Optimization method of primary interface of air-insulated switch cabinet and air-insulated switch cabinet

Abstract

The invention discloses a method for optimizing a primary interface of an air-insulated switch cabinet and the air-insulated switch cabinet, and relates to the technical field of optimization of air-insulated switch cabinets. The structure of a copper bar used by a primary interface of an existing air insulation switch cabinet, the specifications of a main bus and a branch bus, the arrangement of a phase main bus, the arrangement of an overhead incoming line, an overhead outgoing line and a cabinet top bus, the specification of a primary grounding bar and the like are optimally designed, so that the safe operation of the air insulation switch cabinet can be ensured to the greatest extent; in addition, the universal interchange use of the air insulation switch cabinets produced by different manufacturers within a certain range and a certain period can be met at the same time, and the operation and maintenance convenience of the air insulation switch cabinets is improved.

Description

Technical Field

[0001] The invention relates to the technical field of air-insulated switch cabinet optimization, and in particular to an optimization method for a primary interface of an air-insulated switch cabinet and the air-insulated switch cabinet. Background Art

[0002] As a metal-enclosed switching power equipment, switchgear is widely used in power grids and has a wide impact. Its performance is of great significance to ensuring the reliability of power supply. The existing high-voltage switchgear has defects in structural design and electrical layout, and the manufacturing process also has many imperfections. It is easily affected by the environment and other factors during the installation and operation and maintenance stages. In actual operation, many safety issues are exposed, which seriously affects the safe and stable operation of the power grid. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the prior art and specifically provide an optimization method for a primary interface of an air-insulated switch cabinet and an air-insulated switch cabinet, as follows:

[0004] 1) In the first aspect, the present invention provides a method for optimizing a primary interface of an air-insulated switchgear, and the specific technical solution is as follows:

[0005] The sharp corners of each target copper busbar are spherically processed, wherein the target copper busbar refers to the copper busbar used for the primary interface of the air-insulated switchgear.

[0006] On the basis of the above scheme, the optimization method of the primary interface of the air-insulated switch cabinet of the present invention can also be improved as follows.

[0007] Furthermore, it also includes: determining the main bus and branch bus actually used by the primary interface of the air-insulated switchgear according to the current rating of the main bus and the current rating of the branch bus associated with the primary interface of the air-insulated switchgear.

[0008] Furthermore, the main busbars actually used in the primary interface of the air-insulated switchgear include: A-phase busbar, B-phase busbar and C-phase busbar, and the A-phase busbar, B-phase busbar and C-phase busbar are arranged in a triangular shape.

[0009] Furthermore, the air-insulated switchgear comprises an overhead incoming line, an overhead outgoing line and a busbar on the top of the cabinet, and the overhead incoming line, the overhead outgoing line and the busbar on the top of the cabinet all extend out of the cabinet top of the air-insulated switchgear.

[0010] Furthermore, it also includes: unifying the specifications of all primary grounding bars used in air-insulated switchgear.

[0011] Furthermore, it also includes: an opening for avoiding the bushing passing through the cabinet is provided on the cabinet body of the air-insulated switch cabinet.

[0012] Furthermore, it also includes: a channel steel for support is provided in the air-insulated switch cabinet.

[0013] Furthermore, the depth of the primary cable hole of the air-insulated switchgear shall not be less than 700 mm.

[0014] Furthermore, the air-insulated switchgear is a 40.5 kV air-insulated switchgear, and the cabinet depth of the 40.5 kV air-insulated switchgear is 2800 mm or 3100 mm.

[0015] 2) In a second aspect, the present invention further provides an optimized air-insulated switchgear obtained by any of the above-mentioned methods for optimizing the primary interface of an air-insulated switchgear.

