Transformer temperature control device and temperature control method thereof

Abstract

The invention discloses a transformer temperature control device and a temperature control method thereof.The transformer temperature control device comprises a dry transformer cross flow cooling fan which is arranged on the side away from a corresponding high-voltage connecting rod of a transformer, and an air inlet of the dry transformer cross flow cooling fan is located in the side, away from the transformer, of the dry transformer cross flow cooling fan. The temperature of each key part of the transformer is monitored in real time through the distributed optical fiber temperature measurement assembly, when the temperature of a certain area exceeds the standard, the dry-type transformer cross-flow cooling fan is started, external cold air is sucked in through the air inlet away from the side of the transformer and is fed into the rectangular wind scooper through the top air outlet, and the regulation and control assembly drives the corresponding baffle to rotate according to temperature distribution data. The strip-shaped air outlet holes are selectively opened, cold air is accurately blown to a high-temperature area, airflow between the iron core columns is guided to a high-voltage terminal through the flow guide assembly, insulation weak parts are mainly cooled, intelligent temperature control of comprehensive monitoring, fixed-point cooling and efficient heat dissipation is achieved, the winding hot-spot temperature is effectively reduced, and operation safety is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a transformer temperature control device and its temperature control method. Background Technology

[0002] Dry-type transformers are widely used in high-safety locations such as high-rise buildings, airports, and data centers due to their advantages of fire resistance, explosion protection, and ease of maintenance. During operation, the windings, core, and terminals of a dry-type transformer generate a large amount of heat due to electromagnetic and resistive losses. If this heat cannot be dissipated in time, it will lead to excessively high equipment temperatures, accelerate insulation aging, shorten the transformer's lifespan, and in severe cases, cause short circuits, burnout, and other safety accidents. Therefore, a reliable temperature control device is required to achieve precise temperature control.

[0003] Traditional dry-type transformers mostly use platinum resistance thermometers as temperature sensing elements, which have obvious technical shortcomings: First, the temperature measurement accuracy is poor. It is affected by strong electromagnetic interference during transformer operation, resulting in large temperature measurement errors. Moreover, it is prone to aging and drift when exposed to high-temperature environments for a long time, which further aggravates temperature measurement distortion. Second, the response is lagging, and it is impossible to capture temperature changes in key parts such as windings and cores in real time, making it difficult to provide early warning of local heat accumulation.

[0004] More importantly, traditional heat dissipation equipment and temperature measurement systems have poor compatibility. They can only achieve uniform heat dissipation across the entire area and cannot deliver air precisely to areas with heat accumulation. This results in heat buildup in hot spots that cannot be dissipated quickly, and excessive cooling in low-temperature areas that leads to energy waste. Overall, the temperature control effect is poor and it is difficult to meet the high-efficiency and precise temperature control requirements of dry-type transformers. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned above by providing a transformer temperature control device and its temperature control method, thereby achieving accurate temperature measurement and targeted heat dissipation.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a transformer temperature control device, comprising: The dry-type transformer crossflow cooling fan is located on the side away from the corresponding high-voltage connection rod of the transformer. The air inlet of the dry-type transformer crossflow cooling fan is located on the side of the dry-type transformer crossflow cooling fan away from the transformer, and the air outlet of the dry-type transformer crossflow cooling fan is located at the top of the dry-type transformer crossflow cooling fan. The air guiding mechanism includes a rectangular air guiding hood disposed at the air outlet of the crossflow cooling fan of the dry transformer. The rectangular air guiding hood has multiple strip-shaped air outlets arranged vertically on the side near the transformer. The rectangular air guiding hood has multiple baffles that correspond one-to-one with the multiple strip-shaped air outlets on the side near the transformer. The air guiding mechanism also includes a control component for controlling the baffles to rotate towards or away from the strip-shaped air outlets. The flow guiding component is located on the side near the corresponding high-voltage connection rod of the transformer and is used to guide the airflow between the three iron core columns of the transformer to the high-voltage terminal. At least one distributed optical fiber temperature measurement component, wherein the temperature measurement optical fiber of the distributed optical fiber temperature measurement component is wound around the transformer and is used to measure the temperature of the upper end, lower end, iron core and various connection points of the transformer winding.

