Dynamic auxiliary heat dissipation device for oil-immersed transformer and control method

Abstract

The invention provides a dynamic auxiliary heat dissipation device for an oil-immersed transformer and a control method, and relates to the technical field of heat dissipation, and the dynamic auxiliary heat dissipation device comprises a cooling fin clamping plate, a first steering engine, a first bracket, a second bracket, a radiation refrigeration plate, a solar photovoltaic plate and a heat conduction silica gel sheet. The cooling fin clamping plate is of a hollow structure and comprises a clamping plate body with bolt holes formed in the two sides and a hollow part connected with the cooling fin. The first steering engine is installed on the upper surface of the cooling fin clamping plate. An output shaft is connected with the bottom of the first support. The bottom of the second support is connected with the top of the first support through a second steering engine. The radiation refrigeration plate is mounted at the top of the second bracket and is connected with the cooling fin clamping plate through the heat-conducting silica gel sheet; the solar photovoltaic panel is connected in parallel with one end of the radiation refrigeration panel away from the radiating fins through a third support. Heat exchange between the radiation refrigeration plate and the space serves as a heat dissipation means, electric energy is provided for the device through the solar photovoltaic plate, the angles of the radiation refrigeration plate and the solar photovoltaic plate are adjusted in real time, and the heat dissipation efficiency and the power generation efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation, and in particular to a dynamic auxiliary heat dissipation device and a control method for an oil-immersed transformer. Background Art

[0002] Excessive hot spot temperature will seriously affect the service life of the transformer. The current relevant standards point out that when the hot spot temperature of an oil-immersed transformer reaches 98°C, the relative aging rate of the transformer insulation will double for every 6°C increase in the hot spot temperature. In recent years, the heat dissipation problem of transformers has become increasingly prominent. On the one hand, as my country's electricity consumption level has increased significantly, the load on the power grid has increased rapidly; on the other hand, as global warming accelerates and intensifies, the temperature is getting higher and higher. For the transformers that have been put into operation, when the transformer exceeds the temperature limit, the operation and maintenance units generally use auxiliary heat dissipation methods such as water flushing, ice cubes, and fans. Water flushing and ice cube auxiliary heat dissipation methods are inefficient, time-consuming and labor-intensive, and fan-assisted heat dissipation methods consume a lot of energy and make a lot of noise. In addition, there are auxiliary heat dissipation devices based on phase change materials, which are prone to contraction and expansion caused by liquid-gas conversion, resulting in liquid leakage in the device, which poses certain safety hazards. Summary of the invention

[0003] The purpose of the present invention is to provide a dynamic auxiliary heat dissipation device and control method for an oil-immersed transformer to solve the above problems. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0004] On the one hand, the present application provides a dynamic auxiliary heat dissipation device for an oil-immersed transformer, comprising: a heat sink clamp, a first steering gear, a first bracket, a second bracket, a radiation cooling plate, a solar photovoltaic panel and a thermally conductive silicone sheet. The heat sink clamp is a hollow structure, comprising clamps on both sides and a hollow part, the clamps on both sides are provided with bolt holes, and the hollow part is connected to the heat sink; the first steering gear is mounted on the upper surface of the heat sink clamp; the bottom of the first bracket is connected to the output shaft of the first steering gear; the bottom of the second bracket is connected to the top of the first bracket through the second steering gear; the radiation cooling plate is mounted on the top of the second bracket; the solar photovoltaic panel is connected in parallel to one end of the radiation cooling plate away from the heat sink through the third bracket; one end of the thermally conductive silicone sheet is connected to the heat sink clamp and the other end is connected to the radiation cooling plate.

[0005] On the other hand, the present application provides a control method for a dynamic auxiliary heat dissipation device for an oil-immersed transformer, comprising:

[0006] Shielding the device from light, obtaining the values ​​detected by the first light sensor, the second light sensor, the third light sensor, and the fourth light sensor, and if any value is not 0, adjusting the resistor of the corresponding light sensor until all the values ​​are 0;

[0007] The light shielding of the device is cancelled, and the device is fixed to the heat sink of the oil-immersed transformer by bolts matching the bolt holes of the clamping plates on both sides of the heat sink clamping plate;

[0008] Respectively obtain a first value, a second value, a third value, and a fourth value collected by the first light sensor, the second light sensor, the third light sensor, and the fourth light sensor;

[0009] According to the first value, the second value, the third value and the fourth value, a rotation direction and a rotation angle of the first steering gear and a rotation direction and a rotation angle of the second steering gear are calculated;

[0010] Controlling the first steering gear to rotate according to the rotation direction and rotation angle of the first steering gear;

[0011] The second steering gear is controlled to rotate according to the rotation direction and rotation angle of the second steering gear.

