Current-limiting reactor and method for high-voltage side of autotransformer

Abstract

The invention relates to the technical field of current-limiting reactors, and provides a current-limiting reactor and method for the high-voltage side of an autotransformer, the current-limiting reactor for the high-voltage side of the autotransformer comprises a fixed groove frame, the fixed groove frame is fixedly connected to one side of the autotransformer, and a current-limiting reactor body is arranged on the fixed groove frame; the current-limiting reactor body is electrically connected with the autotransformer, the fixing groove frame is provided with a plurality of installation areas, the current-limiting reactor is installed among the installation areas, a plurality of supporting groove frames are arranged in the installation areas, and the current-limiting reactor body is fixedly connected among the supporting groove frames. A bottom supporting cylinder is arranged on the outer side area of the fixing groove frame, a fixing cooling structure is arranged between each supporting groove frame and the bottom supporting cylinder, and by means of the technical scheme, the problem that in the prior art, good cooling is difficult to conduct on the current limiting reactor which is rapidly heated in a short time is solved.

Description

Technical Field

[0001] This invention relates to the smart grid industry, and more specifically to the field of current-limiting reactor technology, and more specifically to a current-limiting reactor and method on the high-voltage side of an autotransformer. Background Technology

[0002] An autotransformer is a high-efficiency, compact transformer suitable for applications requiring minimal voltage regulation and no electrical isolation. It typically features a single winding and offers higher transformation efficiency compared to conventional transformers. However, autotransformers experience high short-circuit currents during operation. Therefore, current-limiting reactors are usually installed on the high-voltage side of the autotransformer to mitigate the impact of short-circuit currents on the power distribution system and to prevent damage to other electrical components in the power distribution system caused by short-circuit currents when the autotransformer experiences a short circuit.

[0003] In existing current-limiting reactors, when the short-circuit current is small, the impact on the power distribution system is minimal, and the reactor does not generate significant temperatures during operation. However, when a large short-circuit current occurs in the autotransformer, the winding temperature of the current-limiting reactor rises rapidly as it blocks this current. Effective temperature control is then necessary to prevent overheating, which could lead to circuit melting and carbonization of the metal structure. Current technologies typically employ natural or forced air cooling, which involves long-term temperature control and is ill-suited for addressing short-term rapid temperature increases. Summary of the Invention

[0004] This invention proposes a current-limiting reactor and method for the high-voltage side of an autotransformer, which solves the problem in the prior art of effectively cooling current-limiting reactors that experience rapid short-term temperature rise.

[0005] The technical solution of the present invention is as follows: A current-limiting reactor on the high-voltage side of an autotransformer includes a fixed slot frame, the fixed slot frame being fixedly connected to one side of the autotransformer, a current-limiting reactor body being disposed on the fixed slot frame, the current-limiting reactor body being electrically connected to the autotransformer, and further comprising: The mounting area is provided on the fixed slot frame, and the current limiting reactor is installed between the multiple mounting areas. Multiple support slot frames are provided in the mounting area, and the current limiting reactor body is fixedly connected between the multiple support slot frames. Bottom support cylinder: The bottom support cylinder is provided on the outer area of ​​the fixed slot frame. A fixed cooling structure is provided between the multiple support slot frames and the bottom support cylinder. The fixed cooling structure is used to reduce the bottom temperature of the current limiting reactor body. The lateral cooling structure has a sandwich frame fixedly connected to the top of the fixed slot frame, and the lateral cooling structure is provided inside the sandwich frame to reduce the lateral temperature of the current-limiting reactor body.

[0006] In order to install the current-limiting reactor body into multiple installation areas, the bottom end of the current-limiting reactor body is further fixedly connected with multiple fastening slots, and the fastening slots are fixedly connected to the support slots.

[0007] In order to dissipate the heat generated by the current-limiting reactor body during operation, the top of the bottom support cylinder is provided with multiple heat exchange grooves, and the fixed slot frame and the support slot frame are provided with multiple ventilation slots.

