Active damping control method for active third harmonic injection matrix converter

A matrix converter and damping control technology, applied in the direction of converting AC power input to AC power output, output power conversion devices, electrical components, etc., can solve problems such as reducing efficiency and increasing the high-order harmonic content of input current, and achieve Avoid efficiency, increase high-order harmonic content, and improve damping effect

Active Publication Date: 2018-11-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The present invention proposes an active damping control method for an active third harmonic injection matrix converter, which improves system damping, suppresses filter oscillation, enhances system stability, and solves the problem of passive damping methods reducing efficiency and increasing input current high-order The Problem with Harmonic Content

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  • Active damping control method for active third harmonic injection matrix converter
  • Active damping control method for active third harmonic injection matrix converter
  • Active damping control method for active third harmonic injection matrix converter

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Embodiment Construction

[0055] The technical solutions and beneficial effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0056] Topology Introduction

[0057] The topological structure of the active third harmonic injection matrix converter applied in the present invention is as attached figure 1 As shown, it includes the following parts: three-phase AC power supply 1, input LC filter 2, voltage selector (IVS) 3, third harmonic injection current control bridge arm 4, inverter (VSI) 5, three-phase RL load 6 .

[0058] The three-phase AC power supply 1 is connected to the three-phase input terminal of the voltage selector 3 through the input LC filter 2, and the x and z ends of the voltage selector 3 are connected to the DC terminals p and n of the inverter 5 through the bus filter, The y terminal is connected to the DC terminals p and n of the inverter 5 through the third harmonic injection current control bridge arm 4 , and the three-...

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Abstract

The invention relates to an active damping control method for an active third harmonic injection matrix converter, and belongs to the technical field of the control method for the active third harmonic injection matrix converter. According to the method, adding a virtual damping branch on the input side of the active third harmonic injection matrix converter to obtain the virtual damping current by differentiating the power supply current, and using the relationship between the input side and the third harmonic injection current to correct a third harmonic injection current reference value, thereby improving the damping of the input filter d and suppressing the filter oscillation. According to the active damping control method for the active third harmonic injection matrix converter, the input side filter damping is improved, at the same time, the problem that the passive damping method reduces the efficiency and increases the high harmonic content of the input current is avoided, andthe method is important to improve the stability, efficiency and power supply current quality of the active third harmonic injection matrix converter.

Description

technical field [0001] The invention relates to an active damping control method for an active third harmonic injection matrix converter, and belongs to the technical field of control methods for an active third harmonic injection matrix converter. Background technique [0002] Among the various AC-AC (AC-AC) power converter topologies, the passive front-end converter composed of passive components such as diode rectifier bridges, inductors and capacitors is the earliest and most widely used AC-AC power converter topology. one. The passive front-end converter has the advantages of high conversion efficiency, low EMI (electromagnetic interference), low cost, simple structure, and high reliability. Its main disadvantages are unidirectional energy flow and large input current harmonic distortion. The indirect matrix converter has many advantages such as sinusoidal input and output current, controllable input power factor, four-quadrant operation, and no intermediate energy sto...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/12H02M5/458
CPCH02M1/12H02M5/4585
Inventor 陆程佳周波雷家兴朱奕琦
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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