[0007] Furthermore, the baffle is rotatably connected to the rectangular air guide shroud via a torsion spring, and the baffle flips to a horizontal position when the torsion spring is in its natural state. The control assembly includes two side plates disposed on the side of the dry-type transformer crossflow cooling fan near the transformer. A lead screw slide that can slide up and down is disposed between the two side plates. An electric lead screw for driving the lead screw slide to move up and down is also disposed between the two side plates. A servo motor is disposed on the lead screw slide. A lever is disposed at the output end of the servo motor. When the lever is rotated to its limit towards the electric lead screw, the baffle is not located within the up and down movement area of ​​the lever. When the lever is rotated to its limit away from the electric lead screw, the lever can move down to push the baffle to rotate into the strip-shaped air outlet. The control assembly also includes a locking component for locking and unlocking the baffle pushed into the strip-shaped air outlet.

[0008] Furthermore, each of the baffles has a groove on the side away from the rectangular air guide cover, and two spring telescopic pins are symmetrically arranged in the groove of each baffle. The locking component includes a suspension frame mounted on the top of a rectangular air guide cover. A guide post is mounted on the top of the suspension frame, penetrating the suspension frame. The guide post consists of an anti-detachment section and a movable section located at the bottom of the anti-detachment section. The suspension frame has a through hole for the movable section to pass through. The diameter of the anti-detachment section is larger than the diameter of the through hole. A locking post is mounted at the bottom of the guide post, passing through the grooves of each baffle in sequence. A compression spring is mounted between the locking post and the suspension frame. Multiple sets of inclined guide grooves are mounted on both the side of the locking post closest to and furthest from the transformer. When the torsion spring is in its natural state, the spring telescopic pin is located on the side of the locking post furthest from the transformer. When the compression spring is in its natural state, the inclined guide groove on the side furthest from the transformer is located within the rotation area of ​​the spring telescopic pin. When the compression spring is in its ultimate compressed state, the inclined guide groove on the side closest to the transformer is located within the rotation area of ​​the spring telescopic pin. When the lever is rotated to its limit away from the electric screw, the lever can push the locking post upward.

[0009] Furthermore, the current guiding assembly includes a base disposed on the transformer and two current guiding plates disposed on the top of the base. The two current guiding plates are respectively located between two adjacent iron core columns. The current guiding plates are V-shaped plates, and one of their opening sides is located away from the transformer.

[0010] A transformer temperature control method, utilizing any one of the transformer temperature control devices described above, includes the following steps: S1. Start the distributed optical fiber temperature measurement component. Through the temperature measurement optical fiber wound on the transformer, the temperature data of the upper end, lower end, iron core and each connection point of the transformer winding are collected in real time to form a multi-dimensional temperature monitoring dataset. S2. Compare the collected temperature data at each point with the preset temperature threshold to determine whether to trigger the cooling control action. The preset temperature threshold includes the winding safety threshold, the core safety threshold, and the connection point safety threshold. S3. When the temperature data at any point reaches or exceeds the corresponding preset temperature threshold, the dry transformer crossflow cooling fan is started. Outside cold air is drawn in through the air inlet on the side of the dry transformer crossflow cooling fan away from the transformer and sent into the rectangular air guide shroud of the air guide mechanism through the top air outlet. S4. By controlling the baffle to rotate, the opening position of each strip air outlet of the rectangular air guide hood is adjusted so that the cold air is directed to the corresponding area where the temperature exceeds the standard. S5. Through the V-shaped guide plate of the guide assembly, the airflow between the three iron core columns of the transformer is guided to converge and blow towards the high-voltage terminal. S6. The distributed fiber optic temperature measurement component continuously collects temperature data and dynamically adjusts the baffle angle according to the temperature change trend until the temperature at each point is lower than the corresponding preset temperature threshold.

[0011] Furthermore, the specific process of adjusting and locking the baffle angle in step S6 includes: The electric lead screw drives the lead screw slide to move up and down along the side plate, which in turn moves the servo motor and lever to the position above the baffle corresponding to the normal temperature zone. The servo motor drives the lever to rotate to the limit state away from the electric lead screw. The electric lead screw drives the lead screw slide to move down, and the lever pushes the corresponding baffle to overcome the torsion spring force and rotate downward, so that the baffle flips into the strip-shaped air outlet. At this time, the spring telescopic pin is guided by the inclined guide groove on the side away from the transformer, first compresses and passes over the locking post, and then returns to its original position and extends. It is blocked by the locking post and keeps blocking the strip-shaped air outlet. When the temperature in the corresponding area drops below the safety threshold, the electric lead screw drives the lead screw slide to move upward until the lever pushes the locking pin upward. This causes the inclined guide groove, which was originally below the corresponding spring telescopic pin, to move upward. This allows the baffle, which was blocked by the locking pin and could not be reset, to be guided by the torsion spring's reset thrust. The spring telescopic pin is then guided through the inclined guide groove near the transformer, first compressing past the locking pin, and then resetting and extending. This returns each baffle to its initial state, ready for the next adjustment.