[0008] To further cool the bottom of the current-limiting reactor body, the fixed cooling structure includes a water storage cylinder, a clamp-shaped support, and a grooved heat sink. The water storage cylinder is fixedly connected inside the support groove and communicates with the bottom support cylinder. A closing valve is provided between the water storage cylinder and the bottom support cylinder. Multiple clamp-shaped supports are fixedly connected between the top of the water storage cylinder and the support groove. The top of the clamp-shaped support contacts the bottom end of the current-limiting reactor body. The grooved heat sink is fixedly connected inside the clamp-shaped support and contacts the bottom end of the current-limiting reactor body. The bottom of the grooved heat sink is fixedly connected to the water storage cylinder.

[0009] To facilitate the installation of the slotted heat sink, a support area is further provided in the middle of the clamp-shaped support, and the slotted heat sink is fixedly connected to the support area. Support end faces are provided on both sides of the top of the clamp-shaped support, and the support end faces are in contact with the bottom end of the current-limiting reactor body.

[0010] To further protect and dissipate heat from the current-limiting reactor, the sandwich frame is connected to the top of the fixed slot frame. Multiple rectangular slots are provided on the inner and outer sides of the sandwich frame. A metal protective layer is fixedly connected in the rectangular slots, and multiple air inlet slots are provided on the metal protective layer.

[0011] To further dissipate heat laterally from the current-limiting reactor body, the lateral cooling structure includes a bottom fixed cylinder, a top lifting cylinder, and a circulation network. The bottom fixed cylinder is connected between the fixed slot frame and the interlayer frame. A conveying structure is provided between the bottom fixed cylinder and the bottom support cylinder. The top lifting cylinder is longitudinally movable within the interlayer frame. A lifting drive assembly is provided between the top lifting cylinder and the interlayer frame. The circulation network is connected between the top lifting cylinder and the bottom fixed cylinder.

[0012] In order to transport the liquid in the bottom support cylinder to the lateral cooling structure, the conveying structure further includes a liquid conveying device and a water pumping pipe. The liquid conveying device is installed in the fixed trough frame, and the water pumping pipe is connected to the input end of the liquid conveying device. The bottom circumference of the water pumping pipe is provided with multiple water inlets, and the output end of the liquid conveying device is connected to the bottom fixed cylinder.

[0013] In order to extend the circulation network longitudinally within the sandwich frame, the lifting drive assembly further includes a lifting chamber and a screw drive structure. The lifting chamber is connected to the sandwich frame, and a lifting support plate is slidably connected inside the lifting chamber. The lifting support plate is fixedly connected to the top lifting cylinder, and the screw drive structure that drives the lifting support plate to move longitudinally is provided inside the lifting chamber.

[0014] The working principle and beneficial effects of this invention are as follows: 1. In this invention, when installing the current-limiting reactor body, the current-limiting reactor body is installed on the fixed slot frame, and the bottom support cylinder filled with water is increased with the counterweight of the fixed slot frame to improve the stability of the current-limiting reactor body during use. In addition, the metal protective layer on the sandwich frame is used to protect the current-limiting reactor body.

[0015] 2. In this invention, a fixed cooling structure is used to continuously cool the bottom of the current-limiting reactor body, thereby controlling the surface temperature of the current-limiting reactor body during normal operation. When the current-limiting reactor body experiences a temperature rise due to blocking a large amount of short-circuit current, the fixed cooling structure can still maintain sufficient cooling of the bottom of the current-limiting reactor body.

