Modular static var generator cabinet structure

Abstract

The application belongs to the field of reactive generator cabinet, and discloses a modular static reactive generator cabinet structure, which comprises a plurality of cabinet bodies which are assembled in insulation communication through insulators; an accommodating cavity for mounting an SVG power module is formed in the cabinet body, and a ventilation and heat dissipation assembly which is in and out from bottom to top is arranged in a matched mode; in use, the passive natural ventilation and heat dissipation assembly which is in and out from bottom to top is adopted to replace the existing water cooling and fan forced air cooling mode; at the same time, relying on the airflow velocity variation, the airflow difference between normal working conditions and fire conditions realizes passive mechanical triggering fire prevention, and temperature sensors, controllers and other electric control elements are not needed, so that the defects of easy false triggering and power failure of electric control triggering are avoided, the triggering response is sensitive, the reliability is high, the blocking baffle and the sealing structure are matched to effectively cut off the air duct, the fire spreading across the cabinet body is prevented, and the overall structure is simple and has strong environmental adaptability.

Description

Technical Field

[0001] This invention relates to the field of static var generator cabinet technology, and in particular to a modular static var generator cabinet structure. Background Technology

[0002] As a core device in power systems used for reactive power compensation and power quality improvement, the static var generator (SVG) directly determines the equipment's operational stability and service life based on the heat dissipation performance, fire safety, and ease of operation and maintenance of its cabinet structure.

[0003] Currently, the heat dissipation methods for existing SVG cabinets are mainly divided into two categories: water cooling and traditional air cooling. Fire protection largely relies on electrically controlled triggering structures. Water cooling is more widely used, primarily by laying water-cooled pipes inside the cabinet and using circulating water to remove the heat generated by the SVG power modules. However, water-cooled pipes require auxiliary equipment such as water pumps, water tanks, and heat exchangers, resulting in a complex overall structure, large footprint, and the pipes are prone to corrosion and leakage over long-term operation. Leaks can directly damage high-voltage electrical components inside the cabinet, causing short circuits, equipment failures, and other safety hazards. Traditional air cooling methods typically use a fixed air duct structure with a cooling fan, forcing airflow through the fan. While air circulation facilitates heat dissipation, fan operation relies on electricity, leading to energy consumption issues. Furthermore, long-term operation of fans can cause dust accumulation and wear, resulting in a high failure rate. Once a fan fails, heat buildup inside the cabinet can cause overload and burnout of the SVG power module. Additionally, existing SVG cabinets rely heavily on temperature sensors, controllers, and other electronically controlled components to trigger the fire-fighting mechanism by detecting changes in the cabinet's internal temperature. However, the electronically controlled triggering structure is highly susceptible to power grid fluctuations and environmental humidity, making it prone to false triggering or delayed triggering. Moreover, it cannot function properly during power outages or line faults, resulting in insufficient reliability. Furthermore, the addition of electronically controlled components increases the complexity of the cabinet structure and manufacturing costs. Summary of the Invention

[0004] The present invention provides a modular static var generator cabinet structure, which solves the technical problems of high energy consumption, poor reliability and poor fire resistance of existing SVG cabinet heat dissipation methods.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a modular static var generator cabinet structure, comprising multiple cabinets assembled with insulated connection through insulators; The cabinet has an internal cavity for installing SVG power modules and is equipped with a bottom-in, top-out ventilation and heat dissipation assembly. The ventilation and heat dissipation assembly includes a bottom ventilation duct located at the bottom of the cabinet, an air collection box located at the top of the cabinet, and a guide duct connecting the bottom ventilation duct and the air collection box. The cabinet is also equipped with a passive mechanical trigger fire prevention mechanism, which includes a sliding blocking baffle, a spring in an energy storage state, and a positioning component for locking the blocking baffle. The positioning component includes a rotating shaft that rotates with the airflow velocity and a flexible traction rope connected between the rotating shaft and the locking structure.

[0006] As a further improvement of the present invention: multiple flow guide pipes are respectively fixedly installed on the top side of multiple cabinets, the air collection box is installed on the upper side of multiple flow guide pipes, and the air collection box is connected to the flow guide pipes and the top ventilation pipes respectively, and a dust cap is fixedly installed at the top of the top ventilation pipes.

