CN215185886U

CN215185886U - Photovoltaic power generation device supporting array application

Info

Publication number: CN215185886U
Application number: CN202121543207.5U
Authority: CN
Inventors: 樊朝晖; 熊俞超; 沈虹; 王琳; 戴鹏; 徐淑法; 岳严霜; 瞿云峰
Original assignee: Zhiyi New Energy Development Co ltd
Current assignee: Zhiyi New Energy Development Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-12-14
Anticipated expiration: 2031-07-07

Abstract

The utility model provides a photovoltaic power generation device supporting array application, wherein a plurality of photovoltaic power generation units are arranged on a mounting rack in a matrix form; the photovoltaic power generation unit comprises a photovoltaic panel body and a conveying module, wherein direct current generated by the photovoltaic panel body forms constant-voltage direct current through the conveying module, the constant-voltage direct current runs in a source network direct current networking mode, and then is dynamically converged on a direct current bus bar, so that the constant-voltage direct current can be effectively merged into a storage network or a power generation and storage network without any other conversion, and the conversion efficiency is improved; the shunt and confluence characteristics of direct current are fully utilized, dynamic power energy storage hybrid motion is implemented, and each energy is effectively excavated. Moreover, standardized photovoltaic power generation unit matrix is arranged and is installed on the mounting bracket, and construction cost is controllable, and can realize standardized, extensive batch production, effectively reduces production construction cost, and the utilization ratio of the light facing area is far higher than the utilization ratio of traditional centralized photovoltaic power generation field, effectively improves the utilization ratio of electric energy, installation economy.

Description

Photovoltaic power generation device supporting array application

Technical Field

The utility model relates to a photovoltaic energy power generation field, concretely relates to support photovoltaic power generation device that array ization was used.

Background

Photovoltaic power generation is a new energy source, and a large amount of resources are put into China for a long time to build a plurality of centralized photovoltaic power generation fields; the traditional centralized photovoltaic power generation system has dispersed conversion and alternating current control and high complexity and cost; furthermore, due to the change of sunlight irradiation, the generated power changes along with the change, the generated power fluctuation can exceed more than 80% due to one cloud shielding, the randomness is very strong, great trouble is brought to the power flow control of the power grid in the process of being incorporated into the power grid (the comprehensive peak regulation and absorption capacity of the power grid in China is about 3%), according to statistics, the total rejection rate of wind and light abandonment problems in China is as high as 60%, the photovoltaic energy is abandoned in large quantity, the effective utilization rate is low, and the resource waste is caused.

How to effectively utilize emerging power generation energy becomes a major issue for the popularization of new energy technology. With the practical development of the architecture system of the storage and distribution micro-grid and the power generation and storage network, on the premise of solving the problem of light abandonment, a brand new standardized photovoltaic power generation device is researched and developed and industrialization is realized, so that the current key work of research and development personnel is realized.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a support photovoltaic power generation device that array ization was used flows in the storage and distribution microgrid through the level voltage direct current that its modularization, standardized photovoltaic power generation unit sent, and can realize standardized, extensive batch production, and the installation is arranged to the matrix and is built, effectively reduces production construction cost to production construction cost is high, the low problem that causes the wasting of resources among the prior art has been solved to the matrix.

In order to achieve the above object, the utility model provides a following technical scheme: a photovoltaic power generation device supporting array application comprises a plurality of photovoltaic power generation units and a mounting rack, wherein the photovoltaic power generation units are arranged on the mounting rack in a matrix manner; the photovoltaic power generation unit comprises a photovoltaic panel body and a transmission module, the transmission module comprises a direct current voltage conversion module and a power limiting module, the photovoltaic panel body sends direct current, the direct current voltage conversion module converts the direct current voltage into target voltage, the power limiting module limits the power, the direct current voltage is finally dynamically converged on a direct current busbar, and the direct current busbar is connected with the storage and distribution micro grid.

Furthermore, a control module is connected in parallel between two ends of the direct current voltage conversion module.

Furthermore, the control module is provided with an acquisition module, and the acquisition module acquires direct current voltage and current information at the front end of the voltage conversion module.

Further, the acquisition module acquires an input communication instruction.

Further, the power limiting module is a power diode.

Further, the direct current voltage conversion module is a DC/DC power converter.

Further, the mounting rack comprises a building base and a connecting rack arranged on the building base, and the power generation units are uniformly distributed on the connecting rack.