[0012] The beneficial effects of the present invention are:

[0013] The present invention uses a radiation cooling plate and space heat exchange as an auxiliary heat dissipation means for an oil-immersed transformer, and uses a solar photovoltaic panel to provide power to a microprocessor, multiple sensors, and multiple steering gears, so that the device does not need to be connected to an additional power supply. Through the cooperation between multiple sensors, microprocessors, multiple steering gears and brackets, the radiation cooling plate and the solar photovoltaic panel can adjust their angles in real time to face the sun, thereby improving the heat dissipation efficiency of the radiation cooling plate and the power generation efficiency of the solar photovoltaic panel.

[0014] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a front and side perspective schematic diagram of a dynamic auxiliary heat dissipation device for an oil-immersed transformer;

[0017] Figure 2 It is a three-dimensional schematic diagram of the rear side of the dynamic auxiliary heat dissipation device of the oil-immersed transformer;

[0018] Figure 3 It is a side view of a dynamic auxiliary heat dissipation device for an oil-immersed transformer;

[0019] Figure 4 This is the overall installation diagram of the dynamic auxiliary heat dissipation device for oil-immersed transformers;

[0020] Figure 5 Schematic diagram of a dynamic auxiliary heat dissipation device for an oil-immersed transformer installed on a single heat sink.

[0021] Markings in the figure: 1. Heat sink clamp; 2. Thermal conductive silicone sheet; 3. First bracket; 4. Second bracket; 5. Third bracket; 6. Solar photovoltaic panel; 7. Radiant cooling panel; 8. First servo; 9. Second servo; 10. First light sensor; 11. Second light sensor; 12. Third light sensor; 13. Fourth light sensor; 14. Protective casing; 15. Oil-immersed transformer; 16. Heat sink. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Embodiment 1:

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a dynamic auxiliary heat dissipation device for an oil-immersed transformer, comprising: a heat sink clamp 1, a first servo 8, a first bracket 3, a second bracket 4, a radiation cooling plate 7, a solar photovoltaic panel 6 and a thermally conductive silicone sheet 2.

[0026] The heat sink clamping plate 1 has a hollow structure, including clamping plates on both sides and a hollow part. The clamping plates on both sides are provided with bolt holes, and the hollow part is connected to the heat sink 16. The heat sink clamping plate 1 is made of a material with high thermal conductivity, and is used to install the whole device onto the heat sink 16 of the oil-immersed transformer 15 and conduct the heat of the heat sink 16 to the device.

[0027] In this embodiment, the specific shape of the hollow part is that the cross-section of the heat sink clamping plate 1 is in a "冂" shape, that is, the top surface of the heat sink clamping plate 1 is connected to the clamping plates on both sides, and the bottom surface is in an open state.

[0028] As Figure 4 and Figure 5 shown, when the heat sink clamping plate 1 is installed onto the heat sink 16, first place the top surface of the heat sink clamping plate 1 on the top end of the heat sink 16, make one side clamping plate of the heat sink clamping plate 1 closely adhere to the surface of the heat sink 16, and then cooperate the bolts with the bolt holes on the clamping plates on both sides to clamp the heat sink 16. On the one hand, the top end of the heat sink 16 bears part of the weight of the device, making the installation of the device more stable. On the other hand, the heat sink 16 is closely attached to the top surface and one side clamping plate of the heat sink clamping plate 1, enabling the heat on the heat sink 16 to be better conducted to the heat sink clamping plate 1.

[0029] The first servo motor 8 is installed on the upper surface of the heat sink clamping plate 1. The bottom of the first bracket 3 is connected to the output shaft of the first servo motor 8. The bottom of the second bracket 4 is connected to the top of the first bracket 3 through the second servo motor 9. The radiation cooling plate 7 is installed on the top of the second bracket 4. The solar photovoltaic panel 6 is connected in parallel to one end of the radiation cooling plate 7 away from the heat sink 16 through the third bracket 5, and the working surfaces of the solar photovoltaic panel 6 and the radiation cooling plate 7 are in the same plane.