[0012] Furthermore, the preset temperature thresholds mentioned in step S2 include sequentially increasing safety thresholds, over-temperature warning thresholds, and limit protection thresholds; the operating power of the dry-type cross-flow cooling fan mentioned in step S3 is adjusted in conjunction with the temperature exceeding the limit. When the point temperature reaches the over-temperature warning threshold but does not exceed the limit protection threshold, the fan operates at 70%-80% of its rated power; when the point temperature reaches the limit protection threshold, the fan immediately switches to 100% of its rated power until the corresponding point temperature drops below the safety threshold, then the fan switches back to 50% of its rated power and maintains operation for 30 minutes before stopping.

[0013] The beneficial effects of this invention are reflected in: This invention uses a distributed fiber optic temperature measurement component to monitor the temperature of key parts of the transformer in real time. When the temperature in a certain area exceeds the standard, the dry-type transformer cross-flow cooling fan is activated. Outside cold air is drawn in through the air inlet away from the transformer and sent into the rectangular air guide shroud through the top air outlet. The control component drives the corresponding baffle to rotate according to the temperature distribution data, so that the strip air outlet can be selectively opened. The cold air is precisely blown to the high-temperature area. The airflow between the iron core columns is guided to the high-voltage terminals through the flow guiding component, focusing on cooling the weak insulation parts. This achieves intelligent temperature control of "comprehensive monitoring - targeted cooling - efficient heat dissipation", effectively reducing the winding hot spot temperature and ensuring operational safety. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the air guiding mechanism of the present invention; Figure 3 for Figure 2 A magnified view of a portion at point A shown; Figure 4 This is a partial view of the locking pin of the present invention.

[0015] In the picture: 1. Dry-type cross-flow cooling fan; 2. Air guide mechanism; 21. Rectangular air guide shroud; 22. Baffle; 23. Control assembly; 231. Side plate; 232. Screw slide table; 233. Electric screw; 234. Servo motor; 235. Lever; 236. Suspension bracket; 237. Guide column; 238. Locking column; 239. Compression spring; 24. Spring telescopic pin; 3. Air guide assembly. Detailed Implementation

[0016] 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 a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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.

[0017] Please see Figure 1-4 This invention discloses a transformer temperature control device, comprising: The dry-type transformer crossflow cooling fan 1 is located on the side away from the corresponding high-voltage connection rod of the transformer. The air inlet of the dry-type transformer crossflow cooling fan 1 is located on the side away from the transformer, and the air outlet of the dry-type transformer crossflow cooling fan 1 is located at the top of the dry-type transformer crossflow cooling fan 1. The air guiding mechanism 2 includes a rectangular air guiding hood 21 located at the air outlet of the dry transformer crossflow cooling fan 1. The rectangular air guiding hood 21 has multiple strip-shaped air outlets arranged vertically on the side near the transformer. The rectangular air guiding hood 21 has multiple baffles 22 that are rotatably arranged on the side near the transformer, each corresponding to one of the multiple strip-shaped air outlets. The air guiding mechanism 2 also includes a control component 23 that controls the baffles 22 to rotate towards or away from the strip-shaped air outlets. The flow guiding component 3 is located on the side near the corresponding high-voltage connecting rod of the transformer and is used to guide the airflow between the three iron core columns of the transformer to the high-voltage terminal. At least one distributed optical fiber temperature measurement component, wherein the temperature measurement optical fiber of the distributed optical fiber temperature measurement component is wound around the transformer, and is used to measure the temperature of the upper end, lower end, iron core and various connection points of the transformer winding.

