Transformer simulation device and transformer simulation method

Abstract

The invention relates to electrical equipment testing, and discloses a transformer simulation device which comprises a metal tank, a plurality of coils and a current generator, insulating liquid is placed in the metal tank, the coils are connected in series to form two power supply ends, the coils are stacked in the metal tank, a gap exists between every two adjacent coils, and the current generator is electrically connected with the metal tank. The highest positions of the coils are lower than the liquid level of the insulating liquid, the current generator comprises two output ends, and the two output ends are connected with the two power supply ends respectively so as to conduct the coils. According to the transformer, the gaps are formed between the stacked coils, the coils can be permeated by the insulating liquid, meanwhile, the current generator can conduct the coils, the simulation environment of the heating coils is closer to the real working environment, and the change of the permeation capacity and the insulating capacity of the heated insulating liquid is closer to that of a real transformer.

Description

Technical Field

[0001] The invention relates to electrical equipment testing, in particular to a transformer simulation device and a transformer simulation method. Background Art

[0002] Old assets such as transformers in the power grid have poor heat resistance levels. When renovating old transformers, ester insulating fluids can be used to refill them to improve their heat resistance levels.

[0003] To verify the changes in the refilled transformer, the migration process of mineral oil in its oil-paper insulation needs to be studied. In order to ensure the continuous and safe power supply of the power grid, regular sampling and testing on real transformers is generally not allowed. In addition, to confirm the impregnation state of the transformer's solid insulation, the transformer winding needs to be disassembled, which means that the transformer will either be sent back to the factory for repair or retired, which is very costly.

[0004] Therefore, in view of the above problems, a simulation device is needed to meet the verification requirements for the refilling transformer. Summary of the invention

[0005] The object of the present invention is to provide a simulation device for verifying the thermal resistance level of a refill transformer.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a transformer simulation device and a transformer simulation method.

[0007] In a first aspect of the present application, a transformer simulation device is provided, which includes: a metal tank containing insulating liquid; a plurality of coils, which are connected in series to form two power supply ends, and the plurality of coils are stacked in the metal tank, with a gap between two adjacent coils, and the highest points of the plurality of coils are lower than the liquid level of the insulating liquid; and a current generator, which includes two output ends, and the two output ends are respectively connected to the two power supply ends to conduct the plurality of coils.

[0008] In one embodiment, a first hole located at the top and a second hole located at the bottom are formed on the side wall of the metal tank, and the height of the first hole is lower than the liquid level of the insulating liquid; the highest points of the plurality of coils are lower than the first hole, and the lowest points of the plurality of coils are higher than the second hole; the transformer simulation device also includes: a radiator, which is installed on the outside of the metal tank, and a pipeline and a driver are provided inside the radiator, with openings at both ends of the pipeline, and the first hole and the second hole are connected at both ends of the pipeline respectively, so that the pipeline is connected to the inside of the metal tank, and the driver is used to drive the insulating liquid to flow in the pipeline.

[0009] In another embodiment, the transformer simulation device also includes: two oil baffles, the two oil baffles are respectively attached above and below the plurality of coils, the inner diameters of the two oil baffles are smaller than the outer diameter of the coils, the outer diameters of the two oil baffles are larger than the outer diameter of the coils, and the two oil baffles are in contact with the inner wall of the metal can; an oil baffle plate, the oil baffle plate is installed in the gap between two of the coils, the diameter of the oil baffle plate is smaller than the outer diameter of the coils, and the diameter of the oil baffle plate is larger than the inner diameter of the coils.

[0010] In another embodiment, the transformer simulation device further comprises: a tubular heat insulation plate, wherein the tubular heat insulation plate is placed between the inner side of the metal tank and the plurality of coils.

[0011] In yet another embodiment, the transformer simulation device further includes: a heater placed between the tubular insulation board and the inner side of the metal tank; and a controller for supplying power to the heater.

[0012] In one embodiment, the transformer simulation device also includes a plurality of temperature sensors; the plurality of temperature sensors are installed on a plurality of coils to obtain the winding temperature of the plurality of coils; the plurality of temperature sensors are also installed between the tubular insulation board and the inner side of the metal tank to obtain the liquid temperature of the insulating liquid.

[0013] In yet another embodiment, the controller further comprises a screen and buttons, wherein the screen is used to display the winding temperature or the liquid temperature, and the buttons are used to adjust the target temperature of the winding temperature or the target temperature of the liquid temperature.

