CN220107289U - Distributed photovoltaic alternating-current low-voltage grid-connected chassis - Google Patents

Abstract

The utility model relates to the field of relay protection, in particular to a distributed photovoltaic alternating current low-voltage grid-connected chassis, which comprises a chassis body and is characterized in that a first box door and a second box door are arranged on the outer side of the chassis body, and the first box door is arranged above the second box door; a plurality of groups of transverse brackets, vertical brackets and longitudinal brackets are detachably arranged in the box body; an electric energy meter, a guillotine type isolating switch, a main frame circuit breaker, an automatic reclosing switch and an anti-islanding controller are sequentially fixed above the longitudinal support, and the case can adapt to the heights of different electrical equipment and fix the electrical equipment on the inner side of the case body.

Description

Distributed photovoltaic alternating-current low-voltage grid-connected chassis

Technical Field

The utility model relates to the field of relay protection, in particular to a distributed photovoltaic alternating current low-voltage grid-connected chassis.

Background

With the continuous advancement of environmental protection policies in China, research on distributed photovoltaic power generation is also an important subject in the electrical field, distributed power generation is used as a scattered power generation mode, energy is saved, a plurality of problems are generated along with the distributed power generation, electric safety problems cannot be treated in a centralized manner, more electric power equipment is required to transmit electric energy into a power distribution network and protect electric power lines, and the problems of installation, transportation and protection of the equipment are also important to solve.

Disclosure of Invention

Aiming at the problems that electric power protection equipment needs to be installed, transported and protected, the utility model provides a distributed photovoltaic alternating current low-voltage grid-connected chassis.

In order to achieve the above purpose, the present utility model is realized by the following technical scheme:

the embodiment of the utility model discloses a distributed photovoltaic alternating current low-voltage grid-connected chassis, which comprises a chassis body and is characterized in that a first box door and a second box door are arranged on the outer side of the chassis body, and the first box door is arranged above the second box door; a plurality of groups of transverse brackets, vertical brackets and longitudinal brackets are detachably arranged in the box body; an electric energy meter, a guillotine type isolating switch, a main frame circuit breaker, an automatic reclosing switch and an anti-islanding controller are sequentially fixed above the longitudinal support.

Optionally, a plurality of groups of first through holes are formed above the transverse support, a plurality of groups of second through holes are formed above the vertical support, a plurality of groups of third through holes are formed above the longitudinal support, a group of first through holes above the transverse support and a group of second through holes above the vertical support are mutually overlapped and then penetrate through the first through holes and the second through holes through screws for fixing; the group of third through holes above the longitudinal support and the group of first through holes above the transverse support are mutually overlapped and then penetrate through the first through holes and the third through holes by screws for fixing.

Optionally, the electric energy meter, the guillotine type isolating switch, the main frame circuit breaker, the automatic reclosing switch and the anti-islanding controller are fixed above the longitudinal bracket by a fixing frame.

Optionally, a circular through hole is formed above the second box door, and the tail end of the handle of the guillotine type isolating switch penetrates through the circular through hole.

Optionally, a plurality of groups of third through holes are formed in the upper portion of the box body, the third through holes are square, the upper portion of each third through hole is covered by a ventilation panel, and the ventilation panels are fixed above the box body by screws.

Optionally, a plurality of groups of fourth through holes are formed in the ventilation panel, and the fourth through holes are in a strip shape.

Optionally, the below of box is provided with the base, the base includes fixed block and bottom plate, the fixed block has two and fixes the both sides below the bottom plate, the bottom plate is fixed in the bottom of box.

The utility model has the beneficial effects that:

1. according to the utility model, the grid-connected chassis is internally provided with a plurality of groups of vertical supports, transverse supports and longitudinal supports, and the distances among the groups of supports can be adjusted and fixed, so that the grid-connected chassis can adapt to the heights and widths of different electrical equipment.