[0018] This invention uses a distributed fiber optic temperature measurement component to monitor the temperature of key parts of the transformer in real time. When the temperature in a certain area exceeds the standard, the dry-type transformer cross-flow cooling fan 1 is activated. Outside cold air is drawn in through the air inlet away from the transformer side and sent into the rectangular air guide shroud 21 through the top air outlet. The control component 23 drives the corresponding baffle 22 to rotate according to the temperature distribution data, so as to selectively open the strip-shaped air outlet and accurately blow the cold air to the high-temperature area. The airflow between the iron core columns is guided to the high-voltage terminals through the flow guiding component 3, focusing on cooling the weak insulation parts. This achieves intelligent temperature control of "comprehensive monitoring - targeted cooling - efficient heat dissipation", effectively reducing the winding hot spot temperature and ensuring operational safety.

[0019] In one embodiment, the baffle 22 is rotatably connected to the rectangular air guide shroud 21 by a torsion spring, and the baffle 22 flips to a horizontal position when the torsion spring is in its natural state. The control component 23 includes two side plates 231 disposed on the side of the dry-type crossflow cooling fan 1 near the transformer. A screw slide 232 capable of sliding up and down is disposed between the two side plates 231. An electric screw 233 for driving the screw slide 232 to move up and down is also disposed between the two side plates 231. A servo motor 234 is disposed on the screw slide 232. A lever 235 is disposed at the output end of the servo motor 234. When the lever 235 is rotated to its limit towards the side close to the electric screw 233, the baffle 22 is not located within the up and down movement area of ​​the lever 235. When the lever 235 is rotated to its limit away from the electric screw 233, the lever 235 can move down to push the baffle 22 to rotate into the strip-shaped air outlet. The control component 23 also includes a locking component for locking and unlocking the baffle 22 pushed into the strip-shaped air outlet.

[0020] This design utilizes a torsion spring to achieve automatic reset of the baffle 22, and the lead screw slide 232 and electric lead screw 233 form a high-precision lifting drive. The servo motor 234 controls the lever 235 to switch between the "avoidance" and "working" states, achieving precise selectivity and sequential control of the baffle 22. Unselected baffles 22 are not disturbed because they are outside the rotation radius of the lever 235, ensuring the accuracy and reliability of the damper control.

[0021] In one embodiment, each baffle 22 has a groove on the side away from the rectangular air guide shroud 21, and two spring telescopic pins 24 are symmetrically arranged in the groove of each baffle 22. The locking component includes a suspension bracket 236 mounted on the top of a rectangular air guide shroud 21. A guide post 237 is mounted on the top of the suspension bracket 236, penetrating through it. The guide post 237 consists of an anti-detachment section and a movable section located at the bottom of the anti-detachment section. A through-hole is provided on the suspension bracket 236 for the movable section to pass through. The diameter of the anti-detachment section is larger than the diameter of the through-hole. A locking post 238 is mounted at the bottom of the guide post 237, passing sequentially through the grooves of each baffle 22. A compression spring 239 is provided between the locking post 238 and the suspension bracket 236. The locking post 238 moves closer to and further away from the transformer. Multiple sets of inclined guide grooves are provided on one side of the device. When the torsion spring is in its natural state, the spring telescopic pin 24 is located on the side of the locking pin 238 away from the transformer. When the compression spring 239 is in its natural state, the inclined guide groove on the side away from the transformer is located in the rotation area of ​​the spring telescopic pin 24. When the compression spring 239 is in its ultimate compression state, the inclined guide groove on the side closer to the transformer is located in the rotation area of ​​the spring telescopic pin 24. When the lever 235 is rotated to its limit on the side away from the electric screw 233, the lever 235 can push the locking pin 238 upward.

[0022] This design, through the cooperation of the locking pin 238 and the double-sided inclined guide grooves of the spring telescopic pin 24, achieves the mechanical locking and automatic unlocking functions of the baffle 22. When the baffle 22 is closed, the spring telescopic pin 24 is compressed and reset after passing through the inclined guide groove, and is blocked by the locking pin 238 to keep it closed; when unlocking, the lever 235 pushes the locking pin 238 upward, and the spring telescopic pin 24 is guided by the other side of the inclined guide groove to be compressed and reset again. The baffle 22 opens automatically under the action of the torsion spring. No additional driving device is required, the structure is simple and reliable, and the damper is kept stable and does not drift.

[0023] In one embodiment, the current guiding assembly 3 includes a base disposed on the transformer and two current guiding plates disposed on the top of the base. The two current guiding plates are respectively located between two adjacent iron core columns. The current guiding plates are V-shaped plates, and one of their opening sides is located away from the transformer.

