500kV all-indoor transformer substation

Abstract

The utility model relates to the technical field of transformer substation structures, and discloses a 500kV all-indoor transformer substation which comprises 2N 500kV main transformers, the 2N 500kV main transformers are averagely divided into two groups, the first group of 500kV main transformers are arranged on the first side of a power distribution device building in a line, and the first group of 500kV main transformers are electrically connected with a first group of GIS equipment; the second group of 500kV main transformers are arranged on the second side of the power distribution device building in a line, and the second group of 500kV main transformers are electrically connected with the second group of GIS equipment; and the GIS equipment is arranged in the same large bay in the power distribution device building. The 500kV main transformers are arranged on the two sides of the GIS equipment in a pairwise face-to-face mode, the 500kV GIS equipment and the 220kV GIS equipment are arranged in the same large bay, and by optimizing the plane arrangement of the power distribution device, the mutual influence of different main transformer inlet wires can be reduced, the length of the GIS room is reduced, noise can reach the standard, and later expansion is facilitated.

Description

Technical Field

[0001] This application relates to the field of substation structure technology, and in particular to a 500kV fully indoor substation. Background Technology

[0002] In a 500kV power grid, the main challenges faced by 500kV substations include: limited land availability in urban centers, congested overhead line routes, and stringent urban design requirements. Fully indoor substations can effectively address these issues. Taking the Hefei Central Substation as an example, located in Luogang Ecological Park, adjacent to the Science and Technology Innovation CBD and echoing the Binhu International Convention and Exhibition Center, it is a crucial transit point for accessing the convention center and the CBD. Therefore, constructing a landscape-integrated, green, low-carbon, open, shared, and innovative fully indoor substation is an inevitable choice.

[0003] The southern part of Hefei currently has two 500kV substations, Feixi and Changlinhe. As the load in the southern part of Hefei increases, the existing substations are unable to meet the needs of the further development of the load in the area. The central substation is planned to have a transformer capacity of 4×1000MVA, 4 500kV cable outgoing lines, and 19 220kV cable outgoing lines.

[0004] In existing indoor substation layout schemes, the 500kV outgoing lines are overhead in schemes with 4 main transformers, while in schemes with 3 main transformers, both cable and overhead 500kV outgoing lines are used. This section will use the State Grid Corporation's general indoor substation design scheme 500-A2-1 as an example to describe existing conventional technical solutions.

[0005] like Figure 1 As shown, in the conventional 500-A2-1 scheme, three transformers are arranged in a row on one side of the power distribution building. The 500kV GIS equipment and the 220kV GIS equipment are located in different rooms, and the main transformers are connected to the GIS via oil and gas bushings on each side.

[0006] Those skilled in the art will understand that the existing linear arrangement scheme has the following disadvantages;

[0007] (1) In the conventional scheme, the transformer is located on one side of the GIS equipment, so as to Figure 1 For example, the 500kV GIS incoming line of main transformer No. 3 intersects with the 220kV GIS incoming line of main transformer No. 1, the 500kV GIS incoming line of main transformer No. 2, and the 220kV GIS incoming line of main transformer No. 2. If the scale of the main transformers increases, the intersection of GIS pipelines will also increase, the layout will be more complex, and the different main transformers will have a greater impact on each other. In addition, the pipelines are longer, the equipment costs will increase, and the economic efficiency will be lower.

[0008] (2) In the conventional scheme, the 500kV GIS equipment and the 220kV GIS equipment are arranged in two rooms. The side wall of the room in the width direction needs to be reserved for maintenance channels to the edge of the GIS equipment, which increases the length of the room.

[0009] (3) In the conventional scheme, three or more transformers are arranged in a row. After the transformer noise is superimposed, the acoustic environment at the substation boundary and the surrounding area is difficult to meet the requirements of the "Emission Standard for Environmental Noise at the Boundary of Industrial Enterprises" (GB 12348-2008) and the "Technical Guidelines for Environmental Impact Assessment - Acoustic Environment" (HJ2.4-2021).

