Switch cabinet and transformer integrated structure

Abstract

The utility model relates to the technical field of power transmission equipment, and discloses a switch cabinet and transformer integrated structure. The switch cabinet and transformer integrated structure comprises an oil tank unit, a transformer body and a switch cabinet unit, the oil tank unit is provided with a containing space used for being filled with insulating oil, and an input terminal and an output terminal are arranged on the oil tank unit; the transformer body is arranged in the oil tank unit, and at least part of the transformer body is immersed in the insulating oil; the switch cabinet unit is arranged in the oil tank unit, and at least part of the switch cabinet unit is immersed in the insulating oil; the transformer body is electrically connected with the input terminal and the switch cabinet unit, and the switch cabinet unit is electrically connected with the output terminal. According to the integrated structure of the switch cabinet and the transformer, the transformer body and the switch cabinet unit are integrated together, the structure is compact, parts such as a grounding switch, a lightning arrester and a wiring terminal can be saved, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission equipment, in particular to an integrated structure of a switch cabinet and a transformer. Background Art

[0002] In power supply systems, switchgear and transformer cabinets work in tandem, and both are indispensable. In power plants and substations, switchgear controls and protects generators, power transformers, and high-voltage lines. Transformers, on the other hand, are responsible for voltage conversion to meet the voltage requirements of grid equipment. For example, in the power generation process, power transformers transmit power generated by power plants to the grid, increasing the output voltage to reduce energy losses during transmission. At the end of the grid, transformers are also needed to reduce the voltage to meet the voltage requirements of end users. In summary, the entire power generation, transmission, and distribution chain relies on the close cooperation between transformer cabinets and their directly affiliated switchgear.

[0003] In traditional solutions, transformer cabinets and switchgear are independent devices used as separate units, typically connected by cables or busbars. To ensure power system reliability, lightning arresters are required for each cabinet, as well as a grounding switch for the transformer cabinet. This not only occupies a large area, but also has numerous components and high costs. Utility Model Content

[0004] The purpose of the utility model is to propose an integrated structure of switch cabinet and transformer, integrating the transformer body and the switch cabinet unit together, which is not only compact in structure, but also can save components such as grounding switch, lightning arrester, terminal block, etc., and has low manufacturing cost.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] The switchgear and transformer integrated structure includes:

[0007] An oil tank unit has a storage space for filling insulating oil, and is provided with an input terminal and an output terminal;

[0008] a transformer body, disposed in the oil tank unit and at least partially immersed in the insulating oil;

[0009] a switch cabinet unit, disposed in the oil tank unit and at least partially immersed in the insulating oil;

[0010] The transformer body is electrically connected to the input terminal and the switch cabinet unit respectively, and the switch cabinet unit is electrically connected to the output terminal.

[0011] As an optional solution, the transformer body includes a transformer body, a first busbar and a second busbar, the transformer body is electrically connected to the input terminal through the first busbar, and is electrically connected to the switch cabinet unit through the second busbar.

[0012] As an optional solution, the oil tank unit includes a tank body and a tank cover, the upper end of the tank body is provided with an opening, and the tank cover can selectively block or open the opening.

[0013] As an optional solution, the oil tank unit further includes a sealing member, which is used to seal the tank body and the tank cover.

[0014] As an optional solution, the input terminal is a low-voltage input terminal, and the output terminal is a high-voltage output terminal; or

[0015] The input terminal is a high-voltage input terminal, and the output terminal is a low-voltage output terminal.

[0016] As an optional solution, the switch cabinet unit includes a cabinet body, a circuit breaker and an isolating switch, the circuit breaker and the isolating switch are both arranged in the cabinet body, the circuit breaker is electrically connected to the transformer body and the isolating switch respectively, and the isolating switch is electrically connected to the output terminal.

[0017] As an optional solution, the switch cabinet unit further includes:

[0018] a first outlet seat, passing through the cabinet and connected to the cabinet, the transformer body being electrically connected to the first outlet seat via a second busbar, and the circuit breaker being electrically connected to the first outlet seat via a first conductor;

[0019] The second outlet seat is passed through the cabinet and connected to the cabinet. The isolating switch is connected to the second outlet seat through a second conductor. The output terminal is electrically connected to the second outlet seat through a third busbar.

[0020] As an optional solution, the cabinet is made of insulating material.

[0021] As an optional solution, the circuit breaker and the disconnector are arranged vertically.

[0022] As an optional solution, the cabinet is filled with an insulating medium.