[0016] 3. In this invention, when the current-limiting reactor body experiences a temperature rise due to blocking a large amount of short-circuit current, the lateral cooling structure is deployed within the sandwich frame to increase the contact area between the coolant and the external environment. The metal protective layer is used to dissipate heat from the lateral cooling structure, and the lateral cooling structure and the fixed cooling structure simultaneously cool the current-limiting reactor body, thereby accelerating the cooling of the heated current-limiting reactor body. Whether combined with natural air cooling or forced air cooling, it can effectively improve the cooling effect on the current-limiting reactor body. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a 3D structural schematic diagram of a current-limiting reactor on the high-voltage side of an autotransformer according to the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3This is a schematic diagram of the structure of the fixed slot frame, the current-limiting reactor body, the supporting slot frame, the bottom support cylinder and the sandwich frame in this invention. Figure 4 This is a partial cross-sectional structural diagram showing the cooperation of the fixed slot frame, the current-limiting reactor body, the supporting slot frame, the bottom support cylinder, and the sandwich frame in this invention. Figure 5 This is a partial cross-sectional structural diagram showing the cooperation of the fixed slot frame, the supporting slot frame, the bottom support cylinder, and the fastening slot frame in this invention; Figure 6 This is a partial cross-sectional structural diagram showing the cooperation of the support frame, bottom support cylinder, water storage cylinder, clamp-shaped support, and groove-shaped heat dissipation component in this invention. Figure 7 For the present invention Figure 6 A magnified structural diagram of point A in the middle; Figure 8 This is a partial cross-sectional structural diagram showing the cooperation of the bottom support cylinder, liquid conveying equipment, bottom fixed cylinder, top lifting cylinder, and flow pipeline in this invention. Figure 9 For the present invention Figure 8 A magnified structural diagram of a portion of point B in the middle.

[0019] In the diagram: 1. Fixed trough frame; 2. Current-limiting reactor body; 3. Installation area; 4. Support trough frame; 5. Bottom support cylinder; 6. Sandwich frame; 7. Fastening trough frame; 8. Heat exchange groove; 9. Ventilation trough; 10. Water storage cylinder; 11. Closing valve; 12. Clamp-shaped support; 13. Trough-shaped heat dissipation component; 14. Support area; 15. Support end face; 16. Metal protective layer; 17. Bottom fixed cylinder; 18. Top lifting cylinder; 19. Circulation pipeline; 20. Liquid conveying equipment; 21. Pumping pipeline; 22. Lifting chamber; 23. Lifting support plate; 24. Screw drive structure; 25. Inlet valve pipe. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1, as Figures 1 to 9As shown, this embodiment proposes a current-limiting reactor on the high-voltage side of an autotransformer, including a fixed slot frame 1, which is fixedly connected to one side of the autotransformer. A current-limiting reactor body 2 is installed on the fixed slot frame 1. The current-limiting reactor body 2 is electrically connected to the autotransformer. The current-limiting reactor can block the short-circuit current that occurs in the autotransformer, thus protecting other electrical components in the power distribution system. The current-limiting reactor is electrically connected to the winding of the autotransformer to enable the current-limiting reactor to function.

[0022] It also includes an installation area 3, with multiple installation areas 3 set on the fixed slot frame 1. The current-limiting reactor is installed between the multiple installation areas 3. Multiple support slot frames 4 are set in the installation area 3. The current-limiting reactor body 2 is fixedly connected between the multiple support slot frames 4. Multiple fastening slot frames 7 are fixedly connected to the bottom end of the current-limiting reactor body 2. The fastening slot frames 7 are fixedly connected to the support slot frames 4. The fastening slot frames 7 at the bottom of the current-limiting reactor body 2 are fixedly connected to the support slot frames 4 by bolts, so that the multiple windings of the current-limiting reactor body 2 are fixed between the multiple installation areas 3.