[0010] (4) In the conventional scheme, when expanding the main transformer, the main transformer incoming line needs to cross the existing main transformer incoming line, which is difficult to construct and poses a safety risk.

[0011] Therefore, there is an urgent need for a new type of 500kV substation structure that can reduce the mutual influence between different main transformer incoming lines, reduce the length of the GIS room, facilitate noise compliance, and make it easier for future expansion. Utility Model Content

[0012] The purpose of this application is to provide a 500kV fully indoor substation, in which 500kV main transformers are arranged face-to-face on both sides of the GIS equipment, and the 500kV GIS equipment and 220kV GIS equipment are arranged in the same large open space. By optimizing the layout of the power distribution equipment, the mutual influence of different main transformer incoming lines can be reduced, the length of the GIS room can be reduced, which is conducive to achieving noise standards and facilitates future expansion.

[0013] The embodiments of this application disclose a 500kV fully indoor substation, including: 2N 500kV main transformers, where N is an integer greater than or equal to 1;

[0014] The 2N 500kV main transformers are divided into two groups. The first group of 500kV main transformers is arranged in a row on the first side of the power distribution building and is electrically connected to the first group of GIS equipment. The second group of 500kV main transformers is arranged in a row on the second side of the power distribution building and is electrically connected to the second group of GIS equipment. The first and second sides of the power distribution building are opposite each other, and the first and second groups of 500kV main transformers are arranged face to face.

[0015] The GIS equipment includes 500kV GIS equipment and 220kV GIS equipment. The GIS equipment is arranged in the same large open space in the power distribution equipment building. The first group of GIS equipment is arranged in a row on the first side of the large open space, and the second group of GIS equipment is arranged in a row on the second side of the large open space. The first side and the second side of the large open space are opposite each other, and the first group of GIS equipment and the second group of GIS equipment are arranged face to face.

[0016] The first side of the power distribution equipment building is adjacent to the first side of the large open space, and the second side of the power distribution equipment building is adjacent to the second side of the large open space.

[0017] In another preferred embodiment, the central axis of the first side and the second side of the power distribution equipment building is also the central axis of the first side and the second side of the large open space.

[0018] In another preferred embodiment, the first group of 500kV main transformers and the second group of 500kV main transformers are arranged in a mirror image with the central axis as the axis of symmetry.

[0019] In another preferred embodiment, the 500kV bushings and 220kV bushings of the 500kV main transformer are arranged in the same direction as the 500kV GIS equipment and the 220kV GIS equipment.

[0020] In another preferred embodiment, the 500kV GIS incoming line of the 500kV main transformer is arranged at a high position close to the 500kV GIS equipment, and no ground support is provided in the main transformer room and the large open space; instead, support components are installed on the side walls.

[0021] In another preferred embodiment, the 500kV GIS equipment is 1.7m away from the large open wall on its side and 2m away from the control cabinet side column of the 500kV GIS equipment.

[0022] In another preferred embodiment, the control cabinet of the 500kV GIS equipment is arranged in two rows between the first group of GIS equipment and the second group of GIS equipment.

[0023] In another preferred embodiment, the 500kV GIS equipment adopts a 3 / 2 connection with segments, and the 220kV GIS equipment adopts two sets of double busbar double segments connection.

[0024] In another preferred embodiment, the outgoing lines of the GIS equipment are equipped with disconnect switches, and the surge arresters and voltage transformers are built-in.

[0025] In another preferred embodiment, N = 2.

[0026] The main differences and effects of the implementation method of this application compared with the prior art are as follows:

[0027] The 500kV main transformers are arranged face-to-face on both sides of the GIS equipment. The 500kV GIS equipment and the 220kV GIS equipment are arranged in the same large open space. By optimizing the layout of the power distribution equipment, the mutual influence of different main transformer incoming lines can be reduced, the length of the GIS room can be reduced, which is conducive to achieving noise standards and facilitates future expansion.

