CN214591315U

CN214591315U - Photovoltaic group string with series-parallel structure

Info

Publication number: CN214591315U
Application number: CN202120907045.2U
Authority: CN
Inventors: 彭文博; 高虎; 李晓磊; 田鸿翔; 郑建涛
Original assignee: Huaneng Clean Energy Research Institute; Huaneng Group Technology Innovation Center Co Ltd
Current assignee: Huaneng Clean Energy Research Institute; Huaneng Group Technology Innovation Center Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-02
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a photovoltaic string with a series-parallel structure, which comprises a plurality of photovoltaic strings; each photovoltaic group string comprises a plurality of photovoltaic components which are connected in series; and corresponding photovoltaic modules in all the photovoltaic group strings are connected in parallel. When the photovoltaic strings with the series-parallel structure work, and one photovoltaic module in a certain photovoltaic string is damaged, the other photovoltaic strings connected in parallel are shunted, so that mismatching is reduced; other photovoltaic modules in the photovoltaic group string can still work normally, so that the power generation performance of the whole system is improved. The technical problems that in an existing series structure, when a certain photovoltaic module is damaged, mismatch can only be generated by conducting a bypass diode and the like, the operation of other intact photovoltaic modules under the series is maintained at low efficiency, and the loss of the power generation performance of the system is large are solved effectively.

Description

Photovoltaic group string with series-parallel structure

Technical Field

The utility model belongs to the technical field of solar energy, in particular to photovoltaic group cluster.

Background

76% of China's homeland illumination is abundant, the light energy resource distribution is relatively uniform, the photovoltaic power generation has no noise and pollutant discharge, the application technology is mature, and the method is safe and reliable. Solar energy is the cleanest, safe and reliable energy source in the future, the developed countries are planning the development and utilization of solar energy as the main content of the energy revolution for a long time, and the photovoltaic industry is increasingly becoming an explosion-type development industry after the IT and microelectronic industries in the world.

The photovoltaic module for photovoltaic power generation comprises a high-efficiency crystalline silicon solar cell, a back plate, a frame and the like.

Referring to fig. 1, in a conventional pv string structure, a plurality of pv modules 1 are connected in series to form a pv string 2.

Referring to fig. 2, in the conventional photovoltaic string structure, when a certain photovoltaic module 1 is damaged, only by means of conducting a bypass diode, etc., mismatch is generated, so that the remaining intact photovoltaic modules 1 under the string are maintained to operate at a lower efficiency, and the power generation performance loss of the system is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic group cluster of series-parallel structure to solve above-mentioned technical problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a photovoltaic string with a series-parallel structure comprises a plurality of photovoltaic strings;

each photovoltaic group string comprises a plurality of photovoltaic components which are connected in series;

and corresponding photovoltaic modules in all the photovoltaic group strings are connected in parallel.

The utility model discloses further improvement lies in: the photovoltaic array comprises N photovoltaic array strings; n is a positive integer, and N is more than or equal to 2.

The utility model discloses further improvement lies in: the photovoltaic module is a GaAs single-section solar cell, a single-section dye-sensitized solar cell, a single-junction silicon thin-film solar cell, a crystalline silicon solar cell, a cadmium telluride solar cell or a copper indium gallium selenide solar cell.

The utility model discloses further improvement lies in: and all the photovoltaic modules in the photovoltaic group string are connected in series through the wires.

The utility model discloses further improvement lies in: and all the photovoltaic modules in the photovoltaic group string are connected in series through the quick plugs.

The utility model discloses further improvement lies in: and corresponding photovoltaic modules in adjacent photovoltaic group strings are connected in parallel through wires.

The utility model discloses further improvement lies in: and corresponding photovoltaic modules in adjacent photovoltaic group strings are connected in parallel through the quick plugs.

The utility model discloses further improvement lies in: the number of the photovoltaic modules in all the photovoltaic module strings is the same, and the specifications are the same.