[0007] As a further improvement of the present invention: the positioning component further includes a positioning block, a positioning hole and a follower disc. The follower disc is fixedly disposed at the bottom of the rotating shaft. One end of the flexible traction rope is fixedly connected to the follower disc and the other end is fixedly connected to the positioning block. The positioning hole is opened on one side of the housing and the pressure plate. The positioning block can be embedded in the positioning hole to realize the locking and limiting of the sealing baffle.

[0008] As a further improvement of the present invention: the rotating shaft is installed inside the top ventilation duct through a bearing, the upper end of the rotating shaft is rotatably connected to the dust cap, and a guide vane is fixedly sleeved on the outer surface of the rotating shaft inside the top ventilation duct. The guide vane can rotate synchronously with the change of airflow speed, and drive the rotating shaft and the follower disk to rotate synchronously.

[0009] As a further improvement of the present invention: the passive mechanical trigger fire prevention mechanism further includes a pull rod, a push rod and a connecting rod. The spring is movably sleeved on the outer surface of the pull rod. The pull rod is fixedly connected to the push rod through a pressure plate. Multiple push rods are connected to each other through two connecting rods, which can realize the synchronous movement of multiple push rods, thereby driving multiple sealing baffles to slide synchronously.

[0010] As a further improvement of the present invention: a box is fixedly installed on the rear side of one of the cabinets, and the pressure plate is slidably installed on the inner wall of the box.

[0011] As a further improvement of the present invention: two base plates are fixedly provided on the inner wall of the cabinet, and multiple partitions are fixedly provided on one side of the two base plates. The multiple partitions form a cavity for installing SVG power modules inside the cabinet. Two slide rails are fixedly provided on the inner wall of each cavity, and the SVG power modules are slidably disposed on the inner wall of the slide rails.

[0012] As a further improvement of the present invention: a sealing groove is provided on one side of each of the two base plates, and two sealing buffer pads are fixedly provided on the side of the sealing baffle near the cabinet, and the sealing groove matches the sealing buffer pad.

[0013] As a further improvement of the present invention: the base plate is used to limit the sliding stroke of the SVG power module, and the base plate and the sealing baffle form a cabinet ventilation cavity for airflow to achieve heat dissipation.

[0014] As a further improvement of the present invention: a handle is fixedly provided at one end of the pull rod, and the pull rod is movably embedded in one side of the box body.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: This invention employs a bottom-in, top-out passive natural ventilation and heat dissipation component to replace existing water-cooled and fan-forced air-cooled methods. It eliminates the need for electrically driven components such as water pumps and fans, as well as water-cooled pipes, thus solving the problems of easy water leakage in existing water-cooled systems and high failure rates in traditional air-cooled systems. Simultaneously, relying on changes in airflow velocity and the airflow difference between normal and fire conditions, it achieves passive mechanical triggering for fire prevention. It eliminates the need for temperature sensors, controllers, and other electronic control components, avoiding the defects of accidental triggering and failure due to power outages in electronically controlled systems. The triggering response is sensitive and highly reliable. Furthermore, the sealing baffle and sealing structure work together to effectively isolate the air duct and prevent the fire from spreading across the cabinet. At the same time, the overall structure is simple and highly adaptable to the environment. Attached Figure Description

[0016] Figure 1 This invention presents a schematic diagram of the overall three-dimensional structure of a modular static var generator cabinet.

[0017] Figure 2 This invention presents a side perspective view of a modular static var generator cabinet structure.

[0018] Figure 3 This is a schematic diagram of the internal structure of the cabinet in an embodiment of this application.

[0019] Figure 4 This is a cross-sectional view of the cabinet in an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the sealing baffle in an embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the positioning component in an embodiment of this application.

[0022] Figure 7 This is a cross-sectional view of the box in an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the positioning block in centrifugal motion in an embodiment of this application.

[0024] Figure 9This is a cross-sectional view of the top ventilation duct in an embodiment of this application.

[0025] Explanation of reference numerals in the attached drawings: 1. Cabinet; 2. Bottom ventilation duct; 201. Guide duct; 202. Air collection box; 203. Top ventilation duct; 204. Dust cap; 205. Guide vane; 206. Cabinet ventilation cavity; 207. Slide rail; 208. Partition; 209. SVG power module; 210. Base plate; 211. Sealing baffle; 3. Push rod; 301. Connecting rod; 302. Cabinet; 303. Sealing groove; 304. Pressure plate; 305. Spring; 306. Pull rod; 307. Handle; 308. Rotating shaft; 309. Follower disc; 310. Flexible traction rope; 311. Positioning block; 312. Sealing buffer pad; 313. Positioning hole. Detailed Implementation

[0026] 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, and 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.

