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18-switch type AC-AC matrix converter and modulation method thereof

A technology of matrix converter and modulation method, which is applied in the direction of converting AC power input to AC power output, conversion equipment that can be converted to DC without intermediate conversion, and output power conversion device, which can solve the problem of input three-phase voltage output The three-phase voltage conversion form is not easy to realize, the modulation strategy is difficult to realize, and the commutation strategy is complicated, etc., to achieve the effect of facilitating two-way flow of energy, reducing control difficulty, and stabilizing the structure

Active Publication Date: 2021-01-05
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the AC-AC matrix converter has a large number of switches, and the bidirectional switch tubes are connected back-to-back, so most of the modulation strategies are difficult to implement and the commutation strategies are complicated, which makes it difficult to realize the conversion form of input three-phase voltage and output three-phase voltage

Method used

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  • 18-switch type AC-AC matrix converter and modulation method thereof
  • 18-switch type AC-AC matrix converter and modulation method thereof
  • 18-switch type AC-AC matrix converter and modulation method thereof

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Embodiment Construction

[0028] Below in conjunction with embodiment the present invention is described in further detail:

[0029] Such as Figure 1 to Figure 8 As shown, an 18-switch AC-AC matrix converter, the topology is composed of input three-phase power supply, input filter, bidirectional switch group for energy conversion, and three-phase star load connected in sequence.

[0030] Among them, the input power supply is the three-phase grid voltage u a , u b , u c ; The input filter adopts a three-phase LC structure; the bidirectional switch group is composed of 9 pairs of bidirectional switch tubes; the load adopts a star-shaped three-phase load connection form.

[0031] Three-phase grid voltage u a , u b , u c A star connection is used.

[0032] The three-phase LC filter consists of the first filter inductor L a , the second filter inductance L b , the third filter inductance L c , the first filter capacitor C a , the second filter capacitor C b , the third filter capacitor C c Com...

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Abstract

The invention discloses an 18-switch type AC-AC matrix converter and a modulation method thereof, belongs to the technical field of modulation control of power electronic power converters. The topology of the 18-switch type AC-AC matrix converter is usually called as a three-phase three-phase matrix converter. Based on the converter topology, the invention provides a current type SVM combinationallogic modulation method. Positive and negative polarity selection signals virtually decompose a bidirectional controllable switching tube of the matrix converter into a unidirectional controllable switching tube, and a current type 12-sector SVM serves as a switching tube basic modulation method. 6 paths of SVM signals and 3 pairs of complementary voltage polarity selection signals are subjectedto combinational logic processing, so that 18 paths of switching tube driving signals can be obtained. According to the 18-switch type AC-AC matrix converter and modulation method thereof of the invention, the control is simpler and more flexible, the control difficulty of the matrix converter is reduced, the switching frequency of the switching tube is reduced, the adaptability of the matrix converter to a load is improved, and the bidirectional flow of energy is facilitated.

Description

technical field [0001] The invention relates to the technical field of modulation control of power electronic power converters, in particular to an 18-switch AC-AC matrix converter and a modulation method thereof. Background technique [0002] A converter is a topological device that converts alternating current energy of a certain amplitude and frequency into electrical energy of different amplitude and frequency. The matrix converter is called a "universal converter", which can theoretically directly realize the same or different numbers of input and output phases. Among them, matrix converters that input three-phase voltage and output three-phase voltage are more commonly used. The topology used in an 18-switch AC-AC matrix converter is also called a three-phase-three-phase matrix converter, which can directly realize a certain The function of three-phase input of amplitude frequency to another three-phase output of amplitude frequency can theoretically output a waveform...

Claims

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Application Information

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IPC IPC(8): H02M5/22H02M5/293
CPCH02M5/22H02M5/293H02M5/2932
Inventor 闫朝阳姜汉朝奚子伟段浩天赵丁选张祝新刘爽
Owner YANSHAN UNIV