[0023] The beneficial effects of the utility model are:

[0024] By arranging both the transformer body and the switch cabinet unit within the oil tank unit, the switch cabinet and transformer are integrated into a whole. Compared to existing oil-immersed transformers, only a smaller volume of the oil tank needs to be increased to accommodate the switch cabinet unit, making the overall structure more compact and helping to save space occupied by the equipment. The transformer body and the switch cabinet unit are directly connected inside the oil tank unit. Compared to existing solutions, this can save the wiring terminals on the transformer cabinet for supporting the busbars electrically connecting the transformer cabinet and the switch cabinet, and can also reduce the amount of busbars used. The transformer body and the switch cabinet unit are both located within the oil tank unit, so they can share a lightning arrester, thereby saving one lightning arrester compared to the existing technology. When inspecting the transformer body, the switch cabinet unit can be used to implement power-off and grounding settings, saving one grounding switch compared to the existing technology. In summary, the switch cabinet and transformer integrated structure of the present invention is not only compact in structure, but also saves some parts and components, and has low manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the integrated switchgear and transformer provided by a specific embodiment of the present utility model;

[0026] Figure 2 It is a structural diagram of a switch cabinet unit provided by a specific embodiment of the present utility model.

[0027] In the picture:

[0028] 10. Fuel tank unit; 11. Tank body; 12. Tank cover;

[0029] 20. Transformer body; 21. Transformer body; 22. First busbar; 23. Second busbar;

[0030] 30. Switchgear unit; 31. Cabinet; 32. Circuit breaker; 321. Circuit breaker body; 322. Incoming terminal; 323. Outgoing terminal; 33. Disconnector; 34. First outlet base; 35. First conductor; 36. Second outlet base; 37. Second conductor;

[0031] 41. Input terminal; 42. Output terminal; 43. Third busbar. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0033] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0036] This embodiment provides a switch cabinet and transformer integrated structure, which can be used in power transmission systems. Figure 1 As shown, the integrated switchgear and transformer structure includes an oil tank unit 10, a transformer body 20, and a switchgear unit 30. The oil tank unit 10 has a storage space filled with insulating oil. Input terminals 41 and output terminals 42 are provided on the oil tank unit 10. The transformer body 20 is disposed within the oil tank unit 10 and is at least partially immersed in the insulating oil. The switchgear unit 30 is disposed within the oil tank unit 10 and is at least partially immersed in the insulating oil. The transformer body 20 is electrically connected to the input terminals 41 and the switchgear unit 30, respectively. The switchgear unit 30 is electrically connected to the output terminals 42.

[0037] The integrated switchgear and transformer structure of this embodiment, by locating both the transformer body 20 and the switchgear unit 30 within the oil tank unit 10, forms a single unit. Compared to existing oil-immersed transformers, only a smaller increase in the oil tank volume is required to accommodate the switchgear unit 30, making the overall structure more compact and conserving equipment space. The transformer body 20 and the switchgear unit 30 are directly connected within the oil tank unit 10. Compared to existing solutions, this eliminates the need for busbar terminals on the transformer cabinet that support the electrical connection between the transformer cabinet and the switchgear, and also reduces the amount of busbar used. Since both the transformer body 20 and the switchgear unit 30 are located within the oil tank unit 10, they can share a single lightning arrester, saving one arrester compared to existing technologies. When servicing the transformer body 20, the switchgear unit 30 can be used to disconnect and ground the transformer, eliminating one grounding switch compared to existing technologies. In summary, the integrated switchgear and transformer structure of this embodiment is not only compact but also saves on components, resulting in low manufacturing costs.

[0038] Specifically, if Figure 1 As shown, the oil tank unit 10 includes a box body 11 and a box cover 12. The upper end of the box body 11 is provided with an opening, and the box cover 12 can selectively block or open the opening. By opening and closing the box cover 12, the switch cabinet unit 30 and the transformer body 20 can be conveniently disassembled, assembled, and repaired. Preferably, the oil tank unit 10 also includes a seal, which is used to seal the box body 11 and the box cover 12. By providing the seal, the sealing performance of the oil tank unit 10 can be improved, oil leakage or external impurities entering the oil tank unit 10 can be avoided, and the safety and service life of the integrated structure of the switch cabinet and transformer can be improved. Optionally, the seal can be a rubber sealing ring, etc., which is not specifically limited here.

