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Direct-current photovoltaic power generation system

A technology of photovoltaic power generation system and DC power grid, which is applied in the parallel operation of DC power supply and other directions, can solve problems such as low efficiency, and achieve the effect of solving low efficiency.

Active Publication Date: 2017-06-20
SUNGROW POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a DC photovoltaic power generation system to solve the problem of low efficiency caused by the use of a two-stage DC / DC system in the prior art

Method used

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the 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 creative efforts fall within the protection scope of this application.

[0056] The invention provides a direct current photovoltaic power generation system to solve the problem of low efficiency caused by adopting a two-stage DC / DC system in the prior art.

[0057] Specifically, the DC photovoltaic power generation system, see figure 1 and figure 2 , including: a plurality of power optimizers 101 and an intelligent management device 102; wherein:

[0058] The input end of each power optimizer 101 is connected to at least one photovoltaic module;

[0059] The ...

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Abstract

The invention provides a direct-current photovoltaic power generation system. At least one photovoltaic module is connected via an input terminal of each power optimizer, an optimizer group is formed by serial connection of output terminals of the plurality of power optimizers, and an intelligent management device is adopted to aggregate the plurality of optimizer groups, so that communication between the external and each power optimizer is realized, each power optimizer is controlled to run in a corresponding mode, and grid-connected power generation or grid disconnection is carried out. In the invention, grid-connected power generation is realized by using the single-stage power optimizers in combination with the intelligent management device instead of a two-stage DC / DC system of the prior art, and the problem of low efficiency of the prior art due to the application of the two-stage DC / DC system is solved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation systems, in particular to a direct current photovoltaic power generation system. Background technique [0002] At present, the power optimizer is used with the inverter for grid-connected power generation, which has been widely used in the photovoltaic power generation system of the AC grid. The power optimizer is used to realize the maximum power tracking function, and the inverter is responsible for the DC / AC inversion. [0003] With the advancement and development of technology, DC power grids, such as DC microgrids and smart home DC power supply systems, will become a form of power supply system in the future; and DC energy storage systems are also a future trend. However, the existing power optimizer plus inverter architecture is aimed at the AC grid, rather than the DC grid and DC energy storage system. The existing application of DC grid and DC energy storage system i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/12
CPCH02J1/12
Inventor 王新宇徐君顾亦磊
Owner SUNGROW POWER SUPPLY CO LTD
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