CN217427363U

CN217427363U - Low-voltage cabinet and photovoltaic power plant

Info

Publication number: CN217427363U
Application number: CN202220275680.8U
Authority: CN
Inventors: 潘韩飞; 张献伟; 朱其姚; 吴万生
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-09-13
Anticipated expiration: 2032-02-10

Abstract

The utility model discloses a low-voltage cabinet and photovoltaic power plant, including the cabinet body with set up in the operating window of the cabinet body, operating window is including setting up in the positive front operating window of the cabinet body and setting up in the side operating window of one of them side of the left and right sides face of the cabinet body, and positive operating window is provided with open closed's front door plant, and side operating window is provided with open closed's side door plant. This low-voltage cabinet, in the practical application in-process, through designing into front operation window and side operation window two parts with the operation window for the device that the operation window need appear can be arranged in the front and the side of the cabinet body, compares in traditional operation window and only arranges in the front of the cabinet body, greatly reduced the positive arrangement pressure of the cabinet body, reduced the front design area of the cabinet body, the structure is compacter, space utilization is higher, helps reducing low-voltage cabinet's whole volume.

Description

Low-voltage cabinet and photovoltaic power plant

Technical Field

The utility model relates to an electrical cabinet technical field, more specifically say, relate to a low-voltage cabinet and photovoltaic power plant.

Background

In order to facilitate installation, maintenance and operation of the low-voltage cabinet, an operation window needs to be configured on the cabinet body of the low-voltage cabinet, most of components in the low-voltage cabinet are displayed on the operation window, and an operator can perform installation, maintenance and various operations through the operation window.

The operating window of present low-voltage cabinet generally arranges in the front of the cabinet body of low-voltage cabinet, realizes operating window's switching through setting up open closed front door plant in the front, and for satisfying installation, maintenance and various operations, more device need present in operating window, consequently, in order to satisfy operating window's the demand that presents, the front area of low-voltage cabinet is generally designed great, finally leads to the whole volume of low-voltage cabinet great relatively.

In summary, how to solve the problem of the large overall volume of the low-voltage cabinet becomes a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a low-voltage cabinet and photovoltaic power plant to solve the great problem of the whole volume of low-voltage cabinet.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a low-voltage cabinet, include the cabinet body with set up in the operation window of the cabinet body, operation window including set up in the positive front operation window of the cabinet body with set up in the side operation window of one of them side of the left and right sides face of the cabinet body, positive operation window is provided with open closed front door plant, side operation window is provided with open closed side door plant.

Optionally, the front operation window includes a first front operation area and a second front operation area which are distributed left and right on the front of the cabinet body; one of the first front operation area and the second front operation area is used for arranging auxiliary devices for power distribution and human-computer interaction, and the other one of the first front operation area and the second front operation area is used for arranging a bus bar and a core device connected with the bus bar.

Optionally, the auxiliary device comprises at least one of a metering electric meter, a breaking operation switch, a lightning protection module, a distribution fuse and a terminal block.

Optionally, one of the first front operation region and the second front operation region, which is close to the side operation window, is an arrangement region of the auxiliary device.

Optionally, the core device includes a frame on-off component connected to the bus bar, at least some branch circuits among the plurality of branch circuits connected to the bus bar, and a branch on-off component disposed in the branch circuits, the frame on-off component is used for wholly turning on and off the whole branch circuits, the branch on-off component includes an isolation switch and a fuse, the isolation switch is used for controlling on and off of the branch circuits, and the fuse is used for protecting the branch circuits from power failure.

Optionally, the frame switching assembly is a frame circuit breaker or a frame disconnector.

Optionally, the frame on-off assembly and the branch on-off assembly are arranged in sequence from top to bottom.

Optionally, the core device further includes a micro switch located between the frame on-off assembly and the branch on-off assembly, and an uninterruptible power supply located on the left side or the right side of the frame on-off assembly.

Optionally, the side operation window includes a first side operation area and a second side operation area which are sequentially arranged on the side of the cabinet body from top to bottom; one of the first side operation area and the second side operation area is used for arranging communication devices, and the other one of the first side operation area and the second side operation area is used for arranging a part of branch circuits in a plurality of branch circuits connected with the bus bar and a branch on-off assembly arranged on the branch circuits.