2. The ventilation panel is arranged above the grid-connected cabinet, so that the temperature can be reduced by ventilation with external air.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the box of the present utility model;

FIG. 2 is a schematic view of the internal frame structure of the present utility model;

fig. 3 is a front view of the present utility model.

In the figure: 1. a case; 2. a first door; 3. a second door; 4. a transverse bracket; 5. a vertical bracket; 6. a longitudinal support; 7. an electric energy meter; 8. a guillotine type isolating switch; 9. a main frame circuit breaker; 10. an automatic reclosing switch; 11. an anti-islanding monitor; 12. a ventilation panel; 13. and (5) a base.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As used in the present description and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The utility model provides a distributed photovoltaic alternating current low-voltage grid-connected chassis, which comprises a chassis body 1 and is characterized in that a first box door 2 and a second box door 3 are arranged on the outer side of the chassis body 1, and the first box door 2 is arranged above the second box door 3; a plurality of groups of transverse brackets 4, vertical brackets 5 and longitudinal brackets 6 are detachably arranged in the box body 1; an electric energy meter 7, a guillotine type isolating switch 8, a main frame circuit breaker 9, an automatic reclosing switch 10 and an anti-islanding controller are sequentially fixed above the longitudinal support 6.

Illustratively, the electric energy meter 7, the guillotine disconnecting switch 8, the main frame circuit breaker 9, the recloser switch 10 and the anti-islanding monitor 11 are all in the prior art, and are not limited herein, and these electric devices are disposed between the distributed power source and the main network to control the on/off of the power supply between the distributed power source and the main network.

Example 1: the grid-connected chassis is different from other chassis devices, the anti-islanding monitor 11 is arranged inside the chassis, and the anti-islanding monitor 11 is electrically connected with the automatic reclosing switch 10. The anti-islanding monitor 11 can detect whether the main network is connected with voltage or not, so that signals are sent to the automatic reclosing switch 10, and the automatic reclosing switch 10 realizes the on-off of the distributed power supply and the main network.

A plurality of groups of first through holes are formed above the transverse support 4, a plurality of groups of second through holes are formed above the vertical support 5, a plurality of groups of third through holes are formed above the longitudinal support 6, a group of first through holes above the transverse support 4 and a group of second through holes above the vertical support 5 are mutually overlapped and then penetrate through the first through holes and the second through holes through screws for fixing; the third through holes above the longitudinal support 6 and the first through holes above the transverse support 4 are overlapped with each other and then fixed by penetrating the first through holes and the third through holes through screws.

The above-mentioned transverse bracket 4, vertical bracket 5 and longitudinal bracket 6 are used as the architecture of fixed electrical equipment, and are arranged on the inner side of the chassis, a plurality of through holes are arranged above each bracket, and the brackets are fixed by passing through the through holes through screws, so that the distance between the transverse, vertical and longitudinal brackets 6 can be adjusted only by connecting different through holes between the fixed brackets, thereby adapting to the height and width of different equipment.

The electric energy meter 7, the guillotine disconnecting switch 8, the main frame breaker 9, the automatic reclosing switch 10 and the anti-islanding controller are fixed above the longitudinal bracket 6 by a fixing frame.

Illustratively, the case transverse support 4 and the vertical support 5 are arranged on the inner side wall of the case body 1, the longitudinal supports 6 are arranged between the transverse supports 4, the vertical supports 5 mainly play a role in fixing the transverse supports 4, the transverse supports 4 fix the longitudinal supports 6, and electric equipment is fixed above the longitudinal supports 6.

A circular through hole is formed above the second box door 3, and the tail end of the handle of the guillotine type isolating switch 8 penetrates through the circular through hole.

Illustratively, a guillotine type isolating switch 8 is arranged in the grid-connected chassis and is arranged on the outer side of the box body 1, so that manual operation can be realized, and the switch can be opened and closed.

A plurality of groups of third through holes are formed in the upper portion of the box body 1, the third through holes are square, the upper portion of each third through hole is covered by the ventilation panel 12, and the ventilation panels 12 are fixed above the box body 1 by screws.

