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Serial-connection-type photovoltaic square matrix

A photovoltaic square array and series technology, applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve problems such as transmission lines and supporting equipment loss

Inactive Publication Date: 2014-10-22
北京科诺伟业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the existing method of using strings in parallel to increase power generation caused by serious losses in transmission lines and supporting equipment, and propose a series photovoltaic square array

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] The series photovoltaic array of the present invention is composed of n photovoltaic string power units in series, which are: photovoltaic string power unit 1, photovoltaic string power unit 2, photovoltaic string power unit 3...photovoltaic string power unit n. The photovoltaic string power unit consists of a photovoltaic string and a photovoltaic string high-voltage isolation power regulation module connected in series.

[0045] The output end of the photovoltaic string is connected to the input end of the photovoltaic string high-voltage isolation power adjustment module, and is output through the DC / DC isolation port of the photovoltaic string high-voltage isolation power adjustment module.

[0046] In the photovoltaic string power unit, the output terminals Vzn+ and Vzn- ​​of the photovoltaic string are respectively connected to the...

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Abstract

Disclosed is a serial-connection-type photovoltaic square matrix which is characterized in that the photovoltaic square matrix is formed through serial connection of n photovoltaic string power units, wherein n is larger than 1; and the photovoltaic string power units are formed through serial connection of photovoltaic strings and photovoltaic string high-voltage isolation power control modules. Output ends of the photovoltaic strings are connected with input ends of the photovoltaic string high-voltage isolation power control modules, and via output by DC / DC isolation ports of the photovoltaic string high-voltage isolation power control modules, a withstand voltage of each photovoltaic string power unit is larger than a voltage Usmax of a DC system.

Description

technical field [0001] The invention relates to a photovoltaic string array of a solar photovoltaic power generation system. Background technique [0002] At present, photovoltaic power plants are developing rapidly under the encouragement of national policies, and photovoltaic arrays are one of the important components of photovoltaic power generation systems, and the size of arrays composed of photovoltaic strings in series and parallel directly affects the power generation of the system. The photovoltaic string is composed of several photovoltaic modules connected in series, and the module is the smallest unit of the string, and the number of series connection is up to 22. The reason mainly depends on the withstand voltage of the modules. At present, the string voltage of domestic and foreign components connected in series is ≤1000V, and the maximum power is ≤7kWp. In order to increase the amount of power generation, there are currently two methods at home and abroad: on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/30H02S40/36H02S30/00
CPCY02E10/50
Inventor 王哲许兰刚定世攀刘丽敏王胜利
Owner 北京科诺伟业科技股份有限公司
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