[0028] Furthermore, by arranging the 500kV main transformers face-to-face on both sides of the GIS equipment, the GIS pipelines of the first group of 500kV main transformers do not cross or cross each other with the GIS pipelines of the second group of 500kV main transformers.

[0029] Furthermore, the first group of 500kV main transformers is arranged in a mirror image with the second group of 500kV main transformers, which reduces the crossing of the 500kV GIS incoming line and the 220kV GIS incoming line. The mutual influence between different main transformers is small, the layout is neat, and it is convenient for operation and maintenance.

[0030] Furthermore, the 500kV GIS equipment and the 220kV GIS equipment are arranged in the same large open space, which can share some passages and space, saving the area of ​​the GIS room.

[0031] Furthermore, by arranging the 500kV main transformers face to face in pairs, the noise superposition effect of the transformers at the plant boundary is small, which is conducive to achieving noise standards around the substation and at the plant boundary.

[0032] Furthermore, to facilitate future expansion, the 500kV main transformers are arranged face-to-face on both sides of the GIS equipment. The first and second sets of 500kV main transformers are constructed in their respective relatively independent areas, minimizing the impact on operating equipment and reducing construction safety risks.

[0033] Furthermore, the installation direction of the 500kV bushing and 220kV bushing of the 500kV main transformer is consistent with the arrangement direction of the 500kV GIS equipment and the 220kV GIS equipment, which further reduces the crossing of GIS incoming pipelines.

[0034] Furthermore, the 500kV GIS equipment control cabinets are arranged in two rows, between the first and second groups of GIS equipment. This avoids structural beams and does not occupy passageways. Compared to a single row of control cabinets, the cable length from the GIS equipment body to the control cabinet is shorter, and the control cabinets do not need to be removed when the circuit breaker arc-extinguishing chamber needs to be pulled out locally.

[0035] Furthermore, the GIS incoming pipeline of the 500kV main transformer is arranged at a high position, and all supports are set on the side walls, which can make more reasonable use of indoor space and does not affect the operation and maintenance access. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a plan layout scheme for a 500kV substation arranged in a straight line in the existing technology;

[0037] Figure 2 This is a schematic diagram of the plan layout of a 500kV fully indoor substation according to an embodiment of this application.

[0038] Figure 3 This is a schematic diagram of a preferred embodiment of a 500kV fully indoor substation layout scheme according to this application.

[0039] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of the main transformer room of a 500kV fully indoor substation.

[0040] Figure 5 yes Figure 3 The diagram shows a cross-sectional view of the 500kV GIS equipment in a 500kV fully indoor substation.

[0041] Figure 6 yes Figure 3 The cross-sectional view a of the 220kV GIS incoming line of the No. 3 main transformer of the 500kV indoor substation is shown.

[0042] Figure 7 yes Figure 3 The cross-sectional view (b) of the 220kV GIS incoming line of the No. 3 main transformer of the 500kV indoor substation is shown.

[0043] Figure 8 yes Figure 3 The cross-sectional view a of the 220kV GIS incoming line of the No. 4 main transformer of the 500kV indoor substation is shown.

[0044] Figure 9 yes Figure 3 The cross-sectional view (b) shows the 220kV GIS incoming line of the No. 4 main transformer of the 500kV indoor substation. Detailed Implementation

[0045] In the following description, numerous technical details are presented to facilitate the reader's understanding of this application. However, those skilled in the art will understand that the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0046] Explanation of some concepts:

[0047] GIS: An abbreviation for Gas Insulated Metal Enclosed Switchgear, which generally consists of circuit breakers, disconnecting switches, grounding switches, instrument transformers, surge arresters, busbars, and outgoing terminals. All of these devices or components are enclosed in a grounded metal casing filled with SF6 insulating gas.

