500kV all-indoor transformer substation

Abstract

The invention 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] The present application relates to the technical field of substation structures, and in particular to a 500kV fully indoor substation. Background Art

[0002] In 500kV power grids, the main challenges facing 500kV substations include land shortages in urban centers, tight overhead line routes, and high urban interface requirements. Fully indoor substations can effectively address these issues. For example, the Hefei Central Substation is located in Luogang Ecological Park, adjacent to the Science and Technology Innovation CBD and directly connected to the Binhu International Convention and Exhibition Center. It is a must-go for accessing the convention center and the Science and Technology Innovation CBD. Building an integrated, fully indoor landscape substation that integrates with the landscape, is green and low-carbon, open and shared, and innovative and coordinated is an inevitable choice.

[0003] There are two 500kV substations in the southern area of ​​Hefei, namely Feixi and Changlinhe. As the load in the southern area of ​​Hefei increases, the existing substations are unable to meet the needs of further development of the load in this area. The central substation is planned to be built with a transformation capacity of 4×1000MVA, 4 500kV cable outgoing lines, and 19 220kV cable outgoing lines.

[0004] Among existing all-indoor deployment plans, those with four main transformers have overhead 500kV outgoing lines, while those with three main transformers have both overhead and cable connections. This article will describe existing conventional technical solutions using the State Grid Corporation of China's all-indoor station universal design, 500-A2-1, as an example.

[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 distribution equipment building. The 500kV GIS equipment and the 220kV GIS equipment are located in separate rooms, with each side of the main transformer connected to the GIS via oil and gas casing.

[0006] Those skilled in the art will appreciate that the existing in-line arrangement scheme has the following disadvantages:

[0007] (1) In the conventional scheme, the transformer is placed on one side of the GIS equipment. Figure 1 For example, the 500kV GIS line from the No. 3 main transformer intersects with the 220kV GIS line from the No. 1 main transformer, the 500kV GIS line from the No. 2 main transformer, and the 220kV GIS line from the No. 2 main transformer. As the main transformer scale increases, the number of GIS line intersections increases, making the layout more complex and significantly interfering between different main transformers. Furthermore, the longer the pipelines, the higher the equipment costs, and the lower the economic efficiency.

[0008] (2) In the conventional solution, 500kV GIS equipment and 220kV GIS equipment are arranged in two rooms. An operation and maintenance channel needs to be reserved from the side wall to the edge of the GIS equipment in the width direction of the room, 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 "Environmental Noise Emission Standard for Industrial Enterprise Boundaries" (GB 12348-2008) and the "Technical Guidelines for Environmental Impact Assessment of 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 main transformer incoming line in operation, which is difficult to construct and poses safety risks.

[0011] Therefore, there is an urgent need for a new type of 500kV substation structure that can reduce the mutual influence of different main transformer incoming lines, shorten the length of the GIS room, help meet noise standards, and facilitate future expansion. Summary of the Invention

[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 bay. By optimizing the plan layout of the distribution equipment, the mutual influence of different main transformer incoming lines can be reduced, the length of the GIS room can be shortened, which is conducive to meeting noise standards and facilitating future expansion.

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

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

[0015] The GIS equipment includes 500kV GIS equipment and 220kV GIS equipment, and the GIS equipment is arranged in the same large bay in the power distribution equipment building, wherein the first group of GIS equipment is arranged in a row on a first side of the large bay, and the second group of GIS equipment is arranged in a row on a second side of the large bay, the first side of the large bay and the second side of the large bay are opposite to 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 device building is adjacent to the first side of the large bay, and the second side of the power distribution device building is adjacent to the second side of the large bay.

[0017] In another preferred example, the central axis between the first side of the distribution device building and the second side of the distribution device building is also the central axis between the first side of the large bay and the second side of the large bay.

[0018] In another preferred example, 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 example, the arrangement direction of the 500kV bushing and the 220kV bushing of the 500kV main transformer is consistent with the arrangement direction of 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 the main transformer room and the large bay are not provided with ground supports, but support members are provided on the side walls.

[0021] In another preferred example, the distance between the 500kV GIS equipment and the large bay wall on the side where it is located is 1.7m, and the distance between the 500kV GIS equipment and the side column of the control cabinet is 2m.

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

[0023] In another preferred embodiment, the 500kV GIS equipment adopts 3 / 2 wiring with segmentation, and the 220kV GIS equipment adopts two sets of double-busbar double-segment wiring.

