A third harmonic current tracking method in h3imc

A harmonic current and current tracking technology, which is applied in the direction of electrical components and output power conversion devices, can solve the problems that PI closed-loop control cannot be effectively applied, achieve improved reactive power control, simple and effective control methods, and realize input current The effect of the wave

Active Publication Date: 2020-03-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a third harmonic current tracking method in H3IMC, which aims at the problem that the traditional PI closed-loop control cannot be effectively applied to the H3IMC circuit, and makes up for the vacancy of the bridge arm injection circuit control method in the H3IMC circuit , to achieve the third harmonic current tracking reference value

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  • A third harmonic current tracking method in h3imc
  • A third harmonic current tracking method in h3imc
  • A third harmonic current tracking method in h3imc

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Embodiment Construction

[0033]Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0034] The control block diagram of the third harmonic current tracking method in a kind of H3IMC of the present invention is as follows image 3 As shown, this method collects the third harmonic current through the feedback circuit, realizes the closed-loop harmonic current in the control circuit, and calculates the duty ratio of the harmonic injection bridge arm switching tube by calculating the current increment, so as to realize the third harmonic current Track reference values.

[0035] The current source is used to represent the inverter stage and output load of the latter stage, according to the principle of uncontrolled rectification and image 3 As indicated, t...

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Abstract

The invention discloses a third harmonic current tracking method in H3IMC. The method collects the actual value of the harmonic current injected into the input side and performs PI closed-loop control on it, so that the reference value set by the harmonic current tracking is lower than the traditional The control method improves the current tracking performance without adding hardware devices; this method designs the output value of the PI controller for the H3IMC topology as the harmonic current, and then makes a difference with the current cycle harmonic current feedback value to obtain the current increment, and then By calculating the duty cycle of the switching tube in the harmonic injection bridge arm, the harmonic current tracking can be accurately realized and better input current performance can be obtained. However, when the traditional control method is applied to the H3IMC topology, the current runaway problem will occur. The method of the invention realizes the tracking of the reference value by the harmonic current, can effectively improve the performance of the input current, and ensures the safe and stable operation of the system.

Description

technical field [0001] The invention relates to a current control method, in particular to a third harmonic current tracking method in H3IMC, and belongs to the technical field of matrix converter control. Background technique [0002] In a high-power power system, the three-phase alternating current output by the power supply usually undergoes two-stage conversion (AC-DC-AC or AC-DC-DC) to obtain the required voltage and then provides power to the load end. The two-stage matrix converter (TSMC ) is a new type of "green" active front-end AC-DC-AC converter, and because it has many advantages such as energy storage elements without a DC link, energy can flow in both directions, sinusoidal input and output performance, and power factor controllable , has increasingly attracted the attention of scholars at home and abroad. [0003] Although the research on TSMC has become more and more in-depth in recent years, there are still some insurmountable problems: (1) Since there is n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/12
CPCH02M1/12H02M1/0012
Inventor 朱奕琦周波陆程佳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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