[0048] A transformer is an electrical device that uses Faraday's law of electromagnetic induction to change alternating current (AC) voltage. It consists of two or more coils. When alternating current passes through the changing magnetic field of the primary coil, this magnetic field induces an electromotive force in the secondary coil. Depending on the turns ratio of the coils, the voltage between the primary and secondary coils is transformed.

[0049] In addition, in this article, "main transformer" and "main transformer" refer to the same concept.

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0051] The embodiments of this application relate to a 500kV fully indoor substation. Figure 2 This is a schematic diagram of the modular layout of the 500kV indoor substation.

[0052] Specifically, such as Figure 2 As shown, the 500kV indoor substation includes 2N 500kV main transformers, where N is an integer greater than or equal to 1.

[0053] In this embodiment, preferably, 2N 500kV main transformers are respectively installed in 2N main transformer rooms. Each 500kV main transformer includes 3 independent single-phase transformers, which are respectively identified as A, B, and C, or A phase, B phase, and C phase.

[0054] The 2N 500kV main transformers are divided into two groups. The first group of 500kV main transformers is arranged in a row on the first side of the power distribution building and is electrically connected to the first group of GIS equipment. The second group of 500kV main transformers is arranged in a row on the second side of the power distribution building and is electrically connected to the second group of GIS equipment. The first side and the second side of the power distribution building are opposite each other, and the first group of 500kV main transformers and the second group of 500kV main transformers are arranged face to face.

[0055] By arranging the 500kV main transformers face to face in pairs, the noise superposition effect of the transformers at the plant boundary is small, which is conducive to meeting the noise standards around the substation and at the plant boundary.

[0056] The GIS equipment includes 500kV GIS equipment and 220kV GIS equipment. The GIS equipment is arranged in the same large open space in the power distribution building. The first group of GIS equipment is arranged in a row on the first side of the large open space, and the second group of GIS equipment is arranged in a row on the second side of the large open space. The first side and the second side of the large open space are opposite each other, and the first group of GIS equipment and the second group of GIS equipment are arranged face to face.

[0057] By arranging the 500kV GIS equipment and the 220kV GIS equipment in the same large open space, they can share some passageways and space, thus saving GIS room area.

[0058] In this application, preferably, the 500kV GIS equipment adopts a 3 / 2 wiring with segments, and the 220kV GIS equipment adopts two sets of double busbar double segments wiring.

[0059] The first side of the power distribution equipment building is adjacent to the first side of the large open space, and the second side of the power distribution equipment building is adjacent to the second side of the large open space.

[0060] like Figure 2 As shown, in this embodiment, the first group of 500kV main transformers and the second group of 500kV main transformers are located on both sides of the GIS equipment (including: the first group of GIS equipment and the second group of GIS equipment). The GIS equipment is located between the first group of 500kV main transformers and the second group of 500kV main transformers. The 500kV main transformers are arranged face-to-face on both sides of the GIS equipment. The GIS pipelines of the first group of 500kV main transformers and the GIS pipelines of the second group of 500kV main transformers do not cross each other.

[0061] In addition, this technical solution facilitates future expansion. By arranging the 500kV main transformers face-to-face on both sides of the GIS equipment, the first and second sets of 500kV main transformers are constructed in their respective relatively independent areas, which minimizes the impact on operating equipment and reduces construction safety risks.

[0062] In this embodiment, preferably, the central axis of the first side and the second side of the power distribution equipment building is also the central axis of the first side and the second side of the large open space.

[0063] Furthermore, preferably, the first group of 500kV main transformers and the second group of 500kV main transformers are arranged in a mirror image with the central axis as the axis of symmetry. The first group of GIS equipment and the second group of GIS equipment are also arranged in a mirror image with the central axis as the axis of symmetry.

