Photovoltaic power generation system and assembly IV curve scanning method thereof

A technology of a photovoltaic power generation system and a scanning method, which is applied in the field of photovoltaic power generation, can solve problems such as large fluctuations in system output power, and achieve the effect of avoiding large fluctuations in system output power.

Active Publication Date: 2017-09-22
SUNGROW POWER SUPPLY CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a photovoltaic power generation system and its component IV curve s

Method used

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  • Photovoltaic power generation system and assembly IV curve scanning method thereof
  • Photovoltaic power generation system and assembly IV curve scanning method thereof
  • Photovoltaic power generation system and assembly IV curve scanning method thereof

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Embodiment Construction

[0043] 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.

[0044] The invention provides a component IV curve scanning method of a photovoltaic power generation system to solve the problem of large system output power fluctuations in the prior art.

[0045] The component IV curve scanning method of the photovoltaic power generation system is applied to each power optimizer in the photovoltaic power generation system, and the input end of each power optimizer is connected to at least one component; specifically, the component IV curve scanning method...

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Abstract

The invention provides a photovoltaic power generation system and an assembly IV curve scanning method thereof. Assembly IV curve scanning is performed at different moments by taking group as unit according to a preset grouping rule and an assembly IV curve scanning instruction after the assembly IV curve scanning instruction sent from an upper computer is received by each power optimizer, and scanning data is uploaded. IV curve scanning is performed on a connection assembly connected with the power optimizer at each moment only by a group of power optimizer, the other power optimizers and corresponding assemblies are all in normal working conditions, thus, relatively small influence on an output power of the system is generated, and the problem of large output power fluctuation of the system in the prior art is prevented.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power generation system and an IV curve scanning method of components thereof. Background technique [0002] Photovoltaic power generation systems are usually composed of photovoltaic modules, strings, combiner boxes, inverters and other equipment. According to the difference in the open circuit voltage of a single photovoltaic module and the input voltage of the inverter, the number of modules in each string is different. If the maximum power point of the photovoltaic strings in the photovoltaic array is inconsistent, or there are components with poor performance, the output power of the inverter will be reduced, which will affect the power generation efficiency. The component delivers current, creating a hot spot. [0003] The current technical solution can obtain the IV curve of the entire string by adjusting the bus voltage of the inverte...

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Application Information

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IPC IPC(8): H02S50/15
CPCH02S50/15Y02E10/50
Inventor 邹云飞张鹏俞雁飞倪华杨宗军詹亮
Owner SUNGROW POWER SUPPLY CO LTD
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