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Single-phase single-stage boost inverter and control method

A control method and single-stage technology, applied in the direction of converting AC power input to DC power output, output power conversion devices, electrical components, etc., can solve the problem of large overall cost and volume, difficult to further improve conversion efficiency, and large number of devices. and other problems, to achieve the effects of simple structure, improved system equivalent switching frequency, and high system efficiency

Active Publication Date: 2021-04-30
NANTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this architecture requires a large number of devices, the overall cost and volume are still large, and it is difficult to further improve the conversion efficiency

Method used

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  • Single-phase single-stage boost inverter and control method
  • Single-phase single-stage boost inverter and control method
  • Single-phase single-stage boost inverter and control method

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0038] figure 2 A schematic diagram of a circuit structure of a single-phase single-stage boost inverter according to an embodiment of the present application is shown. As an exemplary and non-limiting embodiment, the inverter includes a DC bus capacitor C dc , the first switch tube S 1 , the second switch tube S 2 , the third switch tube S 3 , the fourth switch tube S 4 , the fifth switch tube S 5 , the sixth switch tube S 6 , input p...

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Abstract

The invention discloses a single-phase single-stage boost inverter and a control method. The single-phase single-stage boost inverter comprises switching tubes S1-S6, a direct-current bus capacitor Cdc, an input power supply Uin, a first boost inductor L1, a second boost inductor L2, a filter capacitor Cf and a filter inductor Lf. Compared with a traditional interleaved Boost+VSI two-stage scheme, the equivalent switching frequency of the system is doubled, and the input current pulsation rate is reduced, so that the size of a required filter device is reduced, the use of two power diodes is reduced, boosting and inversion control are realized at the same time only through one-stage power conversion, therefore, the system has higher integration level and system efficiency, has the advantages of continuous input current, simple structure, low cost and the like, and also has the capability of inhibiting common-mode current. Therefore, the single-phase single-stage boost inverter is particularly suitable for a high-power distributed grid-connected power generation system.

Description

technical field [0001] The present application relates to an inverter and a control method thereof, in particular to a single-phase single-stage boost inverter and a control method thereof. Background technique [0002] In recent years, renewable energy distributed power generation systems have developed rapidly. In these power systems, the input side is usually a photovoltaic cell, a fuel cell or a storage battery, and its output voltage is low and has a large fluctuation range. Therefore, in order to meet the voltage requirements of the grid or AC load equipment, the distributed generation system generally adopts a two-stage structure of Boost converter cascaded voltage source inverter (Voltage Source Inverter, VSI). In high-power applications, the switching frequency of the pre-stage Boost converter is often low to reduce switching losses and improve conversion efficiency. However, in order to suppress the input current ripple, the size of the filter device needs to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387
CPCH02M7/53871
Inventor 秦岭周磊马宇昂钱天泓田民许兴段冰莹沈家鹏高娟
Owner NANTONG UNIVERSITY
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