[0064] The first group of 500kV main transformers and the second group of 500kV main transformers are arranged in a mirror image. The first group of GIS equipment and the second group of GIS equipment are also arranged in a mirror image. This reduces the crossing of 500kV GIS incoming lines and 220kV GIS incoming lines, minimizes the mutual influence between different main transformers, and makes the layout neat and convenient for operation and maintenance.

[0065] In this embodiment, preferably, the 500kV bushings and 220kV bushings of the 500kV main transformer are arranged in the same direction as the 500kV GIS equipment and the 220kV GIS equipment, which further reduces the crossing of GIS incoming pipelines.

[0066] In this embodiment, preferably, the GIS incoming pipeline of the 500kV main transformer is arranged at a high position, and no ground support is set in the main transformer room and the large open space. Instead, support components are made on the side walls, which can make more reasonable use of the indoor space and does not affect the operation and maintenance access.

[0067] The 500kV GIS equipment is 1.7m away from the large open wall on its side and 2m away from the control cabinet side column of the 500kV GIS equipment, so that the distance on both sides of the GIS equipment meets the daily inspection needs of maintenance personnel.

[0068] In this embodiment, preferably, the 500kV GIS equipment control cabinets are arranged in two rows between the first group of GIS equipment and the second group of GIS equipment. This avoids structural beams and does not occupy passageways. Compared with a row of control cabinets, the cable length from the GIS equipment body to the control cabinet is shorter, and the control cabinets do not need to be removed when the circuit breaker arc-extinguishing chamber needs to be pulled out on-site.

[0069] In this embodiment, preferably, the outgoing line of the GIS equipment is equipped with a disconnect switch, and the surge arrester and voltage transformer are built-in. Although this involves more internal equipment than conventional GIS layout, it does not increase the width of the GIS room.

[0070] In summary, this application proposes a 500kV fully indoor substation structure with main transformers facing each other and a large open GIS bay. The 500kV main transformers are arranged face-to-face on both sides of the GIS equipment, and the 500kV GIS equipment and 220kV GIS equipment are arranged in the same large open bay. By optimizing the layout of the power distribution equipment, the mutual influence of different main transformer incoming lines can be reduced, the length of the GIS room can be reduced, which is conducive to achieving noise standards and facilitates future expansion.

[0071] To better understand the technical solution of this specification, a preferred embodiment will be described below. The details listed in this example are mainly for ease of understanding and are not intended to limit the scope of protection of this application.

[0072] This preferred embodiment proposes a 500kV fully indoor substation with main transformers facing each other and a large open GIS layout. In this preferred embodiment, N=2 will be used as an example, that is, there are a total of 4 1000MVA 500kV main transformers in this 500kV fully indoor substation. Figure 3 This is a schematic diagram of the floor plan layout of this preferred embodiment.

[0073] like Figure 3 As shown, this 500kV indoor substation can achieve a transformer capacity of 4×1000MVA, with 4 outgoing 500kV cables and 19 outgoing 220kV cables.

[0074] The first group of 500kV main transformers includes two 1000MVA 500kV main transformers, two 500kV cable outgoing lines, and ten 220kV cable outgoing lines. The two 500kV main transformers in the first group... Figure 3 The transformers are designated as #3 and #4, also known as Main Transformer No. 3 and Main Transformer No. 4. The 500kV GIS in the GIS equipment uses a 3 / 2 connection with sectionalization, while the 220kV GIS uses two sets of double busbar double-sectionalized connections. The second set of 500kV main transformers also includes two 1000MVA 500kV main transformers. Figure 3 The transformers are designated as #1 and #2, and are also referred to as: No.1 main transformer and No.2 main transformer.

[0075] In addition, such as Figure 3 As shown, the second 500kV main transformer and the second GIS equipment are also marked with the word "long-term vision," meaning that based on the first 500kV main transformer and the first GIS equipment, a future expansion (i.e., later expansion) will be carried out, adding the second 500kV main transformer and the second GIS equipment, thus forming a complete system. Figure 3 The 500kV indoor substation shown is shown.