[0024] This design, with the V-shaped guide plate embedded in the gap of the iron core column, directs the cooling airflow to the high-voltage terminal area, enhances convective heat transfer, and solves the problem of excessive temperature rise of the high-voltage terminal.

[0025] A transformer temperature control method, utilizing any one of the transformer temperature control devices, includes the following steps: S1. Start the distributed optical fiber temperature measurement component. Through the temperature measurement optical fiber wound on the transformer, the temperature data of the upper end, lower end, iron core and each connection point of the transformer winding are collected in real time to form a multi-dimensional temperature monitoring dataset. S2. Compare the collected temperature data at each point with the preset temperature thresholds to determine whether to trigger the cooling control action. The preset temperature thresholds include the winding safety threshold, the core safety threshold, and the connection point safety threshold. S3. When the temperature data at any point reaches or exceeds the corresponding preset temperature threshold, the dry transformer crossflow cooling fan 1 is started. Outside cold air is drawn in through the air inlet on the side of the dry transformer crossflow cooling fan 1 away from the transformer and sent into the rectangular air guide hood 21 of the air guide mechanism 2 through the top air outlet. S4. By controlling the baffle 22 to rotate through the control component 23, the opening position of each strip air outlet of the rectangular air guide hood 21 is adjusted so that the cold air is directed to the corresponding area where the temperature exceeds the standard. S5. Through the V-shaped guide plate of the guide assembly 3, the airflow between the three iron core columns of the transformer is guided to converge and blow towards the high-voltage terminal. S6. The distributed fiber optic temperature measurement component continuously collects temperature data and dynamically adjusts the angle of the baffle 22 according to the temperature change trend until the temperature at each point is lower than the corresponding preset temperature threshold.

[0026] By adopting the above method, a closed-loop temperature control logic of "monitoring-judgment-start-regulation-guidance-feedback" is formed. Based on multi-point real-time temperature measurement data of distributed optical fiber, the precise and directional allocation of cooling resources is realized, avoiding the energy waste caused by traditional unified cooling. The dynamic adjustment strategy makes the fan power match the heat load in real time, saving energy while providing precise cooling, effectively delaying insulation aging and extending the service life of transformers.

[0027] In one embodiment, the specific process of adjusting and locking the angle of the baffle 22 in step S6 includes: The electric lead screw 233 drives the lead screw slide 232 to move up and down along the side plate 231, driving the servo motor 234 and the lever 235 to move to the position above the baffle 22 corresponding to the normal temperature zone. The servo motor 234 drives the lever 235 to rotate to the limit state away from the electric lead screw 233. The electric lead screw 233 drives the lead screw slide 232 to move down, and the lever 235 pushes the corresponding baffle 22 to rotate downward against the torsion spring force, so that the baffle 22 flips into the strip-shaped air outlet. At this time, the spring telescopic pin 24, guided by the inclined guide groove on the side away from the transformer, first compresses and passes over the locking post 238, and then returns to its original position and extends. It is blocked by the locking post 238 and remains to block the strip-shaped air outlet. When the temperature in the corresponding area drops below the safety threshold, the electric lead screw 233 drives the lead screw slide 232 to move upward until the lever 235 pushes the locking pin 238 upward, causing the inclined guide groove originally below the corresponding spring telescopic pin 24 to move upward. This allows the baffle 22, which was blocked by the locking pin 238 and could not be reset, to be guided by the spring telescopic pin 24 through the inclined guide groove near the transformer under the thrust of the torsion spring reset. The baffle 22 is first compressed past the locking pin 238 and then reset and extended again, so that each baffle 22 returns to its initial state and waits for the next adjustment.

[0028] This design enables selective control of multiple baffles 22 by a single drive source through the combined lifting and rotating motion of the lever 235. The double-sided guide groove structure of the locking pin 238 ensures the stable maintenance and reliable release of the baffle 22, resulting in high system reliability.

[0029] In one embodiment, the preset temperature thresholds in step S2 include a safety threshold, an over-temperature warning threshold, and a limit protection threshold that increase sequentially. In step S3, the operating power of the dry-type cross-flow cooling fan 1 is adjusted in conjunction with the temperature exceeding the limit. When the temperature at the point reaches the over-temperature warning threshold but does not exceed the limit protection threshold, the fan operates at 70%-80% of its rated power. When the temperature at the point reaches the limit protection threshold, the fan immediately switches to 100% of its rated power until the temperature at the corresponding point drops below the safety threshold. Then, the fan switches back to 50% of its rated power and maintains operation for 30 minutes before stopping.

