A control method for a single-phase single-stage boost inverter

A control method and single-stage technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve problems such as waveform distortion, achieve low voltage stress, avoid output waveform distortion, Practical effect

Active Publication Date: 2021-11-12
NANTONG UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0003] In view of this, the present invention proposes a control method for a single-phase single-stage boost inverter, which effectively solves the problem of waveform distortion of the single-phase single-stage boost inverter under light load under the traditional modulation method , has a stronger practicality

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  • A control method for a single-phase single-stage boost inverter
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  • A control method for a single-phase single-stage boost inverter

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] figure 1 The single-phase single-stage boost inverter shown includes: input voltage source u in , input capacitance C in , input inductance L in , the first anti-reverse diode D 1 , the second anti-reverse diode D 2 , the first switch tube S 1 , the second switch tube S 2 , the third switch tube S 3 , the fourth switch tube S 4 , output filter capacitor C f , Output filter inductance L f and resistive load R; input voltage sour...

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Abstract

The invention relates to a control method of a single-phase single-stage boost inverter, comprising: obtaining the DC bus voltage, adjusting the frequency of a unipolar triangular carrier signal through a DC bus voltage PI controller to realize the regulation of the DC bus voltage; obtaining the output Voltage, the output waveform and amplitude control are realized through the output voltage PI controller. Compared with the existing method, the method provided by the present invention effectively avoids the large-scale adjustment of the boost duty of the single-phase single-stage boost inverter under the traditional PWM+SPWM modulation mode by changing the control degree of freedom of the system. The output waveform distortion problem caused by the empty ratio is more practical.

Description

technical field [0001] The invention belongs to the technical field of inverters, and in particular relates to a control method for a single-phase single-stage boost inverter. Background technique [0002] Since the output voltage of DC power sources such as photovoltaic cells, fuel cells, and storage batteries is low and has a wide range of variation, renewable energy distributed power generation systems generally use a two-stage boost converter cascaded voltage source inverter (VSI) structure. The control of this solution is relatively simple, but the number of power devices is large, the system cost is high, and the efficiency is difficult to further improve. In recent years, some scholars have proposed that the input inductance L in Through two diodes, they are respectively connected to the midpoint of each bridge arm of the single-phase VSI, thereby realizing a single-stage boost inverter. The single-phase single-stage boost inverter usually adopts PWM+SPWM modulatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/501H02M7/5387H02M7/5395
CPCH02M7/501H02M7/53871H02M7/5395
Inventor 秦岭沈家鹏张雷段冰莹钱天泓王亚芳许兴周磊田民高娟张振坤
Owner NANTONG UNIVERSITY
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