Optionally, the communication device is disposed in the first side operating area, and a part of the branch circuit and the branch on-off assembly are disposed in the second side operating area; the branch on-off assembly is located in the middle of the side operation window.

Optionally, the communication device includes at least one of five devices, namely a box transformer substation measurement and control device, a PLC module, an SCU module, a switch, and an optical fiber terminal box.

Optionally, a heat dissipation system is arranged on one side, away from the side operation window, of the cabinet body.

Optionally, the heat dissipation system includes at least one fan disposed on an outer wall of the cabinet and a fan cover covering an outer side of the fan, an air inlet is formed on the fan cover, a vent is formed at a position of the outer wall of the cabinet corresponding to the position where the fan is mounted, and an air outlet is disposed at a bottom of the cabinet.

Optionally, a wind screen for extending the wind path is further disposed on the inner wall of the cabinet body below the vent.

Compared with the introduction content of the background technology, the low-voltage cabinet comprises a cabinet body and an operation window arranged on the cabinet body, wherein the operation window comprises a front operation window arranged on the front side of the cabinet body and a side operation window arranged on one side face of the left side face and the right side face of the cabinet body, the front operation window is provided with an openable front door plate, and the side operation window is provided with an openable side door plate. This low-voltage cabinet, in the practical application in-process, through designing into front operation window and side operation window two parts with the operation window for the device that the operation window need appear can be arranged in the front and the side of the cabinet body, compares in traditional operation window and only arranges in the front of the cabinet body, greatly reduced the positive arrangement pressure of the cabinet body, reduced the front design area of the cabinet body, the structure is compacter, space utilization is higher, helps reducing low-voltage cabinet's whole volume.

Additionally, the utility model also provides a photovoltaic power plant, including the low-voltage cabinet, the low-voltage cabinet that the low-voltage cabinet described for aforementioned arbitrary scheme. Because above-mentioned low-voltage cabinet has aforementioned technological effect, consequently the photovoltaic power plant that has this low-voltage cabinet also should have corresponding technological effect, and no longer give unnecessary details here.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a low voltage cabinet provided by an embodiment of the present invention without a front door panel;

fig. 2 is a schematic structural view of the low voltage cabinet provided in the embodiment of the present invention without a side door panel;

fig. 3 is a schematic view of an internal top-down structure of a low voltage cabinet according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a bottom view angle of the low voltage cabinet according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a heat dissipation system according to an embodiment of the present invention (arrows continuously arranged in the figure represent airflow directions).

Wherein, in fig. 1-5:

the intelligent cabinet comprises a cabinet body 1, a front door panel 11, a side door panel 12, a front operation window 13, a first front operation area 13a, a second front operation area 13b, a side operation window 14, an air outlet 15, a wind shield 16, an auxiliary transformer 2, an auxiliary device 3, a metering ammeter 31, a breaking operation switch 32, a lightning protection module 33, a terminal row 34, a core device 4, a frame on-off component 41, a micro switch 43, an uninterruptible power supply 44, a branch on-off component 5, an isolating switch 51, a fuse 52, a box transformer measurement and control 61, a PLC module 62, an SCU module 63, a switch 64, an optical fiber terminal box 65, a fan 71, a fan cover 72 and an air inlet 72 a.

Detailed Description

The core of the utility model lies in providing a low-voltage cabinet and photovoltaic power plant to solve the great problem of the whole volume of low-voltage cabinet.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, an embodiment of the present invention provides a low voltage cabinet, which includes a cabinet body 1 and an operation window disposed on the cabinet body 1, wherein the operation window includes a front operation window 13 disposed on the front side of the cabinet body 1 and a side operation window 14 disposed on one side of the left and right sides of the cabinet body 1, the front operation window 13 is provided with an openable front door panel 11, and the side operation window 14 is provided with an openable side door panel 12.

This low-voltage cabinet, in the practical application in-process, through designing into front operation window and side operation window two parts with the operation window for the device that the operation window need appear can be arranged in the front and the side of the cabinet body, compares in traditional operation window and only arranges in the front of the cabinet body, greatly reduced the positive arrangement pressure of the cabinet body, reduced the positive design area of the cabinet body, the structure is compacter, space utilization is higher, helps reducing the whole volume of low-voltage cabinet.

