A dynamic auxiliary heat dissipation device for oil-immersed transformer and a control method thereof

Abstract

The application provides a dynamic auxiliary heat dissipation device and control method for an oil-immersed transformer, and relates to the technical field of heat dissipation, comprising a heat dissipation fin clamp plate, a first steering engine, a first support, a second support, a radiation refrigeration plate, a solar photovoltaic panel and a heat-conducting silica gel sheet. The heat dissipation fin clamp plate is a hollow structure, comprising a clamp plate provided with bolt holes on both sides and a hollow part connected with the heat dissipation fin; the first steering engine is installed on the upper surface of the heat dissipation fin clamp plate, and the 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 installed on the top of the second support and is connected with the heat dissipation fin clamp plate through the heat-conducting silica gel sheet; and the solar photovoltaic panel is connected with the end of the radiation refrigeration plate away from the heat dissipation fin through a third support. The application uses the heat exchange between the radiation refrigeration plate and the space as a heat dissipation means, uses the solar photovoltaic panel to provide electric energy for the device, and realizes the real-time adjustment of the angle of the radiation refrigeration plate and the solar photovoltaic panel, thereby improving the heat dissipation efficiency and the power generation efficiency.

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 for an oil-immersed transformer and a control method thereof. Background Art

[0002] Excessively high hotspot temperatures can severely impact the lifespan of transformers. Current standards indicate that when the hotspot temperature of an oil-immersed transformer reaches 98°C, the relative aging rate of the transformer insulation doubles for every 6°C increase in hotspot temperature. In recent years, transformer heat dissipation has become increasingly problematic. This is due, on the one hand, to the significant increase in electricity consumption in my country and the rapid growth of grid load; on the other hand, to the accelerating and intensifying global warming, which is driving temperatures ever higher. For existing transformers, when the temperature exceeds the limit, maintenance teams typically employ auxiliary cooling methods such as water flushing, ice blocks, and fans. However, these methods are inefficient, time-consuming, and labor-intensive, while fan-assisted cooling consumes a lot of energy and is noisy. Furthermore, auxiliary cooling devices based on phase change materials are prone to contraction and expansion caused by liquid-to-gas conversion, leading to liquid leakage and posing safety risks. 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. To achieve the above objectives, the technical solutions adopted by the present invention are 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 servo, a first bracket, a second bracket, a radiant cooling plate, a solar photovoltaic panel, and a thermally conductive silicone sheet. The heat sink clamp is a hollow structure, comprising two side clamps and a hollow portion, wherein the two side clamps are provided with bolt holes, and the hollow portion is connected to the heat sink; the first servo 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 servo; the bottom of the second bracket is connected to the top of the first bracket via the second servo; the radiant cooling plate is mounted on the top of the second bracket; the solar photovoltaic panel is connected in parallel to the end of the radiant cooling plate away from the heat sink via a 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 radiant 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] Remove the light shielding of the device and fix the device to the heat sink of the oil-immersed transformer by using bolts to fit the bolt holes on both sides of the heat sink clamping plate;

[0008] Respectively obtaining 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] 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 and the rotation direction and the rotation angle of the second steering gear;

[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] This invention uses a radiant cooling panel and space heat exchange as an auxiliary cooling method for oil-immersed transformers. A solar photovoltaic panel provides power to a microprocessor, multiple sensors, and multiple steering gears, eliminating the need for an external power source. By integrating the sensors, microprocessor, steering gears, and support brackets, the radiant cooling panel and solar photovoltaic panel can be adjusted in real time to face the sun, improving both the cooling efficiency of the radiant cooling panel 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 in part will become apparent from the description, or be understood by practicing the embodiments of the present invention. The purposes 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 is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

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

[0017] Figure 2 This is a schematic diagram of the rear side of a dynamic auxiliary heat dissipation device for an 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 housing; 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, not 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 of 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. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of the present invention, the terms "first" and "second" are used only to distinguish the description and should not be understood as indicating or implying relative importance.

[0024] Example 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 thermal 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 the shape of "冂", that is, the top surface of the heat sink clamping plate 1 connects 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 with the bolt holes on the clamping plates on both sides through bolts 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 module 16 is closely fitted with 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 radiative 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 radiative 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 radiative 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 radiative 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 radiative 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 radiative 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 radiative 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 radiant cooling plate 7 close to the heat sink 16.

[0033] It is understandable 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 housing 14 with a microprocessor inside, which is mounted on the heat sink clamp 1. The microprocessor is electrically connected to 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 respectively.

[0035] The microprocessor is a 51 series single-chip microcomputer of STC89C52RC. The light intensity data collected by the four light sensors is used to obtain the distance of the four light sensors relative to the sun. The microprocessor controls the rotation of the first servo 8 and the second servo 9 to change the angle of the radiant cooling panel 7 and the solar photovoltaic panel 6 in real time, as well as the positions of the four light sensors located on the surface of the radiant cooling panel 7 and the solar photovoltaic panel 6. By making the distance of the four light sensors relative to the sun the same, the radiant cooling panel 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 radiant cooling plate 7 comprises an aluminum plate and a radiant cooling material, the radiant cooling material being evenly coated on the surface of the aluminum plate. The radiant cooling plate 7 utilizes thermal radiation to radiate 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. 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] Where 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] As can be seen from the above formula, the radiation heat transfer power depends on the temperature difference between the surface of the radiation cooling plate 7 and the surface of the radiation heat transfer 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 transfer power.

