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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, conversion of AC power input to DC power output, and output power conversion device, which can solve the problem of out-of-control injection current and input-side oscillation instability , affecting the safe operation of the system, etc.

Active Publication Date: 2021-09-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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
  • Injection current control device of hybrid active third harmonic injection matrix converter
  • 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 and 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 termina...

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Abstract

The invention discloses an injection current control device of a hybrid active third harmonic injection matrix converter, which relates to the field of hybrid active third harmonic injection matrix converters. In the injection current control device, a reactive component control bridge arm is bridged between an x end and a z end of a voltage selector and is connected with a y bridge arm end of the voltage selector through a path selection circuit;When H3IMC runs at a non-unity power factor, the reactive component control bridge arm is controlled according to the absolute value of the reactive component of the injection current, and the path selection circuit is controlled to form a corresponding reactive component circulation path according to the positive and negative conditions of the reactive component; the injection current control device can solve the problem that the injection current is out of control when the H3IMC runs in a forward non-unity power factor, the reactive power control capability of the input side is enhanced, the actual controllable range of the power factor of the input side is widened, and full-input power factor control during forward running is realized.

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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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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