Gas-insulated switchgear

Abstract

The utility model relates to a kind of gas insulated switchgear, for being connected with first transformer, including current transformer module, grounding switch module, lightning arrester module, first adapter module and second adapter module.The one end of first adapter module is configured to be connected to transformer direct connection module on transformer, and the other end is connected to current transformer module.Second adapter module is cross-shaped to form respectively towards the first interface, second interface, third interface and fourth interface.Electric current transformer module is connected to the first interface away from the one end of first adapter module, grounding switch module is connected to the second interface, lightning arrester module is connected to the fourth interface, third interface is configured to have first state and second state, in first state, third interface is used to be connected with test equipment, in second state, by sealing cover closed.The gas insulated switchgear structure is compact, can be connected to transformer in the case where space is narrow.

Description

Technical Field

[0001] This application relates to a gas-insulated switchgear (GIS), specifically a gas-insulated switchgear for neutral point grounding of a transformer. Background Technology

[0002] In the prior art, gas-insulated switchgear used for transformer neutral point grounding is typically very large. Therefore, compact design needs to be considered when designing and manufacturing gas-insulated switchgear.

[0003] In addition, after the GIS is installed, an on-site pressure test is required to check whether the GIS meets the standards. However, the construction site is usually quite small, which makes the test inconvenient. Utility Model Content

[0004] In view of this, the present invention proposes a gas-insulated switchgear for transformer neutral point grounding, which has a compact structure, is easy to install and test on site, and solves the above-mentioned defects in the prior art.

[0005] According to one aspect of this application, a gas-insulated switchgear is provided for connection to a first transformer, comprising a current transformer module, a grounding switch module, and a surge arrester module, and further comprising a first adapter module and a second adapter module. One end of the first adapter module is configured for connection to a transformer direct-connect module located on the transformer, and the other end is connected to the current transformer module. The second adapter module is cross-shaped to form a first interface, a second interface, a third interface, and a fourth interface facing four directions respectively. The end of the current transformer module furthest from the first adapter module is connected to the first interface, the grounding switch module is connected to the second interface, the surge arrester module is connected to the fourth interface, and the third interface is configured to have a first state and a second state, wherein in the first state, the third interface is used for connection to test equipment, and in the second state, the third interface is closed by a sealing cap.

[0006] According to the gas-insulated switchgear of this application, it is connected to the transformer via a first adapter module. It has a compact structure and can be connected to the transformer even in the case of limited space at the construction site. Furthermore, the second adapter module has a reserved test interface, which can facilitate the testing of the gas-insulated switchgear.

[0007] Furthermore, the first and third interfaces are arranged opposite each other, and the second and fourth interfaces are arranged opposite each other. This structure allows the grounding switch module and the surge arrester module to be arranged opposite each other, and both are arranged adjacent to the current transformer module, achieving a compact structure and easy installation.

[0008] Furthermore, the first adapter includes a first adapter housing, a fixed conductor, and a detachable conductor. The fixed conductor is connected to the main line of the gas-insulated switchgear, and the detachable conductor is detachably connected between the fixed conductor and the transformer direct-connection module. The detachable conductor in the first adapter facilitates withstand voltage testing at the construction site after the gas-insulated switchgear is installed. The structure is simple and easy to disassemble.

[0009] Furthermore, the detachable conductor is bolted to the fixed conductor and inserted into the transformer direct-connect module to achieve connection with the transformer direct-connect module. The connection method of the detachable conductor is simple and easy to implement, reducing the difficulty of on-site construction. In addition, the detachable conductor facilitates switching between on-site operation and testing states, protecting the first transformer from the impact of on-site withstand voltage tests.

[0010] Furthermore, the detachable conductor includes a cylindrical component and a cup-shaped component. The cylindrical component is connected to the fixed conductor and the cup-shaped component respectively by bolts. The cup-shaped component is inserted into the connection slot of the transformer direct-connection module. By sliding the cup-shaped component into the connection slot of the transformer direct-connection module, the axial connection error of the detachable conductor is absorbed, and the structure is simple and easy to install.

[0011] Furthermore, in the first state, the detachable conductor is removed from the fixed conductor and the transformer direct-connection module, and an insulating shield is connected to the end of the fixed conductor used for connecting to the detachable conductor. By setting an insulating shield at one end of the fixed conductor, arcing is prevented, ensuring safety during the testing process before formal operation.

