Oil-immersed transformer cooling system based on semiconductor refrigeration

Abstract

The utility model discloses an oil-immersed transformer cooling system based on semiconductor refrigeration. The oil-immersed transformer cooling system comprises a transformer main body, a transformer temperature detection system, a cooling control system, a semiconductor refrigeration system and an oil circulating pump system, the transformer temperature detection system comprises transformer oil temperature detection, winding temperature detection and load detection; the operation of the transformer cooling oil pump and the semiconductor refrigeration system is flexibly started and stopped through comparison and judgment of the preset oil temperature and the winding control value in the cooling system, a good cooling effect is achieved, complementary operation or independent operation of the transformer cooling oil pump and the semiconductor refrigeration system in different modes is achieved, and the operation efficiency is improved. And meanwhile, the oil circulation speed is automatically adjusted according to the detected temperature, so that the cooling effect is adjusted in real time, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer cooling, in particular to an oil-immersed transformer cooling system based on semiconductor refrigeration. Background Art

[0002] Transformers are commonly used electrical equipment in power systems, used to transform voltage and transmit electrical energy. During the use of transformers, a certain amount of heat will be generated due to the flow of current and the existence of resistance. In order to ensure the normal operation of the transformer and extend the service life of the transformer, the heat dissipation and cooling methods of the transformer must be reasonably designed.

[0003] Oil-immersed transformers use insulating oil as a cooling medium, which has excellent heat dissipation performance and can effectively dissipate the heat generated inside the transformer. Insulating oil has good insulation properties and can effectively protect the electrical components inside the transformer and improve the safety performance of the equipment. The oil-immersed transformer cooling system can effectively prevent air and water vapor from corroding the inside of the transformer and extend the service life of the equipment. The oil-immersed transformer cooling system can effectively control the internal temperature of the transformer and maintain the stable operation state of the equipment. Compared with other types of transformer cooling systems, oil-immersed transformers are more convenient to maintain and have relatively low maintenance costs.

[0004] The main cooling methods for oil-immersed transformers currently include oil-immersed self-cooling, oil-immersed air cooling, forced oil circulation, etc. However, the transformers of existing power substations are installed in outdoor open-air environments. In hot summer weather, the oil temperature of the transformer may rise rapidly due to sun exposure or a sharp increase in power load, which brings huge safety hazards to the operation of the transformer. At the same time, the practical semiconductor cooling of the transformer in the existing technology is single and fixed, and the cooling function cannot be automatically adjusted according to the temperature. The overall cooling effect is poor, and it is impossible to cool a certain part alone, that is, it cannot meet the requirements of oil temperature, winding temperature, etc. during the operation of the transformer. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the above problems in the prior art, the present utility model is proposed.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: an oil-immersed transformer cooling system based on semiconductor refrigeration, which includes a transformer body, a transformer temperature detection system, a cooling control system, a semiconductor refrigeration system and an oil circulation pump system; the transformer temperature detection system includes transformer oil temperature detection, winding temperature detection and load detection; the semiconductor refrigeration system includes a semiconductor refrigeration cold plate, a heat-conductive insulating material, a metal plate, and a radiator; the oil circulation pump system includes a circulation component, including an oil circulation pump, a transmission member arranged on the end face of the oil circulation pump, and a transmission motor arranged on the end face of the transmission member; an adjustment component, including a sleeve arranged on the end face of the transmission member and an adjustment rod slidably arranged inside the sleeve, the transmission member includes a drive shaft sleeved on the end face of the oil circulation pump, a wheel frame arranged on the end face of the drive shaft, a sliding rod slidably arranged inside the wheel frame, a pulley rotatably arranged on the outer wall of the sliding rod and a transmission belt sleeved on the outer wall of the pulley, and a piston is slidably arranged on the inner wall of the adjustment rod.

[0008] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, wherein: the semiconductor refrigeration system of the transformer is partially embedded in the transformer body, and its cold end can directly cool the transformer oil; the semiconductor refrigeration system is composed of multiple semiconductor units; the output end of the transformer oil temperature detection system, the output end of the transformer winding temperature detection system and the output end of the transformer load detection unit are all connected to the transformer temperature detection system; the output end of the transformer temperature detection system is connected to the input end of the cooling control system; the output end of the transformer cooling system control unit is connected to the control end of the transformer oil circulation pump system, the control end of the semiconductor refrigeration system or the power supply end.