Further, the link includes horizontal pipe assembly and standpipe assembly, horizontal pipe assembly with standpipe assembly is the regularity and connects.

The utility model has the advantages that:

1. the standardized photovoltaic power generation units arranged and installed in a matrix form can be controlled in construction cost, and standardized and large-scale batch production can be realized, so that the production and construction cost is effectively reduced, the utilization rate of electric energy is effectively improved, and the installation economy is improved; the integrated energy storage battery system has stronger channel overcurrent capacity and convergence capacity than a traditional integrated energy storage battery system, can bear repeated high-frequency random charge and discharge, has dynamic self-repairing capacity in the process, and has a service life enough to support the service life requirement of an electric power system.

2. Electricity generated by the photovoltaic power generation unit through the conveying module is constant-voltage direct current, and can be effectively merged into a storage and distribution network, so that the conversion efficiency is improved; the shunt and confluence characteristics of direct current are fully utilized, dynamic power energy storage hybrid motion is implemented, and each energy is effectively excavated.

3. The utility model discloses have the arrayed combined function, adopt the mode of distributing the virtual management of electricity generation concentration, but make full use of direct current dynamic characteristic carries out dynamic output, removes all converter control links from.

4. The utility model discloses can carry out effective linkage with the energy storage battery of energy storage microgrid, realize "initiative increase-volume"; the grid-connected system can be linked with a power distribution network (including a power generation network) in the grid-connected process, so that the power output is stabilized within a limited time, and the problems of second-level response and light abandonment of power grid dispatching are solved.

5. Through the utility model discloses a power limit module can directly carry out the power restriction, effectively improves output, promotes conversion efficiency and system security nature.

Drawings

The following drawings are included to provide a further understanding of the invention, are incorporated in and constitute a part of this application, and are provided for illustrative purposes only and are not intended to limit the scope of the invention. In the drawings:

fig. 1 is an electrical schematic diagram of a photovoltaic power generation unit in a first embodiment of the present application;

fig. 2 is a schematic flow chart of a photovoltaic power generation apparatus supporting an arrayed application according to a second embodiment of the present application;

fig. 3 is a schematic diagram of an application model of a photovoltaic power generation device supporting an arrayed application in an embodiment of the present application.

Reference numerals:

100. a photovoltaic power generation unit; 101. a photovoltaic panel body; 104. a conveying module; 106. a direct current voltage conversion module; 107. A power limiting module; 108. a control module; 109. an acquisition module; 111. a first acquisition line; 112. a second acquisition line; 120. a direct current bus bar; 300. storing and distributing the microgrid; 301. an energy storage module; 302. a current transformation module; 401. A distribution transformer.

Detailed Description

The following embodiments of the present invention will be disclosed with reference to the drawings, and will be described in detail, and a part of the drawings constituting the present application is provided to further understand the present invention, and the exemplary embodiments and descriptions of the present invention are provided to explain the present invention, and do not constitute the improper limitation of the present invention, and all other embodiments obtained by the ordinary skilled person without creative labor in the field belong to the protection scope of the present invention.

It should be noted that, unless the directions indicated are individually defined, the directions of up, down, left, right, transverse, vertical, etc. referred to herein are the directions of up, down, left, right, transverse, vertical, etc. as shown in fig. 1 of the embodiment of the present application, and if the specific posture is changed, the directional indication is changed accordingly. The terms "plurality" and "a plurality" mean two or more, and when used in conjunction herein, the terms "first," "second," "third," "fourth," "I," "II," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Further, in the various embodiments of the present disclosure, the same or similar reference numerals denote the same or similar components.

In the present invention, the terms "connected" and "fixed" are to be understood broadly, unless otherwise specifically defined and limited, for example, "fixed" may be fixedly connected, detachably connected, or integrated, unless otherwise specifically defined. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory to each other or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the scope of the present invention.

Example one

The embodiment provides a photovoltaic power generation device supporting array application, which comprises a plurality of photovoltaic power generation units 100 and a mounting rack, wherein the photovoltaic power generation units 100 are arranged on the mounting rack in a matrix manner; as shown in fig. 1, the photovoltaic power generation unit 100 in this embodiment includes a photovoltaic panel body 101 and a transmission module 104, the photovoltaic panel body 101 generates a direct current, the direct current with a constant voltage is formed by the transmission module 104, and then dynamically converges on the direct current busbar 120, and is input into the storage and distribution microgrid 300, and finally is used by itself or is incorporated into a distribution grid for output.