[0024] In another preferred embodiment, the outgoing line of the GIS equipment is equipped with a disconnector, a lightning arrester and a voltage transformer which are built-in.

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

[0026] Compared with the prior art, the main differences and effects of the embodiments of this application are:

[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 placed in the same large bay. By optimizing the plane layout of the distribution equipment, the mutual influence of different main transformer incoming lines can be reduced, the length of the GIS room can be shortened, which is conducive to meeting noise standards and facilitating 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 and the GIS pipelines of the second group of 500kV main transformers do not cross each other.

[0029] Furthermore, the first group of 500kV main transformers and the second group of 500kV main transformers are arranged in a mirror-image manner, reducing the cross-over of 500kV GIS incoming lines and 220kV GIS incoming lines. The mutual influence between different main transformers is small, and the layout is regular, which is convenient for operation and maintenance.

[0030] Furthermore, 500kV GIS equipment and 220kV GIS equipment are arranged in the same large bay, sharing some passages and spaces, thus saving GIS room area.

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

[0032] Furthermore, to facilitate future expansion, by arranging the 500kV main transformers face to face on both sides of the GIS equipment, the first group of 500kV main transformers and the second group of 500kV main transformers are constructed in their respective relatively independent areas, which has little impact on the operating equipment and reduces the construction safety risk.

[0033] Furthermore, the arrangement direction of the 500kV bushings and the 220kV bushings of the 500kV main transformer is consistent with the arrangement direction of the 500kV GIS equipment and the 220kV GIS equipment, further reducing the cross-over of the GIS incoming line pipelines.

[0034] Furthermore, 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, which can avoid structural beams and does not occupy the aisle. Compared with a row of control cabinets, the cable length from the GIS equipment body to the control cabinet is shorter, and when the arc extinguishing chamber of the circuit breaker needs to be pulled out on site, there is no need to dismantle the control cabinet.

[0035] Furthermore, the GIS incoming line 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 rational use of indoor space and does not affect the operation and maintenance channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of a plan layout scheme of a 500kV substation arranged in a row in the prior art;

[0037] Figure 2 This is a module schematic diagram of a planar layout of a 500kV fully indoor substation in an embodiment of the present application;

[0038] Figure 3 This is a schematic diagram of a plan layout of a 500kV fully indoor substation according to a preferred embodiment of the present application;

[0039] Figure 4 yes Figure 3 The cross-section of the main transformer room of the 500kV fully indoor substation is shown;

[0040] Figure 5 yes Figure 3 The cross-sectional view of the 500kV GIS equipment of the 500kV fully indoor substation is shown;

[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 fully 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 fully 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 fully indoor substation is shown;

[0044] Figure 9 yes Figure 3 The cross-sectional view b of the 220kV GIS incoming line of the No. 4 main transformer of the 500kV fully indoor substation is shown. DETAILED DESCRIPTION

[0045] In the following description, many technical details are provided to help readers better understand this application. However, those skilled in the art will understand that even without these technical details and the various changes and modifications based on the following embodiments, the technical solutions claimed in the claims of this application can be implemented.

[0046] Description of some concepts:

[0047] GIS: The abbreviation of gas-insulated metal-enclosed switchgear, which is generally composed of circuit breakers, disconnectors, earthing switches, transformers, lightning arresters, busbars and outgoing line terminals. These devices or components are all enclosed in a metal grounded casing and filled with SF6 insulating gas.

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

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

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

[0051] The embodiments of the present application relate to a 500kV fully indoor substation. Figure 2 This is a module diagram of the plan layout of the 500kV fully indoor substation.

[0052] Specifically, if Figure 2 As shown, the 500kV fully 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 arranged in 2N main transformer rooms, and each 500kV main transformer includes three independent single-phase transformers, which are marked as A, B, and C, or A phase, B phase, and C phase respectively.

[0054] The 2N 500kV main transformers are evenly divided into two groups, among which the first group of 500kV main transformers are arranged in a row on the first side of the distribution device building, and the first group of 500kV main transformers are electrically connected to the first group of GIS equipment; the second group of 500kV main transformers are arranged in a row on the second side of the distribution device building, and the second group of 500kV main transformers are electrically connected to the second group of GIS equipment. The first side of the distribution device building and the second side of the distribution device building are opposite to 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 superposition effect of transformer noise at the plant boundary is reduced, 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, and the GIS equipment is arranged in the same large bay in the distribution device building, wherein the first group of GIS equipment is arranged in a row on the first side of the large bay, and the second group of GIS equipment is arranged in a row on the second side of the large bay. The first side of the large bay is opposite to the second side of the large bay, and the first group of GIS equipment and the second group of GIS equipment are arranged face to face.