[0027] Please see Figures 1 to 9 This embodiment provides a modular static var generator cabinet structure, including multiple cabinets 1 assembled with insulated connection through insulators; The cabinet 1 has an internal cavity for installing the SVG power module 209, and is equipped with a bottom-inlet and top-outlet ventilation and heat dissipation component; The ventilation and heat dissipation components include a bottom ventilation duct 2 located at the bottom of the cabinet 1, an air collection box 202 located at the top of the cabinet 1, and a guide duct 201 connecting the bottom ventilation duct 2 and the air collection box 202. The cabinet 1 is also equipped with a passive mechanical trigger fire prevention mechanism, which includes a sliding blocking baffle 211, a spring 306 in an energy storage state, and a positioning component for locking the blocking baffle 211. The positioning component includes a rotating shaft 308 that rotates with the airflow velocity and a flexible traction rope 310 connected between the rotating shaft 308 and the locking structure.

[0028] During use, cold air from the outside is uniformly introduced into the cabinet through the bottom ventilation duct 2 at the bottom of the cabinet 1. Utilizing the bottom-in, top-out flow path, it can naturally conform to the principle of hot air rising, reducing ventilation resistance and improving heat dissipation efficiency. The airflow is centrally transported to the air collection box 202 through the guide pipe 201 for unified convergence and guidance, ensuring uniform air intake inside each cabinet 1, avoiding insufficient heat dissipation in local modules, and ensuring stable operation of the overall equipment.

[0029] It is worth noting that this embodiment adopts a purely mechanical linkage structure design throughout, without the need for sensors, controllers, or electric drive components. Automatic triggering is achieved by relying on changes in airflow velocity. When an overload, short circuit, or fire fault occurs inside the cabinet 1, the SVG power module 209 heats up rapidly, and the ambient temperature inside the cabinet rises rapidly, causing the air to expand due to heat and intensifying thermal convection. This causes the airflow velocity inside the air duct to increase instantaneously, thereby forming a high-speed airflow. This achieves differentiated changes in airflow velocity under different operating conditions. Based on this physical change, the subsequent mechanical structure linkage triggering can be driven, with no electrical control intervention throughout the process.

[0030] Furthermore, the positioning component also includes a positioning block 311, a positioning hole 313, and a follower disc 309. The follower disc 309 is fixedly installed at the bottom of the rotating shaft 308. One end of the flexible traction rope 310 is fixedly connected to the follower disc 309, and the other end is fixedly connected to the positioning block 311. The positioning hole 313 is opened on one side of the housing 302 and the pressure plate 304. The positioning block 311 can be embedded in the positioning hole 313 to lock and limit the blocking baffle 211. Under normal ventilation conditions, the flexible traction rope 310 remains slack, and the positioning block 311 is engaged inside the positioning hole 313 to form a mechanical lock, preventing the blocking baffle 211 from sliding and shifting, and ensuring that the air duct is unobstructed for a long time. Under high temperature conditions, the centrifugal force generated by the rotation of the follower disc 309 is used to pull and unlock it.

[0031] Please see Figures 1 to 9 In one embodiment, multiple flow guide pipes 201 are fixedly installed on the top side of multiple cabinets 1, and an air collection box 202 is installed on the upper side of multiple flow guide pipes 201. The air collection box 202 is connected to the flow guide pipes 201 and the top ventilation pipe 203, and a dust cap 204 is fixedly installed at the top of the top ventilation pipe 203.

[0032] Specifically, multiple sets of air diversion pipes 201 independently correspond to a single cabinet 1, and then are centrally discharged through the air collection box 202, realizing compartmentalized heat dissipation and unified exhaust. The dust cap 204 can effectively block external dust, debris, and rainwater from entering the pipe, preventing air duct blockage and internal component corrosion, and extending the service life of the equipment. The top ventilation pipe 203 serves as the exhaust terminal channel, which can regulate and guide the upward airflow, avoid turbulent airflow diffusion, ensure that hot air is quickly discharged from the cabinet, and further enhance the heat dissipation effect.