[0030] This design employs a three-level threshold stepped temperature control strategy to achieve intelligent graded adjustment of fan power. When an over-temperature warning occurs, medium to high power is used to quickly suppress the temperature rise. During extreme protection, full power is used for emergency cooling. After the temperature drops, low power is used to maintain operation, eliminating temperature rebound caused by thermal inertia. This ensures cooling effect while avoiding frequent fan start-stop, extending equipment life and resulting in significant energy savings.

[0031] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0033] Additionally, "multiple" refers to two or more.

[0034] The above description is only a preferred embodiment of the present invention and is 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 transformer temperature control device, characterized in that, include: Dry A cross-flow cooling fan (1) is located on the side away from the corresponding high-voltage connecting rod of the transformer. The air inlet of the cross-flow cooling fan (1) is located on the side away from the transformer. The air outlet of the cross-flow cooling fan (1) is located at the top of the cross-flow cooling fan (1). The air guiding mechanism (2) includes a rectangular air guiding hood (21) set at the air outlet of the dry transformer crossflow cooling fan (1). The rectangular air guiding hood (21) has multiple strip-shaped air outlets arranged vertically on the side near the transformer. The rectangular air guiding hood (21) has multiple baffles (22) rotatably set on the side near the transformer, which correspond one-to-one with the multiple strip-shaped air outlets. The air guiding mechanism (2) also includes a control component (23) for controlling the baffles (22) to rotate towards or away from the strip-shaped air outlets. The flow guiding component (3) is located on the side close to the corresponding high-voltage connecting rod of the transformer and is used to guide the airflow between the three iron core columns of the transformer to the high-voltage terminal. At least one distributed optical fiber temperature measurement component, wherein the temperature measurement optical fiber of the distributed optical fiber temperature measurement component is wound around the transformer and is used to measure the temperature of the upper end, lower end, iron core and various connection points of the transformer winding.

2. The transformer temperature control device according to claim 1, characterized in that: The baffle (22) is rotatably connected to the rectangular air guide shroud (21) by a torsion spring. When the torsion spring is in its natural state, the baffle (22) flips to a horizontal position. The control component (23) includes two side plates (231) disposed on the side of the dry-type crossflow cooling fan (1) near the transformer. A screw slide (232) capable of sliding up and down is disposed between the two side plates (231). An electric screw (233) for driving the screw slide (232) to move up and down is also disposed between the two side plates (231). A servo motor (234) is disposed on the screw slide (232). A dial is disposed at the output end of the servo motor (234). When the lever (235) is rotated to its limit near the electric lead screw (233), the baffle (22) is not located within the up-and-down movement area of ​​the lever (235). When the lever (235) is rotated to its limit away from the electric lead screw (233), the lever (235) can move down to push the baffle (22) to rotate into the strip-shaped air outlet. The control component (23) also includes a locking component for locking and unlocking the baffle (22) pushed into the strip-shaped air outlet.

3. The transformer temperature control device according to claim 2, characterized in that: Each of the baffles (22) has a groove on the side away from the rectangular air guide shroud (21), and two spring telescopic pins (24) are symmetrically arranged in the groove of each of the baffles (22). The locking component includes a suspension bracket (236) disposed on the top of a rectangular air guide shroud (21). A guide post (237) is disposed on the top of the suspension bracket (236) and passes through it. The guide post (237) consists of an anti-detachment section and a movable section located at the bottom of the anti-detachment section. A through hole is provided on the suspension bracket (236) for the movable section to pass through. The diameter of the anti-detachment section is larger than the diameter of the through hole. A locking post (238) is disposed at the bottom of the guide post (237) and passes through the grooves of each baffle (22). A compression spring (239) is disposed between the locking post (238) and the suspension bracket (236). Multiple sets of inclined guide grooves are provided on both the side near and away from the transformer. When the torsion spring is in its natural state, the spring telescopic pin (24) is located on the side of the locking pin (238) away from the transformer. When the compression spring (239) is in its natural state, the inclined guide groove on the side away from the transformer is located in the rotation area of ​​the spring telescopic pin (24). When the compression spring (239) is in its ultimate compression state, the inclined guide groove on the side near the transformer is located in the rotation area of ​​the spring telescopic pin (24). When the lever (235) is rotated to its limit on the side away from the electric screw (233), the lever (235) can push the locking pin (238) upward.