[0014] In another embodiment, a temperature sensor is installed on each coil, and the winding temperature includes several coil temperatures; temperature sensors are installed at the location of the first hole and the location of the second hole, and the liquid temperature includes the top liquid temperature and the bottom liquid temperature.

[0015] In another embodiment, a notch is provided on one of the coils, and the coil with the notch is used to simulate a winding hot spot, and the coil temperature corresponding to the coil with the notch is the winding hot spot temperature.

[0016] The second aspect of the present application provides a transformer simulation method, which is applied to the transformer simulation device provided in the first aspect of the present application. The transformer simulation method includes: winding a copper wire soaked in insulating liquid into a plurality of coils; connecting the plurality of coils in series and stacking them in a metal can; starting a liquid driver to drive the insulating liquid to flow in the plurality of coils; and energizing the plurality of coils connected in series.

[0017] Compared with the prior art, the transformer simulation device according to the embodiment of the present invention has the following beneficial effects:

[0018] In the transformer simulation device of the embodiment of the present invention, the energized stacked coils can generate heat, and the heated coils have a heating effect on the insulating liquid. The use of a complete coil makes the insulating liquid in the transformer simulation device heated unevenly, and the heating condition of the insulating liquid is closer to that of a real transformer, so that the data obtained is more accurate, thereby realizing the structure of the transformer filled with insulating liquid, which helps to improve the accuracy of verifying the heat resistance level of the refilled transformer without disassembling the real transformer, and can meet the invention purpose of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a transformer simulation device exemplarily shown in an embodiment of the present invention.

[0020] Figure 2 It is a schematic structural diagram of a transformer simulation device with a heat sink according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of a flow path of a transformer simulation device exemplarily shown in an embodiment of the present invention.

[0022] Figure 4 It is a schematic structural diagram of a transformer simulation device with a tubular heat insulation board exemplarily shown in an embodiment of the present invention.

[0023] Figure 5 It is a schematic structural diagram of a transformer simulation device with a controller exemplarily shown in an embodiment of the present invention.

[0024] Figure 6 It is a flowchart of a transformer simulation method exemplarily shown in an embodiment of the present invention.

[0025] Reference numerals:

[0026] 1. Transformer simulation device, 10. Metal can, 101. First hole, 102. Second hole, 103. Insulating liquid, 11. Coil, 111. Power supply end, 112. Notch, 12. Radiator, 121. Pipeline, 122. Driver, 13. Oil baffle ring, 14. Oil baffle plate, 15. Current generator, 151. Output end, 16. Tubular insulation board, 17. Heater, 18. Controller, 181. Screen, 182. Button, 19. Temperature sensor. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] The development of electronic products has led to an increase in electricity consumption. If the old transformer equipment is completely replaced, it will cost a lot of money and effort. Therefore, a method to reuse the old transformer equipment is needed. In actual transformation projects, in order to balance the cost and use effect, sometimes the transformer will be refilled with insulating liquid with higher insulation capacity and thermal grade to improve the transformer's carrying capacity to meet greater power demand.

[0029] However, life and production require continuous power supply, and power outages are usually not allowed. Even if power outages are required, the cost of the transformer does not allow it to be dismantled for inspection. Otherwise, it will need to be returned to the factory for repair (repair cost and time cost) or replaced (high cost).

[0030] Based on this, Figure 1 As shown, a transformer simulation device 1 of a preferred embodiment of an embodiment of the present invention, the transformer simulation device 1, includes: a metal tank 10, a plurality of coils 11 and a current generator 15, the metal tank 10 contains insulating liquid 103, the plurality of coils 11 are connected in series to form two power supply terminals 111, and the plurality of coils 11 are stacked in the metal tank 10, there is a gap between two adjacent coils 11, the highest points of the plurality of coils 11 are lower than the liquid level of the insulating liquid 103, and the current generator 15 includes two output terminals 151, and the two output terminals 151 are respectively connected to the two power supply terminals 111 to conduct the plurality of coils 11.

[0031] Through the above scheme, there are gaps between the stacked coils 11, which can allow the coils 11 to be penetrated by the insulating liquid 103. At the same time, the current generator 15 can turn on the coils 11. Therefore, the simulated environment of the heated coils 11 is closer to the real working environment, and the changes in the penetration ability and insulation ability of the insulating liquid 103 after heating are closer to the real transformer.

[0032] Compared with testing the insulation capacity of the insulating liquid 103 alone, in the above scheme of the present application, the thermal grade analysis of the coil 11 permeated with the insulating liquid 103 is performed, which is closer to the real transformer and helps to obtain more accurate experimental data to verify the thermal grade of the real refilled transformer.