[0057] Placing 500kV GIS equipment and 220kV GIS equipment in the same large bay allows them to share some passages and space, saving GIS room area.

[0058] In the present application, preferably, the 500kV GIS equipment adopts 3 / 2 wiring with segmentation, and the 220kV GIS equipment adopts two sets of double-busbar double-segment wiring.

[0059] The first side of the power distribution device building is adjacent to the first side of the large bay, and the second side of the power distribution device building is adjacent to the second side of the large bay.

[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 respectively located on both sides of the GIS equipment (including: the first group of GIS equipment and the second group of GIS equipment), and the GIS equipment is located in the middle of 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, and 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 over.

[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 group of 500kV main transformers and the second group of 500kV main transformers are constructed in their respective relatively independent areas, which has little impact on the operating equipment and reduces the construction safety risk.

[0062] In this embodiment, preferably, the central axis of the first side of the distribution device building and the second side of the distribution device building is also the central axis of the first side of the large bay and the second side of the large bay.

[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 symmetry axis. 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 symmetry axis.

[0064] The first group of 500kV main transformers and the second group of 500kV main transformers are arranged in a mirror-image manner, and the first group of GIS equipment and the second group of GIS equipment are also arranged in a mirror-image manner, reducing the crossing of 500kV GIS incoming lines and 220kV GIS incoming lines. The mutual influence between different main transformers is small, and the layout is regular, which is convenient for operation and maintenance.

[0065] In this embodiment, preferably, the arrangement direction of the 500kV bushing and the 220kV bushing of the 500kV main transformer is consistent with the arrangement direction of the 500kV GIS equipment and the 220kV GIS equipment, further reducing the crossing of the GIS incoming line pipeline.

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

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

[0068] In this embodiment, preferably, 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, so as to avoid structural beams and not occupy passages. Compared with a row of control cabinets, the length of the cable from the GIS equipment body to the control cabinet is shorter, and when the arc extinguishing chamber of the circuit breaker needs to be pulled out on site, there is no need to dismantle the control cabinet.

[0069] In this embodiment, preferably, the outgoing line of the GIS equipment is equipped with a disconnector, a lightning arrester and a voltage transformer which are built-in. Although the number of internal devices is greater than that of a conventional GIS, the width of the GIS room is not increased.

[0070] In summary, this application proposes a 500kV fully indoor substation structure with main transformers facing each other and a large 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 bay. By optimizing the plane layout of the distribution device, 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 meeting noise standards and facilitating later expansion.

[0071] In order to better understand the technical solution of this specification, a preferred embodiment is 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 GIS bay. In this preferred embodiment, N=2 is used as an example, that is, there are a total of four 1000MVA 500kV main transformers in this 500kV fully indoor substation. Figure 3 It is a schematic diagram of the plan layout of the preferred embodiment.

[0073] like Figure 3 As shown, the 500kV fully indoor substation can reach a transformation capacity of 4×1000MVA, with 4 500kV cable outgoing lines and 19 220kV cable outgoing lines.

[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. Figure 3 The 500kV GIS in the GIS equipment adopts 3 / 2 connection with segmentation, and the 220kV GIS adopts two sets of double busbar double segmentation connection. The second set of 500kV main transformers also includes two 1000MVA 500kV main transformers. Figure 3 They are marked as: #1 main transformer and #2 main transformer, also known as: No. 1 main transformer and No. 2 main transformer.

[0075] In addition, if Figure 3 As shown in the figure, the second set of 500kV main transformers and the second set of GIS equipment are also marked with the word "Vision", which means: based on the first set of 500kV main transformers and the first set of GIS equipment, a vision expansion (i.e. later expansion) will be carried out, and the second set of 500kV main transformers and the second set of GIS equipment will be added, thus forming a Figure 3 The 500kV fully indoor substation shown.

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

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

[0078] 1) The two main transformers for the current phase are located on the west side of the station, while the two main transformers for the future phase are located on the east side. The 500kV GIS and 220kV GIS are located between the current phase and future phase main transformers, within a large bay. The 500kV GIS is located on the south side, and the 220kV GIS is located on the north side. The current phase and future phase equipment are located on either side, and the future phase GIS pipelines do not intersect with the current phase GIS pipelines. Construction of the future phase is carried out in a relatively isolated area, minimizing safety risks.

