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Synchronous rectification system and control method for improving power generation energy efficiency of solar photovoltaic power generation

A synchronous rectification and DC current technology, applied in the field of solar photovoltaic power generation, can solve the problems of low battery life and low energy efficiency of solar panels, and achieve the effect of prolonging life, solving hot spot problem and low cost.

Inactive Publication Date: 2016-01-06
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0007] my country's photovoltaic power generation is mainly based on large-scale photovoltaic power plants. The centralized photovoltaic inverters or string photovoltaic inverters used generally have the problem of low energy efficiency of the battery panels, and at the same time, the service life of the battery panels is low due to the hot spot effect.

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  • Synchronous rectification system and control method for improving power generation energy efficiency of solar photovoltaic power generation

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0043] Please see first figure 2 , figure 2 It is a block diagram of a buck-based synchronous rectification device for improving the energy efficiency of solar photovoltaic power generation in the present invention. As shown in the figure, a synchronous rectification device includes a reactor 2, a first power switch tube 3, a second power switch tube 4, an input filter capacitor 5, an output filter capacitor 6, a DC voltage sensor 7, a DC current sensor 8 and control unit 9;

[0044] One end of the reactor 2 is connected to the positive end of the output filter capacitor 6, and the other end of the reactor 2 is connected to the connection point between the first power switch tube 3 and the second power switch tube 4;

[0045] One end of the first power switch tube 3 is...

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Abstract

The invention discloses a synchronous rectification apparatus for improving power generation energy efficiency of solar photovoltaic power generation. The synchronous rectification apparatus is applied to each photovoltaic cell panel for performing maximum power point tracking (namely MPPT) on the each photovoltaic cell panel, consequently, the power generation energy efficiency of centralized type or group-clustered type photovoltaic power stations is greatly improved, the service life of the cell panels is prolonged at the same time, and the integral conversion efficiency of the synchronous rectification apparatus is improved; the invention also discloses a synchronous rectification control method on the basis of the synchronous rectification apparatus; the MPPT control on single photovoltaic cell panel is realized, and the output voltage of the synchronous rectification apparatus is optimized as well, so that the integral energy efficiency of the solar photovoltaic power generation system is higher.

Description

technical field [0001] The invention relates to the field of solar photovoltaic power generation, in particular to a synchronous rectification device, a synchronous rectification system and a control method for improving the energy efficiency of solar photovoltaic power generation. Background technique [0002] Energy is an important material basis for the survival and development of human beings, and it is also an important factor affecting national security. Traditional petrochemical energy belongs to non-renewable energy and is facing the danger of depletion. On the other hand, due to the burning of fossil fuels, the atmosphere is heavily polluted. [0003] In order to solve the major problem of energy supply, countries all over the world have accelerated the development of new energy sources. As a clean energy, solar energy has the following characteristics: First, it is inexhaustible. Second, it is easily accessible and ubiquitous. Third, clean and pollution-free. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10H02S40/32
CPCY02E10/56
Inventor 李国杰解大张延迟
Owner SHANGHAI JIAO TONG UNIV
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