[0009] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, wherein: the transformer cooling control system is connected to the transformer temperature detection system, the oil circulation pump system and the semiconductor refrigeration system, and the transformer cooling oil pump and the semiconductor refrigeration system are flexibly started and stopped by comparing and judging the preset oil temperature and winding control value in the cooling system.

[0010] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, when the temperature detected by the transformer temperature detection system is lower than the first preset value of the cooling control system, the oil circulation pump system is controlled by the cooling control system not to start, and the semiconductor refrigeration system is not running or powered on.

[0011] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, wherein: the cooling control system controls the oil circulation pump system to start, and multiple oil circulation pumps are gradually started. After starting one oil circulation pump, after running for a set time period, the temperature detected by the transformer temperature detection system shows a downward trend until the temperature detected by the transformer temperature detection system is lower than the first preset value of the cooling system, and the cooling system controls the started oil circulation pump to exit operation.

[0012] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, after the first oil circulation pump is put into operation, if the transformer temperature detection system detects that the temperature continues to rise, the remaining oil circulation pumps will continue to be started one by one.

[0013] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, if the temperature detected by the transformer temperature detection system shows a downward trend, until the temperature detected by the transformer temperature detection system is lower than the first preset value of the cooling system, the cooling system controls the started oil circulation pump to gradually exit operation.

[0014] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, after all oil circulation pumps are put into operation, if the temperature detected by the transformer temperature detection system does not show a downward trend, the semiconductor refrigeration unit is controlled to operate through the cooling system.

[0015] As a preferred solution of the oil-immersed transformer cooling system based on semiconductor refrigeration described in the utility model, the oil circulation pump system controls the operation of the oil circulation pump through an adjustment mechanism, and when the transformer temperature detection system detects that the temperature rises, the operating speed of the oil circulation pump increases, and the oil circulation speed increases.

[0016] The beneficial effects of the utility model are as follows: the utility model flexibly starts and stops the transformer cooling oil pump and the semiconductor refrigeration system through comparison and judgment of the preset oil temperature and winding control value in the cooling system, has a good cooling effect, and realizes the complementary operation or separate operation of the transformer cooling oil pump and the semiconductor refrigeration system in different modes to meet the requirements of oil temperature, winding temperature, etc. during the operation of the transformer. At the same time, the oil circulation speed is automatically adjusted according to the detected temperature, so as to adjust the cooling effect in real time and save energy and reduce emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 This is the control diagram of the transformer cooling system in the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the oil-immersed transformer cooling system in the utility model.

[0020] Figure 3 It is a schematic diagram of the structure of the semiconductor refrigeration unit in the utility model.

[0021] Figure 4 It is a schematic diagram of the oil circulation pump control system in the utility model.

[0022] Figure 5 It is a schematic diagram of the transmission structure of the utility model.

[0023] Figure 6 It is a schematic diagram of the structure of the adjustment component in the utility model. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Example 1

[0028] Reference Figure 1-3 , which is the first embodiment of the utility model. This embodiment provides an oil-immersed transformer cooling system based on semiconductor refrigeration. Through the comparison and judgment of the preset oil temperature and winding control value in the overcooling system, the transformer cooling oil pump and the semiconductor refrigeration system can be flexibly started and stopped to achieve complementary operation or separate operation of the transformer cooling oil pump and the semiconductor refrigeration system in different modes.

[0029] Specifically, the oil-immersed transformer cooling system based on semiconductor refrigeration includes a transformer body transformer temperature detection system 2, a cooling control system, a semiconductor refrigeration system 4 and an oil circulation pump system 3; the transformer temperature detection system 2 includes transformer oil temperature detection, winding temperature detection and load detection.

[0030] Among them, the semiconductor refrigeration system 4 of the transformer is partially embedded in the transformer body, and its cold end can directly cool the transformer oil; the semiconductor refrigeration system is composed of multiple semiconductor units; the output end of the transformer oil temperature detection system, the output end of the transformer winding temperature detection system and the output end of the transformer load detection unit are all connected to the transformer temperature detection system 2.