[0030] It should be noted that the output shaft of the first servo motor 8 is installed vertically. When the first servo motor 8 works, the radiation cooling plate 7 and the solar photovoltaic panel 6 rotate with the output shaft of the first servo motor 8 as the rotation axis. The output shaft of the second servo motor 9 is installed horizontally. When the second servo motor 9 works, the radiation cooling plate 7 and the solar photovoltaic panel 6 rotate with the output shaft of the second servo motor 9 as the rotation axis.

[0031] One end of the thermal conductive silica gel sheet 2 is connected to the heat sink clamping plate 1, and the other end is connected to the radiation cooling plate 7. The thermal conductive silica gel sheet 2 has high thermal conductivity and is used to conduct the heat of the heat sink clamping plate 1 to the radiation cooling plate 7.

[0032] The device also includes a first light sensor 10, a second light sensor 11, a third light sensor 12 and a fourth light sensor 13; the first light sensor 10 and the second light sensor 11 are respectively installed on the two corners of the solar photovoltaic panel 6 away from the heat sink 16; the third light sensor 12 and the fourth light sensor 13 are respectively installed on the two corners of the radiation cooling plate 7 close to the heat sink 16.

[0033] It can be understood that the four light sensors are used to collect light intensity data, and the different light intensity data collected by the light sensors at different positions represent different distances between the locations where the light sensors are installed and the sun.

[0034] The device also includes a protective shell 14 with a microprocessor inside, the protective shell 14 is installed on the heat sink clamp 1, and the microprocessor is electrically connected to the first steering gear 8, the second steering gear 9, the first light sensor 10, the second light sensor 11, the third light sensor 12 and the fourth light sensor 13 respectively.

[0035] The microprocessor is a 51 series single-chip microcomputer of STC89C52RC. The light intensity data collected by four light sensors is used to obtain the distances of the four light sensors relative to the sun. The microprocessor controls the first servo 8 and the second servo 9 to rotate, and changes the angles of the radiation cooling plate 7 and the solar photovoltaic panel 6 in real time, as well as the positions of the four light sensors located on the surfaces of the radiation cooling plate 7 and the solar photovoltaic panel 6. By making the distances of the four light sensors relative to the sun the same, the radiation cooling plate 7 and the solar photovoltaic panel 6 are always facing the sun, which can maximize the radiation heat exchange power and the power generation power of the solar photovoltaic panel 6.

[0036] The maximum rotation angle of the first steering gear 8 and the second steering gear 9 is 270°.

[0037] The radiation cooling plate 7 includes an aluminum plate and a radiation cooling material, and the radiation cooling material is evenly coated on the surface of the aluminum plate. The radiation cooling plate 7 uses thermal radiation to radiate the heat conducted from the heat sink 16 to outer space, thereby cooling the heat sink 16.

[0038] It should be noted that the aluminum plate is selected to reduce the cost of the device, and other materials with high thermal conductivity can also be selected to evenly coat the radiation cooling material on its surface.

[0039] According to the Stefan-Boltzmann law, the calculation formula for radiation heat transfer power is as follows:

[0040]

[0041] In the formula, q rrepresents the radiation heat transfer power; ε represents the emissivity of the surface of the radiation cooling plate 7; σ represents the Stefan-Boltzmann constant; T t represents the surface temperature of the radiation cooling plate 7; T e Indicates the surface temperature of the radiation heat transfer object.

[0042] It can be seen from the above formula that the radiation heat exchange power depends on the temperature difference between the surface of the radiation cooling plate 7 and the surface of the radiation heat exchange object. Therefore, allowing the radiation cooling plate 7 to exchange radiation heat with the object with a lower temperature as much as possible can maximize the radiation heat exchange power.

[0043] Therefore, the radiation heat exchange object in this application is space, where the temperature is 3K, much lower than the temperature of objects on the earth's surface. It is known that the transmittance of the atmosphere is high at 8-13um, and solar radiation is mainly concentrated in the 0-2.5um band. The emissivity of the surface of the radiation cooling plate 7 is regulated by the radiation cooling material, so that the emissivity of the surface of the radiation cooling plate 7 has a higher emissivity in the 8-13um band, and at the same time, the reflectivity of the surface of the radiation cooling plate 7 is high in the solar radiation band, so that radiation heat exchange can occur with space, and the device can also be protected from the effects of solar radiation.