[0076] Therefore, in this preferred embodiment, the first group of 500kV main transformers and the first group of GIS equipment are also referred to as current equipment, and the second group of 500kV main transformers and the second group of GIS equipment are also referred to as future equipment.

[0077] like Figures 3-9 As shown, the 500kV indoor substation of this preferred embodiment has the following structural features:

[0078] 1) The two main transformers in this phase are located on the west side of the station area, while the two main transformers in the future phase are located on the east side of the station area. The 500kV GIS and 220kV GIS are located between the main transformers in this phase and the future phase, and are arranged in a large open space. The 500kV GIS is located on the south side, and the 220kV GIS is located on the north side. The equipment in this phase and the future phase are arranged on both sides, and the pipelines of the future phase GIS do not intersect with the pipelines of this phase GIS. The construction of the future phase is in a relatively independent area, with low safety risks.

[0079] 2) The high-voltage bushings and medium-voltage bushings of the main transformers on the east and west sides are arranged in a mirror image. The 500kV bushings (high-voltage bushings) of the main transformers are all on the south side, and the 220kV bushings (medium-voltage bushings) are all on the north side, which is consistent with the GIS layout. Compared with the main transformer rotation layout, the mirror layout reduces the crossing of incoming pipelines.

[0080] 3) The 500kV incoming line is positioned high up near the 500kV GIS (Gas Grid System). No ground support is installed for the main transformer and GIS room; instead, support structures are installed on the side walls. The 500kV GIS equipment is approximately 1.7m from the wall separating the main transformer and GIS, and approximately 2m from the side column of the GIS control cabinet. The distances on both sides of the GIS meet the daily inspection needs of maintenance personnel. This solution includes disconnect switches for the GIS outgoing lines, and the surge arresters and voltage transformers are built-in. This arrangement includes more internal GIS equipment than conventional layouts, but does not increase the width of the GIS room.

[0081] 4) The 500kV GIS control cabinets are arranged in two rows, between the current GIS and the future GIS, while avoiding structural beams and not occupying passageways. Compared with a single row of control cabinets, the cable length from the GIS body to the control cabinet is shorter. Furthermore, when the circuit breaker arc-extinguishing chamber needs to be withdrawn locally, there is no need to remove the control cabinet.

[0082] 5) The 220kV GIS incoming line of main transformer No. 3 extends above the GIS room corridor to the vicinity of main transformer No. 3. After the three-phase distribution box, it enters the main transformer room at the C-phase position of main transformer No. 3 and is arranged along the side wall of the main transformer room. The 220kV GIS incoming line of main transformer No. 4 is arranged along the side wall of the GIS room. The center of the main channel pipeline is about 4.5m above the ground. After the three-phase distribution box at the C-phase bushing of main transformer No. 4, it is raised and enters the main transformer room, connecting with the main transformer bushing. The pipeline is arranged at a high level, and all supports are set on the side wall, so as not to affect the operation and maintenance passage. The incoming line of main transformer No. 3 is arranged above the corridor and in the main transformer room, while the incoming line of main transformer No. 4 is arranged in the GIS room, so they do not affect each other.

[0083] In summary, compared with the conventional linear layout, the layout of the 500kV indoor substation with the main transformers facing each other and the 500kV GIS and 220kV GIS in large open bays has the following advantages:

[0084] (1) The main transformers are arranged face-to-face on both sides of the GIS, which reduces the crossing of the 500kV GIS and the 220kV GIS. The different main transformers have little mutual influence, the layout is neat, and it is convenient for operation and maintenance.

[0085] (2) The 500kV GIS and 220kV GIS are arranged in a large open space, which can share some passages and space, saving the floor area and the area of ​​the GIS room.

[0086] (3) The main transformer is the largest noise source in the substation. The noise superposition effect of transformers arranged face-to-face at the plant boundary is small, which is conducive to the noise compliance of the substation and the plant boundary.