[0033] It is understandable that the shape of the metal can 10 can be cylindrical, rectangular or other shapes that can accommodate the stacked coils 11. The coils 11 can be annular or square, and the specific shape of the coils 11 can be determined according to the structure of the transformer to be analyzed, so that the structure of the transformer simulation device 1 is closer to the structure of a real transformer.

[0034] The inventors further discovered that real transformers often have a certain heat dissipation capacity, so it is necessary to further improve the simulation device so that it can be closer to the real transformer in long-term operation. Figure 1 As shown, the side wall of the metal tank 10 is provided with a first hole 101 located at the top and a second hole 102 located at the bottom, the height of the first hole 101 is lower than the liquid level of the insulating liquid 103; the highest points of the plurality of coils 11 are lower than the first hole 101, and the lowest points of the plurality of coils 11 are higher than the second hole 102; the transformer simulation device 1 also includes: a radiator 12, the radiator 12 is installed on the outside of the metal tank 10, a pipeline 121 and a driver 122 are arranged inside the radiator 12, both ends of the pipeline 121 are open, the two ends of the pipeline 121 are connected to the first hole 101 and the second hole 102 respectively, so that the pipeline 121 is connected to the inside of the metal tank 10, and the driver 122 is used to drive the insulating liquid 103 to flow in the pipeline 121.

[0035] Through the above scheme, since the first hole 101 and the second hole 102 are both below the liquid level of the insulating liquid 103, the pipeline 121 of the radiator 12 is connected to the inside of the metal tank 10, and since the lowest point of several coils 11 is higher than the second hole 102, all coils 11 can contact the insulating liquid 103 cooled by the radiator 12, so that the hot and cold distribution is more uniform.

[0036] In another embodiment, Figure 3 As shown, the transformer simulation device 1 may further include: two oil baffle rings 13 and an oil baffle sheet 14, the two oil baffle rings 13 are respectively attached above and below the plurality of coils 11, the inner diameters of the two oil baffle rings 13 are both smaller than the outer diameters of the coils 11, the outer diameters of the two oil baffle rings 13 are both larger than the outer diameters of the coils 11, and the two oil baffle rings 13 are both in contact with the inner wall of the metal can 10. The oil baffle sheet 14 is installed in the gap between two of the coils 11, the diameter of the oil baffle sheet 14 is smaller than the outer diameter of the coils 11, and the diameter of the oil baffle sheet 14 is larger than the inner diameter of the coils 11.

[0037] It is understandable that the difference between the oil deflector ring 13 and the oil deflector sheet 14 is that the oil deflector ring 13 has a through hole in the middle, that is, the insulating liquid 103 can pass through the middle of the oil deflector ring 13, while the oil deflector sheet 14 can prevent the liquid from flowing through the middle.

[0038] In the present application, the heater may be any type such as a heating rod, a heating wire, etc., and the temperature sensor may be any type such as a thermocouple, a thermistor, etc.

[0039] Therefore, through the above scheme, illustratively, the flow path of the insulating liquid 103 is formed as follows: Figure 3As shown by the arrows in : the insulating liquid 103 enters the metal can 10 through the second hole 102. Since the outer edge of the oil baffle ring 13 at the bottom is in contact with the metal can 10, the insulating liquid 103 is forced to flow upward from the middle of the oil baffle ring 13. Therefore, the insulating liquid 103 passes through the middle of the coil 11 below and flows to the surroundings from the gaps between the coils 11. When the insulating liquid 103 approaches the oil baffle plate 14, the middle of the oil baffle plate 14 cannot pass the liquid, so the insulating liquid 103 is forced to flow to the surroundings. The insulating liquid 103 continues to flow upward from the surroundings. When passing through the coil 11 without the oil baffle plate 14 installed, it flows from the surroundings to the middle of the coil 11 again through the gaps between the coils 11. When the insulating liquid 103 passes the top, another oil baffle ring 13 of the same size allows the insulating liquid 103 to flow out from the middle of the top coil 11, and then flows out of the metal can 10 through the first hole 101.

[0040] The flow direction of the insulating liquid 103 in the coil 11 is cleverly changed by two oil baffle rings 13 and one oil baffle plate 14, so that several coils 11 in the transformer simulation device 1 can contact the insulating liquid 103 with various flow directions, so as to simulate the actual penetration condition of the actual transformer as much as possible, so that the experimental data using the transformer simulation device 1 of the present application is more accurate.