[0033] Please see Figures 1 to 9In one embodiment, a rotating shaft 308 is installed inside the top ventilation duct 203 through a bearing. The upper end of the rotating shaft 308 is rotatably connected to the dust cap 204. A guide vane 205 is fixedly sleeved on the outer surface of the rotating shaft 308 inside the top ventilation duct 203. The guide vane 205 can rotate synchronously with the change of airflow speed, and drive the rotating shaft 308 and the follower disk 309 to rotate synchronously. The guide vane 205 can not only sort the airflow direction and accelerate the air circulation, but also sense the change of airflow speed in real time. According to the different wind speeds of normal heat dissipation and high temperature fire, it switches between low-speed follow rotation and high-speed strong rotation, providing a power source for passive fire prevention triggering.

[0034] Please see Figures 1 to 9 In one embodiment, the passive mechanical trigger fire prevention mechanism further includes a pull rod 305, a push rod 3, and a connecting rod 301. A spring 306 is movably sleeved on the outer surface of the pull rod 305. The pull rod 305 is fixedly connected to the push rod 3 through a pressure plate 304. Multiple push rods 3 are interconnected through two connecting rods 301, enabling multiple push rods 3 to move synchronously, thereby driving multiple blocking baffles 211 to slide synchronously. The spring 306 maintains a compressed and stored energy state for a long time, and releases its elastic force quickly at the moment of unlocking, providing sufficient driving force for the baffle to close. It reacts quickly and can isolate the air duct in time at the initial stage of a fire.

[0035] Please see Figures 1 to 9 In one embodiment, a box 302 is fixedly installed on the rear side of one of the cabinets 1, and a pressure plate 304 is slidably installed on the inner wall of the box 302. The box 302 can support the internal sliding components and positioning components.

[0036] Please see Figures 1 to 9 In one embodiment, two base plates 210 are fixedly provided on the inner wall of the cabinet 1. Multiple partitions 208 are fixedly provided on one side of the two base plates 210. The multiple partitions 208 form a cavity inside the cabinet 1 for installing the SVG power module 209. Two slide rails 207 are fixedly provided on the inner wall of each cavity. The SVG power module 209 is slidably disposed on the inner wall of the slide rails 207.

[0037] Specifically, partition 208 divides the internal space of the cabinet into separate areas, separating the device installation area from the ventilation area to avoid heat accumulation and interference; slide rail 207, in conjunction with sliding SVG power module 209, facilitates module pull-out for inspection, replacement, and subsequent expansion assembly, with a reasonable structural layout and convenient assembly and maintenance.

[0038] Please see Figures 1 to 9In one embodiment, a sealing groove 303 is provided on one side of each of the two base plates 210. Two sealing buffer pads 312 are fixedly provided on the side of the sealing baffle 211 near the cabinet. The sealing groove 303 matches the sealing buffer pad 312. The sealing groove 303 and the sealing buffer pad 312 are precisely aligned and fitted. After the baffle is closed, an interference seal is formed, which effectively improves the airtightness of the air duct after isolation and prevents smoke and hot air from entering and spreading from the gap. At the same time, the buffer pad can reduce the impact noise of the baffle closing and reduce structural wear.

[0039] Please see Figures 1 to 9 In one embodiment, the base plate 210 is used to limit the sliding stroke of the SVG power module 209 to prevent excessive displacement of the module during installation and damage to the wiring. The base plate 210 and the sealing baffle 211 form a cabinet ventilation cavity 206 for airflow to achieve heat dissipation. The independent and sealed cavity structure can concentrate and collect hot air and direct the airflow to prevent heat from spreading to other electrical areas. One end of the pull rod 305 is fixedly provided with a handle 307. The pull rod 305 is movably embedded in one side of the cabinet 302. The handle 307 facilitates manual reset of the locking structure after the fire is extinguished. The operation is simple and convenient, and the cabinet does not need to be disassembled to quickly restore the normal ventilation operation of the equipment.

