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Injection Current Control Device of Hybrid Active Third Harmonic Injection Matrix Converter

A matrix converter and current injection technology, which is applied in the direction of conversion of AC power input to AC power output, AC power input into DC power output, output power conversion device, etc. In order to achieve the effect of enhancing reactive power control capability and broadening the actual controllable range

Active Publication Date: 2022-02-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual injection current is the inductor current, which cannot change abruptly, and the injection current is out of control. figure 2 shown
The uncontrolled injection current will cause the distortion of the power supply current. When the damping of the input filter is insufficient, it will even cause the input side to oscillate and become unstable, affecting the safe operation of the system.

Method used

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  • Injection Current Control Device of Hybrid Active Third Harmonic Injection Matrix Converter
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  • Injection Current Control Device of Hybrid Active Third Harmonic Injection Matrix Converter

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Embodiment Construction

[0029] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] This application discloses a hybrid active third harmonic injection matrix converter injection current control device, please refer to image 3 with 4 , the hybrid active third harmonic injection matrix converter includes a three-phase AC power supply, a voltage selector (IVS), a current-source inverter (CSI) and a three-phase AC load, and the three-phase AC power supply U sa , U sb , U sc Connected to the three-phase input terminal of the voltage selector, the three-phase AC power supply and the voltage selector usually also include an input filter composed of an inductor and a capacitor. The voltage selector mainly includes a rectification stage and three bidirectional switches. The rectification stage includes three bridge arms composed of fully controlled devices, and the two ends respectively lead to the maximum phase x termin...

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Abstract

The invention discloses an injection current control device of a hybrid active third harmonic injection matrix converter, and relates to the field of a hybrid active third harmonic injection matrix converter. In the injection current control device, a reactive component control bridge arm is connected across Between the x terminal and the z terminal of the voltage selector and connected to the y bridge arm terminal of the voltage selector through a path selection circuit, when the H3IMC operates with a non-unity power factor, it controls the reactive power according to the absolute value of the reactive component of the injected current The component controls the bridge arm, and controls the path selection circuit to form the corresponding flow path of the reactive component according to the positive and negative conditions of the reactive component; the injection current control device can solve the injection current out of control when the H3IMC is running in the forward non-unity power factor The problem is to enhance the reactive power control capability of its input side, broaden the actual controllable range of its input side power factor, and realize full input power factor control during forward operation.

Description

technical field [0001] The invention relates to the field of hybrid active third harmonic injection matrix converters, in particular to an injection current control device for hybrid active third harmonic injection matrix converters. Background technique [0002] Matrix converter (MC) is an AC-AC power converter that does not require large-capacity energy storage components. It has the advantages of small size, light weight, high reliability, bidirectional flow of energy, and sinusoidal input and output. It is widely used in the world been widely studied. Two-stage matrix converter is a subclass of matrix converter, which has the advantages of simple clamping circuit and easy implementation of commutation control strategy, but has the limitations of small input power factor angle control range and weak reactive power control capability. [0003] In this context, the hybrid active third harmonic injection matrix converter (H3IMC) was proposed by researchers, please refer to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458H02M7/5387H02M1/42
CPCH02M5/4585H02M7/53875H02M1/4216Y02B70/10
Inventor 陆程佳周波常青云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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