[0044] The hollow part is 30 mm thick and can be installed on heat sinks 16 of different thicknesses through bolts that cooperate with the bolt holes on the clamping plates on both sides. The thickness of the heat sink 16 is between 0-30 mm. Therefore, this application has high universality and is suitable for heat sinks 16 of different thicknesses.

[0045] The output voltage of the solar photovoltaic panel 6 is 5V, which is used to power the microprocessor, the first servo 8, the second servo 9, the first light sensor 10, the second light sensor 11, the third light sensor 12 and the fourth light sensor 13. There is no need to connect an additional power supply, making the device safe and reliable, and ensuring the safe operation of the oil-immersed transformer 15.

[0046] Embodiment 2:

[0047] This embodiment provides a control method for a dynamic auxiliary heat dissipation device for an oil-immersed transformer, comprising:

[0048] S100, shielding the device from light, obtaining the values ​​detected by the first light sensor 10, the second light sensor 11, the third light sensor 12 and the fourth light sensor 13, and if any value is not 0, adjusting the resistor of the corresponding light sensor until all the values ​​are 0.

[0049] It can be understood that the purpose of step S100 is to calibrate the first light sensor 10, the second light sensor 11, the third light sensor 12 and the fourth light sensor 13 to avoid the influence of the original values ​​of the first light sensor 10, the second light sensor 11, the third light sensor 12 and the fourth light sensor 13 on the device.

[0050] S200, cancel the light shielding of the device, and fix the device to the heat sink 16 of the oil-immersed transformer 15 by bolts engaging with the bolt holes of the clamping plates on both sides of the heat sink clamping plate 1;

[0051] S300 , respectively obtaining first values, second values, third values, and fourth values ​​collected by the first light sensor 10 , the second light sensor 11 , the third light sensor 12 , and the fourth light sensor 13 .

[0052] It can be understood that the data returned by the first light sensor 10, the second light sensor 11, the third light sensor 12 and the fourth light sensor 13 are analog signals, which are converted into digital signals by the analog-to-digital conversion module of the microprocessor to obtain the first value, the second value, the third value and the fourth value.

[0053] If the first value, the second value, the third value and the fourth value are all 0, it indicates that there is no solar radiation in the external environment at this time, the external environment is cloudy or at night, and the high temperature of the oil-immersed transformer 15 caused by the high temperature environment is also alleviated, so the first steering gear 8 and the second steering gear 9 are not required to work.

[0054] S400, if the first value, the second value, the third value and the fourth value are not all 0, then calculating according to the first value, the second value, the third value and the fourth value, obtaining the rotation direction and the rotation angle of the first steering gear 8 and the rotation direction and the rotation angle of the second steering gear 9;

[0055] The second light sensor 11 and the third light sensor 12 are located on the same side, and the first light sensor 10 and the fourth light sensor 13 are located on the same side. Step S400 includes:

[0056] S401, calculating an average of the first value, the second value, the third value and the fourth value;

[0057] S402, subtracting the second value from the first value to obtain a first difference;

[0058] S403, subtracting the third value from the fourth value to obtain a second difference;

[0059] S404, judging whether the first difference and the second difference are positive or negative, and obtaining a first judgment result;

[0060] S405, if the first judgment result is positive, the first steering gear 8 rotates in a direction in which the first light sensor 10 is away from the sun and the second light sensor 11 is close to the sun; if the first judgment result is negative, the first steering gear 8 rotates in a direction in which the first light sensor 10 is close to the sun and the second light sensor 11 is away from the sun, and the rotation direction of the first steering gear 8 is obtained;

[0061] S406, adding the absolute value of the first difference to the absolute value of the second difference, dividing the result by the average value, and then multiplying the result by the rotation coefficient of the first steering gear 8 and the maximum rotation angle of the first steering gear 8 to obtain the rotation angle of the first steering gear 8. The expression of the rotation angle of the first steering gear 8 is:

[0062]

[0063] Wherein, θ1 represents the rotation angle of the first steering gear 8; k1 represents the rotation coefficient of the first steering gear 8; S1 represents the first value collected by the first light sensor 10; S2 represents the second value collected by the second light sensor 11; S3 represents the third value collected by the third light sensor 12; S4 represents the third value collected by the fourth light sensor 13; S0 represents the average value of the first value, the second value, the third value and the fourth value; θ a Indicates the maximum rotation angle of the first steering gear 8.