[0031] Among them, the output end of the transformer temperature detection system 2 is connected to the input end of the cooling control system; the output end of the transformer cooling system control unit is connected to the control end of the transformer oil circulation pump system 3, the control end or the power supply end of the semiconductor refrigeration system 4.

[0032] Preferably, a schematic diagram of the semiconductor refrigeration unit structure includes a semiconductor refrigeration cold plate 401, a heat-conductive insulating material 402, a metal plate 403, and a radiator 404; the transformer cooling control system is connected to the transformer temperature detection system 2, the oil circulation pump system 3 and the semiconductor refrigeration system 4, etc., and the transformer cooling oil pump and the semiconductor refrigeration system are flexibly started and stopped through comparison and judgment of the preset oil temperature and winding control value in the cooling system, which has a good cooling effect.

[0033] More preferably, when the temperature detected by the transformer temperature detection system 2 is lower than the first preset value of the cooling control system, the cooling control system controls the oil circulation pump system 3 not to start, and the semiconductor refrigeration system 4 not to operate or be powered on.

[0034] Among them, the cooling control system controls the oil circulation pump system 3 to start, and multiple oil circulation pumps are gradually started. After starting one oil circulation pump, after running for a set time period, the temperature detected by the transformer temperature detection system 2 shows a downward trend until the temperature detected by the transformer temperature detection system 2 is lower than the first preset value of the cooling system, and the cooling system controls the started oil circulation pump to exit operation.

[0035] Furthermore, after the first oil circulation pump is put into operation, if the temperature detected by the transformer temperature detection system 2 continues to rise, the other remaining oil circulation pumps will continue to be started one by one; if after the first oil circulation pump is put into operation, if the temperature detected by the transformer temperature detection system 2 continues to rise, the other remaining oil circulation pumps will continue to be started one by one.

[0036] If the temperature detected by the transformer temperature detection system 2 shows a downward trend, until the temperature detected by the transformer temperature detection system 2 is lower than the first preset value of the cooling system, the started oil circulation pump is controlled by the cooling system to gradually exit operation.

[0037] Preferably, after all oil circulation pumps are put into operation, if the temperature detected by the transformer temperature detection system 2 does not show a downward trend, the semiconductor refrigeration unit is controlled by the cooling system to increase or decrease the number of semiconductor operating units according to temperature changes.

[0038] In summary, the utility model patent utilizes a semiconductor refrigeration and cooling system to quickly and directly reduce transformer oil problems. The semiconductor refrigeration units are evenly arranged on the transformer body, and the cold plate directly exchanges heat with the transformer oil, reducing the intermediate heat exchange process and achieving uniform cooling. The overall refrigeration and cooling system achieves a better cooling effect and has application and promotion prospects. By flexibly starting and stopping the transformer cooling oil pump and the semiconductor refrigeration system, it has a better cooling effect, and realizes complementary operation or separate operation of the transformer cooling oil pump and the semiconductor refrigeration system in different modes to meet the requirements of oil temperature, winding temperature, etc. during transformer operation.

[0039] Example 2

[0040] Reference Figure 1 , 3 ~6 is the second embodiment of the utility model. This embodiment is based on the previous embodiment, except that the oil circulation pump system 3 controls the operation of the oil circulation pump through the regulating mechanism. When the transformer temperature detection system 2 detects that the temperature rises, the operating speed of the oil circulation pump increases, thereby increasing the oil circulation speed and circulating more heat to be exported, thereby increasing the cooling effect.

[0041] Specifically, the oil circulation pump system 3 also includes a circulation component K-1, including an oil circulation pump K-2, a transmission component K-3 arranged on the end surface of the oil circulation pump K-2, and a transmission motor K-4 arranged on the end surface of the transmission component K-3; and an adjustment component K-5, including a sleeve K-6 arranged on the end surface of the transmission component K-3 and an adjustment rod K-7 slidably arranged inside the sleeve K-6.