[0016] The beneficial effects of the present invention are as follows:

[0017] By optimizing the structure of the copper busbar used in the primary interface of the existing air-insulated switchgear, the "specifications of the main busbar and branch busbar", the layout of the phase main busbar, the "layout of overhead incoming lines, overhead outgoing lines and cabinet-top busbar", the specifications of the primary grounding busbar, etc., the safe operation of the air-insulated switchgear can be guaranteed to the greatest extent, thereby ensuring the safe and stable operation of the power grid. Moreover, it can also meet the universal interchangeable use of air-insulated switchgear produced by different manufacturers within a certain range and a certain period of time, thereby improving the operation and maintenance convenience of the air-insulated switchgear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments of the present invention:

[0019] Figure 1 : A schematic flow chart of a method for optimizing a primary interface of an air-insulated switchgear according to an embodiment of the present invention;

[0020] Figure 2 : The rendering of the target copper busbar after spherical surface treatment;

[0021] Figure 3 : A schematic diagram of the structure of the target copper busbar after spherical surface treatment;

[0022] Figure 4 The following is a schematic diagram of the layout of overhead incoming lines, overhead outgoing lines and busbars on the top of the cabinet;

[0023] Figure 5 Figure 1: Schematic diagram of the structure of a primary grounding bus. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, a method for optimizing a primary interface of an air-insulated switch cabinet according to an embodiment of the present invention comprises the following steps:

[0027] S1. Perform spherical surface processing on the sharp corners of each target copper busbar 1, wherein the target copper busbar 1 refers to: a copper busbar used for a primary interface of an air-insulated switch cabinet.

[0028] Among them, the air-insulated switchgear is a 40.5kV air-insulated switchgear, and the cabinet depth of the 40.5kV air-insulated switchgear is 2800mm or 3100mm. Other specifications of air-insulated switchgear can also be selected according to actual conditions.

[0029] Among them, when processing the target copper busbar 1, the prepared target copper busbar 1 should be straightened and the cut surface should be flat. For the main busbar, branch busbar and equipment connection lines of the same arrangement, they should be symmetrical, horizontal and vertical, neat and beautiful. The busbar bending process should use cold bending, and hot bending is not allowed. The end shape of the main busbar inside the contact box is semi-circular arc, and a three-dimensional arc 2 is used for transition. When the current of the power grid system where the air-insulated switchgear is located is 1250A, the sharp corners of the target copper busbar 1 are spherically processed, and the radius of the arc 2 used for the spherical processing is 30mm; when the current of the power grid system where the air-insulated switchgear is located is 2500A, the radius of the arc 2 used for the spherical processing is 40mm. The busbar overlap and bending should comply with the requirements of GB50149-2010 "Construction and Acceptance Specifications for Busbar Installations in Electrical Installation Engineering".

[0030] like Figure 2 and Figure 3As shown, the main busbar lap hole 3 is designed as an oblong hole along the length direction of the main busbar. The aperture size of the oblong hole is determined by the specifications of the main busbar. When the width of the main busbar is 100mm, the aperture size of the oblong hole is: Ф17mm×20mm; when the width of the main busbar is 80mm, the aperture size is: Ф13×16mm. The position layout between multiple main busbar lap holes 3 is designed according to GB50149-2010 "Code for Construction and Acceptance of Busbar Installations in Electrical Installation Engineering", where K1=K2=row width / 2, K3=row width / 4, K1 represents: the center distance between two adjacent main busbar lap holes 3 in the same column, K2 represents: the center distance between two adjacent main busbar lap holes 3 in the same row, K3 represents: the vertical distance between the main busbar lap hole 3 closest to the edge of the target copper busbar 1 and the edge of the target copper busbar 1, Figure 5 The "row width" in the table means: the width of the target copper row 1.

[0031] Optionally, in the above technical solution, it also includes:

[0032] S2. Determine the main bus and branch bus actually used by the primary interface of the air-insulated switchgear according to the current rating of the main bus and the current rating of the branch bus associated with the primary interface of the air-insulated switchgear.

[0033] Among them, the rated current involved in the primary interface of the 40.5kV air-insulated switchgear includes: the current rating of the main bus and the current rating of the branch bus. The current rating of the main bus is determined according to the current in the power grid system where the 40.5kV air-insulated switchgear is located. When the current in the power grid system where the 40.5kV air-insulated switchgear is located is 1250A, the current rating of all main busbars is uniformly determined to be 1250A. When the current in the power grid system where the 40.5kV air-insulated switchgear is located is 2500A, the current rating of all main busbars is uniformly determined to be 2500A. The rated current value of the branch bus is determined by the power grid system where the 40.5kV air-insulated switchgear is located and the circuit breaker of the 40.5kV air-insulated switchgear.

