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A single-phase single-stage boost inverter and its control method

A single-stage, inverter technology, applied in the conversion device and electrical components of AC power input to DC power output, output power, etc., can solve the problem that the conversion efficiency is difficult to further improve, the number of components is large, the overall cost and size Large and other problems, to achieve the effect of increasing the equivalent switching frequency of the system, high system efficiency, and simple structure

Active Publication Date: 2022-03-11
NANTONG UNIVERSITY
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  • 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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  • A single-phase single-stage boost inverter and its control method
  • A single-phase single-stage boost inverter and its control method
  • A single-phase single-stage boost inverter and its 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 thereof. The inverter includes a switch tube S 1 ~S 6 , DC bus capacitor C dc , input power U in , the first boost inductor L 1 , the second boost inductor L 2 , filter capacitor C f , filter inductance L f . Compared with the traditional interleaved parallel Boost+VSI two-stage scheme, the present invention not only doubles the equivalent switching frequency of the system, reduces the input current ripple rate, thereby reducing the size of the required filter device, but also The use of two power diodes is reduced, and the boost and inverter control are realized at the same time through only one stage of power conversion, which makes the system have higher integration and system efficiency. In addition, it has continuous input current, simple structure, and low cost. Advantages, and has the ability to suppress the common mode current. Therefore, the present invention is particularly suitable for large-power distributed grid-connected power generation systems.

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 Patents(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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