[0040] Multiple cabinets 1 are assembled with insulators to achieve insulated connectivity, forming a modular and interconnected heat dissipation system. The core relies on a bottom-in, top-out ventilation pattern, combined with a passive mechanical triggering mechanism, to achieve safe and efficient heat dissipation and fire protection. The specific working principle is as follows: Multiple cabinets 1 are insulated and connected by insulators to avoid circuit interference and ensure the coordinated operation of multiple cabinets. Each cabinet is equipped with a bottom ventilation duct 2. Airflow enters from the bottom ventilation duct, is collected by the air collection box 202, and is then transported upward through the guide pipe 201. It flows through the guide vanes 203 and is finally discharged through the top ventilation duct 203. The dust cap 204 can effectively block dust and rainwater from entering and protect the internal components. Multiple cabinets 1 are assembled with insulated connection via insulators. The overall structure adopts a bottom-in, top-out ventilation structure. Outside cold air enters the cabinet 1 through the bottom ventilation duct 2 at the bottom of the cabinet 1. The air collection box 202 is connected to the guide duct 201 and the top ventilation duct 203, so that the airflow entering the multiple cabinets 1 is uniformly transported into the air collection box 202 through multiple guide ducts 201. During the upward movement of the airflow, the guide vanes 205 continuously drive the rotating shaft 308 to rotate synchronously at a low speed. The bottom plate 210 and the sealing baffle 211 form a cabinet ventilation cavity 206 to ensure directional airflow. Under normal working conditions, the follower disc 309 rotates at a low speed with the rotating shaft 308, the flexible traction rope 310 is in a slack state, and the positioning block 311 is engaged and fixed inside the positioning hole 313 to lock the pull rod 305. In position, spring 306 remains compressed and stored, sealing baffle 211 remains open, and the ventilation duct of cabinet 206 is unobstructed, continuously carrying away the working heat of SVG power module 209, with stable and reliable heat dissipation. When a high-temperature fire occurs inside cabinet 1, the flow rate of hot air increases sharply, driving the guide vane 205, rotating shaft 308 and follower disc 309 to rotate at high speed. Follower disc 309 uses centrifugal force to tighten flexible traction rope 310, pulling positioning block 311 out of positioning hole 313, releasing the lock of pull rod 305, spring 306 releases elasticity to push pull rod 305, push rod 3 and connecting rod 301 to work together, causing sealing baffle 211 to slide and fit with bottom plate 210. Sealing groove 303 and sealing buffer pad 312 fit tightly to achieve air duct sealing and isolation, cutting off oxygen supply and preventing smoke and fire from spreading across the cabinet along the ventilation duct.

[0041] Workflow: First, multiple cabinets 1 are spliced ​​together with insulators to complete the overall modular layout; two base plates 210 are fixed to the inner wall of cabinet 1, partitions 208 divide the internal area of ​​cabinet 1, two sets of slide rails 207 are installed on the partitions 208, and multiple SVG power modules 209 are slidably installed into the slide rails 207. The base plates 210 are used to limit the sliding stroke of the SVG power modules 209 to prevent displacement. A bottom ventilation duct 2 is installed at the bottom of the cabinet 1. A separate guide duct 201 is fixed on the top side of the cabinet 1. An air collection box 202 is installed on the upper part of the cabinet 1. The air collection box 202 is connected to the guide duct 201 and the top ventilation duct 203 respectively. A rotating shaft 308 is installed inside the top ventilation duct 203 through a bearing. A dust cap 204 is connected to the upper end of the rotating shaft 308. A guide vane 205 is fixedly sleeved on the outer surface of the rotating shaft 308 inside the top ventilation duct 203. The ventilation rotating component assembly is then completed. Pulling the handle 307 moves the pull rod 305 and the spring 306. At this time, the pressure plate 304 moves one of the push rods 3. The two connecting rods 301 move the other push rods 3 together, causing multiple sealing baffles 211 to slide backward inside the cabinet 1. At this time, the two connecting rods 301 abut against the front of the cabinet 302, and the positioning block 311 is inserted into the positioning hole 313 opened in the cabinet 302 and the pressure plate 304 and locked and fixed. The sealing baffles 211 remain open, and a complete cabinet ventilation cavity 206 is formed between the bottom plate 210 and the sealing baffles 211. When the equipment is operating normally, outside air enters the cabinet 1 through the bottom ventilation duct 2, flows into the air collection box 202 through the guide duct 201, and is then discharged through the top ventilation duct 203. The airflow flows through the cabinet ventilation cavity 206 to continuously dissipate heat from the SVG power module 209. The guide vanes 205 can rotate at low speed to accelerate heat dissipation efficiency, and all locking structures remain locked to ensure continuous and stable ventilation. In the event of overheating or fire, the hot air accelerates to form a high-speed hot airflow, driving the guide vanes 205 to rotate at high speed. The locking structure is unlocked by centrifugal force, and the sealing baffle 211 is automatically closed by mechanical linkage to complete the air duct sealing and fire prevention. After the fire is extinguished, the pull rod 305 is manually reset by the handle 307, and the positioning block 311 is re-embedded in the positioning hole 313. The sealing baffle 211 is then opened, and normal ventilation and heat dissipation can be restored.