[0012] Furthermore, in the first state, the cylindrical member is removed from between the fixed conductor and the cup-shaped member, while the cup-shaped member remains inserted in the connection slot. Leaving the cup-shaped member in the connection slot creates a break between the cup-shaped member and the insulating shield head, where the cup-shaped member also acts as a shield head, providing shielding during the test.

[0013] Furthermore, the insulating shield head is hemispherical in shape, with the flat portion of the hemisphere abutting against the fixed conductor and the curved portion forming the free end. The simple structure and shape of the insulating shield head effectively prevent arcing between the fixed conductor and the transformer's direct-connection module.

[0014] Furthermore, the insulating shield head is connected to the fixed conductor by bolts. This connection method is simple in structure and low in cost.

[0015] Furthermore, the gas-insulated switchgear includes a bracket fixed to the ground, and the surge arrester module is fixed on the bracket. This fixing method makes full use of the site space, has a simple structure, and is easy to operate. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram showing the connection between the gas-insulated switchgear of this application and a transformer.

[0018] Figure 2 This is a perspective view of the gas-insulated switchgear of this application.

[0019] Figure 3 This is a side view and a partial enlarged view of the gas-insulated switchgear of this application.

[0020] Figure 4 This is a perspective view of the gas-insulated switchgear of this application under test conditions.

[0021] Figure 5 This is a side view and a partial enlarged view of the gas-insulated switchgear of this application under test conditions.

[0022] The reference numerals in the attached figures are as follows:

[0023] 1. Gas-insulated switchgear

[0024] 2. Current transformer module

[0025] 3. Grounding switch module

[0026] 4. Surge arrester module

[0027] 5. First adapter module

[0028] 51. First adapter housing

[0029] 52. Fixed conductor

[0030] 53. Detachable conductor

[0031] 531. Columnar component

[0032] 532. Cup-shaped parts

[0033] 54. Inspection port

[0034] 6. Second adapter module

[0035] 61. First Interface

[0036] 62. Second Interface

[0037] 63. Third Interface

[0038] 64. Fourth Interface

[0039] 65. Sealing cap

[0040] 7. First Transformer

[0041] 8. Transformer direct-connect module

[0042] 81. Connecting slot

[0043] 9. Test equipment

[0044] 91. Test connection module

[0045] 92. Test sleeve

[0046] 10. Insulated shielding head

[0047] 11. Bracket Detailed Implementation

[0048] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps, modules, or units is not necessarily limited to those explicitly listed, but may include other steps, modules, or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, according to one embodiment of this application, a gas-insulated switchgear 1 is provided for grounding the neutral point of a first transformer 7. The gas-insulated switchgear 1 includes a current transformer module 2, a grounding switch module 3, and a surge arrester module 4, and also includes a first adapter module 5 and a second adapter module 6.

[0051] like Figure 1As shown, one end of the first adapter module 5 is configured to connect to the transformer direct connection module 8 located on the first transformer 7, and the other end is connected to the current transformer module 2.

[0052] The second adapter module 6 is cross-shaped to form a first interface 61, a second interface 62, a third interface 63, and a fourth interface 64 facing four directions respectively. The end of the current transformer module 2 furthest from the first adapter module 5 is connected to the first interface 61, the grounding switch module 3 is connected to the second interface 62, and the surge arrester module 4 is connected to the fourth interface 64. The third interface 63 is configured to have a first state and a second state, wherein in the first state, such as Figure 3 and Figure 4 As shown, the third interface 63 is used for connection to the test equipment. In the second state, as... Figures 1 to 3 As shown, it is sealed by the sealing cap 65.

[0053] Preferably, the first interface 61 and the third interface 63 are arranged opposite to each other, and the second interface 62 and the fourth interface 64 are arranged opposite to each other, so that the grounding switch module 3 and the surge arrester module 4 are arranged opposite to each other, and both are arranged adjacent to the sixth current transformer module.

[0054] like Figure 3 As shown, the first adapter module 5 includes a first adapter housing 51, a fixed conductor 52, and a detachable conductor 53.

[0055] The fixed conductor 52 is connected to the main line of the gas-insulated switchgear 1, and the detachable conductor 53 is detachably connected between the fixed conductor 52 and the transformer direct connection module 8.

[0056] Specifically, the detachable conductor 53 is bolted to the fixed conductor 52 and inserted into the transformer direct connection module 8 to achieve connection with the transformer direct connection module 8. This connection method of inserting the detachable conductor 53 into the transformer direct connection module 8 can include sliding insertion into the transformer direct connection module 8. Since sliding insertion has a large sliding range, it absorbs the axial connection error of the detachable conductor 53.

