CN219553399U - Combined transformer with electric network access control function - Google Patents
Combined transformer with electric network access control function Download PDFInfo
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- CN219553399U CN219553399U CN202321140549.1U CN202321140549U CN219553399U CN 219553399 U CN219553399 U CN 219553399U CN 202321140549 U CN202321140549 U CN 202321140549U CN 219553399 U CN219553399 U CN 219553399U
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- control device
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Abstract
The utility model discloses a combined transformer with an electrified network access control function, which belongs to the technical field of transformers and comprises an oil-immersed transformer, an oil-immersed load switch and a high-voltage chamber, wherein the oil-immersed load switch is immersed in transformer oil, an on-off control device is arranged in the high-voltage chamber and is connected in series with a circuit between the oil-immersed transformer and a power grid for controlling the on-off of the circuit between the oil-immersed transformer and the power grid.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a combined transformer with a network access control function.
Background
The combined transformer is a transformer combining a transformer body, switching equipment, a fuse and corresponding auxiliary equipment. The transformer is characterized in that a transformer is taken as a main body, and accessories on the high-voltage side, such as a fuse, a load switch and the like, are fully placed in a transformer oil tank. Wherein, its load switch adopts oil-immersed load switch.
The combined transformer has low manufacturing cost and small occupied area, so the combined transformer is more used in the wind power generation industry and the photovoltaic power generation industry. However, both the wind power project and the photovoltaic project generate electricity intermittently, namely, the wind power project and the photovoltaic project cannot generate electricity all the time, particularly, the photovoltaic project generates electricity when light exists in the daytime, the wind power project and the photovoltaic project cannot generate electricity at night, and when the combined transformer is electrified, no-load loss of the combined transformer also consumes electric energy of a power grid.
In order to avoid no-load loss and consume electric energy of the power grid, the winding of the combined transformer is disconnected from the power grid, so that the winding is prevented from being in a live state for a long time. Referring to the standard of the oil-immersed load switch for the JB T10681-2006 combined transformer, regarding the performance requirement part, the "mechanical operation life of the load switch" is specified in "5.3.11 mechanical operation life" and the mechanical operation life of the load switch should not be lower than 2000 times at normal temperature ", so the designed mechanical operation life of the current oil-immersed load switch on the market is mostly based on the minimum requirement of the standard, that is, the switching times of the oil-immersed load switch are relatively limited. The scheme of switching the oil-immersed load switch to disconnect the windings from the power grid is not preferable because the limited switching times of the oil-immersed load switch are limited.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a combined transformer with a network access control function.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a combination formula transformer of electrified net access control function, includes oil-immersed transformer, oil-immersed load switch and high-voltage chamber, oil-immersed load switch is immersed in transformer oil, be equipped with on-off control device in the high-voltage chamber, on-off control device establishes ties on the circuit between oil-immersed transformer and the electric wire netting for control on-off of circuit between oil-immersed transformer and the electric wire netting.
Preferably, the on-off control device adopts a contactor.
Preferably, in another aspect, the on-off control device adopts a high-voltage automatic circuit breaker.
Preferably, the control contact of the on-off control device is connected with the power generation system, and the on-off control device is triggered to act through starting and closing of the power generation system.
Preferably, the on-off control device is inversely installed under the top cover of the high-pressure chamber.
Preferably, the on-off control device is horizontally installed on a side wall of the high pressure chamber.
Preferably, the on-off control device is connected between the oil-immersed load switch and the power grid.
Preferably, the combined transformer further comprises a fuse, and the fuse is connected between the oil-immersed load switch and the oil-immersed transformer.