[0042] The above-mentioned models are all commercially available products in the prior art. This application is only used as an example of an embodiment and does not limit the use of other equivalent models.

[0043] All standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 "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 process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular static var generator cabinet structure, characterized in that: Includes multiple cabinets assembled with insulators to achieve insulated connection (1); The cabinet (1) has an internal cavity for installing the SVG power module (209) and is equipped with a bottom-inlet and top-outlet ventilation and heat dissipation component; The ventilation and heat dissipation components include a bottom ventilation duct (2) located at the bottom of the cabinet (1), an air collection box (202) located at the top of the cabinet (1), and a guide duct (201) connecting the bottom ventilation duct (2) and the air collection box (202). The cabinet (1) is also equipped with a passive mechanical trigger fire prevention mechanism, which includes a slidable blocking baffle (211), a spring (306) in an energy storage state, and a positioning component for locking the blocking baffle (211). The positioning component includes a rotating shaft (308) that rotates with the airflow velocity and a flexible traction rope (310) connected between the rotating shaft (308) and the locking structure.

2. The modular static var generator cabinet structure according to claim 1, characterized in that: Multiple flow guide pipes (201) are fixedly installed on the top side of multiple cabinets (1). The air collection box (202) is installed on the upper side of multiple flow guide pipes (201), and the air collection box (202) is connected to the flow guide pipes (201) and the top ventilation pipe (203). The top of the top ventilation pipe (203) is fixedly equipped with a dust cap (204).

3. The modular static var generator cabinet structure according to claim 1, characterized in that: The positioning component also includes a positioning block (311), a positioning hole (313), and a follower disc (309). The follower disc (309) is fixedly installed at the bottom of the rotating shaft (308). One end of the flexible traction rope (310) is fixedly connected to the follower disc (309), and the other end is fixedly connected to the positioning block (311). The positioning hole (313) is opened on one side of the box (302) and the pressure plate (304). The positioning block (311) can be embedded in the positioning hole (313) to realize the locking and limiting of the sealing baffle (211).

4. The modular static var generator cabinet structure according to claim 3, characterized in that: The rotating shaft (308) is installed inside the top ventilation duct (203) through a bearing. The upper end of the rotating shaft (308) is rotatably connected to the dust cap (204). A guide vane (205) is fixedly sleeved on the outer surface of the rotating shaft (308) inside the top ventilation duct (203). The guide vane (205) can rotate synchronously with the change of airflow speed and drive the rotating shaft (308) and the follower disk (309) to rotate synchronously.

5. The modular static var generator cabinet structure according to claim 4, characterized in that: The passive mechanical trigger fire prevention mechanism also includes a pull rod (305), a push rod (3) and a connecting rod (301). The spring (306) is movably sleeved on the outer surface of the pull rod (305). The pull rod (305) is fixedly connected to the push rod (3) through the pressure plate (304). Multiple push rods (3) are connected to each other through two connecting rods (301), which can realize the synchronous movement of multiple push rods (3), thereby driving multiple sealing baffles (211) to slide synchronously.

6. The modular static var generator cabinet structure according to claim 5, characterized in that: A box (302) is fixedly installed on the rear side of one of the cabinets (1), and the pressure plate (304) is slidably installed on the inner wall of the box (302).

7. The modular static var generator cabinet structure according to claim 1, characterized in that: The inner wall of the cabinet (1) is fixedly provided with two base plates (210), and a plurality of partitions (208) are fixedly provided on one side of the two base plates (210). The plurality of partitions (208) form a cavity inside the cabinet (1) for installing the SVG power module (209). The inner wall of the plurality of cavities is fixedly provided with two slide rails (207), and the SVG power module (209) is slidably disposed on the inner wall of the slide rails (207).

8. The modular static var generator cabinet structure according to claim 1, characterized in that: A sealing groove (303) is provided on one side of each of the two base plates (210). Two sealing buffer pads (312) are fixedly installed on the side of the sealing baffle (211) near the cabinet. The sealing groove (303) matches the sealing buffer pad (312).

9. The modular static var generator cabinet structure according to claim 7, characterized in that: The base plate (210) is used to limit the sliding stroke of the SVG power module (209), and the base plate (210) and the sealing baffle (211) form a cabinet ventilation cavity (206) for airflow to achieve heat dissipation.

10. A modular static var generator cabinet structure according to claim 5, characterized in that: One end of the pull rod (305) is fixedly provided with a handle (307), and the pull rod (305) is movably embedded in one side of the box body (302).

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