[0064] S407, subtracting the fourth value from the first value to obtain a third difference;

[0065] S408, subtracting the third value from the second value to obtain a fourth difference;

[0066] S409, judging whether the third difference and the fourth difference are positive or negative, and obtaining a second judgment result;

[0067] S410, if the second judgment result is positive, the second steering gear 9 rotates in a direction in which the first light sensor 10 is away from the sun and the fourth light sensor 13 is close to the sun; if the second judgment result is negative, the second steering gear 9 rotates in a direction in which the first light sensor 10 is close to the sun and the fourth light sensor 13 is away from the sun, and the rotation direction of the second steering gear 9 is obtained;

[0068] S411, adding the absolute value of the third difference to the absolute value of the fourth difference, dividing the result by the average value, and then multiplying the result by the rotation coefficient of the second steering gear 9 and the maximum rotation angle of the second steering gear 9 to obtain the rotation angle of the second steering gear 9. The expression of the rotation angle of the second steering gear 9 is:

[0069]

[0070] Wherein, θ2 represents the rotation angle of the second servo 9; k2 represents the rotation coefficient of the second servo 9; S1 represents the first value collected by the first light sensor 10; S2 represents the second value collected by the second light sensor 11; S3 represents the third value collected by the third light sensor 12; S4 represents the third value collected by the fourth light sensor 13; S0 represents the average value of the first value, the second value, the third value and the fourth value; θ b Indicates the maximum rotation angle of the second steering gear 9.

[0071] S500, controlling the first steering gear 8 to rotate according to the rotation direction and rotation angle of the first steering gear 8;

[0072] S600: Control the second steering gear 9 to rotate according to the rotation direction and rotation angle of the second steering gear 9.

[0073] Steps S400 to S600 cause the first servo 8 and the second servo 9 to rotate, and change the angles of the radiation cooling panel 7 and the solar photovoltaic panel 6 in real time, so that the radiation cooling panel 7 and the solar photovoltaic panel 6 are always facing the solar radiation, thereby maximizing the heat dissipation efficiency of the radiation cooling panel 7 and the power generation efficiency of the solar photovoltaic panel 6, improving the heat dissipation efficiency of the heat sink 16, and assisting the oil-immersed transformer 15 in cooling down.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0075] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dynamic auxiliary heat dissipation device for an oil-immersed transformer, characterized in that: include: A heat sink clamp (1), the heat sink clamp (1) being a hollow structure, comprising clamps on two sides and a hollow portion, the clamps on both sides being provided with bolt holes, and the hollow portion being connected to a heat sink (16); A first steering gear (8), the first steering gear (8) being mounted on the upper surface of the heat sink clamping plate (1); A first bracket (3), the bottom of the first bracket (3) being connected to an output shaft of a first steering gear (8); A second bracket (4), the bottom of the second bracket (4) being connected to the top of the first bracket (3) via a second steering gear (9); A radiation cooling plate (7), wherein the radiation cooling plate (7) is mounted on the top of the second bracket (4); A solar photovoltaic panel (6), wherein the solar photovoltaic panel (6) is connected in parallel to an end of the radiation cooling plate (7) away from the heat sink (16) via a third bracket (5); A heat-conducting silicone sheet (2), wherein one end of the heat-conducting silicone sheet (2) is connected to the heat sink clamping plate (1) and the other end is connected to the radiation cooling plate (7).

2. The dynamic auxiliary heat dissipation device for oil-immersed transformer according to claim 1 is characterized in that: The device further comprises a first light sensor (10), a second light sensor (11), a third light sensor (12) and a fourth light sensor (13); the first light sensor (10) and the second light sensor (11) are respectively mounted on two corners of the solar photovoltaic panel (6) away from the heat sink (16); and the third light sensor (12) and the fourth light sensor (13) are respectively mounted on two corners of the radiation cooling plate (7) close to the heat sink (16).

3. The dynamic auxiliary heat dissipation device for oil-immersed transformer according to claim 2 is characterized in that: The device also includes a protective shell (14) with a microprocessor inside, the protective shell (14) is mounted on the heat sink clamp (1), and the microprocessor is electrically connected to the first steering gear (8), the second steering gear (9), the first light sensor (10), the second light sensor (11), the third light sensor (12) and the fourth light sensor (13).