[0039] In some embodiments, the integrated switchgear and transformer structure further includes an oil supply unit, which is disposed outside the oil tank unit 10 and is used to supply insulating oil to the oil tank unit 10. Furthermore, the oil supply unit can circulate and cool the insulating oil, thereby dissipating heat from the transformer body 20 and the switchgear unit 30. It is understood that the oil supply unit can be any conventional method as long as it can achieve oil circulation and cooling functions.

[0040] In some embodiments, the input terminals 41 of the integrated switchgear and transformer structure are low-voltage input terminals, and the output terminals 42 are high-voltage output terminals. The transformer body 20 can convert low-voltage electricity into high-voltage electricity. In this case, the integrated switchgear and transformer structure can be used in power plants, converting low-voltage electricity from the power plant into high-voltage electricity before transmitting it to the power grid, thereby reducing power loss. Optionally, the low-voltage input terminals can be low-voltage external bushings, and the high-voltage output terminals can be high-voltage external bushings.

[0041] In some embodiments, the input terminal 41 of the integrated switchgear and transformer structure can also be a high-voltage input terminal, and the output terminal 42 can be a low-voltage output terminal. The transformer can then convert high-voltage electricity into low-voltage electricity. In this case, the integrated switchgear and transformer structure can be used in power consumption sites to convert high-voltage electricity from the transmission grid into the required low-voltage electricity for use.

[0042] like Figure 1 As shown, the transformer body 20 includes a transformer body 21, a first busbar 22, and a second busbar 23. The transformer body 21 is electrically connected to the input terminal 41 via the first busbar 22, and the transformer body 21 is electrically connected to the switchgear unit 30 via the second busbar 23. Since both the transformer body 21 and the switchgear unit 30 are located within the oil tank unit 10, only one busbar is required between the corresponding phases of the transformer body 21 and the switchgear unit 30. This reduces the number and length of busbars used, lowers costs, and facilitates assembly. It should be noted that three input terminals 41 are provided, the transformer body 21 includes three phases, and the input end of the switchgear unit 30 also has three phases. Accordingly, the first busbar 22 and the second busbar 23 are each provided for three phases. The first busbar 22 of each phase connects the input terminal 41 to the corresponding phase of the transformer body 21, and the second busbar 23 of each phase connects the transformer body 21 to the corresponding phase of the switchgear unit 30.

[0043] like Figure 1 and Figure 2 As shown, the switchgear unit 30 includes a cabinet 31, a circuit breaker 32, and a disconnector 33. Both the circuit breaker 32 and the disconnector 33 are disposed within the cabinet 31. The circuit breaker 32 is electrically connected to the transformer body 20 and the disconnector 33, respectively. The disconnector 33 is electrically connected to the output terminal 42. On the one hand, the provision of the cabinet 31 ensures the independence of the entire switchgear unit 30 and reduces the mutual influence between the circuit breaker 32 and the disconnector 33 and the transformer body 21. On the other hand, when assembling the integrated switchgear and transformer structure, the switchgear unit 30 can be assembled as a whole outside the oil tank unit 10 and then installed into the oil tank unit 10, making the assembly operation more convenient.

[0044] In this embodiment, the cabinet body 31 is made of an insulating material, thereby improving the safety of the integrated switchgear and transformer structure. Optionally, the cabinet body 31 can be made of a plastic with high structural strength, which is not specifically limited here. In this embodiment, the cabinet body 31 is filled with an insulating medium, thereby improving the electrical safety of the switchgear unit 30. The insulating medium can be either insulating gas or insulating oil, and can be flexibly selected as needed.

[0045] like Figure 2As shown, the circuit breaker 32 and disconnector 33 are arranged vertically. Because the transformer body 21 is relatively tall, the space within the oil tank unit 10 is also relatively high. By arranging the circuit breaker 32 and disconnector 33 vertically, the cabinet body 31 can be constructed into a slender and tall structure, reducing the horizontal area occupied by the switchgear unit 30 and further improving the compactness of the integrated switchgear and transformer structure. In this embodiment, the disconnector 33 is positioned above the circuit breaker 32 to facilitate connection with the output terminals 42 located higher up in the oil tank unit 10.

[0046] In this embodiment, the circuit breaker 32 includes a circuit breaker body 321, an inlet terminal 322, and an outlet terminal 323. The circuit breaker body 321 includes a vacuum interrupter. The inlet terminal 322 is provided at the lower end of the circuit breaker body 321 and is used to connect to the transformer body 21. The outlet terminal 323 is provided at the upper end of the circuit breaker body 321 and is electrically connected to the disconnector 33.