[0042] Among them, the transmission part K-3 includes a driving shaft K-8 mounted on the end face of the oil circulation pump K-2, a wheel frame K-9 arranged on the end face of the driving shaft K-8, a sliding rod K-10 slidingly arranged inside the wheel frame K-9, a pulley K-11 rotatably arranged on the outer wall of the sliding rod K-10, and a transmission belt K-12 mounted on the outer wall of the pulley K-11.

[0043] Preferably, two wheel frames K-9 are provided in parallel and the wheel frame K-9 has a total of five long arms, the slide rods K-10 are arranged in a circular array inside the five long arms of the wheel frame K-9, the pulley K-11 is arranged between the two parallel slide rods K-10 by rotation, and the surface of the pulley K-11 is provided with driven teeth K-27 in a circular array.

[0044] More preferably, a wheel frame K-9 is provided on the end face of the large oil circulation pump K-2 and the transmission motor K-4 respectively, and a transmission belt K-12 is sleeved on the outer walls of the two wheel frames K-9 and slidably connected thereto, and the inner wall of the transmission belt K-12 is meshedly connected with the driven gear K-27.

[0045] Furthermore, a rotating shaft K-13 is rotatably provided at the axis of the wheel frame K-9, the rotating shaft K-13 penetrates into the interior of the wheel frame K-9 and is provided with a turntable K-14, an arc groove K-15 is penetrated through the end surface of the turntable K-14, a sliding column K-16 is provided on the inner wall of the sliding rod K-10, and the sliding column K-16 is slidably provided on the inner wall of the arc groove K-15.

[0046] Among them, the turntable K-14 is circular and has an arc-shaped arc groove K-15 in an array on the circumference of the end face. There are five arc grooves K-15 in total and the center of the circle is biased to the left. Therefore, when the turntable K-14 rotates clockwise, it will drive the slide column K-16 to move toward the outer wall along the arc groove K-15, so that the five slide rods K-10 extend to the circumference of the circle at the same time, driving the pulley K-11 rotatably connected thereto to extend to the circumference of the circle, so that the transmission belt K-12 mounted on the outer wall of the pulley K-11 is expanded outward.

[0047] Furthermore, the rotating shaft K-13 is arranged at one end of the wheel frame K-9 away from the oil circulation pump K-2 and the transmission motor K-4. The rotating shaft K-13 is rotatably connected to the wheel frame K-9 through a thread, so that after the adjustment of the rotating shaft K-13 is completed, the thread is automatically locked to prevent the slide rod K-10 from retracting. At the same time, the rotating shaft K-13 and the turntable K-14 are slidably connected through a flat key. The rotating shaft K-13 and the turntable K-14 can rotate together and the rotating shaft K-13 can slide relatively inside the turntable K-14.

[0048] In summary, during use, when the transformer temperature detection system 2 detects that the temperature has risen, the oil circulation pump system 3 starts to operate, and the cooling oil is driven by the oil circulation pump K-2 to bring out the heat. At this time, the staff only needs to rotate the shaft K-13 at one end of the oil circulation pump K-2 to make the shaft K-13 rotate counterclockwise. At this time, the turntable K-14 connected to the shaft K-13 also rotates counterclockwise. At this time, the slide column K-16 slides toward the center of the turntable K-14 inside the arc groove K-15, and the five slide rods K-16 retract at the same time, driving the pulley K-11 to shrink inward, and the transmission belt K-12 sleeved on the outer wall of the pulley K-11 is retracted, thereby increasing the transmission gear ratio. When the transmission motor K-4 works under the set speed condition, the speed of the oil circulation pump K-2 increases, thereby increasing the oil circulation speed, circulating more heat and exporting it, increasing the cooling effect; at the same time, the shaft K-13 can also be adjusted in the reverse direction to adjust the cooling rate.

[0049] Example 3

[0050] Reference Figures 1 to 6 , which is the third embodiment of the utility model, is based on the previous embodiment, except that after the transformer temperature detection system 2 detects a temperature rise, the adjustment component K-5 automatically controls the adjustment rod K-7 to slide inside the sleeve K-6 to adjust the cooling rate.