The electricity generated by the photovoltaic power generation unit 100 through the transmission module in the technical scheme of the embodiment is the constant-voltage direct current, and can be effectively merged into the storage and distribution network, the energy storage station is directly connected into the direct current network, no other conversion is performed, the conversion efficiency is improved, and a multi-source balance state is formed; the shunt and confluence characteristics of direct current are fully utilized, dynamic power energy storage hybrid motion is implemented, and each energy is effectively excavated; the integrated energy storage battery system has stronger channel overcurrent capacity and convergence capacity than a traditional integrated energy storage battery system, can bear repeated high-frequency random charge and discharge, has dynamic self-repairing capacity in the process, and has a service life enough to support the service life requirement of an electric power system. Moreover, standardized photovoltaic power generation unit 100 matrix is arranged and is installed on the mounting bracket, and construction cost is controllable, and can realize standardized, extensive batch production, effectively reduces production construction cost, and the utilization ratio of the light-facing area is far higher than traditional centralized wind power plant's utilization ratio, effectively improves the utilization ratio of electric energy, installation economy.

As shown in fig. 1, as a specific implementation manner, the transmission module 104 in this embodiment includes a dc-to-dc voltage conversion module 106 and a power limiting module 107, and the power limiting module 107 performs power limiting. It should be noted that the DC voltage converting module 106 in this embodiment is a DC/DC power converter, where DC is short for Direct Current, that is, Direct Current; the principle of the DC-DC power converter is that elements such as an inductor and a capacitor are used as energy storage elements to complete a voltage conversion function, and the DC-DC power converter mainly aims at efficiently realizing voltage conversion and stable output. The power limiting module 107 is a power diode, so that when the constant voltage direct current after voltage conversion and stable output are realized by the direct current voltage conversion module 106 in a forward conduction state, the work of larger current can be completed through larger current, the upper limit of the generator is not exceeded, the conversion efficiency and the safety of the system are improved, the direct current voltage conversion module can be effectively incorporated into a storage and distribution network, the shunting and converging characteristics of the direct current are fully utilized, dynamic power energy storage hybrid is implemented, each energy source is effectively excavated, and the problem of light abandonment is further solved.

As shown in fig. 2, as a specific implementation manner, a control module 108 is connected in parallel between two ends of the dc voltage converting module 106 in this embodiment; furthermore, the control module 108 in this embodiment is provided with an acquisition module 109, wherein the acquisition module 109 acquires the dc voltage and the current information at the front end of the dc-to-dc voltage conversion module 106 through a first acquisition channel 111 and/or acquires an externally input communication command through a second acquisition channel 112.

As a specific implementation manner, the mounting frame in this embodiment includes a building base and a connecting frame arranged on the building base, and the photovoltaic panel bodies 101 are uniformly distributed on the connecting frame. Further, the connecting frame comprises a transverse pipe assembly and a vertical pipe assembly, and the transverse pipe assembly and the vertical pipe assembly are regularly connected. The matrix type photovoltaic power generation field is built by using a common steel structure, the construction cost is controllable, and no particularly strict foundation requirement exists; photovoltaic board body 101 evenly distributed sets up on the link, and the light facing area high-usage.

Example two

Different from the first embodiment, as shown in fig. 2 and fig. 3, the present embodiment explains a connection process with the storage and distribution microgrid and the distribution grid on the basis of the first embodiment. The power generation units 100 are arranged in a matrix, constant-voltage direct current output by each transmission module is converged on the direct current busbar 120 and then transmitted to the storage and distribution microgrid 300, so that electric energy of the storage and distribution microgrid is stored in an energy storage module 301, the energy storage module is preferably an energy storage lithium battery, the energy storage module 301 converts the direct current into alternating current through an inverter module 302, and the alternating current is transmitted out through a distribution transformer 401 of a power distribution network. The core principle is that the array photovoltaic power generation unit is directly connected with other direct current power generation sources in parallel to realize intelligent double-source or multi-source output, and the EMS intelligent scheduling is matched with the whole network scheduling. The system has the greatest characteristic of simplifying the process, fully utilizes the self characteristics of direct current to construct an adaptive balance system, stably outputs various random power supplies through intelligent integration, solves the worldwide control problem of the random power supplies on-grid and off-grid in grid-connected engineering, and changes a second-level response mechanism with high cost and control difficulty into an hour-level, predictable and schedulable high-quality mechanism through direct current source grid networking.