It should be noted that the side operating window 14 and the corresponding side door panel 12 may be specifically disposed on the left side of the cabinet, or may be disposed on the right side of the cabinet, and in an actual application process, the configuration may be selected according to actual requirements.

In some specific embodiments, the front operation window 13 may specifically include a first front operation area 13a and a second front operation area 13b distributed left and right on the front surface of the cabinet 1; one of the first front surface operation area 13a and the second front surface operation area 13b is used for arranging the auxiliary devices 3 for power distribution and man-machine interaction, and the other is used for arranging the bus bar and the core device 4 connected with the bus bar. It should be noted that the bus bar and the back of the front operation area of the core device 4 correspondingly arranged in the cabinet 1 may be arranged with the auxiliary transformer 2 for power distribution. The primary side of the auxiliary transformer 2 is connected with the bus bar to obtain electricity from the bus bar, the secondary side of the auxiliary transformer is connected with a related micro-disconnection switch for power distribution, and the electricity of related devices in the low-voltage cabinet and the electricity of related equipment in a power station field can be connected with the micro-disconnection switch.

The auxiliary device 3 may specifically include at least one of a metering meter 31, an open-circuit switch 32 for facilitating operation during power distribution maintenance, a lightning protection module 33, a power distribution fuse, and a terminal block 34 for field wiring. It is understood that other devices may be included when other functions are required, and the examples are not repeated here.

In some specific embodiments, one of the first front operation region 13a and the second front operation region 13b near the side operation window 14 is an arrangement region of the auxiliary device 3. By this arrangement, more space can be made available for the lateral operating window 14, since there is generally more space behind the auxiliary device 3.

It should be noted that the core device 4 may mainly include a frame on-off assembly 41 connected to the bus bar, at least a part of branch circuits in the plurality of branch circuits connected to the bus bar, and a branch on-off assembly 5 disposed in the branch circuits; the frame on-off assembly 41 is used for on-off of all branch circuits integrally, the branch on-off assembly 5 comprises an isolating switch 51 and a fuse 52, the isolating switch 51 is used for controlling on-off of the branch circuits, and the fuse 52 is used for power-off protection of the branch circuits. By designing the branch on-off assembly 5, when a certain branch loop is maintained, only the isolating switch 51 on the branch loop is needed to be disconnected, all branch loops are not needed to be disconnected, and the normal operation of other branch loops is ensured, so that the maintenance cost can be reduced; in addition, when a certain branch circuit breaks down and needs to be subjected to power-off protection, the fuse 52 can be automatically fused to complete the power-off protection, and compared with the traditional circuit breaker, the power-off protection is carried out, so that the phenomenon that the input end and the output end can generate arc spraying is avoided. Because the arc spraying is molten charged metal particles, interphase short circuit or relative short circuit arc discharge is easily caused, and then the hidden trouble of larger fault is caused.

It should be noted that the frame on-off component 41 may specifically be a frame circuit breaker, and may also be a frame disconnector, and in an actual application process, the configuration may be selected according to an actual requirement, which is not limited in more detail herein.

In some specific embodiments, the frame switching assembly 41 and the branch switching assembly 5 may be designed to be sequentially arranged from top to bottom, and the structural form is designed to be more favorable for space utilization, and it is understood that in the practical application process, other arrangement manners may be selected according to specific requirements, and are not limited in more detail herein.

In a further embodiment, the core device may further include a micro switch 43 and a socket located between the frame on-off assembly 41 and the branch on-off assembly 5, and the micro switch 43 and the socket are arranged, so that a user can conveniently perform a conventional power distribution operation on the site. In addition, the core device may further include an uninterruptible power supply 44, and the uninterruptible power supply 44 may be specifically disposed on the left side or the right side of the frame on-off assembly 41, and may be selectively disposed according to actual requirements in an actual application process.

