A shielding house for spark gap of high-voltage series compensation device

Abstract

This invention relates to a shielding room for spark gaps in high-voltage series compensation devices. Its innovation lies in the following: it includes a shielding room body comprising a main frame. The top of the main frame has a multi-layered curved roof structure. An upper pressure relief channel is provided at the connection between the main frame and the multi-layered curved roof structure. A lower pressure relief channel is provided at the bottom of the main frame. The bottom of the main frame has a protective support structure for achieving overall insulation of the spark gap to ground. The shielding room body also has a multi-path current-carrying unit that is connected in parallel with the protected equipment and used for bypass current flow. This invention provides multiple functions for high-voltage series compensation spark gaps, including electromagnetic shielding, protective support, current-carrying structure, and pressure relief channels. This provides an internal stable environment and external electromagnetic shielding for reliable operation of the spark gap, while also allowing for rapid depressurization of the gas inside the spark gap during fault current, thus improving the dynamic and thermal stability of the spark gap.

Description

Technical Field

[0001] This invention specifically relates to a shielding room for the spark gap of a high-voltage series compensation device, belonging to the field of power technology. Background Technology

[0002] High-voltage series compensation devices are an important component of flexible AC transmission technology, improving the dynamic and transient stability margins of the transmission system and playing a significant role in enhancing the transmission limits of transmission lines. Spark gaps serve as a rapid protection mechanism within high-voltage series compensation devices and are indispensable.

[0003] Current research on spark gaps is becoming more comprehensive and in-depth, with overall performance parameters continuously improving. This necessitates higher stability and reliability from shielded enclosures to ensure the safe operation of series compensation devices. Existing shielded enclosures struggle to further improve dynamic and thermal stability when subjected to fault currents exceeding 63kA for extended periods. Furthermore, while meeting the required protective performance, the rapid expulsion of instantaneously high-temperature, high-pressure gases generated inside the enclosure is difficult. In addition, there are higher demands for improved seismic resistance, current carrying capacity, and maintainability.

[0004] Existing spark gap shielding enclosures solely provide external shielding for spark gaps. Facing increasingly complex power grid environments, current technologies struggle to maintain the mechanical structure and electrical connections of spark gaps under high short-circuit fault current conditions. The shielding enclosures also cannot withstand the instantaneous high-temperature, high-pressure gases generated internally, nor can they rapidly depressurize these gases while ensuring environmental protection. The reliability requirements for spark gaps are extremely stringent, making them the most problematic component in high-voltage series compensation devices. There is an urgent need for new technologies with multiple functions to improve the overall performance and reliability of spark gaps. Summary of the Invention

[0005] The purpose of this invention is to provide a shielding room for the spark gap of a high-voltage series compensation device that simultaneously provides multiple functions such as electromagnetic shielding, protective support, current-passing structure, and pressure relief channel, so as to provide an internal stable environment and external electromagnetic shielding for reliable operation of the spark gap, while also allowing for rapid depressurization of the gas inside the spark gap during fault current, thereby improving the dynamic and thermal stability of the spark gap.

[0006] To achieve the above objectives, the technical solution of the present invention is: a shielding room for the spark gap of a high-voltage series compensation device, the innovation of which lies in: including a shielding room body, wherein the shielding room body includes a main frame for achieving electromagnetic shielding. The top of the main frame is equipped with a multi-layered curved roof structure to shield and protect against spark gaps. An upper pressure relief channel is provided at the connection between the main frame and the multi-layered curved roof structure, and a lower pressure relief channel is provided at the bottom of the main frame. The bottom of the main frame is equipped with a protective support structure for achieving overall insulation of the spark gap to ground. The shielded enclosure is also equipped with a multi-channel current-carrying unit that is connected in parallel with the protected equipment and used for bypassing to form path current flow.

[0007] In the above technical solution, the main frame is a cuboid structure, and it includes frame side bodies and a main skeleton. The main skeleton is composed of multiple horizontally arranged beams and multiple vertically arranged beams. The multiple beams and multiple vertical beams are arranged in an alternating manner to form a cuboid-shaped main support structure. The outer periphery of the main frame is provided with frame side bodies that are integrated with it.