The beneficial effects of the utility model are as follows: compared with the prior art, the on-off control device is arranged on the line between the oil-immersed transformer and the power grid, and then the on-off control device can be used for controlling the on-off of the line between the oil-immersed transformer and the power grid, namely controlling whether the oil-immersed transformer is connected to the power grid or not, so that the on-off control device is matched, when the power generation system is in a closed state and the oil-immersed transformer is in an empty state, the combined transformer is disconnected from the power grid, the long-term electrification of the windings of the combined transformer and the consumption of the electric energy of the power grid due to the empty loss of the windings of the combined transformer are avoided, wherein the contactor is adopted as the on-off control device, the mechanical life of the contactor is as high as millions, and compared with the connection between the windings and the power grid through the oil-immersed load switch, the switching times of the combined transformer are higher, and the overall cost is lower; in addition, through inserting the contactor between oil-immersed load switch 11 and electric wire netting 40, when need carry out maintenance, only need break the contactor, can open the case and overhaul, improved the convenience of follow-up maintenance.
Drawings
FIG. 1 is a side view (cross-sectional view) of a first embodiment of the present utility model;
FIG. 2 is a top view (cross-sectional view) of a first embodiment of the present utility model;
FIG. 3 is a schematic diagram illustrating a connection according to a first embodiment of the present utility model;
FIG. 4 is a side view (cross-sectional view) of a second embodiment of the present utility model;
fig. 5 is a connection schematic diagram of a second embodiment of the present utility model.
In the figure, 10, an oil immersed transformer; 11. an oil immersed load switch; 12. a high voltage bushing; 13. a fuse; 20. a high pressure chamber; 21. an on-off control device; 30. a low pressure chamber; 40. a power grid; 50. a power generation system.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Example 1
As shown in fig. 1-3, the combined transformer with the network access control function provided by the utility model comprises an oil immersed transformer 10, an oil immersed load switch 11, a high-voltage chamber 20 and a low-voltage chamber 30, wherein the oil immersed load switch 11 is immersed in transformer oil, an output line of a power generation system 50 is connected with the oil immersed transformer 10, and an on-off control device 21 is arranged in the high-voltage chamber 20, wherein in the embodiment, the on-off control device 21 adopts a contactor, the on-off control device 21 is connected in series on a line between the oil immersed transformer 10 and a power grid 40, and specifically, the on-off control device 21 is connected between the oil immersed load switch 11 and the power grid 40 and is used for controlling the on-off of the line between the oil immersed transformer 10 and the power grid 40 according to the state of the power generation system 50, and the power generation system 50 comprises, but is not limited to a photovoltaic power generation system, a wind power generation system, an energy storage charging and discharging system and a tide power generation system, and the state of the power generation system 50 comprises, but is not limited to an on-off state and an output power section.
Specifically, the contactor is arranged on a line between the oil-immersed transformer 10 and the power grid 40 in series, and the oil-immersed transformer 10 and the power generation system 50 can be separated from the power grid 40 by opening the contactor, wherein the on-off of the contactor can be manually controlled according to the state of the power generation system 50, such as the state of the power generation system 50 being started or closed, and the on-off of the contactor can be automatically controlled or remotely controlled by the executing mechanism.
Compared with the prior art, the on-off control device 21 is arranged on the line between the oil-immersed transformer 10 and the power grid 40, and then the on-off control device 21 can be used for controlling the on-off of the line between the oil-immersed transformer 10 and the power grid 40, namely controlling whether the oil-immersed transformer 10 is connected with the power grid 40 or not, so that the combined transformer is disconnected with the power grid 40 when the power generation system 50 is in a closed state and the oil-immersed transformer 10 is in an empty state in cooperation with the on-off control device 21, the long-term electrification of the windings of the combined transformer and the consumption of electric energy of the power grid 40 due to the empty load loss of the windings of the combined transformer are avoided, wherein the contactor is adopted as the on-off control device 21, the mechanical life is millions, and compared with the connection between the windings and the power grid 40 controlled through the oil-immersed load switch 11, the switching times are higher, and the overall cost is lower; in addition, through inserting the contactor between oil-immersed load switch 11 and electric wire netting 40, when need carry out maintenance, only need break the contactor, can open the case and overhaul, improved the convenience of follow-up maintenance.