The ventilation panel 12 is provided with a plurality of groups of fourth through holes, and the fourth through holes are in a strip shape.

For example, since the inside of the case 1 is mostly charged, heat is generated during long-term use, and in order to prevent damage to the electrical equipment caused by the heat, through-hole air holes are required to radiate the heat.

The below of box 1 is provided with base 13, and base 13 includes fixed block and bottom plate, and the fixed block has two and fixes the both sides below the bottom plate, and the bottom plate is fixed in the bottom of box 1.

Example 2: the distributed photovoltaic alternating-current low-voltage grid-connected chassis is connected with photovoltaic equipment, direct current of the photovoltaic equipment is converted into alternating current through an inverter, the inverter is connected with a lower terminal of an automatic reclosing switch 10, an upper terminal of the automatic reclosing switch 10 is converged and then enters a lower terminal of a guillotine type isolating switch 8, an upper terminal of the guillotine type isolating switch is connected with a low-voltage power grid, an anti-islanding monitoring device can detect voltage of a main grid, when the voltage of the main grid exceeds a threshold value, a control signal is sent to the automatic reclosing switch 10 to be connected with the main grid, when the voltage of the main grid is lower than the threshold value, the control signal is sent to the automatic reclosing switch 10, and the automatic reclosing switch 10 is disconnected with the main grid.

The device elements in the above embodiments are conventional device elements unless otherwise specified, and the connection and control methods are conventional connection and control methods unless otherwise specified.

While the utility model has been described with reference to the embodiments, those skilled in the art will understand that various specific parameters in the above embodiments may be changed without departing from the spirit of the utility model, and thus a plurality of specific embodiments are common variation ranges of the utility model, and will not be described in detail herein.

Claims (8)

1. The distributed photovoltaic alternating current low-voltage grid-connected chassis comprises a chassis body and is characterized in that a first box door and a second box door are arranged on the outer side of the chassis body, and the first box door is arranged above the second box door; a plurality of groups of transverse brackets, vertical brackets and longitudinal brackets are detachably arranged in the box body; an electric energy meter, a guillotine type isolating switch, a main frame circuit breaker, an automatic reclosing switch and an anti-islanding controller are sequentially fixed above the longitudinal support.

2. The grid-connected chassis according to claim 1, wherein a plurality of groups of first through holes are formed above the transverse support, a plurality of groups of second through holes are formed above the vertical support, a plurality of groups of third through holes are formed above the longitudinal support, and a group of first through holes above the transverse support and a group of second through holes above the vertical support are mutually overlapped and then are fixed through the first through holes and the second through holes by screws; the group of third through holes above the longitudinal support and the group of first through holes above the transverse support are mutually overlapped and then penetrate through the first through holes and the third through holes by screws for fixing.

3. The grid-tie chassis of claim 1, wherein the lateral brackets and the vertical brackets are disposed inside the side walls of the cabinet, and the longitudinal brackets are disposed between the lateral brackets.

4. The grid-tie chassis of claim 1, wherein the electrical energy meter, guillotine disconnector, main frame circuit breaker, recloser switch, and anti-islanding controller are secured above the longitudinal support by a mount.

5. The grid-tie chassis of claim 1, wherein a circular through hole is formed above the second door, and a handle end of the guillotine isolator extends through the circular through hole.

6. The grid-connected chassis of claim 1, wherein a plurality of groups of third through holes are formed in the upper portion of the box body, the third through holes are square, the upper portion of the third through holes is covered by a ventilation panel, and the ventilation panel is fixed above the box body by screws.

7. The grid-tie chassis of claim 6, wherein the ventilation panel has a plurality of groups of fourth through holes, and the fourth through holes are elongated.

8. The grid-connected chassis according to claim 1, wherein a base is provided below the chassis, the base includes two fixing blocks and a bottom plate, the fixing blocks are fixed on two sides below the bottom plate, and the bottom plate is fixed on the bottom of the chassis.