[0008] In the above technical solution, the main frame is made of aluminum alloy, and the frame side is a cross-shaped aluminum frame, which is used to prevent mechanical damage caused by the electric force and the impact of the high-pressure gas of the electric arc when the spark gap is triggered instantaneously.

[0009] In the above technical solution, a central reinforcing plate is fixed at the center of the frame side body, so that the outer periphery of the main frame forms a central solid extending outward into a mesh frame structure, which is used to enhance the weak parts of the main frame in terms of dynamic and thermal stability. The cross-sectional shape of the central reinforcing plate is a symmetrical rectangular or circular shape.

[0010] In the above technical solution, the frame side body is provided with a single layer or multiple layers of shielding room skin for protection.

[0011] In the above technical solution, the multi-layer curved roof structure is a double-layer curved roof structure composed of an upper roof and a lower roof arranged vertically. The upper roof and the lower roof are spliced ​​or welded together by multiple fastening parts.

[0012] In the above technical solution, the upper roof is an outward-protruding structure that serves as a shield for the spark gap. The center of the lower roof extends outward in a curved manner from low to high, guiding the high-pressure gas during spark gap fault current to the upward pressure relief channel and discharging it to the outside.

[0013] In the above technical solution, a reinforcing structure is provided between the upper roof and the lower roof to improve the overall rigidity.

[0014] In the above technical solution, a water-blocking tray is provided at the lowest position of the center of the lower roof.

[0015] In the above technical solution, the outer peripheral surface of the water-blocking plate is conical and the bottom is a planar structure. The inner side of the water-blocking plate is attached to and fixedly connected to the curved surface of the lower roof. A water-blocking space is provided between its bottom and the lowest position of the lower roof to retain liquid water and prevent water vapor in the air from condensing into liquid water droplets on the lower roof and falling into the protected equipment, causing the spark gap to be falsely triggered.

[0016] In the above technical solution, the connection between the main frame and the multi-layer curved roof structure is provided with an eaves assembly to prevent rainwater and fog from entering the interior of the shielded room. The eaves assembly includes an outward-extending eave and a recessed rainproof eave. A side pressure relief mesh is provided between the outward-extending eave and the recessed rainproof eave. The side pressure relief mesh is connected to the interior of the shielded room and forms an upper pressure relief channel, so that the high-pressure gas during spark gap fault current can be released to the outside through the perforated structure of the side pressure relief mesh.

[0017] In the above technical solution, the bottom of the main frame is provided with a pressure relief mesh plate, which is connected to the interior of the shielded room and forms a pressure relief channel, so that the high-pressure gas during spark gap fault current flows through the shielded room and is released to the outside through the perforated structure of the pressure relief mesh plate.

[0018] In the above technical solution, the recessed rainproof eaves have a Z-shaped structure and are located close to the interior of the shielded room, forming an acute angle arrangement of less than 75° with the horizontally arranged side pressure relief mesh.

[0019] In the above technical solution, the protective support structure includes post insulators and metal bases. The bottom of the main frame is provided with multiple evenly arranged post insulators, and the post insulators are detachably connected to the metal bases.

[0020] In the above technical solution, the current-carrying unit includes a terminal block, an electrode assembly, and a wall bushing. The terminal block is located on the multi-layer curved roof structure, the electrode assembly is located inside the shielded room, and the wall bushing is located at the bottom of the shielded room and is in contact with the bottom of the electrode assembly. The external interface of the terminal block located outside the top of the shielded room and the bottom interface of the wall bushing are connected in parallel to the two ends of the protected equipment.

[0021] In the above technical solution, the shielded room is provided with two current flow paths. The current flows through the external interface of the wiring terminal located at the top of the shielded room, and then passes through the multi-layer curved roof structure and the main frame to connect with the bottom interface of the electrode assembly, and then passes through the wall sleeve to form current flow path 1. The current flows through the external whole of the wiring terminal inside the shielded room, and then passes through the water-blocking plate and the top interface of the electrode assembly, and then directly flows through the wall sleeve to form current flow path 2.

[0022] In the above technical solution, a right-angled L-shaped shield is provided at the corner of the multi-layer curved roof structure to serve to uniformly distribute the external electric field.

[0023] In the above technical solution, the four sides of the main frame are provided with lifting lugs to facilitate overall hoisting.

[0024] In the above technical solution, the bottom of the main frame is also provided with an inspection door that facilitates maintenance operations and improves the overall protective performance of the shielded room.

