Photovoltaic power generation system, power control method thereof, and power optimizers thereof

A photovoltaic power generation system and power optimizer technology, applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve problems such as low reliability and low communication control rate

Active Publication Date: 2017-09-12
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 present invention provides a photovoltaic power generation system and its power control method and

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  • Photovoltaic power generation system, power control method thereof, and power optimizers thereof
  • Photovoltaic power generation system, power control method thereof, and power optimizers thereof
  • Photovoltaic power generation system, power control method thereof, and power optimizers thereof

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Embodiment Construction

[0050] 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.

[0051] The invention provides a photovoltaic power generation system and a power control method thereof to solve the problems of low communication control speed and low reliability in the prior art.

[0052] The power control method of the photovoltaic power generation system is applied to the power optimizer of the photovoltaic power generation system. Specifically, the power control method of the photovoltaic power generation system can be found in figure 1 ,include:

[0053] S101. Obtai...

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Abstract

The invention discloses a power control method of a photovoltaic power generation system and power optimizers thereof. When limiting of output power is required by the photovoltaic power generation system, an inverter is used to limit output current, and therefore rising of direct current busbar voltage and the output voltages of the various power optimizers can be caused, and then the power optimizers are used to compare the own output voltages with a corresponding threshold value, and is used to switch the own operation modes in a real-time manner according to the output voltages. Compared with the control way of the prior art based on communication, response is faster, and reliability is higher.

Description

technical field [0001] The invention relates to the technical field of power control of a photovoltaic power generation system, in particular to a photovoltaic power generation system, a power control method and a power optimizer thereof. Background technique [0002] In a photovoltaic power generation system, when an over-temperature fault occurs in the inverter, it is necessary to adjust the power so that it operates in a reduced power mode; or, when the power grid has a scheduling demand for the feed, it is also necessary to reduce the output power of the inverter. For example, power cuts in medium-voltage grid-connected photovoltaic systems, load reduction in off-grid photovoltaic systems, etc.; in addition, when the grid fails and the AC voltage drops rapidly, the inverter needs to modulate the output active power and Reactive power, meeting the requirements of LVRT (Lowvoltage ride through, low voltage ride through). [0003] In a photovoltaic power generation system ...

Claims

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Application Information

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IPC IPC(8): H02S40/30H02S40/32
CPCH02S40/30H02S40/32Y02E10/50
Inventor 俞雁飞倪华邹云飞杨宗军薛丽英
Owner SUNGROW POWER SUPPLY CO LTD
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