As shown in fig. 3, the energy storage array formed by combining a plurality of energy storage modules in this embodiment improves the reliability of power supply, and a plurality of photovoltaic power generation unit arrays and other power generation sources may be added in the storage and distribution microgrid; the distributed power generation source layout is supported, and the direct current busbar is converged and effectively linked with the energy storage battery, so that active capacity increase is realized; the non-uniform output of the distributed power supply is stabilized by corresponding energy reserve adjustments. The energy storage array system of the reserve micro-grid is used as an emergency standby power supply in the micro-network, and the power requirement meets the requirement of load power supply as far as possible; when the storage and distribution micro-grid is connected to the main grid of the power distribution network, the energy storage array system is adjusted according to the off-grid and on-grid modes, so that the reliability of load power supply as much as possible is met to the maximum extent. The PCS array energy storage converter device can control the charging and discharging processes of the energy storage battery, carry out AC/DC conversion and directly supply power to an AC load under the condition of no power grid. And controlling the converter to charge or discharge the battery according to the symbol and the size of the power instruction, so as to realize the regulation of the active power and the reactive power of the power grid. Moreover, the method is not influenced by the change of natural illumination conditions, and the problem that the power generation is difficult to be integrated into a large network due to instability and randomness of power generation is solved. The system can be linked with a power distribution network (including a power generation network) in the grid connection process, so that the power output is stabilized within a limited time, and the problem of second-level response of power grid scheduling is solved.

In summary, the electricity generated by the power generation unit through the conveying module is the direct current with the constant voltage, and can be effectively merged into a storage and distribution network or a power generation and storage network without any other conversion, so that the conversion efficiency is improved; the shunt and confluence characteristics of direct current are fully utilized, dynamic power energy storage hybrid motion is implemented, and each energy is effectively excavated. Moreover, standardized electricity generation unit matrix is arranged and is installed on the mounting bracket, and construction cost is controllable, and can realize standardized, extensive batch production, effectively reduces production construction cost, and the light facing area utilization ratio is far higher than traditional centralized photovoltaic power plant's utilization ratio, effectively improves the utilization ratio of electric energy, installation economic nature. Thereby solving the problems of high production and construction cost, low utilization rate and resource waste in the prior art.

While the above description shows and describes the preferred embodiments of the application, it is to be understood, as noted above, that the application is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the subject matter disclosed above, as determined by the teachings or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims

1. A photovoltaic power generation device supporting array application comprises a plurality of photovoltaic power generation units and a mounting rack,

the photovoltaic power generation units are arranged and installed on the installation rack in a matrix manner;

the photovoltaic power generation unit comprises a photovoltaic panel body and a conveying module, wherein direct current generated by the photovoltaic panel body passes through the conveying module to form constant-voltage direct current, and then the constant-voltage direct current is dynamically converged on a direct current busbar, and the direct current busbar is connected with the storage and distribution micro grid.

2. The photovoltaic power generation device supporting arrayed applications of claim 1, wherein the delivery module comprises a dc-to-dc voltage conversion module and a power limiting module, and the power limiting module is used for limiting power.

3. The photovoltaic power generation device supporting the arrayed application of claim 2, wherein the control module is connected in parallel between two ends of the direct current voltage conversion module.

4. The photovoltaic power generation device supporting the arrayed application of claim 3, wherein the control module is provided with an acquisition module.

5. The photovoltaic power generation device supporting the arrayed application of claim 4, wherein the acquisition module acquires information of direct current voltage and current at the front end of the voltage conversion module.

6. The photovoltaic power generation device supporting arrayed applications of claim 4, wherein the collection module collects the input communication command.

7. The photovoltaic power generation device supporting arrayed applications of claim 2, wherein the power limiting module is a power diode.

8. The photovoltaic power generation device supporting the arrayed application of claim 2, wherein the direct current to voltage conversion module is a DC/DC power converter.

9. The photovoltaic power generation device supporting the arrayed application of claim 1, wherein the mounting frame comprises a building base and a connecting frame arranged on the building base, and the photovoltaic power generation units are uniformly distributed on the connecting frame.

10. The photovoltaic power generation device supporting arrayed applications of claim 9, wherein the connecting frame comprises a horizontal pipe assembly and a vertical pipe assembly, and the horizontal pipe assembly and the vertical pipe assembly are regularly connected.