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

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 ...

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.

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