Interleaving fly-back photovoltaic inverter

A technology of anti-photovoltaic inverter and photovoltaic inverter, which is applied in the direction of photovoltaic power generation, output power conversion device, AC power input conversion to DC power output, etc. Advanced issues to achieve the effect of ensuring stable output and improving utilization

Active Publication Date: 2013-01-02
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to overcome the deficiencies of existing inverters such as poor voltage adaptability, poor stability, and low solar energy utilization rate, the present

Method used

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  • Interleaving fly-back photovoltaic inverter
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  • Interleaving fly-back photovoltaic inverter

Examples

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[0014] The present invention will be further described below in conjunction with the drawings.

[0015] Reference Figure 1 ~ Figure 4 , An interleaved parallel inverse laser volt inverter device, comprising a photovoltaic inverter, the photovoltaic inverter is composed of a DC / DC conversion circuit, a DC / AC inverter circuit and an LC filter circuit, the DC / DC conversion circuit Two single-ended flyback circuits with parallel inputs and outputs are adopted. The DC / AC inverter circuit is a DC / AC full-bridge inverter circuit composed of four switch tubes. The DC / DC conversion circuit is simultaneously connected to the filter capacitor. , The DC / AC inverter circuit is connected in parallel, and the DC / AC inverter circuit is connected with the LC filter circuit;

[0016] The interleaved parallel inverted laser volt inverter device also includes a controller and a drive module. The controller includes a DC input signal feedback terminal, an output voltage signal feedback terminal, and ...

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Abstract

The invention provides an interleaving fly-back photovoltaic inverter, which comprises a photovoltaic inverter. A DC/DC switch circuit comprises two single-end fly-back circuits of which the input and output are connected in parallel; a DC/AC inversion circuit is a DC/AC full-bridge inversion circuit consisting of four switch tubes; the DC/DC switch circuit is simultaneously connected in parallel with a filtration capacitor and a DC/AC inversion circuit; and the DC/AC inversion circuit is connected with an LC filtration circuit. The interleaving fly-back photovoltaic inverter further comprises a controller and a driving module, wherein the controller comprises a DC input signal feedback end, an output voltage signal feedback end and a control signal end; the control signal end is connected with the driving module; and the driving module is connected with the photovoltaic inverter. The interleaving fly-back photovoltaic inverter has the advantages of outstanding voltage adaptability, good stability and high solar utilization rate.

Description

technical field [0001] The invention relates to photovoltaic inverter technology, in particular to a photovoltaic inverter. Background technique [0002] With the increasing development of social production, human's demand for energy continues to grow, and traditional fossil energy is no longer enough to meet the demand. In recent years, photovoltaic technology has been greatly developed, and the application occasions of solar products have also expanded to all aspects of production and life. However, the price of solar cells is high, and its utilization rate is relatively low, so there are still certain difficulties in large-scale promotion. [0003] Since the output DC voltage of photovoltaic cells is easily changed by the change of light intensity, most of the existing inverters on the market are stable DC input, which has poor adaptability to the changing output DC voltage of photovoltaic cells. In the photovoltaic power generation system, it cannot adapt to the photov...

Claims

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Application Information

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IPC IPC(8): H02M7/48H02M3/335H02M7/5387
CPCY02E10/56
Inventor 陈国定黄学宇薛东饶宁
Owner ZHEJIANG UNIV OF TECH
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