4. The dynamic auxiliary heat dissipation device for oil-immersed transformer according to claim 1, characterized in that: The maximum rotation angle of the first steering gear (8) and the second steering gear (9) is 270°.

5. The dynamic auxiliary heat dissipation device for oil-immersed transformer according to claim 1, characterized in that: The radiation refrigeration plate (7) comprises an aluminum plate and a radiation refrigeration material, and the radiation refrigeration material is evenly coated on the surface of the aluminum plate.

6. The dynamic auxiliary heat dissipation device for oil-immersed transformer according to claim 3, characterized in that: The model of the microprocessor is a 51 series single chip microcomputer of STC89C52RC.

7. The dynamic auxiliary heat dissipation device for oil-immersed transformer according to claim 1, characterized in that: The thickness of the hollow part is 30 mm.

8. A control method for a dynamic auxiliary heat dissipation device of an oil-immersed transformer, characterized in that: include: The device is shielded from light, and the values ​​detected by the first light sensor (10), the second light sensor (11), the third light sensor (12), and the fourth light sensor (13) are obtained. If any value is not 0, the resistor of the corresponding light sensor is adjusted until all the values ​​are 0; The light shielding of the device is eliminated, and the device is fixed to the heat sink (16) of the oil-immersed transformer (15) by means of bolts engaging with the bolt holes of the clamping plates on both sides of the heat sink clamping plate (1); Respectively obtaining a first value, a second value, a third value and a fourth value collected by the first light sensor (10), the second light sensor (11), the third light sensor (12) and the fourth light sensor (13); Calculating according to the first value, the second value, the third value and the fourth value, obtaining the rotation direction and rotation angle of the first steering gear (8) and the rotation direction and rotation angle of the second steering gear (9); controlling the first steering gear (8) to rotate according to the rotation direction and rotation angle of the first steering gear (8); The second steering gear (9) is controlled to rotate according to the rotation direction and rotation angle of the second steering gear (9).

9. The control method of the dynamic auxiliary heat dissipation device for an oil-immersed transformer according to claim 8, wherein the second light sensor (11) and the third light sensor (12) are located on the same side, and the first light sensor (10) and the fourth light sensor (13) are located on the same side, characterized in that: The calculation is performed according to the first value, the second value, the third value and the fourth value to obtain the rotation direction and the rotation angle of the first steering gear (8) and the rotation direction and the rotation angle of the second steering gear (9), including: Calculate an average of the first value, the second value, the third value, and the fourth value; Subtract the second value from the first value to obtain a first difference; Subtract the third value from the fourth value to obtain a second difference; Determine whether the first difference and the second difference are positive or negative, and obtain a first determination result; If the first judgment result is positive, the first steering engine (8) rotates in a direction in which the first light sensor (10) is away from the sun and the second light sensor (11) is close to the sun; if the first judgment result is negative, the first steering engine (8) rotates in a direction in which the first light sensor (10) is close to the sun and the second light sensor (11) is away from the sun, thereby obtaining the rotation direction of the first steering engine (8); The absolute value of the first difference is added to the absolute value of the second difference, divided by the average value, and then multiplied by the rotation coefficient of the first steering gear (8) and the maximum rotation angle of the first steering gear (8), to obtain the rotation angle of the first steering gear (8).

10. The control method of the dynamic auxiliary heat dissipation device of an oil-immersed transformer according to claim 9, characterized in that: The method further comprises: calculating according to the first value, the second value, the third value and the fourth value, obtaining the rotation direction and the rotation angle of the first steering gear (8) and the rotation direction and the rotation angle of the second steering gear (9), and further comprising: Subtract the fourth value from the first value to obtain a third difference; Subtract the third value from the second value to obtain a fourth difference; Determine whether the third difference and the fourth difference are positive or negative, and obtain a second determination result; If the second judgment result is positive, the second steering engine (9) rotates in a direction in which the first light sensor (10) is away from the sun and the fourth light sensor (13) is close to the sun; if the second judgment result is negative, the second steering engine (9) rotates in a direction in which the first light sensor (10) is close to the sun and the fourth light sensor (13) is away from the sun, thereby obtaining the rotation direction of the second steering engine (9); The absolute value of the third difference is added to the absolute value of the fourth difference, divided by the average value, and then multiplied by the rotation coefficient of the second steering gear (9) and the maximum rotation angle of the second steering gear (9), to obtain the rotation angle of the second steering gear (9).

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