[0079] 2) The high-voltage and medium-voltage bushings of the east and west main transformers are arranged in a mirror-image manner. 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-image layout reduces the crossing of incoming line pipelines.

[0080] 3) The 500kV incoming line is located near the elevated 500kV GIS. Floor supports are not provided for the main transformer and GIS room, but rather 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 columns of the GIS control cabinet. This distance on both sides of the GIS meets the daily inspection requirements of operation and maintenance personnel. This solution incorporates disconnectors for the GIS outgoing line, and the lightning arrester and voltage transformer are built-in. This increases the number of internal GIS devices compared to conventional GIS layouts, without increasing the width of the GIS room.

[0081] 4) The 500kV GIS control cabinets are arranged in two rows, between the current and future GIS systems, avoiding structural beams and occupying aisles. Compared with a single row of control cabinets, the cable length from the GIS to the control cabinets is shorter. Furthermore, when the circuit breaker arc chambers need to be withdrawn locally, the control cabinets do not need to be removed.

[0082] 5) The 220kV GIS incoming line for the No. 3 main transformer extends along the GIS room walkway above the No. 3 main transformer to the vicinity of the No. 3 main transformer. After the three-phase split, it enters the main transformer room at the No. 3 main transformer C position and is routed along the main transformer room side wall. The 220kV GIS incoming line for the No. 4 main transformer is routed along the GIS room side wall, with the center of the main channel pipeline approximately 4.5m above the ground. After the three-phase split at the No. 4 main transformer C phase bushing, it is elevated and enters the main transformer room, where it is connected to the main transformer bushing. The pipeline is routed high, with all supports installed on the side walls to avoid obstructing operation and maintenance access. The No. 3 main transformer incoming line is routed above the walkway and in the main transformer room, while the No. 4 main transformer incoming line is routed in the GIS room, without interfering with each other.

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

[0084] (1) The main transformers are arranged face-to-face on both sides of the GIS, reducing the crossover between the 500kV GIS and the 220kV GIS. The mutual influence between different main transformers is small, and the layout is regular, which is convenient for operation and maintenance.

[0085] (2) 500kV GIS and 220kV GIS are arranged in a large bay, which can share some channels and spaces, saving floor space and GIS room area.

[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 factory boundary is small, which is conducive to meeting the noise standards around the substation and at the factory boundary.

[0087] (4) Expansion is convenient. The current and future equipment are arranged on both sides. The future expansion is located in a relatively empty area, which has little impact on the operating equipment and low construction safety risks.

[0088] Finally, the technical solution of the present application can be applied as a typical layout module to the layout of the main transformer and GIS in indoor substations.

[0089] It should be noted that the various 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. The combination of functions implemented by these logical modules is the key to solving the technical problems raised by this application. In addition, in order to highlight the innovative part of this application, the above-mentioned system implementations of this application do not introduce components or devices that are not closely related to solving the technical problems raised by this application. This does not mean that the above-mentioned implementations do not contain other components or devices.

[0090] It should be noted that in the claims and description of this patent, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0091] While the present application has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present 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 evenly divided into two groups, wherein the first group of 500kV main transformers are arranged in a row on the first side of the distribution device building and are electrically connected to the first group of GIS equipment; the second group of 500kV main transformers are arranged in a row on the second side of the distribution device building and are electrically connected to the second group of GIS equipment. The first side of the distribution device building and the second side of the distribution device building are opposite to 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, and the GIS equipment is arranged in the same large bay in the power distribution equipment building, wherein the first group of GIS equipment is arranged in a row on a first side of the large bay, and the second group of GIS equipment is arranged in a row on a second side of the large bay, the first side of the large bay and the second side of the large bay are opposite to 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 device building is adjacent to the first side of the large bay, and the second side of the power distribution device building is adjacent to the second side of the large bay.

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

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 arrangement direction of the 500kV bushings and the 220kV bushings of the 500kV main transformer is consistent with the arrangement direction of 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 line 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 bay, and the support members are made on the side wall.

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

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 and arranged 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 3 / 2 wiring with segmentation, and the 220kV GIS equipment adopts two sets of double-busbar double-segment wiring.

9. The 500kV fully indoor substation according to claim 1, characterized in that: The GIS equipment has an outgoing line with an isolating switch, and the lightning arrester and voltage transformer are built-in.

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

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