[0025] The positive effects of this invention are: after adopting the high-voltage series compensation device for spark gap shielding room of this invention, since this invention includes a shielding room body, the shielding room body includes a main frame for achieving electromagnetic shielding, The top of the main frame is equipped with a multi-layered curved roof structure to shield and protect against spark gaps. An upper pressure relief channel is provided at the connection between the main frame and the multi-layered curved roof structure, and a lower pressure relief channel is provided at the bottom of the main frame. The bottom of the main frame is equipped with a protective support structure for achieving overall insulation of the spark gap to ground. The shielded enclosure is also equipped with a multi-path current-carrying unit that is connected in parallel with the protected equipment and used for bypassing to form path current flow. In use, the capacitor and surge arrester of the protected equipment are connected in parallel with this invention. When a transmission line fault occurs, the surge arrester's overvoltage rises to a certain level, causing it to absorb a large amount of heat, which may lead to an explosion in severe cases. By triggering a spark gap, the capacitor can be bypassed within milliseconds, thereby ensuring the safety of the surge arrester and capacitor bank.

[0026] The advantages of this invention are: (1) The main frame of the present invention ensures that the spark gap does not suffer mechanical damage under the impact of electrodynamic force and high-pressure gas of the arc when subjected to fault current of 63kA or higher, thus improving the dynamic stability of the equipment. The main frame, together with the bottom protective support structure, not only provides the spark gap structure with high seismic resistance, but also forms multiple spark gap current paths with the current flow unit, realizing the multi-functionality of the structure.

[0027] (2) The roof structure at the top of the main frame of the present invention is a multi-layer curved roof structure, which can guide the high-pressure gas during spark gap fault current to the pressure relief channel and quickly discharge it to the outside, greatly improving the spark gap fault recovery capability and operational reliability.

[0028] (3) The multi-layer curved roof structure and shielding cover of the present invention can play a uniform external electric field role, effectively avoiding electric field distortion around the spark gap.

[0029] (4) The main frame of the present invention can also effectively block rainwater and fog from entering the interior of the shielded room, meet the protection requirements of the shielded room, and also improve the overall maintainability. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural schematic diagram of a specific embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the internal structure of the shielded room; Figure 3 This is a front view of the external structure of the present invention; Figure 4 yes Figure 3 Top view; Figure 5 This is a bottom view of the main frame of the invention; Figure 6 This is a schematic diagram of the rapid depressurization of the internal high-pressure gas in this invention; Figure 7 This is a schematic diagram of the two flow paths of the present invention; In the diagram: 1. Cross-shaped aluminum frame; 101. Central reinforcing plate; 2. Horizontal beam; 3. Vertical beam; 4. Lower roof; 5. Upper roof; 6. Terminal block; 7. Extended eaves; 8. Side pressure relief mesh plate; 9. Recessed rainproof eaves; 10. Lifting lug; 11. Shielding room skin; 12. Shielding cover; 13. Inspection door; 14. Post insulator; 15. Metal base; 16. Water-blocking junction plate; 17. Electrode assembly; 18. Through-wall sleeve; 19. Lower pressure relief mesh plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] like Figure 1 , 2As shown in Figures 3, 4, 5, 6, and 7, a shielding room for the spark gap of a high-voltage series compensation device includes a shielding room body, wherein the shielding room body includes a main frame for achieving electromagnetic shielding. The top of the main frame is equipped with a multi-layered curved roof structure to shield and protect against spark gaps. An upper pressure relief channel is provided at the connection between the main frame and the multi-layered curved roof structure, and a lower pressure relief channel is provided at the bottom of the main frame. The bottom of the main frame is equipped with a protective support structure for achieving overall insulation of the spark gap to ground. The shielded enclosure is also equipped with a multi-channel current-carrying unit that is connected in parallel with the protected equipment, used for bypass discharge, and forms a path for current flow.

[0034] Furthermore, such as Figure 2 , 3 As shown, in order to make the structure more reasonable, play a major structural support role in the shielded room, and be easy to assemble, the main frame is a cuboid structure, which includes a frame side body 1 and a main skeleton. The main skeleton is composed of multiple horizontally arranged beams 2 and multiple vertically arranged beams 3. The multiple beams 2 and multiple vertical beams 3 are arranged in an alternating manner to form a cuboid-shaped main support structure. The outer periphery of the main frame is provided with a frame side body 1 that is integrated with it.

