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Photovoltaic power generation system, and control method and device thereof

A technology of photovoltaic power generation system and control method, which is applied in the direction of photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve the problem of high cost, achieve the effect of solving high cost and realizing fast power adjustment

Active Publication Date: 2019-06-14
XUJI GRP +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a photovoltaic power generation system and its control method and device, which are used to solve the problem of high cost when the current photovoltaic power generation system uses an energy storage device for rapid power adjustment

Method used

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

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Embodiment Construction

[0029] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Examples of photovoltaic power generation systems:

[0031] In order to solve the problem of high cost when the current photovoltaic power generation system uses energy storage devices for rapid power regulation, the photovoltaic power generation system in this embodiment includes a controller, 1# inverter, 2# inverter and three The DC / DC modules connected to the array, the output ends of the three DC / DC modules are connected to the DC bus, the DC sides of the 1# inverter and the 2# inverter are connected to the DC bus, and the 1# inverter and the 2# inverter are connected to the DC bus. #The AC side of the inverter is used to connect to the large power grid, such as figure 2 shown.

[0032] In this embodiment, the controller controls the 1# inverter to be responsible for the stability of the DC bus voltage, and its output current itself is unc...

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Abstract

The invention relates to a photovoltaic power generation system, a control method and a device thereof. The photovoltaic power generation system comprises a controller, a first inverter, a second inverter and at least two DC / DC modules for connection with the photovoltaic array, the output terminal of each DC / DC module is connected with a DC bus, both the DC side of the first inverter and the DC side of the second inverter are connected with the DC bus. The AC side of the first inverter and the AC side of the second inverter are used for connecting the power grid, the controller controls the first inverter to control the DC bus voltage to remain stable, the controller controls the second inverter to perform power regulation, and each DC / DC module operates in the maximum power tracking control mode. The invention adjusts the power through the second inverter, which can realize the purpose of rapid power regulation of the photovoltaic power generation system without the participation ofthe energy storage device, and solves the problem of high cost when the photovoltaic power generation system adopts the energy storage device for rapid power regulation.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a photovoltaic power generation system and its control method and device. Background technique [0002] With the increasing development of the photovoltaic power generation industry, the construction of photovoltaic power plants is also changing from the pursuit of scale to high-efficiency power generation. The distributed scheme is considered from the perspective of the entire photovoltaic system. Compared with the traditional centralized scheme, it can not only improve power generation efficiency, but also The power generation efficiency of the string scheme is basically the same, but the initial investment cost has dropped significantly. Therefore, the distributed photovoltaic power generation system has attracted more and more attention from the industry. [0003] The distributed photovoltaic inverter system is a grid-connected scheme with ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02S40/32
CPCY02E10/56
Inventor 马红伟郭宝甫徐军杨慧彪田盈张鹏丁茂生李旭涛顾雨嘉梁剑
Owner XUJI GRP
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