[0057] The detachable conductor 53 includes a cylindrical member 531 and a cup-shaped member 532. The cylindrical member 531 is connected to the fixed conductor 52 and the cup-shaped member 532 respectively by bolts. The cup-shaped member 532 is inserted into the connection slot 81 of the transformer direct connection module 8.

[0058] When removing the removable conductor 53 from between the fixed conductor 52 and the connecting slot 81, only the cylindrical member 531 can be removed, while the cup-shaped member 532 remains in the connecting slot 81, as shown below. Figure 5 As shown.

[0059] In addition, the first adapter module 5 may also include an access port 54 for inspecting and maintaining devices located in the first adapter module 5. The access port 54 is provided on the first adapter housing 51.

[0060] According to one embodiment of this application, such as Figure 4 and Figure 5 As shown, before the gas-insulated switchgear 1 can be put into operation, it needs to be connected to the test equipment 9 to conduct tests. Specifically, the third interface 63 of the second adapter module 6 is connected to the test equipment 9, and the detachable conductor 53 is disconnected from the fixed conductor 52 and the transformer direct connection module 8, thereby disconnecting the gas-insulated switchgear 1 from the transformer direct connection module 8 and the first transformer 7, so as to conduct tests on the gas-insulated switchgear 1.

[0061] Preferably, the test equipment 9 includes a test connection module 91 and a test sleeve 92. The test connection module 91 is connected to the third interface 63, one end of the test sleeve 92 is connected to the test connection module 91, and the other end is configured to be connected to a second transformer, which is a test transformer.

[0062] In the first state, i.e. the test state, the detachable conductor 53 is removed from between the fixed conductor 52 and the transformer direct connection module 8. An insulating shield head 10 is connected to the end of the fixed conductor 52 that is used to connect with the detachable conductor 53 to prevent electric arcing from occurring in the first adapter module 5 during the test.

[0063] The insulating shield head 10 is connected to the fixed conductor 52 by bolts.

[0064] Preferably, the insulating shield head 10 can be hemispherical in shape, with the flat portion of the hemisphere abutting the fixed conductor 52 and the curved portion of the hemisphere forming a free end.

[0065] Furthermore, preferably, when the detachable conductor 53 is removed from between the fixed conductor 52 and the transformer direct connection module 8, only the cylindrical member 531 can be removed, while the cup-shaped member 532 remains in the connection slot 81, thereby forming a break between the cup-shaped member 532 and the insulating shield head 10, such as Figure 5 As shown. The cup-shaped component 532 also acts as a shielding head, providing shielding during the test. The shielding effect of the cup-shaped component 532 is affected by its shape and surface roughness, etc.

[0066] In the test state, the detachable conductor 53 is removed from between the fixed conductor 52 and the transformer direct connection module 8. Specifically, only the cylindrical part 531 is removed, while the cup-shaped part 532 remains in the connection slot 81. Then, the insulating shield head 10 is installed to the fixed conductor 52, the test connection module 91 of the test equipment 9 is installed to the third interface 63, the test sleeve 92 is installed to the test connection module 91, and the test transformer (not shown in the figure) is connected to the test sleeve 92. The test transformer is then connected to the gas-insulated switchgear 1 to perform a withstand voltage test on the gas-insulated switchgear 1.

[0067] According to the preferred embodiment, such as Figure 4 As shown, the test connection module 91 includes three 90-degree elbows and one 45-degree elbow. The first of the three 90-degree elbows is connected to the third interface 63, the second of the three 90-degree elbows is located between the other two 90-degree elbows, and the third of the three 90-degree elbows is connected to one end of the 45-degree elbow, and the other end of the 45-degree elbow is connected to the test sleeve 92.

[0068] In addition, operators can change the number and angle of elbows as needed on site, and the direction and angle of the test sleeve can be changed as a result, provided it is safe to do so, to adapt to the site conditions.

[0069] After the withstand voltage test confirms that the gas-insulated switchgear 1 can be used normally, the test device 9 is removed from the third interface 63, and a sealing cover 65 is installed at the third interface. In addition, the insulating shield head 10 is removed from the fixed conductor 52, and the cylindrical member 531 is reinstalled between the fixed conductor 52 and the cup-shaped member 532 so that the gas-insulated switchgear 1 can be connected to the transformer direct connection module 8 and the first transformer 7.