[0035] Furthermore, such as Figure 2 As shown, to achieve a lightweight overall structure, the main frame is made entirely of aluminum alloy, and the frame side 1 is a cross-shaped aluminum frame to prevent mechanical damage to the spark gap during instantaneous triggering due to electrodynamic force and the impact of high-pressure gas from the arc. In other words, the lightweight materials and cross-shaped structure used in this invention improve the high seismic resistance of the high-voltage series-compensated spark gap structure and also meet the current-carrying capacity of the spark gap under high current conditions.

[0036] Furthermore, such as Figure 2 As shown, in order to enhance the weak points of the shielded room's dynamic and thermal stability, a central reinforcing plate 101 is fixed at the center of the frame side body 1, so that the outer periphery of the main frame forms a central solid extending outward into a mesh frame structure, which is used to enhance the weak parts of the main frame's dynamic and thermal stability and improve the shielded room's fault current withstand capability to more than 63kA. The cross-sectional shape of the central reinforcing plate 101 is a symmetrical rectangular or circular shape.

[0037] Furthermore, such as Figure 3As shown, in order to protect the main frame and facilitate maintenance and disassembly, the frame side body 1 is provided with a single or multiple layer of shielding room skin 11 for protection. The shielding room skin 11 is installed on the main frame composed of the cross-shaped aluminum frame, the horizontal beam 2 and the vertical beam 3 by bolts. The shielding room skin can be implemented in single or multiple layers according to the pressure of the high-pressure gas it withstands.

[0038] Furthermore, such as Figure 2 , 6 As shown in Figure 7, in order to enhance the shielding and protection effect of the spark gap, the multi-layer curved roof structure is a double-layer curved roof structure composed of an upper roof 5 and a lower roof 4 arranged vertically. The upper roof 5 and the lower roof 4 are spliced ​​or welded together by multiple fastening parts.

[0039] Furthermore, such as Figure 2 , 6 As shown in Figures 7 and 8, the upper roof 5 is an outward-protruding structure that serves as a shield for the spark gap. The center of the lower roof 4 extends outward in a curved manner from low to high, guiding the high-pressure gas during the spark gap fault current to the upward pressure relief channel and discharging it to the outside.

[0040] Furthermore, in order to enhance the overall structural strength of the roof, the present invention provides a reinforcing structure between the upper roof 5 and the lower roof 4 to improve the overall rigidity.

[0041] Furthermore, such as Figure 2 , 6 As shown in Figures 7 and 8, a conical water-blocking plate 16 is provided at the lowest position of the center of the lower roof 4 and at the lowest position of the wiring terminal to retain liquid water and prevent water vapor in the air from condensing into liquid water droplets on the lower roof and falling into the spark gap device, causing the spark gap to be falsely triggered.

[0042] Furthermore, such as Figure 2 , 6 As shown in Figure 7, in order to leave a water-blocking space, the outer peripheral surface of the water-blocking plate 16 is conical and the bottom is a flat structure. The inner side of the water-blocking plate 16 is attached to and fixedly connected to the curved surface of the lower roof 4. This can prevent the high-temperature and high-pressure gas from escaping upward and outward when the spark gap is triggered. In addition, a water-blocking space is provided between its bottom and the lowest position of the lower roof 4 to retain liquid water and prevent water vapor in the air from condensing into liquid water droplets on the lower roof 4 and falling into the protected equipment, causing the spark gap to be falsely triggered.

[0043] Furthermore, such as Figure 2As shown, in order to construct the main pressure relief channel of the shielded room and form pressure relief channels around the shielded room, an eaves assembly is provided at the connection between the main frame and the multi-layer curved roof structure to prevent rainwater and rain fog from entering the interior of the shielded room. The eaves assembly includes an outward eaves 7 and a concave rainproof eaves 9. A side pressure relief mesh plate 8 is provided between the outward eaves 7 and the concave rainproof eaves 9. The side pressure relief mesh plate 8 is connected to the interior of the shielded room and forms an upper pressure relief channel, so that the high-pressure gas during spark gap fault current can be released to the outside through the perforated structure of the side pressure relief mesh plate 8.