4. The transformer temperature control device according to claim 1, characterized in that: The current guiding assembly (3) includes a base on the transformer and two current guiding plates on the top of the base. The two current guiding plates are located between two adjacent iron core columns. The current guiding plates are V-shaped plates, and one of their openings is located away from the transformer.

5. A transformer temperature control method, utilizing the transformer temperature control device according to any one of claims 1-4, characterized in that, Includes the following steps: S1. Start the distributed optical fiber temperature measurement component. Through the temperature measurement optical fiber wound on the transformer, the temperature data of the upper end, lower end, iron core and each connection point of the transformer winding are collected in real time to form a multi-dimensional temperature monitoring dataset. S2. Compare the collected temperature data at each point with the preset temperature threshold to determine whether to trigger the cooling control action. The preset temperature threshold includes the winding safety threshold, the core safety threshold, and the connection point safety threshold. S3. When the temperature data at any point reaches or exceeds the corresponding preset temperature threshold, the dry transformer crossflow cooling fan (1) is started. The outside cold air is drawn in through the air inlet on the side away from the transformer of the dry transformer crossflow cooling fan (1) and sent into the rectangular air guide shroud (21) of the air guide mechanism (2) through the top air outlet. S4. Drive the baffle (22) to rotate by adjusting the control component (23), adjust the opening position of each strip air outlet of the rectangular air guide hood (21), so that the cold air is directed to the corresponding area where the temperature exceeds the standard. S5. Through the V-shaped guide plate of the guide assembly (3), the airflow between the three iron core columns of the transformer is guided to converge and blow towards the high voltage terminal; S6. The distributed optical fiber temperature measurement component continuously collects temperature data and dynamically adjusts the angle of the baffle (22) according to the temperature change trend until the temperature at each point is lower than the corresponding preset temperature threshold.

6. The transformer temperature control method according to claim 5, characterized in that: The specific process of adjusting and locking the angle of the baffle (22) in step S6 includes: The electric lead screw (233) drives the lead screw slide (232) to move up and down along the side plate (231), which in turn drives the servo motor (234) and the lever (235) to move to the position above the baffle (22) corresponding to the normal temperature zone. The servo motor (234) drives the lever (235) to rotate to the limit state away from the electric lead screw (233). The electric lead screw (233) drives the lead screw slide (232) to move down, and the lever (235) pushes the corresponding baffle (22) to rotate downward against the torsion spring force, so that the baffle (22) flips into the strip-shaped air outlet. At this time, the spring telescopic pin (24) is guided by the inclined guide groove on the side away from the transformer. It first compresses and passes over the locking post (238), and then returns to its original position and extends. It is blocked by the locking post (238) and remains to block the strip-shaped air outlet. When the temperature of the corresponding area drops below the safety threshold, the electric lead screw (233) drives the lead screw slide (232) to move upward until the lever (235) pushes the locking pin (238) upward, causing the inclined guide groove originally located below the corresponding spring telescopic pin (24) to move upward. This allows the baffle (22) that was blocked by the locking pin (238) and unable to reset to be guided by the spring telescopic pin (24) through the inclined guide groove near the transformer under the thrust of the torsion spring reset. It first compresses and passes over the locking pin (238) and then resets and extends again, so that each baffle (22) returns to its initial state and waits for the next adjustment.

7. The transformer temperature control method according to claim 5, characterized in that: The preset temperature thresholds mentioned in step S2 include a safety threshold, an over-temperature warning threshold, and a limit protection threshold that increase sequentially. The operating power of the dry-type cross-flow cooling fan (1) mentioned in step S3 is adjusted in conjunction with the temperature exceeding the limit. When the temperature at the point reaches the over-temperature warning threshold but does not exceed the limit protection threshold, the fan operates at 70%-80% of its rated power. When the temperature at the point reaches the limit protection threshold, the fan immediately switches to 100% of its rated power until the temperature at the corresponding point drops below the safety threshold. Then, the fan switches back to 50% of its rated power and maintains operation for 30 minutes before stopping.

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