[0051] Specifically, the sleeve K-6 is fixed on the end face of the wheel frame K-9 away from the end of the oil circulation pump K-2. The sleeve K-6 is a hollow cylinder. The rotating shaft K-13 slides through the interior of the sleeve K-6 and is connected to the rotating column K-16. The outer wall of the rotating column K-16 is also provided with a rotating groove K-25, and the inner wall of the sleeve K-6 is provided with a rotating column K-18.

[0052] Among them, the rotating column K-18 is slidably arranged inside the rotating groove K-25, the rotating column K-16 is cylindrical and the rotating column K-16 is rotatably arranged inside the sleeve K-6, and the rotating groove K-25 is a two-circle complete spiral groove. When the rotating column K-16 moves, the rotating column K-18 slides along the rotating groove K-25, and the rotating column K-18 itself is fixed, so that the rotating column K-16 itself rotates and slides downward, and at the same time, the rotating shaft K-16 is connected to the rotating shaft K-16 and rotates accordingly.

[0053] More preferably, the adjusting rod K-7 is vertically arranged on the outer wall of the sleeve K-6 and penetrates therewith, and a piston K-17 is slidably provided on the inner wall of the adjusting rod K-7. The adjusting rod K-7 is also a single-ended open cylinder, so that the piston K-17, the inner wall of the adjusting rod K-7, the inner wall of the sleeve K-6 and the rotating column K-16 together form a closed cavity K-26, and hydraulic oil is provided in the closed cavity K-26.

[0054] Furthermore, there are two sets of sleeves K-6 and adjusting rods K-7, which are respectively arranged on the outside of the wheel frame K-9 on both sides of the oil circulation pump K-2 and the transmission motor K-4. An elastic member is provided between the inner wall of the adjusting rod K-7 on one side of the transmission motor K-4 and the piston K-17, so that the pistons K-17 on both sides automatically rebound and reset at normal temperature.

[0055] Preferably, a connecting rod K-18 is provided between the pistons K-17 on both sides, and a balancing column K-19 is vertically sleeved on the outer wall of the connecting rod K-18. A balancing rod K-20 is vertically provided on the end face of the balancing column K-19. The balancing rod K-20 is parallel to the direction of the adjusting rod K-7. A tank body K-21 is slidably sleeved on the outer wall of the balancing rod K-20. The tank body K-21 is fixedly arranged, and the balancing rod K-20 slides through the interior of the tank body K-21 and is provided with a sealing cover K-22.

[0056] Among them, the sealing cover K-22 is slidably arranged inside the tank body K-21, and the sealing cover K-22 and the inside of the tank body K-21 form a sealed cavity, and the sealed cavity is filled with alcohol. The air pressure change generated by the volatilization of alcohol when heated pushes the sealing cover K-22 to slide.

[0057] More preferably, a second elastic member K-23 is provided between the sealing cover K-22 and the other end of the inner wall of the tank body K-21. The second elastic member K-23 is a spring. The two ends of the second elastic member K-23 are respectively fixedly connected to the inner wall of the tank body K-21 and the outer wall of the sealing cover K-22, so that under the push of the second elastic member K-23, the sealing cover K-22 can automatically reset to its initial state.

[0058] In summary, when the temperature changes during use, the alcohol inside the tank K-21 at one end of the oil circulation pump K-2 is heated and evaporated into gas, thereby increasing the air pressure in the air cavity inside the tank K-21 and pushing the sealing cover K-22 to move outward, while driving the balance rod K-20 and the balance column K-19 to slide along the axial direction of the connecting rod K-18, and driving the connecting rod K-18 and the two pistons K-17 to move. At this time, one side of the sleeve K-6 and the adjusting rod K-7 on both sides is compressed and the other side is stretched, that is, When the pressure on one side of the cavity increases and the pressure on the other side decreases, the rotating column K-16 on one side of the oil circulation pump K-2 rotates outward, and the rotating column K-16 on the other side rotates inward, so that the diameter of the transmission belt K-12 on one side of the oil circulation pump K-2 decreases, thereby increasing the transmission ratio and increasing the speed of the oil circulation pump K-2, thereby automatically improving the cooling efficiency. When the temperature drops, it automatically resets under the rebound of the elastic part, thereby automatically reducing the speed and oil circulation efficiency of the oil circulation pump K-2 and reducing power and resource consumption.