[0070] The gas-insulated switchgear 1 includes a bracket 11, which is fixed to the ground, and the surge arrester module 4 is fixed on the bracket 11.

[0071] The surge arrester module 4 includes a manual disconnect switch. In the test state, the surge arrester module 4 is disconnected from the main circuit, and after the test, it is easy to restore the connection with the main circuit.

[0072] According to this application, the gas-insulated switchgear is connected to the transformer via a first adapter module. It has a compact structure and can be installed in narrow spaces at the construction site. The second adapter module has a reserved test interface, which can facilitate testing of the gas-insulated equipment.

[0073] In addition, the detachable conductor can be removed from the first adapter module, which facilitates withstand voltage testing of gas-insulated switchgear.

[0074] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0075] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units or modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units, modules, or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection of modules or units may be electrical or other forms.

[0076] The units or modules described as separate components may or may not be physically separate. The components shown as units or modules may or may not be physical units or modules; that is, they may be located in one place or distributed across multiple network units or modules. Some or all of the units or modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0077] Furthermore, the functional units or modules in the various embodiments of this application can be integrated into one processing unit or module, or each unit or module can exist physically separately, or two or more units or modules can be integrated into one unit or module. The integrated units or modules described above can be implemented in hardware or in the form of software functional units or modules.

[0078] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A gas-insulated switchgear for connection to a first transformer (7), comprising a current transformer module (2), a grounding switch module (3), and a surge arrester module (4), characterized in that, It also includes a first adapter module (5) and a second adapter module (6). One end of the first adapter module (5) is configured to connect to the transformer direct connection module (8) located on the first transformer (7), and the other end is connected to the current transformer module (2). The second adapter module (6) is cross-shaped to form a first interface (61), a second interface (62), a third interface (63) and a fourth interface (64) facing four directions respectively. The end of the current transformer module (2) that is furthest from the first adapter module (5) is connected to the first interface (61). The grounding switch module (3) is connected to the second interface (62). The surge arrester module (4) is connected to the fourth interface (64). The third interface (63) is configured to have a first state and a second state, wherein in the first state, the third interface (63) is used to connect to the test equipment (9), and in the second state, the third interface (63) is closed by a sealing cover (65).

2. The gas-insulated switchgear according to claim 1, characterized in that, The first interface (61) and the third interface (63) are arranged opposite to each other, and the second interface (62) and the fourth interface (64) are arranged opposite to each other.

3. The gas-insulated switchgear according to claim 1, characterized in that, The first adapter module (5) includes a first adapter housing (51), a fixed conductor (52) and a detachable conductor (53). The fixed conductor (52) is connected to the main line of the gas-insulated switchgear (1), and the detachable conductor (53) is detachably connected between the fixed conductor (52) and the transformer direct connection module (8).

4. The gas-insulated switchgear according to claim 3, characterized in that, The detachable conductor (53) is bolted to the fixed conductor (52) and inserted into the transformer direct connection module (8) to achieve connection with the transformer direct connection module (8).

5. The gas-insulated switchgear according to claim 4, characterized in that, The detachable conductor (53) includes a cylindrical member (531) and a cup-shaped member (532). The cylindrical member (531) is connected to the fixed conductor (52) and the cup-shaped member (532) respectively by bolts. The cup-shaped member (532) is inserted into the connection slot (81) of the transformer direct connection module (8).

6. The gas-insulated switchgear according to claim 5, characterized in that, In the first state, the detachable conductor (53) is removed from between the fixed conductor (52) and the transformer direct connection module (8), and an insulating shield head (10) is connected to the end of the fixed conductor (52) for connection with the detachable conductor (53).

7. The gas-insulated switchgear according to claim 6, characterized in that, In the first state, the cylindrical member (531) is removed from between the fixed conductor (52) and the cup-shaped member (532), while the cup-shaped member (532) remains inserted in the connection slot (81).

8. The gas-insulated switchgear according to claim 7, characterized in that, The insulating shield head (10) is hemispherical in shape, with the planar portion of the hemisphere abutting the fixed conductor (52) and the curved portion of the hemisphere forming a free end.

9. The gas-insulated switchgear according to claim 6, characterized in that, The insulating shield head (10) is connected to the fixed conductor (52) by bolts.

10. The gas-insulated switchgear according to claim 1, characterized in that, The gas-insulated switchgear (1) includes a bracket (11) which is fixed to the ground, and the surge arrester module (4) is fixed on the bracket (11).

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