[0043] Therefore, in this application, space is selected as the object for radiative heat exchange. The temperature of outer space is 3K, which is much lower than the temperature of objects on the Earth's surface. Given that the atmospheric transmittance is high in the 8-13um range, and solar radiation is primarily concentrated in the 0-2.5um band, the surface emissivity of the radiative cooling plate 7 is regulated by the radiative cooling material, resulting in a high emissivity within the 8-13um band and a high reflectivity within the solar radiation band. This allows for radiative heat exchange with space while also protecting the device from the effects of solar radiation.

[0044] The thickness of the hollow part is 30 mm. It can be installed on heat sinks 16 of different thicknesses through bolts and cooperation 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. No additional power supply is required, making the device safe and reliable, and ensuring the safe operation of the oil-immersed transformer 15.

[0046] Example 2:

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

[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 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 prevent 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 from affecting the device.

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

[0051] S300 , 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 .

[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 do not need to work.

[0054] S400: If the first value, the second value, the third value, and the fourth value are not all zero, calculating based on the first value, the second value, the third value, and the fourth value to obtain 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;

[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 the 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: Determine whether the first difference and the second difference are positive or negative, and obtain a first determination result;

[0060] S405. If the first judgment result is positive, the first steering gear 8 rotates in a direction such that the first light sensor 10 moves away from the sun and the second light sensor 11 moves toward the sun. If the first judgment result is negative, the first steering gear 8 rotates in a direction such that the first light sensor 10 moves toward the sun and the second light sensor 11 moves away from the sun, thereby obtaining the rotation direction of the first steering gear 8.

[0061] S406. Add the absolute value of the first difference to the absolute value of the second difference, divide the result by the average value, and then multiply 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 rotation angle of the first steering gear 8 is expressed as:

[0062]

[0063] Wherein, θ1 represents the rotation angle of the first servo 8; k1 represents the rotation coefficient of the first servo 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: Determine whether the third difference and the fourth difference are positive or negative, and obtain a second determination result;

[0067] S410. If the second judgment result is positive, the second steering gear 9 rotates in a direction such that the first light sensor 10 moves away from the sun and the fourth light sensor 13 moves toward the sun. If the second judgment result is negative, the second steering gear 9 rotates in a direction such that the first light sensor 10 moves toward the sun and the fourth light sensor 13 moves away from the sun. The rotation direction of the second steering gear 9 is obtained.

[0068] S411. Add the absolute value of the third difference to the absolute value of the fourth difference, divide the result by the average value, and then multiply 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 rotation angle of the second steering gear 9 is expressed as:

[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 rotate the first servo 8 and the second servo 9, changing the angles of the radiant cooling panel 7 and the solar photovoltaic panel 6 in real time so that the radiant cooling panel 7 and the solar photovoltaic panel 6 are always facing the solar radiation, thereby maximizing the heat dissipation efficiency of the radiant 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.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

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

Claims

1. A control method for a dynamic auxiliary heat dissipation device of an oil-immersed transformer, characterized in that: The device comprises: a heat sink clamping plate (1), the heat sink clamping plate (1) being a hollow structure, comprising clamping plates on both sides and a hollow portion, the heat sink clamping plates (1) 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 which is 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 radiant cooling plate (7), the radiant cooling plate (7) being mounted on 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 radiant cooling plate (7) away from the heat sink (16) via a third bracket (5); A heat-conducting silicone sheet (2), one end of the heat-conducting silicone sheet (2) being connected to the heat sink clamping plate (1) and the other end being connected to the radiation cooling plate (7); 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); the third light sensor (12) and the fourth light sensor (13) are respectively mounted on two corners of the radiant cooling plate (7) close to the heat sink (16); 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; The control method comprises the following steps: 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 based on 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); controlling the second steering gear (9) to rotate according to the rotation direction and rotation angle of the second steering gear (9); The calculation based on 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) includes: calculating an average of the first value, the second value, the third value, and the fourth value; Subtracting 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) moves away from the sun and the second light sensor (11) moves closer 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) moves closer to the sun and the second light sensor (11) moves 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).

2. The control method of the dynamic auxiliary heat dissipation device of the oil-immersed transformer according to claim 1 is characterized in that: The method further comprises: calculating 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) based on the first value, the second value, the third value and the fourth value, and obtaining the rotation direction and the rotation angle of the first steering gear (8) and the second steering gear (9). Subtracting the fourth value from the first value to obtain a third difference; subtracting 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) moves away from the sun and the fourth light sensor (13) moves closer 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) moves closer to the sun and the fourth light sensor (13) moves 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).

3. The control method of the dynamic auxiliary heat dissipation device of an oil-immersed transformer according to claim 1, characterized in that: The device further comprises a protective housing (14) having a microprocessor therein, the protective housing (14) being mounted on the heat sink clamping plate (1), and the microprocessor being 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 control method of the dynamic auxiliary heat dissipation device of an 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 control method of the dynamic auxiliary heat dissipation device of an 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 control method of the dynamic auxiliary heat dissipation device of an oil-immersed transformer according to claim 3, characterized in that: The microprocessor is a 51 series single chip microcomputer of STC89C52RC.

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

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