[0034] The corresponding relationship between the specification parameters of the main busbar and branch busbar and the rated current value is shown in Table 1. The main busbar and branch busbar are both made of copper, the material is T2, the model is TMY, the cross-sectional shape of the main busbar and branch busbar is a full circular shape, and the size and tolerance requirements of the main busbar and branch busbar are in accordance with GB / T5585.1 Copper, aluminum and alloy busbars for electrical engineering Part 1: Copper and copper alloy busbars.

[0035] Table 1:

[0036] Rated current value (A) Specifications of main busbar (mm) Specifications of branch busbar (mm) 1250 80×10 60×12 2500 2-100×10 2-80×12

[0037] Optionally, in the above technical solution, the main busbars actually used in the primary interface of the air-insulated switchgear include: phase A busbar, phase B busbar, and phase C busbar, and the phase A busbar, phase B busbar, and phase C busbar are arranged in a triangular shape.

[0038] For the 40.5 kV air-insulated switchgear, the phase A busbar, phase B busbar, and phase C busbar are arranged in a triangular shape. The vertical distance between the center of the phase A busbar and the cabinet top is 325 mm, the horizontal distance between the center of the phase A busbar and the front side of the cabinet is 2000 mm, the phase C busbar is located 550 mm directly below the phase A busbar, the phase B busbar is at the same height as the phase A busbar and is located 500 mm to the left of the phase A busbar. From the front view of the 40.5 kV air-insulated switchgear, the phase sequence of the branch busbars connected to the handcart inside the cabinet is phase A, phase B, and phase C from left to right; when changing phases, the phase sequence of the branch busbars connected to the handcart inside the cabinet is phase C, phase B, and phase A from left to right; the main busbars and the bushing through the cabinet 4 are uniformly installed on the left side of the cabinet body of the 40.5 kV air-insulated switchgear. The main busbar fastening bolts should be designed to face the maintenance side of the 40.5 kV air-insulated switchgear.

[0039] Optionally, in the 40.5 kV air-insulated switchgear, the phase A busbar, phase B busbar, and phase C busbar are arranged in a "triangular" shape. The vertical distance between the center of the phase A busbar and the cabinet bottom is 945 mm, the horizontal distance between the center of the phase A busbar and the front side of the cabinet is 2400 mm, the phase C busbar is located 550 mm directly below the phase A busbar, the phase B busbar is at the same height as the phase A busbar and is located 460 mm to the left of the phase A busbar.

[0040] In the main busbar connection scheme of the 40.5 kV air-insulated switchgear, when the requirement for the net distance from the reserved connection point of the main busbar to the ground is less than ≥300 mm, equalizing shielding or insulation protection measures should be taken to meet the insulation requirements.

[0041] Optionally, in the above technical solution, the air-insulated switchgear includes an overhead incoming line 5, an overhead outgoing line 7, and a busbar on the cabinet top 6, and the overhead incoming line 5, the overhead outgoing line 7, and the busbar on the cabinet top 6 all extend out of the cabinet top of the air-insulated switchgear.

[0042] For the overhead incoming line 5, the overhead outgoing line 7, and the busbar on the cabinet top 6 (the busbar on the cabinet top 6 of the main transformer incoming breaker) in the 40.5 kV air-insulated switchgear, they can either extend out of the cabinet top through the bushing through the cabinet 4 or not use the bushing through the cabinet 4. As Figure 4 shown, when the bushing through the cabinet 4 extends out of the cabinet top, the vertical distance between the phase A busbar and the cabinet top and the phase C busbar and the cabinet top extending out of the cabinet top is both 400 mm, and the vertical distance between the phase B busbar and the cabinet top is 700 mm.

[0043] Optionally, in the above technical solution, it further includes:

[0044] S3. Standardize the specifications of all primary grounding bars used in air-insulated switchgear.