Compared with the prior art, the utility model discloses following beneficial effect has:

a photovoltaic string with a series-parallel structure comprises a plurality of photovoltaic strings; each photovoltaic group string comprises a plurality of photovoltaic components which are connected in series; and corresponding photovoltaic modules in all the photovoltaic group strings are connected in parallel. When one photovoltaic module in a certain photovoltaic string is damaged, shunting is carried out through other photovoltaic strings connected in parallel, so as to reduce mismatching; other photovoltaic modules in the photovoltaic group string can still work normally, so that the power generation performance of the whole system is improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a conventional photovoltaic string structure;

FIG. 2 is a schematic diagram of a conventional photovoltaic string structure with a damaged photovoltaic module;

FIG. 3 is a schematic diagram of a series-parallel configuration of photovoltaic strings;

fig. 4 is a schematic diagram of a series-parallel structure of a photovoltaic string in which a photovoltaic module is damaged.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention.

Referring to fig. 3, the present invention provides a photovoltaic string with a series-parallel structure, which includes a plurality of photovoltaic modules 1; a plurality of photovoltaic modules 1 are connected in series to form a photovoltaic module string 2.

The utility model relates to a photovoltaic group cluster of series-parallel structure includes two at least strings of photovoltaic group clusters 2.

The photovoltaic modules 1 in one photovoltaic string 2 are connected in parallel with the corresponding photovoltaic modules 1 in the adjacent photovoltaic string 2 to form a series-parallel structure of all the photovoltaic modules.

The utility model discloses in, any solar cell can be chooseed for use to photovoltaic module 1, for example: GaAs single solar cell, single dye sensitized solar cell, single junction silicon thin film solar cell, crystalline silicon solar cell, cadmium telluride solar cell, copper indium gallium selenide solar cell and the like.

The utility model discloses in, photovoltaic module 1 establishes ties each other and realizes switching on through wire direct welding or through quick plug butt joint.

The utility model discloses in, photovoltaic module 1 connects in parallel each other and realizes switching on through wire direct welding or through quick plug butt joint.

Referring to fig. 4, when a photovoltaic string with a series-parallel structure of the present invention works, and one photovoltaic module 1 in a certain photovoltaic string 2 is damaged, the other photovoltaic strings 2 connected in parallel are shunted to reduce the mismatch; other photovoltaic modules 1 in the photovoltaic string 2 can still work normally, so that the power generation performance of the whole system is improved.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. A photovoltaic string with a series-parallel structure is characterized by comprising a plurality of photovoltaic strings (2);

each photovoltaic group string (2) comprises a plurality of photovoltaic modules (1) which are connected in series;

the corresponding photovoltaic modules (1) in all the photovoltaic group strings (2) are connected in parallel.

2. The photovoltaic string in series-parallel connection structure according to claim 1, comprising N strings of photovoltaic strings (2); n is a positive integer, and N is more than or equal to 2.

3. The photovoltaic string in series-parallel structure according to claim 1, wherein the photovoltaic module (1) is a GaAs single-cell solar cell, a single-cell dye-sensitized solar cell, a single-junction silicon thin-film solar cell, a crystalline silicon solar cell, a cadmium telluride solar cell or a copper indium gallium selenide solar cell.

4. The photovoltaic string in series-parallel connection structure as claimed in claim 1, wherein the photovoltaic modules (1) in the photovoltaic string (2) are connected in series through wires.

5. The photovoltaic string in series-parallel connection structure as claimed in claim 1, wherein the photovoltaic modules (1) in the photovoltaic string (2) are connected in series through quick plugs.

6. The photovoltaic string with series-parallel structure as claimed in claim 1, wherein corresponding photovoltaic modules (1) in adjacent photovoltaic strings (2) are connected in parallel through wires.

7. The photovoltaic string with series-parallel structure as claimed in claim 1, wherein corresponding photovoltaic modules (1) in adjacent photovoltaic strings (2) are connected in parallel through a quick plug.

8. The photovoltaic string with a series-parallel structure according to claim 1, wherein the photovoltaic modules (1) in all the photovoltaic strings (2) have the same number and the same specification.