[0059] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0060] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0061] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An oil-immersed transformer cooling system based on semiconductor refrigeration, characterized in that: The invention comprises a transformer body, a transformer temperature detection system (2), a cooling control system, a semiconductor refrigeration system (4) and an oil circulation pump system (3); the transformer temperature detection system (2) comprises transformer oil temperature detection, winding temperature detection and load detection; the semiconductor refrigeration system (4) comprises a semiconductor refrigeration cold plate (401), a heat-conductive insulating material (402), a metal plate (403) and a radiator (404); the oil circulation pump system (3) comprises a circulation component (K-1), comprising an oil circulation pump (K-2), a transmission member (K-3) arranged on the end surface of the oil circulation pump (K-2), and a transmission motor (K-4) arranged on the end surface of the transmission member (K-3); The adjusting assembly (K-5) comprises a sleeve (K-6) arranged on the end surface of the transmission member (K-3) and an adjusting rod (K-7) slidably arranged inside the sleeve (K-6); the transmission member (K-3) comprises a driving shaft (K-8) sleeved on the end surface of the oil circulation pump (K-2), a wheel frame (K-9) arranged on the end surface of the driving shaft (K-8), a sliding rod (K-10) slidably arranged inside the wheel frame (K-9), a pulley (K-11) rotatably arranged on the outer wall of the sliding rod (K-10) and a transmission belt (K-12) sleeved on the outer wall of the pulley (K-11); a piston (K-17) is slidably arranged on the inner wall of the adjusting rod (K-7).

2. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 1, characterized in that: The semiconductor refrigeration system (4) of the transformer is partially embedded in the transformer body, and its cold end can directly cool the transformer oil; the semiconductor refrigeration system is composed of a plurality of semiconductor units; The output end of the transformer oil temperature detection system, the output end of the transformer winding temperature detection system and the output end of the transformer load detection unit are all connected to the transformer temperature detection system (2); The output end of the transformer temperature detection system (2) is connected to the input end of the cooling control system; The output end of the transformer cooling system control unit is connected to the control end of the transformer oil circulation pump system (3), the control end of the semiconductor refrigeration system (4) or the power supply end.

3. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 2, characterized in that: The transformer cooling control system is connected to the transformer temperature detection system (2), the oil circulation pump system (3) and the semiconductor refrigeration system (4), and flexibly starts and stops the transformer cooling oil pump and the semiconductor refrigeration system by comparing and judging the preset oil temperature and winding control value in the cooling system.

4. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 3, characterized in that: When the temperature detected by the transformer temperature detection system (2) is lower than the first preset value of the cooling control system, the cooling control system controls the oil circulation pump system (3) not to start, and the semiconductor refrigeration system (4) not to operate or be powered on.

5. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 4, characterized in that: The cooling control system controls the oil circulation pump system (3) to start, and the plurality of oil circulation pumps are gradually started. After one oil circulation pump is started, after running for a set period of time, the temperature detected by the transformer temperature detection system (2) shows a downward trend, until the temperature detected by the transformer temperature detection system (2) is lower than a first preset value of the cooling system, and the cooling system controls the started oil circulation pump to stop running.

6. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 5, characterized in that: After the first oil circulation pump is put into operation, if the temperature detected by the transformer temperature detection system (2) continues to rise, the remaining oil circulation pumps are started one by one.

7. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 6, characterized in that: If the temperature detected by the transformer temperature detection system (2) shows a downward trend, until the temperature detected by the transformer temperature detection system (2) is lower than the first preset value of the cooling system, the cooling system controls the started oil circulation pump to gradually stop running.

8. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 7, characterized in that: After all oil circulation pumps are put into operation, if the temperature detected by the transformer temperature detection system (2) does not show a downward trend, the semiconductor refrigeration unit is controlled to operate through the cooling system.

9. The oil-immersed transformer cooling system based on semiconductor refrigeration according to claim 8, characterized in that: The oil circulation pump system (3) controls the operation of the oil circulation pump through an adjustment mechanism. When the transformer temperature detection system (2) detects that the temperature rises, the operation speed of the oil circulation pump increases, and the oil circulation speed increases.

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