In some more specific embodiments, the side operation window 14 may specifically include a first side operation area and a second side operation area arranged in sequence from top to bottom on the side of the cabinet; one of the first side surface operation area and the second side surface operation area is used for arranging communication devices, and the other one of the first side surface operation area and the second side surface operation area is used for arranging a part of branch circuits in a plurality of branch circuits connected with the bus bar and a branch on-off assembly 5 arranged on the branch circuits; the branch circuit breaker assembly 5 comprises an isolating switch 51 and a fuse 52, wherein the isolating switch 51 is used for controlling the on-off of the branch circuit, and the fuse 52 is used for protecting the branch circuit from power failure. By arranging the branch on-off assembly 5 on the branch circuits, when a certain branch circuit needs to be maintained, only the isolating switch 51 of the branch circuit needs to be disconnected, so that the normal operation of other branch circuits is ensured, and the maintenance cost can be reduced; meanwhile, when a certain branch circuit fails and needs power-off protection, the fuse 52 can be automatically disconnected for protection, and arc spraying at the input end and the output end caused by the power-off protection of the traditional circuit breaker can be avoided. Because the arc spraying is molten charged metal particles, interphase short circuit or relative short circuit arc discharge is easily caused, and then the hidden trouble of larger fault is caused.

In a further embodiment, the communication device may be specifically disposed in a first side operation area, and a part of the branch circuit and the branch on-off assembly 5 is disposed in a second side operation area; and the bypass opening/closing member 5 is preferably designed to be located at a middle position of the side operation window 14. The design at the above position is more convenient for the user to operate, and certainly, in the practical application process, the display device can be arranged at other positions according to the requirements of the user and the design requirements, which is not limited in more detail herein.

It should be noted that the communication device may specifically include at least one of the five devices, i.e., the box transformer substation measurement and control 61, the PLC module 62, the SCU module 63, the switch 64, and the fiber terminal box 65. It should be understood that the above is only an example of the communication device according to the embodiments of the present invention, and in the practical application process, when there are other functional requirements, other corresponding devices may also be configured, which is not illustrated herein.

In some specific embodiments, the side of the cabinet 1 away from the side operation window 14 may be further provided with a heat dissipation system. Through arranging the heat dissipation system, the heat dissipation requirement of the internal components of the low-voltage cabinet can be met.

In a further embodiment, the heat dissipation system may specifically include at least one fan 71 disposed on an outer wall of the cabinet 1 and a fan cover 72 covering an outer side of the fan 71, where the fan cover 72 may specifically be fixed on the outer wall, and the fixing manner is not limited, and may be fixing by a fastener or welding; an air inlet 72a is formed on the fan cover 72, a closed chamber can be formed on the housing of the fan cover 72 except for an opening of the air inlet 72a and a vent at a position on the housing wall corresponding to a position where the fan is installed, a vent is formed on the housing wall of the cabinet body 1 corresponding to a position where the fan 71 is installed, an air outlet 15 is further arranged at the bottom of the cabinet body 1 except for a cable closing plate for incoming wires, and the air outlet 72a is preferably designed at the bottom of the auxiliary transformer 2, so that heat dissipation of the auxiliary transformer can be enhanced. In the actual working process, the fan 71 runs, and external fresh air can enter through the air inlet 72a and enter the cabinet body 1 through the ventilation opening by the guiding of the fan cover 72, so that heat exchange is performed on components inside the cabinet body 1, and finally the fresh air is discharged from the air outlet 15 designed at the bottom of the cabinet body 1.

It should be noted that, in general, in order to prevent impurities from entering the fan guard 72, a filter device such as a filter screen is further disposed at the air inlet 72a of the fan guard 72; in order to prevent rainwater and the like from entering the fan guard 72, the air inlet 72a is preferably provided at a lower portion of the fan guard 72.

In addition, the number of the fans 71 may be configured according to the heat dissipation requirement inside the low voltage cabinet, for example, the fans may be designed to be two fans arranged in sequence from top to bottom, or one fan, or more than two fans.

In some more specific embodiments, a wind deflector 16 for extending the wind path is further disposed on the inner wall of the cabinet body 1 below the vent, and by designing the wind deflector 16, the flow path of the fan 71 blown to the inside of the cabinet body 1 can be effectively extended, so that the cold air flow can be ensured to pass through the internal area of the cabinet body in the largest path as much as possible, the heat dissipation blind area is avoided, and the heat dissipation efficiency is improved.

It should be noted that, in this specification, each embodiment is described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same as and similar to each other in each embodiment may be referred to.

It should be understood that the use of "system," "device," "unit," and/or "module" herein is merely one way to distinguish between different components, elements, components, parts, or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

If used in this application, the flowcharts are intended to illustrate operations performed by the system according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.