[0044] Furthermore, the recessed rainproof eaves 9 have a Z-shaped structure and are located close to the interior of the shielded room, forming an acute angle arrangement of less than 75° with the horizontally arranged side pressure relief mesh plates 8.

[0045] Furthermore, the lower roof 4 cooperates with the extended eaves 7 to guide the high-pressure gas during spark gap fault current from top to bottom and release pressure to the outside.

[0046] Furthermore, such as Figure 5 , 6 As shown, in order to achieve multi-channel pressure relief and improve rapid pressure relief efficiency, the bottom of the main frame is provided with a pressure relief mesh plate 19, and the pressure relief mesh plate 19 is connected to the interior of the shielded room and forms a pressure relief channel, so that the high-pressure gas during spark gap fault current flows through the shielded room and is relieved to the outside through the perforated structure of the pressure relief mesh plate 19.

[0047] Furthermore, such as Figure 1 , 2 As shown in Figures 3, 6, and 7, in order to achieve overall insulation of the spark gap to the ground, the protective support structure includes a post insulator 14 and a metal base 15. The bottom of the main frame is provided with multiple evenly arranged post insulators 14 and metal base 15 that are detachably connected.

[0048] Furthermore, such as Figure 7 As shown, the current-carrying unit includes a terminal block 6, an electrode assembly 17, and a wall sleeve 18. The terminal block 6 is located on the multi-layer curved roof structure, the electrode assembly 17 is located inside the shielded room, and the wall sleeve 18 is located at the bottom of the shielded room and is attached to the bottom of the electrode assembly 17. The external interface of the terminal block 6 located outside the top of the shielded room and the bottom interface of the wall sleeve 18 are connected in parallel to the two ends of the protected equipment.

[0049] Furthermore, such as Figure 7As shown, in order to improve current flow efficiency and performance, the shielded room is provided with two current flow paths. The current flows through the external interface of the terminal 6 located outside the top of the shielded room, and then connects to the bottom interface of the electrode assembly 17 through the multi-layer curved roof structure and the main frame in sequence, and then passes through the wall sleeve 18 to form current flow path 1. The current flows through the external whole of the terminal 6 inside the shielded room, and then passes through the water-blocking plate 16 and the top interface of the electrode assembly 17 in sequence, and then directly flows through the wall sleeve 18 to form current flow path 2.

[0050] Furthermore, such as Figure 3 As shown, right-angled L-shaped shielding covers 12 are provided at the corners of the multi-layered curved roof structure to serve to uniformly distribute the external electric field. The L-shaped shielding covers 12 are arranged at approximately 90° to the four corners of the shielded room.

[0051] Furthermore, such as Figure 3 As shown, in order to facilitate the overall hoisting of the spark gap, the four sides of the main frame are provided with lifting lugs 10 for easy overall hoisting.

[0052] Furthermore, such as Figure 5 As shown, to facilitate maintenance personnel entering the shielded room for internal inspection and repair, the bottom of the main frame is also equipped with an inspection door 13, which facilitates inspection and repair and enhances the overall protective performance of the shielded room. Furthermore, the inspection door 13 is located on the lower pressure relief mesh plate 19. Alternatively, it can be located on the side of the shielded room.

[0053] The working process of this invention: In high-voltage series compensation systems, surge arresters and capacitor banks are often connected in parallel to form capacitor voltage limiting protection. That is, the external interface of the terminal block 6 located outside the top of the shielded room and the bottom interface of the through-wall bushing 18 are connected in parallel to the two ends of the protected equipment.

[0054] When a power grid line fault occurs, the overvoltage on the surge arrester rises to a certain level, causing the arrester to absorb a large amount of heat, which may lead to an explosion in severe cases. The spark gap shielding room of this invention is configured to protect the surge arrester and the capacitor of the high-voltage series compensation device.

[0055] When no fault occurs, the spark gap shielding room provides external electromagnetic shielding and reliable protection for the spark gap, preventing environmental factors from causing accidental triggering of the spark gap and affecting the normal operation of the power grid. When a capacitor fails or is subjected to excessive current, the spark gap is triggered, forming the two current flow paths mentioned above. This can bypass the capacitor within milliseconds. At the same time, the shielding room itself withstands the high-temperature and high-pressure gas generated by the fault current arc and quickly releases the pressure, ensuring the normal operation of the equipment.

