Modular photovoltaic power electronic converter based on coupling inductance

A technology of coupled inductance and power electronics, used in photovoltaic power generation, current collectors, regulating electrical variables, etc., can solve the problems of increasing the complexity of the control method, reducing the system stability, and losing the duty cycle, so as to reduce the loss of the duty cycle. phenomenon, improved efficiency, and the effect of low switching loss

Inactive Publication Date: 2012-07-11
SHANGHAI DIANJI UNIV
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Problems solved by technology

At present, the phase-shifted full-bridge circuit is the most widely used DC/DC converter. It has a simple structure and high work efficiency, but it has the problem of duty cycle loss.
In order to solve this problem, the existing improvement method is to add auxi

Method used

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  • Modular photovoltaic power electronic converter based on coupling inductance
  • Modular photovoltaic power electronic converter based on coupling inductance
  • Modular photovoltaic power electronic converter based on coupling inductance

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Example Embodiment

[0030] The following describes the specific implementation of the coupled inductor-based modular photovoltaic power electronic converter of the present invention in conjunction with the accompanying drawings, but the implementation of the present invention is not limited to the following embodiments.

[0031] See attached figure 1 . A modular photovoltaic power electronic converter based on coupled inductors, including solar panel 1, maximum power point tracking circuit 2, photovoltaic converter 3 composed of a DC / DC phase-shifted full bridge 4 and a DC / AC inverter bridge 5 , Load 6 and battery 7, the solar cell 1 panel has an energy storage link, the battery 7 is charged after the maximum power point tracking circuit 2, and then boosted and reversed by the photovoltaic converter 3, and finally output AC power to the load 6. The characteristic structure of the present invention is the part from 43-53VDC of battery 7 to 220VAC of load 6 terminal. figure 1 in:

[0032] V in Indic...

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Abstract

The invention relates to a modular photovoltaic power electronic converter based on coupling inductance, which comprises a solar-cell panel, a maximum power point tracking circuit, a photovoltaic converter, load and a storage battery. The photovoltaic converter is formed by a direct current/ direct current (DC/DC) phase shifted full bridge and a direct current/ alternating current (DC/AC) inversion bridge. The coupling inductance is introduced to the voltage-multiplying rectification side of a DC/DC phase shifted full bridge circuit. The coupling inductance can not only quickly reduce primary side circulation current through the coupling effect to reduce duty ratio loss accordingly but also ensure the filtering effect of power frequency half-sinusoid voltage modulated by sinusoidal pulse width modulation (SPWM) and output by the voltage-multiplying rectification side of the DC/DC phase shifted full bridge circuit and can achieve a leading arm zero voltage switch of a phase shifted full bridge circuit. Alternating current electricity is output at the DC/AC grade through the power frequency inversion bridge. The converter is simple in structure, low in cost, high in efficiency, easy to achieve and capable of being used in not only a photovoltaic system but also other new energy systems.

Description

technical field [0001] The invention relates to a power electronic converter, which is a modular photovoltaic power electronic converter based on a coupled inductance that places a coupled inductance on the side of a voltage doubler rectifier to realize functions such as filtering, switching, and reducing duty cycle loss. It can be used in modules In photovoltaic systems, it can also be used in other new energy inverter links. Background technique [0002] New energy photovoltaic power generation technology is an emerging industry that is currently receiving much attention and vigorously developing. In order to maximize the efficiency of solar panels and meet the requirements of flexible design of photovoltaic power generation products, more and more attention has been paid to modular photovoltaic power generation systems, which has become one of the development trends of photovoltaic power generation technology. [0003] In the modular photovoltaic power generation system,...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M7/5395H02J7/00
CPCY02E10/56
Inventor 蒋赢刘军胡鹏张海燕
Owner SHANGHAI DIANJI UNIV
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