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CCM single-bridge-arm integrated single-phase boost inverter and control method

A control method and single-arm technology, applied in the direction of converting AC power input to DC power output, photovoltaic power generation, high-efficiency power electronic conversion, etc. Low stress, improved system reliability, high gain boost inverter effect

Active Publication Date: 2020-08-28
NANTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With this modulation strategy, figure 1 The traditional single-leg integrated Boost inverter shown can better solve the DC bus voltage regulation and over-modulation problems, but it cannot be used for photovoltaic power generation, independent inverters, etc. The output power cannot be adjusted, and the input voltage varies in a wide range. The step-up inverter occasion

Method used

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  • CCM single-bridge-arm integrated single-phase boost inverter and control method

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Embodiment Construction

[0036] 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.

[0037] figure 2 A schematic diagram of a circuit structure of a CCM single-leg integrated single-phase boost inverter according to an embodiment of the present application is shown. As an exemplary and non-limiting embodiment, the single-leg integrated single-phase boost inverter includes a full-bridge circuit, a filter circuit, and a DC bus capacitor C dc , the first boost inductor L 1 , the second boost inductor L 2 , the first diode D ...

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Abstract

The invention discloses a CCM single-bridge-arm integrated single-phase boost inverter and a control method. Compared with a traditional Boost integrated boost inverter, the inverter provided by the invention has the advantage that high-gain boost inversion in a CCM mode is realized by only additionally arranging one inductor, one capacitor and one diode. Because the input current is continuous, the current stress and the on-state loss of the inductor and the power tube are greatly reduced, the boosting capability does not change sharply along with the load power, and the system reliability isimproved; moreover, the boost bridge arm can adopt PWM control for voltage regulation, so that the inverter is suitable for various boost inversion occasions where the output power cannot be adjustedand the input voltage changes in a wide range such as photovoltaic power generation and independent inversion, and the application range is wider. In addition, the inverter also has the advantages ofstrong boosting capability, high conversion efficiency, low capacitor voltage stress, simple structure, low cost and the like.

Description

technical field [0001] The present application relates to an inverter and a control method thereof, in particular to a CCM single-bridge integrated single-phase 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 power grid or AC load equipment, distributed generation systems generally adopt a two-stage structure of Boost converters cascaded with voltage source full-bridge inverters. The control of this scheme is relatively simple, but the number of components is large, the cost is high, and the volume is large. For this reason, some scholars have proposed an integrated boost inverter, which integrates the front-stage boost convert...

Claims

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Application Information

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IPC IPC(8): H02M7/5387H02M7/5395
CPCH02M7/53871H02M7/5395H02M1/0054Y02B70/10Y02E10/56
Inventor 秦岭周磊田民钱天泓沈家鹏高娟尹铭段冰莹
Owner NANTONG UNIVERSITY
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