[0023] A bottom support cylinder 5 is provided on the outer area of ​​the fixed support 1. Multiple heat exchange grooves 8 are provided on the top of the bottom support cylinder 5. Multiple ventilation grooves 9 are provided on both the fixed support 1 and the support support 4. A water inlet valve pipe 25 is connected to one side of the bottom support cylinder 5. Coolant is injected between the bottom support cylinder 5 and multiple water storage cylinders 10 through the water inlet valve pipe 25. During the flow of external air from the fixed support 1, the air can enter the fixed support 1 and the support support 4 through the ventilation grooves 9. The multiple heat exchange grooves 8 provided in the bottom support cylinder 5 can increase the contact area between the air and the bottom support cylinder 5 and make the air flow from the fixed support 1 to the support support 4 more smoothly. The obstruction of the air flow is smaller, making it easier for the air to flow and dissipate in the fixed support 1 and the support support 4, and effectively dissipating the heat in the fixed support 1 and the support support 4. Both the fixed trough 1 and the supporting trough 4 have drainage holes at their bottoms for draining accumulated water from the fixed trough 1 and the supporting trough 4. Multiple support slots 4 are each equipped with a fixed cooling structure between themselves and the bottom support cylinder 5. The fixed cooling structure is used to reduce the bottom temperature of the current-limiting reactor body 2. The fixed cooling structure includes a water storage cylinder 10, clamp-shaped support members 12, and a grooved heat sink 13. The water storage cylinder 10 is fixedly connected inside the support slot 4 and is connected to the bottom support cylinder 5. A closing valve 11 is provided between the water storage cylinder 10 and the bottom support cylinder 5. Multiple clamp-shaped support members 12 are fixedly connected between the top of the water storage cylinder 10 and the support slot 4. The top of the clamp-shaped support member 12 contacts the bottom end of the current-limiting reactor body 2. A grooved heat sink is fixedly connected inside the clamp-shaped support member 12. 13. The grooved heat sink 13 contacts the bottom end of the current limiting reactor body 2. The bottom of the grooved heat sink 13 is fixedly connected to the water storage cylinder 10. When coolant is injected into the bottom support cylinder 5, coolant will also enter multiple water storage cylinders 10. When a sufficient amount of coolant is injected into the water storage cylinder 10, the closing valve 11 is closed to cut off the connection between the water storage cylinder 10 and the bottom support cylinder 5. Then, when the coolant in the bottom support cylinder 5 is subsequently transported to the bottom fixed cylinder 17, the coolant in the water storage cylinder 10 will not be extracted. This enables the water storage cylinder 10 and the circulation pipe network 19 to cooperate with each other to perform heat dissipation work on the current limiting reactor body 2. The clamp-shaped support 12 is a rigid metal structure. The clamp-shaped support 12 is fixedly connected between the bottom of the current limiting reactor body 2 and the water storage cylinder 10, effectively supporting the current limiting reactor body 2 and fixing the slotted heat sink 13. When the slotted heat sink 13 is in contact with both the water storage cylinder 10 and the current limiting reactor body 2, the slotted heat sink 13 is prevented from bearing pressure and from deforming.

[0024] The clamp-shaped support 12 has a support area 14 in the middle, and the slotted heat sink 13 is fixedly connected in the support area 14. The top two sides of the clamp-shaped support 12 are provided with support end faces 15, which are in contact with the bottom end of the current limiting reactor body 2. This allows the support end faces 15 at the top of the clamp-shaped support 12 to contact the bottom end of the current limiting reactor body 2, effectively supporting the current limiting reactor body 2 and effectively protecting the relatively thin slotted heat sink 13.

