CN210490483U - Protection device for grid connection of distributed power supply - Google Patents
Protection device for grid connection of distributed power supply Download PDFInfo
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- CN210490483U CN210490483U CN201921785948.7U CN201921785948U CN210490483U CN 210490483 U CN210490483 U CN 210490483U CN 201921785948 U CN201921785948 U CN 201921785948U CN 210490483 U CN210490483 U CN 210490483U
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- 239000002184 metal Substances 0.000 claims abstract description 26
- 239000012780 transparent material Substances 0.000 claims abstract description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 1
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Abstract
The utility model discloses a protection device for distributed generator is incorporated into power networks connects between a plurality of grid-connected power and low voltage distribution network. The protection device comprises a first connector, a circuit board, a second connector and a shell. The first connector comprises a plurality of metal pins for being electrically connected with an external socket so as to lead in electric power required to be connected to the grid. The circuit board comprises a plurality of fuses, a power indicator and a protection element, the circuit board is used for being electrically connected with the first connector, the first ends of the fuses are respectively electrically connected with a plurality of metal pins of the first connector one by one, the second ends of the fuses are electrically connected with the power indicator, and the other end of the power indicator is connected with the protection element. The second connector includes a plurality of metal clips for connecting to an external plug. The shell is made of transparent materials, and the first connector, the circuit board and the second connector are all arranged inside the shell. The protection device has a simple structure and is low in cost.
Description
Technical Field
The utility model belongs to protection device especially relates to a protection device that is used for distributed generator to be incorporated into power networks.
Background
Solar energy resources have the advantages of wide distribution, inexhaustible resources, environmental protection, no pollution and the like, and are valued all over the world today in the energy crisis, wherein solar photovoltaic power generation is an important utilization mode. The geographical range of China is wide, the solar photovoltaic power generation system has considerable solar energy resources, and is supported by incentive guidance of national policies and vigorous by national power grid companies, and the total quantity of photovoltaic power generation installed in China leaps the first in the world. In numerous photovoltaic power generation application occasions, the low-power distributed household photovoltaic power generation system has wide application prospect. The solar energy conversion can be realized by utilizing the roof and the wall surface of the household building, and the solar energy conversion system has the advantages of flexible layout, low investment threshold, quick income and effectiveness and the like.
However, the output voltage of the low-power distributed household photovoltaic power generation system may be unstable, and the output voltage may fluctuate during grid connection, which may damage the rear-end electric equipment, and even affect the operation and control of the power distribution network. The existing part of photovoltaic power generation systems can be provided with a protection circuit, but the cost is high, and the structure is complex. Therefore, how to protect the grid-connected access of the power distribution network line with low cost is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a protection device for distributed generator is incorporated into power networks, its incorporated into power networks that can solve the distribution network circuit inserts and protects.
The utility model provides a protection device for distributed power grid connection, which is connected between a plurality of grid-connected power supplies and a low-voltage distribution network, and comprises a first connector, a circuit board, a second connector and a shell; the first connector comprises a plurality of metal pins which are used for being electrically connected with an external socket so as to lead in electric power needing grid connection; the circuit board comprises a plurality of fuses, a power indicator and a protection element, the circuit board is used for being electrically connected with the first connector, the first ends of the fuses are respectively and electrically connected with a plurality of metal pins of the first connector one by one, the second ends of the fuses are electrically connected with the power indicator, and the other end of the power indicator is connected with the protection element; the second connector comprises a plurality of metal clamping pieces which are used for being connected with an external plug; the shell is made of transparent materials, and the first connector, the circuit board and the second connector are all arranged inside the shell.
Wherein, the protection component is a lightning arrester or a voltage suppressor.
Wherein the height of the first connector is approximately equal to the height of the metal pins.
Wherein the first connector is equivalent to the width of the circuit board.
Wherein the circuit board is as high as the second connector.
Wherein the fuses are resistive ceramic fuses.
In the protection device for grid connection of the distributed power supply, after any grid-connected alternating-current power supply sequentially passes through the protection device, the external socket and the external plug, namely the metal pins are inserted into the external socket, and the external plug is inserted into the metal clamping pieces of the second connector, so that the electric power of the external socket is transmitted to the circuit board of the protection device through the metal pins. When all the grid-connected alternating current power supplies are normal, the alternating current power supplies are transmitted to the metal clamping pieces through the circuit board after passing through the fuses, the power indicator lamps and the protection elements, and then the grid-connected power is transmitted to the external plug. The protection device has simple structure and lower cost.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a single line diagram of a preferred embodiment of a protection device for grid connection of distributed power supplies according to the present invention.
Fig. 2 is a schematic diagram of a preferred embodiment of the protection device for grid connection of distributed power supplies according to the present invention.
Fig. 3 is a partial schematic diagram of a preferred embodiment of the protection device for grid connection of the distributed power source in fig. 2.
Fig. 4 is another schematic diagram of the protection device for grid connection of the distributed power supply in fig. 2 according to the preferred embodiment.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1, a protection device 1 for a distributed power supply according to the present invention is connected between a plurality of grid-connected power supplies and a low voltage distribution network. The low-voltage distribution network is used for receiving a supply voltage V through a protection circuit. The low-voltage distribution network is connected to a load, wherein the maximum rated voltage of the load is greater than the supply voltage V. The protection device 1 is used for detecting the size of a grid-connected power supply, comparing the detected voltage value/current value of the grid-connected power supply with a preset threshold voltage/threshold current, and when the voltage value/current value of the grid-connected power supply is detected to be larger than the threshold voltage/threshold current, the protection device 1 is disconnected, so that the connection of a load can be disconnected, and the effect of protecting the load is achieved.