[0056] (1) The frame of this invention forms a central solid extending outward mesh aluminum frame structure on four sides, which ensures that the spark gap does not suffer mechanical damage under the impact of electrodynamic force and high-pressure gas of the arc when subjected to fault current of 63kA or higher, thus improving the dynamic stability of the equipment. The lightweight integral frame, together with the bottom insulator and base, not only provides the spark gap structure with high shock resistance, but also, together with the wiring terminals and internal electrode components, provides two current-carrying paths for the spark gap, realizing the multi-functionality of the structure.

[0057] (2) The roof structure of the shielding room of the present invention is a multi-layer structure, wherein the lower roof structure extends from the center of the shielding room outward from the periphery in a curved manner from low to high, guiding the high-pressure gas during spark gap fault current to the pressure relief channel for rapid discharge to the outside. A water blocking plate is provided to prevent the condensed liquid water droplets from causing the spark gap to be falsely triggered, thereby greatly improving the spark gap fault recovery capability and operational reliability.

[0058] (3) The shielding room of the present invention has right-angled L-shaped shielding covers arranged at the four corners of the top, which play a uniform external electric field role on the top of the shielding room and effectively avoid electric field distortion around the spark gap.

[0059] (4) The four-sided skin, eaves, and rainproof eaves of this invention effectively prevent rainwater and fog from entering the shielded room, meeting the protection requirements of the shielded room. At the same time, the lifting lugs and maintenance doors set in the frame structure improve the overall maintainability.

[0060] In summary, the shielding room for the spark gap in the high-voltage series compensation device of this invention not only provides excellent protection and shielding for the spark gap, but also significantly improves the spark gap's seismic resistance and dynamic-thermal stability through its high-strength structure and multiple flow paths. The special internal flow-guiding structure, combined with the pressure relief channel, allows for the rapid discharge of high-pressure gas generated by the arc after the spark gap is triggered, enhancing overall reliability. The shielding room also prioritizes maintainability, features a rational layout, and is compact and multifunctional, thus improving its overall performance.

[0061] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A shield house for a spark gap of a high voltage series compensation device, characterized by: It includes a shielded enclosure, which comprises a main frame for achieving electromagnetic shielding. The top of the main frame is equipped with a multi-layered curved roof structure to shield and protect against spark gaps. An upper pressure relief channel is provided at the connection between the main frame and the multi-layered curved roof structure, and a lower pressure relief channel is provided at the bottom of the main frame. The bottom of the main frame is equipped with a protective support structure for achieving overall insulation of the spark gap to ground. The shielded enclosure is also equipped with a multi-channel current-carrying unit that is connected in parallel with the protected equipment and used for bypassing to form path current flow.

2. The shield room for spark gap of high voltage series compensation device according to claim 1, characterized in that: The main frame is a cuboid structure, and it includes a frame side body (1) and a main skeleton. The main skeleton is composed of multiple horizontally arranged beams (2) and multiple vertically arranged beams (3). The multiple beams (2) and multiple vertical beams (3) are arranged in an alternating manner to form a cuboid-shaped main support structure. The outer periphery of the main frame is provided with a frame side body (1) that is integrated with it.

3. The shielding room for the spark gap of the high-voltage series compensation device according to claim 2, characterized in that: The main frame is made of aluminum alloy, and the frame side (1) is a cross-shaped aluminum frame, which is used to prevent mechanical damage caused by the electric power and high-pressure gas impact of the electric arc when the spark gap is triggered instantaneously.

4. The shielding room for the spark gap of the high-voltage series compensation device according to claim 2, characterized in that: A central reinforcing plate (101) is fixed at the center of the frame side body (1), so that the outer periphery of the main frame forms a central solid extending outward into a mesh frame structure, which is used to enhance the weak parts of the main frame in terms of dynamic and thermal stability. The cross-sectional shape of the central reinforcing plate (101) is a rectangular or circular symmetrical shape.

5. The shielding room for the spark gap of the high-voltage series compensation device according to claim 2, characterized in that: The frame side body (1) is provided with a single or multiple layers of shielding room skin (11) for protection.

6. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The multi-layer curved roof structure is a double-layer curved roof structure consisting of an upper roof (5) and a lower roof (4) arranged vertically. The upper roof (5) and the lower roof (4) are spliced ​​or welded together by multiple fastening parts.

7. The shielding room for the spark gap of the high-voltage series compensation device according to claim 6, characterized in that: The upper roof (5) is an outward-protruding structure that serves as a shield for the spark gap. The center of the lower roof (4) extends outward from low to high in a curved manner, guiding the high-pressure gas during the spark gap fault current to the upper pressure relief channel and outward.

8. The shielding room for the spark gap of the high-voltage series compensation device according to claim 6, characterized in that: A reinforcing structure is provided between the upper roof (5) and the lower roof (4) to enhance the overall rigidity.

9. The shielding room for the spark gap of the high-voltage series compensation device according to claim 6, characterized in that: A water-blocking plate (16) is provided at the lowest position of the center of the lower roof (4).

10. The shielding room for the spark gap of the high-voltage series compensation device according to claim 9, characterized in that: The outer periphery of the water-blocking plate (16) is conical, and the bottom is a flat structure. The inner side of the water-blocking plate (16) is attached to and fixedly connected to the curved surface of the lower roof (4). A water-blocking space is provided between its bottom and the lowest position of the lower roof (4) to retain liquid water and prevent water vapor in the air from condensing into liquid water droplets on the lower roof (4) and falling into the protected equipment, causing the spark gap to be falsely triggered.

11. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The connection between the main frame and the multi-layer curved roof structure is provided with an eaves assembly to prevent rainwater and fog from entering the shielded room. The eaves assembly includes an outward eaves (7) and a recessed rainproof eaves (9). A side pressure relief mesh plate (8) is provided between the outward eaves (7) and the recessed rainproof eaves (9). The side pressure relief mesh plate (8) is connected to the interior of the shielded room and forms an upper pressure relief channel, so that the high-pressure gas during spark gap fault current can be released to the outside through the perforated structure of the side pressure relief mesh plate (8).

12. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The bottom of the main frame is provided with a pressure relief mesh plate (19), and the pressure relief mesh plate (19) is connected to the interior of the shielded room and forms a pressure relief channel, so that the high pressure gas during the spark gap fault current flows through the shielded room and is depressurized to the outside through the hole structure of the pressure relief mesh plate (19).

13. The shielding room for the spark gap of the high-voltage series compensation device according to claim 11, characterized in that: The recessed rainproof eaves (9) are Z-shaped structures and are located close to the interior of the shielded room, forming an acute angle arrangement of less than 75° with the horizontally arranged side pressure relief mesh (8).

14. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The protective support structure includes a post insulator (14) and a metal base (15). The bottom of the main frame is provided with multiple evenly arranged post insulators (14), and the post insulators (14) and the metal base (15) are detachably connected.

15. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The current-carrying unit includes a terminal block (6), an electrode assembly (17), and a wall sleeve (18). The terminal block (6) is located on the multi-layer curved roof structure. The electrode assembly (17) is located inside the shielded room. The wall sleeve (18) is located at the bottom of the shielded room and is attached to the bottom of the electrode assembly (17). The external interface of the terminal block (6) located outside the top of the shielded room and the bottom interface of the wall sleeve (18) are connected in parallel at both ends of the protected equipment.

16. The shielding room for the spark gap of the high-voltage series compensation device according to claim 15, characterized in that: The shielded room has two current flow paths. The current flows through the external interface of the terminal (6) located outside the top of the shielded room, and then through the multi-layer curved roof structure and the main frame to the bottom interface of the electrode assembly (17) to form current flow path 1 via the wall sleeve (18). The current flows through the external whole of the terminal (6) inside the shielded room, and then through the top interface of the water blocking plate (16) and the electrode assembly (17) to directly flow through the wall sleeve (18) to form current flow path 2.

17. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The corners of the multi-layer curved roof structure are provided with right-angled L-shaped shields (12) to serve to uniformly distribute the external electric field.

18. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The main frame is provided with lifting lugs (10) on all four sides to facilitate overall hoisting.

19. The shielding room for the spark gap of the high-voltage series compensation device according to claim 1, characterized in that: The bottom of the main frame is also provided with an inspection door (13) that facilitates maintenance operations and improves the overall protective performance of the shielded room.

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