[0045] like Figure 5 As shown in the figure, the specifications of the primary grounding bar in the 40.5kV air-insulated switchgear are uniformly designed to be 40mm×8mm. The lap hole 8 of the primary grounding bar is designed to be an oblong hole along the length of the main busbar, with a hole diameter of Ф13mm×16mm, K4 is 40mm, and K5 is 20mm. K4 represents: the distance between two adjacent lap holes in the same row, and K5 represents: the vertical distance between the main busbar lap hole 3 closest to the edge of the primary grounding bar and the edge of the primary grounding bar, Figure 5 The "row width" means: the width of the primary grounding row, the vertical distance between the overlapping hole 8 of the primary grounding row and the bottom of the cabinet is 71.5mm, the horizontal distance between the overlapping hole 8 of the primary grounding row and the rear frame of the cabinet is 85mm, and the opening size of the overlapping hole is 65mm×30mm.

[0046] Optionally, the vertical distance between the center of the primary grounding bus in a 40.5kV air-insulated switch cabinet and the bottom of the cabinet is 64mm, the distance between the center of the overlapping hole 8 of the primary grounding bus and the side of the cabinet frame is 110mm, and the primary grounding connection bus between cabinets is overlapped by double holes with a length of 170mm.

[0047] Optionally, in the above technical solution, it also includes:

[0048] S4. An opening for avoiding the bushing 4 passing through the cabinet is provided on the right side of the cabinet body of the air-insulated switch cabinet.

[0049] To facilitate cabinet assembly, the right side of the 40.5kV air-insulated switchgear cabinet should be designed to avoid the opening of the cabinet bushing 4.

[0050] The upper edge of the main busbar opening is 135mm from the top of the cabinet, and the left edge of the opening is 1300mm from the front of the cabinet; the lower edge of the busbar opening is 205mm from the bottom of the cabinet, and the left edge of the opening is 1750mm from the front of the cabinet. In the horizontal direction, the main busbar opening size is 900mm, and the busbar opening size is 840mm; in the vertical direction, the main busbar opening size is 930mm, and the busbar opening size is 930mm. The small busbar room is designed to be arranged above the instrument room in front of the cabinet.

[0051] Optionally, the horizontal distance between the panel assembly hole at the front of the 40.5kV air-insulated switchgear and the front side of the cabinet body is 22.5 mm, and the horizontal distance between the panel assembly hole at the rear of the cabinet and the front side of the cabinet body is 22.5 mm.

[0052] The height dimensions of the cabinet holes in front of the cabinet from bottom to top are: 250mm, 200mm, 500mm, 350mm, 350mm, 350mm and 350mm. The height dimensions of the cabinet holes in the back of the cabinet from bottom to top are: 250mm, 200mm, 500mm, 350mm, 350mm, 350mm and 350mm.

[0053] From the perspective of the front of the cabinet, the cabinet nuts are arranged on the right side, and the cabinet nuts are arranged on the left side. The specifications of the cabinet nuts in front of the cabinet and the cabinet nuts in back of the cabinet are unified to M10.

[0054] Optionally, in the above technical solution, it also includes:

[0055] S5. Channel steel is provided in the air-insulated switch cabinet for support.

[0056] The foundation channel steel model of 40.5kV air-insulated switchgear is unified as 10#, and the channel steel is not higher than 5mm above the ground. An intermediate channel steel should be set to support the cabinet. To ensure that the installation of components in the cable room is not affected, the fixed position of the intermediate channel steel (the channel steel used for support) (the size between the rear edge of the channel steel and the front of the skeleton cabinet can be set according to actual conditions) is set in the front of the middle column, and the recommended size is 1350mm. In addition, the intermediate channel steel (supporting channel steel) only supports the cabinet and can be fixed to the cabinet without bolts.

[0057] Optionally, in the above technical solution, the depth of the primary cable hole of the air-insulated switchgear is not less than 700 mm.

[0058] The depth of the primary cable hole of the 40.5kV air-insulated switchgear shall not be less than 700mm. When the cabinet depth of the 40.5kV air-insulated switchgear is 2800mm, the distance between the center of the primary cable hole of the 40.5kV air-insulated switchgear and the rear frame is designed to be 450mm; when the cabinet depth of the 40.5kV air-insulated switchgear is 3100mm, the distance between the center of the primary cable hole of the 40.5kV air-insulated switchgear and the rear frame is designed to be 750mm.

[0059] The vertical distance between the cable connection terminal and the bottom of the 40.5kV air-insulated switch cabinet should be no less than 700mm. Cable connection should be made in the lower part of the cabinet, cable connection holes should be reserved, and a sealing plate for the cable inlet should be provided. The sealing plate should be composed of two non-magnetic metal sealing plates with a thickness of no less than 2mm, and should be easy to disassemble and assemble. A cable fixing bracket should be provided in the cable room.