It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a low-voltage cabinet, including the cabinet body (1) with set up in the operation window of the cabinet body (1), its characterized in that, operation window including set up in positive front operation window (13) of the cabinet body (1) with set up in side operation window (14) of one of them side of the left and right sides face of the cabinet body (1), front operation window (13) are provided with openable front door plant (11), side operation window (14) are provided with openable side door plant (12).

2. The low-voltage cabinet according to claim 1, characterized in that the front operating window (13) comprises a first front operating area (13a) and a second front operating area (13b) distributed left and right on the front of the cabinet body (1); one of the first front operation area (13a) and the second front operation area (13b) is used for arranging auxiliary devices (3) for power distribution and man-machine interaction, and the other one is used for arranging a bus bar and a core device (4) connected with the bus bar.

3. The low-voltage cabinet according to claim 2, characterized in that the auxiliary device (3) comprises at least one of a metering meter (31), a breaking operation switch (32), a lightning protection module (33), a distribution fuse and a terminal block (34).

4. The low-voltage cabinet according to claim 2, characterized in that one of the first front operating area (13a) and the second front operating area (13b) close to the lateral operating window (14) is an area of arrangement of the auxiliary device (3).

5. The low-voltage cabinet according to claim 4, wherein the core device (4) comprises a frame switching assembly (41) connected with the bus bar, at least part of branch circuits in a plurality of branch circuits connected with the bus bar, and a branch switching assembly (5) arranged on the branch circuits, the frame switching assembly (41) is used for integrally switching all the branch circuits, the branch switching assembly (5) comprises an isolating switch (51) and a fuse (52), the isolating switch (51) is used for controlling the switching of the branch circuits, and the fuse (52) is used for protecting the branch circuits from power failure.

6. A low-voltage cabinet according to claim 5, characterized in that the frame switching assembly (41) is a frame circuit breaker or a frame disconnector.

7. The low-voltage cabinet according to claim 5, characterized in that the frame switching assembly (41) and the branch switching assembly (5) are arranged in sequence from top to bottom.

8. The low-voltage cabinet according to claim 7, characterized in that the core device further comprises a micro-switch (43) located between the frame switching assembly (41) and the branch switching assembly (5), and an uninterruptible power supply (44) located on the left or right side of the frame switching assembly (41).

9. The low-voltage cabinet according to claim 5, characterized in that the lateral operating window (14) comprises a first lateral operating zone and a second lateral operating zone arranged in sequence from top to bottom on the lateral surface of the cabinet body; one of the first side operation area and the second side operation area is used for arranging communication devices, and the other one of the first side operation area and the second side operation area is used for arranging a part of branch circuits in a plurality of branch circuits connected with the bus bar and a branch on-off assembly (5) arranged on the branch circuits.

10. The low-voltage cabinet according to claim 9, characterized in that the communication device is arranged in the first side operating area, and part of the branch circuit and the branch on-off assembly (5) are arranged in the second side operating area; the branch on-off assembly (5) is located in the middle of the side operation window (14).

11. The low-voltage cabinet according to claim 9, characterized in that the communication device comprises at least one of the five devices of a box-to-substation measurement and control (61), a PLC module (62), an SCU module (63), a switch (64) and a fiber optic terminal box (65).

12. The low-voltage cabinet according to any one of claims 1 to 11, characterized in that a side of the cabinet body (1) remote from the lateral operating window (14) is provided with a heat dissipation system.

13. The low-voltage cabinet according to claim 12, characterized in that the heat dissipation system comprises at least one fan (71) disposed on an outer wall of the cabinet body (1) and a fan cover (72) covering the outer side of the fan (71), an air inlet (72a) is formed on the fan cover (72), an air vent is formed on the outer wall of the cabinet body (1) corresponding to a position where the fan (71) is mounted, and an air outlet (15) is formed at the bottom of the cabinet body (1).

14. The low-voltage cabinet according to claim 13, characterized in that a wind screen (16) for extending the wind path is further arranged on the inner wall of the cabinet body (1) below the ventilation opening.

15. A photovoltaic power plant comprising a low-voltage cabinet, characterized in that the low-voltage cabinet is a low-voltage cabinet according to any one of claims 1 to 14.