-pulse converter realizes two-way energy transmission.

Description

technical field [0001] The invention relates to a current source type bidirectional multi-pulse converter based on a bidirectional switch tube, which belongs to the category of power electronic conversion. Background technique [0002] The multi-pulse inverter technology uses a phase-shifting transformer to superimpose the output of the multi-phase inverter to eliminate low-order harmonics and make the synthesized waveform approach to a sine wave. It has the advantages of less harmonic content, low switching frequency, high reliability, high efficiency, It has the advantages of strong overload capacity and no additional electromagnetic interference. At the same time, the phase-shifting transformer in the system can also electrically isolate the input and output, which has little pollution to the power grid. Based on the above characteristics, multi-pulse inverter technology is widely used in high-power AC drives, new energy applications and power quality control. [0003] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/72
Inventor 陈乾宏杨鸣强
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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