Further, the control contact of the contactor is connected with the power generation system 50, and the contactor is triggered to act through the starting and the closing of the power generation system 50, wherein after the power generation system 50 is started, the contactor coil is electrified, the coil current generates a magnetic field, so that the static iron core of the contactor generates electromagnetic attraction, and the movable iron core is attracted to slide through the electromagnetic attraction, namely the contactor is driven to act.
Further, in order to improve the space utilization rate in the high pressure chamber 20, the on-off control device 21 is inversely installed under the top cover of the high pressure chamber 20, thereby saving the overall space.
Further, the combined transformer further comprises a fuse 13 for overcurrent protection, and the fuse 13 is connected between the oil-immersed load switch 11 and the oil-immersed transformer 10.
Example two
As shown in fig. 4 to 5, the present embodiment is different from the above embodiment in that the on-off control device 21 employs a high-voltage automatic circuit breaker, wherein the high-voltage automatic circuit breaker employs an M2-level high-voltage ac circuit breaker, and the M2-level high-voltage ac circuit breaker has a mechanical operation number of more than 1 ten thousand times.
Specifically, the high-voltage automatic circuit breaker is serially arranged on the line between the oil-immersed transformer 10 and the power grid 40, and the oil-immersed transformer 10 and the power generation system 50 can be separated from the power grid 40 by breaking the high-voltage automatic circuit breaker, wherein the on-off of the high-voltage automatic circuit breaker can be manually controlled according to the state of the power generation system 50, such as the state that the power generation system 50 is in the on or off state, or the on-off of the high-voltage automatic circuit breaker can be automatically controlled or remotely controlled by an executing mechanism, and compared with the case that the connection between the winding and the power grid 40 is controlled by the oil-immersed load switch 11, the high-voltage automatic circuit breaker with the switching service life longer than that of the oil-immersed load switch 11 is adopted as the on-off control device 21, so that the whole cost is lower.
Further, in order to improve the space utilization rate in the high pressure chamber 20, the on-off control device 21 is horizontally installed on the sidewall of the high pressure chamber 20.
The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.
Claims (8)
1. The utility model provides a combination formula transformer of electrified network access control function, includes oil-immersed transformer (10), oil-immersed load switch (11) and high-voltage chamber (20), and oil-immersed load switch (11) is immersed in transformer oil, a serial communication port, be equipped with on-off control device (21) in high-voltage chamber (20), on-off control device (21) establish ties on the circuit between oil-immersed transformer (10) and electric wire netting (40), be used for controlling the break-make of circuit between oil-immersed transformer (10) and electric wire netting (40).
2. The combination transformer with network access control function according to claim 1, characterized in that the on-off control means (21) employs contactors.
3. The combination transformer with network access control function according to claim 1, characterized in that the on-off control means (21) adopts a high voltage automatic circuit breaker.
4. The transformer with network access control function according to claim 1, wherein the control contact of the on-off control device (21) is connected with the power generation system (50), and the on-off control device (21) is triggered to operate by starting and closing the power generation system (50).
5. The combination transformer with network access control function according to claim 1, characterized in that the on-off control device (21) is mounted upside down under the top cover of the high voltage chamber (20).
6. The combination transformer with network access control function according to claim 1, characterized in that the on-off control device (21) is horizontally mounted on the side wall of the high voltage chamber (20).
7. The combination transformer with a mains access control function according to claim 1, characterized in that the on-off control device (21) is connected between the oil immersed load switch (11) and the mains (40).
8. The combination transformer with a network access control function according to claim 1, further comprising a fuse (13), the fuse (13) being interposed between the oil-immersed load switch (11) and the oil-immersed transformer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321140549.1U CN219553399U (en) | 2023-05-12 | 2023-05-12 | Combined transformer with electric network access control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321140549.1U CN219553399U (en) | 2023-05-12 | 2023-05-12 | Combined transformer with electric network access control function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219553399U true CN219553399U (en) | 2023-08-18 |
Family
ID=87701309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321140549.1U Active CN219553399U (en) | 2023-05-12 | 2023-05-12 | Combined transformer with electric network access control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219553399U (en) |
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2023
- 2023-05-12 CN CN202321140549.1U patent/CN219553399U/en active Active
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