[0060] Each phase of the main busbar in the cable room should be able to connect two outgoing cables. The current of the outgoing cables should not exceed 1250A. The specifications of the outgoing cables should meet the actual project requirements. The copper busbars connecting the outgoing cables all adopt double openings with an aperture size of Ф13mm. They are connected with M12 bolts. The distance between the center of the opening and the end of the copper busbar is 30mm, and the distance between the centers of the double holes is 40mm.

[0061] Optionally, in the above technical solution, the busbar bridge of the 40.5kV air-insulated switchgear includes a busbar bridge on the top of the cabinet and a busbar bridge between cabinets. Phase switching cannot be performed in the busbar bridge between cabinets of the 40.5kV air-insulated switchgear, and busbar phase switching is completed in the cabinet.

[0062] Optionally, the secondary grounding bar in the 40.5kV air-insulated switch cabinet is uniformly designed to be 30mm×4mm, and its mounting hole is designed to be an oblong hole along the length of the busbar, with a hole size of Ф11mm×14mm. The secondary grounding bar between 40.5kV air-insulated switch cabinets is overlapped by a single hole, and the length of the secondary grounding bar is 150mm.

[0063] Optionally, the vertical distance between the center of the secondary grounding bar in the 40.5kV air-insulated switch cabinet and the top of the cabinet is 155mm, the horizontal distance between the center of the secondary grounding bar in the 40.5kV air-insulated switch cabinet and the front side of the cabinet is 350mm, the distance between the center of the fixing hole of the secondary grounding bar in the 40.5kV air-insulated switch cabinet and the side of the cabinet frame is 50mm, and the secondary grounding bar between the 40.5kV air-insulated switch cabinets is overlapped by double holes, with a length of 170mm. The through hole size of the secondary grounding bar in the 40.5kV air-insulated switch cabinet is 50mm×12mm, and an insulating support needs to be installed. The vertical distance between the center of the through hole and the top of the cabinet is 155mm, and the horizontal distance between the center of the through hole and the front frame of the cabinet is 350mm. The aperture size of the secondary wire hole in the 40.5kV air-insulated switch cabinet is 50mm×105mm.

[0064] Optionally, for the secondary cable holes on the bottom plate of the switch cabinet, knock-out holes should be opened on both sides of the bottom plate and selected according to the needs of the site. The holes should meet all the secondary cable outlet requirements of the switch cabinet design requirements. Among them, the front edge of the secondary cable hole is designed to be 100mm along the front frame of the cabinet, the depth of the secondary cable hole is designed to be 200mm, and the width of the secondary cable hole is designed to be 50mm.

[0065] Optionally, the surface damage of air-insulated switchgear may be caused by a variety of factors, including corrosion from the external environment, decreased insulation resistance caused by accumulation of dust and water vapor, etc. When a discharge fault occurs in an air-insulated switchgear, the air insulating medium will produce a variety of gas decomposition products such as O3, NO2 and CO. The components and content of these decomposition products can reflect the severity of the discharge fault. Therefore, gas component analysis technology can be used to detect the gas components and content of the air inside the switchgear to determine whether there is damage or discharge on its surface. This method has the characteristics of non-contact, fast response and high accuracy.

[0066] In another embodiment, comprising:

[0067] S101. Use a high-resolution video camera or camera to photograph the surface of the air-insulated switchgear to ensure that the image is clear and complete and can accurately reflect the details and features of the switchgear surface.

[0068] S102, preprocessing the acquired image, specifically:

[0069] 1) Denoising: Since the shooting process may be affected by factors such as environmental noise and uneven lighting, the image needs to be denoised to improve image quality.

[0070] 2) Enhancement: In order to enhance the useful information in the image, the image can be processed by contrast enhancement, sharpening, etc. to make the damaged area more prominent.

[0071] 3) Grayscale: Converting a color image to a grayscale image can reduce the amount of computation while retaining the main features of the image.

[0072] S103, feature extraction:

[0073] 1) Use edge detection algorithms (such as Canny operator, Sobel operator, etc.) to extract edge information in the image. This edge information usually corresponds to the boundary of the damaged area.

