A CCM single-bridge integrated single-phase boost inverter and its control method

A control method and single-arm technology, applied in the direction of AC power input conversion to DC power output, output power conversion device, climate sustainability, etc., can solve the problems of wide-range input voltage variation and output power cannot be adjusted, etc. Achieve the effects of low capacitor voltage stress, improved system reliability, and strong boost capability

Active Publication Date: 2021-10-26
NANTONG UNIVERSITY
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  • Claims
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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

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  • A CCM single-bridge integrated single-phase boost inverter and its control method
  • A CCM single-bridge integrated single-phase boost inverter and its control method
  • A CCM single-bridge integrated single-phase boost inverter and its 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. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without 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 1...

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Abstract

The invention discloses a CCM single bridge arm integrated single-phase boost inverter and a control method. Compared with the traditional Boost integrated boost inverter, the inverter proposed in the present invention only adds one inductor, one capacitor and one diode, and realizes the high-gain boost inverter in the CCM mode. Due to the continuous input current, the current stress and on-state loss of the inductor and power tube will be greatly reduced, and the boost capacity will not change sharply with the load power, which improves the system reliability; moreover, the boost bridge arm can use PWM control is used for voltage regulation, so it is suitable for photovoltaic power generation, independent inverters and other step-up inverter occasions where the output power cannot be adjusted and the input voltage varies in a wide range, and the application range is wider. In addition, it also has the advantages of strong boosting capability, high conversion efficiency, low capacitive voltage stress, simple structure, and low cost.

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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Patent Type & Authority Patents(China)
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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