[0025] A sandwich frame 6 is fixedly connected to the top of the fixed slot frame 1. The sandwich frame 6 is connected to the top of the fixed slot frame 1. Multiple rectangular slots are provided on the inner and outer sides of the sandwich frame 6. A metal protective layer 16 is fixedly connected in the rectangular slots. Multiple air inlet slots are provided on the metal protective layer 16. The metal protective layer 16 is used to protect the current limiting reactor body 2 and prevent external forces in the external environment from damaging the current limiting reactor body 2. A lateral cooling structure is provided within the interlayer frame 6 to reduce the lateral temperature of the current-limiting reactor body 2. The lateral cooling structure includes a bottom fixed cylinder 17, a top lifting cylinder 18, and a flow network 19. The bottom fixed cylinder 17 connects to the fixed slot frame 1 and the interlayer frame 6. A conveying structure is provided between the bottom fixed cylinder 17 and the bottom support cylinder 5. The top lifting cylinder 18 is longitudinally movable within the interlayer frame 6. A lifting drive assembly is provided between the top lifting cylinder 18 and the interlayer frame 6. The flow network 19 connects to the top lifting cylinder 18 and the bottom fixed cylinder 17. When rapid cooling of the rapidly heating current-limiting reactor body 2 is required, the top lifting cylinder 18 is driven to rise within the interlayer frame 6. The shapes of the cylinder 18 and the bottom fixed cylinder 17 are adapted to the interior of the sandwich frame 6. After the top lifting cylinder 18 rises, the circulation network 19 extends between the top lifting cylinder 18 and the bottom fixed cylinder 17, and delivers the coolant in the bottom support cylinder 5 to the bottom fixed cylinder 17, the circulation network 19 and the top lifting cylinder 18. During the process of the external airflow passing through the metal protective layer 16 and the circulation network 19, the airflow temperature is reduced, so that when the airflow comes into contact with the current limiting reactor body 2, it effectively dissipates heat on the current limiting reactor body 2. After the airflow is discharged from the current limiting reactor body 2, it passes through the metal protective layer 16 and the circulation network 19 for further cooling, preventing the airflow from causing a heating effect on other electrical components in the outside when it dissipates. The conveying structure includes a liquid conveying device 20 and a pumping pipe 21. The liquid conveying device 20 is installed in the fixed tank frame 1. The pumping pipe 21 is connected to the input end of the liquid conveying device 20. Multiple water inlets are opened on the bottom circumference of the pumping pipe 21. The output end of the liquid conveying device 20 is connected to the bottom fixed cylinder 17. In order to draw the coolant in the bottom support cylinder 5 into the bottom support cylinder, the circulation network and the top lifting cylinder 18, the liquid conveying device 20 is started to transport the coolant in the bottom support cylinder 5 to the bottom support cylinder through the pumping pipe 21. The multiple water inlets opened on the bottom of the pumping pipe 21 around the circumference enable the rapid extraction of coolant. During the extraction of coolant in the bottom support cylinder 5, the coolant in the water storage cylinder 10 is not extracted. The water storage cylinder 10 and the circulation network 19 work together to cool the current limiting reactor body 2. The lifting drive assembly includes a lifting chamber 22 and a screw drive structure 24. The lifting chamber 22 is connected to the mezzanine frame 6. A lifting support plate 23 is slidably connected inside the lifting chamber 22. The lifting support plate 23 is fixedly connected to the top lifting cylinder 18. The lifting chamber 22 is provided with a screw drive structure 24 that drives the lifting support plate 23 to move longitudinally. When it is necessary to drive the top lifting cylinder 18 to move up and down, the screw drive structure 24 driven by the motor and gearbox drives the lifting support plate 23 to move longitudinally, so that the lifting support plate 23 drives the top lifting cylinder 18 to move longitudinally within the mezzanine frame 6.

[0026] The working principle of the current-limiting reactor on the high-voltage side of the autotransformer: First, the current-limiting reactor body 2 is installed between multiple installation areas 3 on the fixed slot frame 1. Then, the current-limiting reactor body 2 is electrically connected to the autotransformer. When a short-circuit current occurs in the autotransformer and the power distribution system, the current-limiting reactor body 2 effectively blocks the short-circuit current. When the current-limiting reactor body 2 experiences a temperature rise due to blocking short-circuit current, the top lifting cylinder 18 is driven to rise within the sandwich frame 6. The shapes of the top lifting cylinder 18 and the bottom fixed cylinder 17 are adapted to the interior of the sandwich frame 6. After the top lifting cylinder 18 rises, the circulation network 19 extends between the top lifting cylinder 18 and the bottom fixed cylinder 17, transporting the coolant in the bottom support cylinder 5 to the area between the bottom fixed cylinder 17, the circulation network 19, and the top lifting cylinder 18. As the external airflow passes through the metal protective layer 16 and the circulation network 19, the airflow temperature is reduced, effectively dissipating heat from the current-limiting reactor body 2 when the airflow comes into contact with it. Additionally, the water storage cylinder 10 and the trough-shaped heat sink 13 effectively dissipate heat from the current-limiting reactor body 2.