[0087] (4) Convenient for expansion. The current phase and the long-term equipment are arranged on both sides. The long-term expansion is in a relatively empty space, which has little impact on the operating equipment and low construction safety risk.

[0088] Finally, the technical solution of this application can be used as a typical layout module for the main transformer and GIS layout of indoor substations.

[0089] It should be noted that the components or devices mentioned in the various system implementations of this application are all logical modules. Physically, a logical module can be a physical module, a part of a physical module, or a combination of multiple physical modules. The physical implementation of these logical modules themselves is not the most important factor; rather, the combination of functions implemented by these logical modules is the key to solving the technical problem proposed in this application. Furthermore, to highlight the innovative aspects of this application, the above-described system implementations have not introduced components or devices that are not closely related to solving the technical problem proposed in this application. This does not mean that other components or devices do not exist in the above implementations.

[0090] It should be noted that in the claims and specification of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0091] Although this application has been illustrated and described with reference to certain preferred embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made thereto without departing from the spirit and scope of this application.

Claims

1. A 500kV fully indoor substation, characterized in that, include: 2N 500kV main transformers, where N is an integer greater than or equal to 1; The 2N 500kV main transformers are divided into two groups. The first group of 500kV main transformers is arranged in a row on the first side of the power distribution equipment building and is electrically connected to the first group of GIS equipment. The second group of 500kV main transformers is arranged in a row on the second side of the power distribution equipment building and is electrically connected to the second group of GIS equipment. The first side and the second side of the power distribution equipment building are opposite each other, and the first group of 500kV main transformers and the second group of 500kV main transformers are arranged face to face. The GIS equipment includes 500kV GIS equipment and 220kV GIS equipment. The GIS equipment is arranged in the same large open space in the power distribution building. The first group of GIS equipment is arranged in a row on the first side of the large open space, and the second group of GIS equipment is arranged in a row on the second side of the large open space. The first side and the second side of the large open space are opposite each other, and the first group of GIS equipment and the second group of GIS equipment are arranged face to face. The first side of the power distribution equipment building is adjacent to the first side of the large open space, and the second side of the power distribution equipment building is adjacent to the second side of the large open space.

2. The 500kV fully indoor substation according to claim 1, characterized in that, The central axis of the first side and the second side of the power distribution equipment building is also the central axis of the first side and the second side of the large open space.

3. The 500kV fully indoor substation according to claim 2, characterized in that, The first group of 500kV main transformers and the second group of 500kV main transformers are arranged in a mirror image with the central axis as the axis of symmetry.

4. The 500kV fully indoor substation according to claim 1, characterized in that, The 500kV bushings and 220kV bushings of the 500kV main transformer are arranged in the same direction as the 500kV GIS equipment and the 220kV GIS equipment.

5. The 500kV fully indoor substation according to claim 1, characterized in that, The GIS incoming pipeline of the 500kV main transformer is arranged at a high position, and no ground support is set in the main transformer room and the large open space. Instead, support components are installed on the side walls.

6. The 500kV fully indoor substation according to claim 1, characterized in that, The 500kV GIS equipment is 1.7m away from the large open wall on its side and 2m away from the control cabinet side column of the 500kV GIS equipment.

7. The 500kV fully indoor substation according to claim 1, characterized in that, The control cabinets of the 500kV GIS equipment are arranged in two rows, between the first group of GIS equipment and the second group of GIS equipment.

8. The 500kV fully indoor substation according to claim 1, characterized in that, The 500kV GIS equipment adopts a 3 / 2 connection with segments, and the 220kV GIS equipment adopts two sets of double busbar double segmented connections.

9. The 500kV fully indoor substation according to claim 1, characterized in that, The outgoing lines of the GIS equipment are equipped with disconnect switches, and the surge arresters and voltage transformers are built-in.

10. The 500kV fully indoor substation according to claim 1, characterized in that, The N=2.

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