[0074] 2) Perform texture analysis on the image to extract texture features of the damaged area, such as roughness, directionality, etc.

[0075] 3) If the damaged area has specific shape features (such as cracks, holes, etc.), shape analysis algorithms can be used to extract and identify them.

[0076] S104, setting labels according to the extracted features, the labels are divided into: damaged and undamaged, and then constructing a data set.

[0077] S105. According to the constructed data set, a machine learning algorithm (such as a support vector machine, a neural network, etc.) is trained, and then the trained machine learning algorithm is used to classify and identify the image of the air-insulated switchgear acquired in real time to determine whether there is damage. If so, an audible and visual alarm is issued.

[0078] Optionally, the Adam optimizer is used when training the model.

[0079] Optionally, to prevent the model from overfitting, in the Adam optimizer, you can add a weight decay term to further control the complexity of the model. This is achieved by adding a penalty term proportional to the weight size to the loss function.

[0080] Optionally, during the model training process, multiple similar weights are shared as one weight to reduce the number of model parameters and improve training efficiency, wherein all weights within a preset range of any weight are similar weights of that weight, and that weight is used as the shared weight, or the mean of all weights within the preset range of that weight is used as the shared weight.

[0081] The present invention also provides an optimized air-insulated switch cabinet obtained by any of the above-mentioned methods for optimizing the primary interface of an air-insulated switch cabinet.

[0082] In the above embodiments, although the steps are numbered S1, S2, etc., these are only specific embodiments given by the present invention. Those skilled in the art may adjust the execution order of S1, S2, etc. according to actual conditions, which is also within the protection scope of the present invention. It can be understood that in some embodiments, some or all of the above embodiments may be included.

[0083] In the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for optimizing the primary interface of an air-insulated switchgear, characterized in that: include: The sharp corners of each target copper busbar are spherically processed, wherein the target copper busbar refers to the copper busbar used for the primary interface of the air-insulated switch cabinet.

2. The method for optimizing the primary interface of an air-insulated switchgear according to claim 1, characterized in that: Also includes: The main bus and the branch bus actually used by the primary interface of the air-insulated switchgear are determined according to the current rating of the main bus and the current rating of the branch bus associated with the primary interface of the air-insulated switchgear.

3. The method for optimizing the primary interface of an air-insulated switchgear according to claim 2, characterized in that: The main busbars actually used by the primary interface of the air-insulated switchgear include: an A-phase busbar, a B-phase busbar and a C-phase busbar, and the A-phase busbar, the B-phase busbar and the C-phase busbar are arranged in a herringbone shape.

4. The method for optimizing the primary interface of an air-insulated switchgear according to claim 1, characterized in that: The air-insulated switch cabinet comprises an overhead incoming line, an overhead outgoing line and a cabinet-top busbar, and the overhead incoming line, the overhead outgoing line and the cabinet-top busbar all extend out of the cabinet top of the air-insulated switch cabinet.

5. The method for optimizing the primary interface of an air-insulated switchgear according to claim 1, characterized in that: Also includes: The specifications of all primary grounding bars used in the air-insulated switchgear are unified.

6. The method for optimizing the primary interface of an air-insulated switchgear according to claim 5, characterized in that: Also includes: The cabinet body of the air-insulated switch cabinet is provided with an opening for avoiding the bushing passing through the cabinet.

7. The method for optimizing the primary interface of an air-insulated switchgear according to claim 6, characterized in that: Also includes: Channel steel for support is arranged in the air-insulated switch cabinet.

8. The method for optimizing the primary interface of an air-insulated switchgear according to claim 6, characterized in that: The depth of the primary cable hole of the air-insulated switch cabinet is not less than 700 mm.

9. A method for optimizing a primary interface of an air-insulated switchgear according to any one of claims 1 to 8, characterized in that: The air-insulated switch cabinet is a 40.5 kV air-insulated switch cabinet, and the cabinet depth of the 40.5 kV air-insulated switch cabinet is 2800 mm or 3100 mm.

10. An optimized air-insulated switchgear obtained by the method for optimizing a primary interface of an air-insulated switchgear according to any one of claims 1 to 9.

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