[0027] Example 2: Based on a current-limiting reactor on the high-voltage side of an autotransformer, this invention also proposes a method for using the current-limiting reactor on the high-voltage side of an autotransformer, specifically including the following steps: Step 1, Installation: Install the current-limiting reactor body 2 between multiple installation areas 3 on the fixed slot frame 1, and then maintain an electrical connection between the current-limiting reactor body 2 and the autotransformer; Step 2, Isolation: When a short-circuit current occurs in the autotransformer and the power distribution system, the short-circuit current is effectively isolated by the current-limiting reactor body 2. Step 3, Cooling: When the current-limiting reactor body 2 experiences a temperature rise due to blocking the short-circuit current, the top lifting cylinder 18 is driven to rise within the sandwich frame 6. The shapes of the top lifting cylinder 18 and the bottom fixed cylinder 17 are adapted to the interior of the sandwich frame 6. After the top lifting cylinder 18 rises, the circulation network 19 extends between the top lifting cylinder 18 and the bottom fixed cylinder 17, transporting the coolant in the bottom support cylinder 5 to the bottom fixed cylinder 17, the circulation network 19, and the top lifting cylinder 18. As the external airflow passes through the metal protective layer 16 and the circulation network 19, the airflow temperature is reduced. When the airflow comes into contact with the current-limiting reactor body 2, it effectively dissipates heat from the current-limiting reactor body 2. Additionally, the water storage cylinder 10 and the grooved heat sink 13 also dissipate heat from the current-limiting reactor body 2.

[0028] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A current-limiting reactor on the high-voltage side of an autotransformer, comprising a fixed slot frame (1), the fixed slot frame (1) being fixedly connected to one side of the autotransformer, a current-limiting reactor body (2) being disposed on the fixed slot frame (1), the current-limiting reactor body (2) being electrically connected to the autotransformer, characterized in that, Also includes: The mounting area (3) is provided on the fixed slot (1) with multiple mounting areas (3), the current limiting reactor is installed between multiple mounting areas (3), multiple support slots (4) are provided in the mounting area (3), and the current limiting reactor body (2) is fixedly connected between multiple support slots (4). Bottom support cylinder (5), the bottom support cylinder (5) is provided on the outer area of ​​the fixed slot frame (1), and a fixed cooling structure is provided between the multiple support slot frames (4) and the bottom support cylinder (5). The fixed cooling structure is used to reduce the bottom temperature of the current limiting reactor body (2). The side cooling structure is provided in the top of the fixed slot (1) with a sandwich frame (6) fixedly connected. The side cooling structure is provided in the sandwich frame (6) to reduce the side temperature of the current limiting reactor body (2).

2. The current-limiting reactor on the high-voltage side of an autotransformer according to claim 1, characterized in that, The bottom end of the current-limiting reactor body (2) is fixedly connected to a plurality of fastening slots (7), and the fastening slots (7) are fixedly connected to the support slots (4).

3. A current-limiting reactor on the high-voltage side of an autotransformer according to claim 2, characterized in that, The bottom support cylinder (5) has multiple heat exchange grooves (8) on its top, and the fixed slot frame (1) and the support slot frame (4) both have multiple ventilation slots (9).

4. A current-limiting reactor on the high-voltage side of an autotransformer according to claim 3, characterized in that, The fixed cooling structure includes: A water storage cylinder (10) is fixedly connected in the support trough (4). The water storage cylinder (10) is connected to the bottom support cylinder (5), and a closing valve (11) is provided between the water storage cylinder (10) and the bottom support cylinder (5). Clamp-shaped support (12): Multiple clamp-shaped support members (12) are fixedly connected between the top of the water storage cylinder (10) and the support groove frame (4). The top of the clamp-shaped support member (12) is in contact with the bottom end of the current limiting reactor body (2). The grooved heat sink (13) is fixedly connected inside the clamp-shaped support (12). The grooved heat sink (13) is in contact with the bottom end of the current limiting reactor body (2). The bottom of the grooved heat sink (13) is fixedly connected to the water storage cylinder (10).