Please refer to fig. 2-4, which are schematic diagrams of a protection device 1 for a distributed power supply according to the present invention.
The preferred embodiment of the distributed power grid-connected protection device 1 comprises a first connector 11, a circuit board 12, a second connector 13 and a housing 14.
The first connector 11 includes a plurality of metal pins 111, and the metal pins 111 are electrically connected to an external socket 2 to input external ac power to the protection device 1. In this embodiment, the height of the first connector 11 is slightly larger than the height of the metal pins 111. The circuit board 12 is connected to the first connector 11, and the circuit board 12 includes a plurality of fuses 121, a power indicator 122 and a protection element 123. The first ends of the fuses 121 are respectively connected to the metal pins 111 of the first connector 11 in a one-to-one correspondence manner, the second ends of the fuses 121 are connected to the power indicator 122, and the other end of the power indicator 122 is connected to the protection element 123. In this embodiment, the protection element 123 may be a lightning arrester or a voltage suppressor.
The second connector 13 is electrically connected to the circuit board 12, the second connector 13 includes a plurality of metal clips 131, and the metal clips 131 are used for connecting with an external plug 3, so that the ac power can be transmitted to the external plug 3 after passing through the protection device 1.
In the protection device 1 of the present embodiment, after any grid-connected ac power source sequentially passes through the protection device 1, the external socket 2 and the external plug 3, that is, the metal pins 111 are plugged into the external socket 2, and the external plug 3 is plugged into the metal clips 131 of the second connector 13, so that the power of the external socket 2 is transmitted to the circuit board 12 of the protection device through the metal pins 111. When all the ac power supplies connected to the grid are normal, the ac power supplies are transmitted from the circuit board 12 to the metal clips 131 after passing through the fuses 121, the power indicator 122, and the protection element 123, and then the power after being connected to the grid is transmitted to the external plug 3.
Since the protection element 123 is a lightning arrester or a voltage suppressor, a surge of a small size can be eliminated by the protection element 123. In addition, after the electric power passes through the power indicator 122, the power indicator 122 generates light to inform the user that the protection device 1 is in a normal working state.
When any one of the grid-connected power supplies is abnormal, the fuse 121 is disconnected due to abnormal power, for example, when the fuse 121 is a resistive ceramic fuse, the internal part is disconnected due to an excessively high current or voltage, at this time, the power will not pass through the fuse 121, and the power indicator 122 is turned off due to the interruption of power supply, at this time, the user may know that the protection device 1 needs to be replaced.
In the present embodiment, the widths of the first connector 11, the circuit board 12, and the second connector 13 are the same or equivalent, and the heights of the first connector 11 and the second connector 13 are the same or equivalent. When a plurality of external plugs 3 are pegged graft behind this protection device 1, protection device 1 is because high low, promptly first connector 11 highly slightly is greater than under the condition of a plurality of metal pins 111's height, and because first connector 11 and second connector 13 are equal altitude again, consequently, protection device can reach frivolous short and small effect, and then can make when a plurality of protection device 1 use side by side, can not produce crowded situation and take place.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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 process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. The utility model provides a protection device for distributed generator is incorporated into power networks, connects between a plurality of grid-connected power supplies and low-voltage distribution network, its characterized in that: the protection device comprises a first connector, a circuit board, a second connector and a shell; the first connector comprises a plurality of metal pins which are used for being electrically connected with an external socket so as to lead in electric power needing grid connection; the circuit board comprises a plurality of fuses, a power indicator and a protection element, the circuit board is used for being electrically connected with the first connector, the first ends of the fuses are respectively and electrically connected with a plurality of metal pins of the first connector one by one, the second ends of the fuses are electrically connected with the power indicator, and the other end of the power indicator is connected with the protection element; the second connector comprises a plurality of metal clamping pieces which are used for being connected with an external plug; the shell is made of transparent materials, and the first connector, the circuit board and the second connector are all arranged inside the shell.
2. The protection device for grid connection of distributed power supplies according to claim 1, characterized in that: the protection element is a lightning arrester or a voltage suppressor.
3. The protection device for grid connection of distributed power supplies according to claim 1, characterized in that: the height of the first connector is approximately equal to the height of the metal pins.
4. The protection device for grid connection of distributed power supplies according to claim 1, characterized in that: the first connector corresponds to the width of the circuit board.
5. The protection device for grid connection of distributed power supplies according to claim 1, characterized in that: the circuit board is as high as the second connector.
6. The protection device for grid connection of distributed power supplies according to claim 1, characterized in that: the fuses are resistive ceramic fuses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921785948.7U CN210490483U (en) | 2019-10-23 | 2019-10-23 | Protection device for grid connection of distributed power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921785948.7U CN210490483U (en) | 2019-10-23 | 2019-10-23 | Protection device for grid connection of distributed power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210490483U true CN210490483U (en) | 2020-05-08 |
Family
ID=70510076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921785948.7U Active CN210490483U (en) | 2019-10-23 | 2019-10-23 | Protection device for grid connection of distributed power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210490483U (en) |
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2019
- 2019-10-23 CN CN201921785948.7U patent/CN210490483U/en active Active
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