[0047] like Figure 2 As shown, the switch cabinet unit 30 also includes a first outlet seat 34, a first conductor 35, a second outlet seat 36, and a second conductor 37. The first outlet seat 34 extends through the cabinet body 31 and is connected to the cabinet body 31. The transformer body 20 is electrically connected to the first outlet seat 34 via the second busbar 23, and the circuit breaker 32 is electrically connected to the first outlet seat 34 via the first conductor 35. The second outlet seat 36 extends through the cabinet body 31 and is connected to the cabinet body 31. The disconnector 33 is connected to the second outlet seat 36 via the second conductor 37, and the output terminal 42 is electrically connected to the second outlet seat 36 via the third busbar 43. This arrangement achieves internal electrical connections within the entire switch cabinet unit 30, as well as electrical connections to the transformer body 21 and the output terminal 42. In this embodiment, the first outlet base 34 is disposed on the side of the cabinet 31 facing the transformer body, and the second outlet base 36 is disposed on the side of the cabinet 31 facing the output terminal 42. This facilitates shortening the length of the second busbar 23 and the third busbar 43 and avoids interference between the second busbar 23 and the third busbar 43. It should be noted that the first outlet base 34, the first conductor 35, the second outlet base 36, the second conductor 37, and the third busbar 43 are all provided for three phases.

[0048] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will, based on the concept of the present invention, vary the specific implementation methods and scope of application, and the contents of this specification should not be construed as limiting the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The switchgear and transformer are integrated into one structure, characterized in that: include: An oil tank unit (10) has a storage space for filling insulating oil, and an input terminal (41) and an output terminal (42) are provided on the oil tank unit (10); A transformer body (20) is disposed in the oil tank unit (10) and is at least partially immersed in the insulating oil; A switch cabinet unit (30) is disposed in the oil tank unit (10) and is at least partially immersed in the insulating oil; The transformer body (20) is electrically connected to the input terminal (41) and the switch cabinet unit (30), respectively, and the switch cabinet unit (30) is electrically connected to the output terminal (42).

2. The switch cabinet and transformer integrated structure according to claim 1, characterized in that: The transformer body (20) comprises a transformer body (21), a first busbar (22) and a second busbar (23); the transformer body (21) is electrically connected to the input terminal (41) via the first busbar (22), and is electrically connected to the switch cabinet unit (30) via the second busbar (23).

3. The switch cabinet and transformer integrated structure according to claim 1, characterized in that: The oil tank unit (10) comprises a tank body (11) and a tank cover (12); an opening is provided at the upper end of the tank body (11); and the tank cover (12) can selectively block or open the opening.

4. The switch cabinet and transformer integrated structure according to claim 3, characterized in that: The oil tank unit (10) further comprises a sealing member, which is used to seal the tank body (11) and the tank cover (12).

5. The switch cabinet and transformer integrated structure according to claim 1, characterized in that: The input terminal (41) is a low-voltage input terminal, and the output terminal (42) is a high-voltage output terminal; or The input terminal (41) is a high-voltage input terminal (41), and the output terminal (42) is a low-voltage output terminal (42).

6. The switch cabinet and transformer integrated structure according to any one of claims 1 to 5, characterized in that: The switch cabinet unit (30) comprises a cabinet body (31), a circuit breaker (32) and an isolating switch (33); the circuit breaker (32) and the isolating switch (33) are both arranged in the cabinet body (31); the circuit breaker (32) is electrically connected to the transformer body (20) and the isolating switch (33), respectively; and the isolating switch (33) is electrically connected to the output terminal (42).

7. The switch cabinet and transformer integrated structure according to claim 6, characterized in that: The switch cabinet unit (30) further includes: A first outlet seat (34) is provided through the cabinet (31) and is connected to the cabinet (31); the transformer body (20) is electrically connected to the first outlet seat (34) via a second busbar (23); and the circuit breaker (32) is electrically connected to the first outlet seat (34) via a first conductor (35); The second outlet seat (36) is passed through the cabinet (31) and is connected to the cabinet (31); the isolating switch (33) is connected to the second outlet seat (36) via a second conductor (37); and the output terminal (42) is electrically connected to the second outlet seat (36) via a third busbar (43).

8. The switch cabinet and transformer integrated structure according to claim 6, characterized in that: The cabinet (31) is made of insulating material.

9. The switch cabinet and transformer integrated structure according to claim 6, characterized in that: The circuit breaker (32) and the disconnector (33) are arranged vertically.

10. The switch cabinet and transformer integrated structure according to claim 6, characterized in that: The cabinet (31) is filled with an insulating medium.

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