5. A current-limiting reactor on the high-voltage side of an autotransformer according to claim 4, characterized in that, The clamp-shaped support (12) has a support area (14) in the middle, and the slotted heat sink (13) is fixedly connected in the support area (14). The clamp-shaped support (12) has support end faces (15) on both sides of the top, and the support end faces (15) are in contact with the bottom end of the current limiting reactor body (2).

6. A current-limiting reactor on the high-voltage side of an autotransformer according to claim 5, characterized in that, The sandwich frame (6) is connected to the top of the fixed slot frame (1). Multiple rectangular slots are provided on the inner and outer sides of the sandwich frame (6). A metal protective layer (16) is fixedly connected in the rectangular slots. Multiple air inlet slots are provided on the metal protective layer (16).

7. A current-limiting reactor on the high-voltage side of an autotransformer according to claim 6, characterized in that, The lateral cooling structure includes: A bottom fixed cylinder (17) is connected between the fixed slot frame (1) and the interlayer frame (6), and a conveying structure is provided between the bottom fixed cylinder (17) and the bottom support cylinder (5). A top lifting cylinder (18) is longitudinally movable within the interlayer frame (6), and a lifting drive assembly is provided between the top lifting cylinder (18) and the interlayer frame (6). A circulation network (19) is connected between the top lifting cylinder (18) and the bottom fixed cylinder (17).

8. A current-limiting reactor on the high-voltage side of an autotransformer according to claim 7, characterized in that, The conveying structure includes: Liquid conveying equipment (20), the liquid conveying equipment (20) is disposed in the fixed trough (1); A water pumping pipe (21) is connected to the input end of the liquid conveying device (20), and the bottom circumference of the water pumping pipe (21) is provided with multiple water inlets; The output end of the liquid conveying device (20) is connected to the bottom fixed cylinder (17).

9. A current-limiting reactor on the high-voltage side of an autotransformer according to claim 8, characterized in that, The lifting drive component includes: A lifting chamber (22) is connected to the sandwich frame (6), and a lifting support plate (23) is slidably connected inside the lifting chamber (22). The lifting support plate (23) is fixedly connected to the top lifting cylinder (18). The lead screw drive structure (24) is provided in the lifting chamber (22) to drive the lifting support plate (23) to move longitudinally.

10. A method of using a current-limiting reactor on the high-voltage side of an autotransformer, comprising using the current-limiting reactor on the high-voltage side of an autotransformer as described in claim 9, characterized in that... Includes the following steps: Step 1, Installation: Install the current-limiting reactor body (2) between multiple installation areas (3) on the fixed slot frame (1), and then maintain an electrical connection between the current-limiting reactor body (2) and the autotransformer; Step 2, Isolation: When a short-circuit current occurs in the autotransformer and the power distribution system, the short-circuit current is effectively isolated by the current-limiting reactor body (2); Step 3, Cooling: When the current-limiting reactor body (2) is blocked by short-circuit current and the temperature rises, the top lifting cylinder (18) is driven to rise in the sandwich frame (6). The shape of the top lifting cylinder (18) and the bottom fixed cylinder (17) are adapted to the inside of the sandwich frame (6). After the top lifting cylinder (18) rises, the flow network (19) extends between the top lifting cylinder (18) and the bottom fixed cylinder (17), and the coolant in the bottom support cylinder (5) is transported to the bottom fixed cylinder (17), the flow network (19) and the top lifting cylinder (18). During the process of the external airflow passing through the metal protective layer (16) and the flow network (19), the airflow temperature is reduced. When the airflow comes into contact with the current-limiting reactor body (2), it effectively dissipates heat from the current-limiting reactor body (2), and the water storage cylinder (10) and the grooved heat sink (13) are used to dissipate heat from the current-limiting reactor body (2).

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