[0041] In another embodiment, if Figure 4 As shown, the transformer simulation device 1 may further include: a tubular heat insulation board 16 , which is placed between the inner side of the metal tank 10 and the plurality of coils 11 .

[0042] The tubular heat insulation board 16 is used to reduce the heat transferred from the coil 11 to the surrounding insulating liquid 103, so that the heat emitted by the coil 11 can be quickly concentrated to achieve the purpose of simulating the copper-oil temperature difference inside the transformer. Rapid temperature rise can be achieved under the condition of a smaller current generator 15.

[0043] In another embodiment, Figure 5 As shown, the transformer simulation device 1 may further include: a heater 17 placed between the tubular heat insulation board 16 and the inner side of the metal tank 10 ; and a controller 18 for supplying power to the heater 17 .

[0044] In a conventional transformer simulation device, the temperature may rise relatively slowly, and it is not possible to quickly reach the high temperature state inside the transformer when operating under high load. However, by adding a heater 17 and supplying power through a controller 18, the temperature inside the device can be quickly raised. This ability to quickly heat up can well simulate the actual working environment of a transformer under high load conditions, where the temperature rises rapidly due to increased current and increased losses.

[0045] High-load operation is a common working condition for transformers and requires focused research. The faster heating speed enables the simulation device to more accurately reproduce the temperature change process of the transformer under high-load conditions. This helps researchers to have a deeper understanding of the operating characteristics of the transformer under high temperature and high load conditions, such as thermal stability and changes in electrical performance, thereby providing more reliable experimental data and theoretical support for transformer design optimization, overload protection, etc.

[0046] Traditional simulation devices may only consider the heat generated inside the transformer itself, but in actual operation, the transformer will also be affected by the heat of the external environment, such as high temperature weather in summer and heat dissipation of surrounding equipment. The heater 17 independent of the coil 11 can well simulate the influence of this external heat. Researchers can accurately control the power and heating time of the heater 17 through the controller 18 to simulate different degrees of external heat input, so as to study the influence of external heat on the working performance of the transformer. For example, in extremely hot weather, external heat may increase the temperature inside the transformer, affecting the insulation performance and service life. The device can simulate this situation and provide a research basis for improving the reliability of transformers in complex environments.

[0047] At the same time, different experiments may need to simulate different working conditions and conditions. The combination of heater 17 and controller 18 enables the simulation device to meet more diverse experimental requirements. Researchers can flexibly adjust the heating method and parameters according to the specific experimental purpose to simulate various complex thermal environments, such as gradual temperature rise, intermittent high temperature, etc. This will help to carry out more comprehensive and in-depth experimental research, explore the various performance change laws of transformers under different thermal conditions, and provide richer experimental data for the research and development and improvement of transformers.

[0048] In one embodiment, if Figure 5 The transformer simulation device 1 shown may also include a plurality of temperature sensors 19 ; the plurality of temperature sensors 19 are installed on the plurality of coils 11 for obtaining the winding temperatures of the plurality of coils 11 ; the plurality of temperature sensors 19 are also installed between the tubular insulation board 16 and the inner side of the metal tank 10 for obtaining the liquid temperature of the insulating liquid 103 .

[0049] Through the above solution, the temperature of the coil 11 and the temperature of the insulating liquid 103 can be obtained through multiple temperature sensors 19, which is helpful to analyze the temperature conduction between the insulating liquid 103 and the coil 11, so as to analyze the thermal conductivity of the insulating liquid 103.

[0050] In another embodiment, Figure 5 As shown, the controller 18 may further include a screen 181 and a button 182 , wherein the screen 181 is used to display the winding temperature or the liquid temperature, and the button 182 is used to adjust the target temperature of the winding temperature or the target temperature of the liquid temperature.

[0051] By adding a screen 181 and a button 182 to the controller 18, the controller 18 has the function of adjusting the temperature. Combined with the temperature sensor 19 and the heater 17, the target temperature can be freely set to quickly adjust the temperature of the coil 11 or the insulating liquid 103 to meet the experimental requirements. Compared with the actual transformer, the heating time can be reduced and the time required for the experiment can be reduced.

[0052] In another embodiment, Figure 5 As shown, a temperature sensor 19 is installed on each coil 11, and the winding temperature includes the temperatures of several coils 11; temperature sensors 19 are installed at the positions of the first hole 101 and the second hole 102, and the liquid temperature includes the top liquid temperature and the bottom liquid temperature.

[0053] Through the above solution, the top liquid temperature and the bottom liquid temperature can be obtained at the same time, which is helpful to analyze the influence of the radiator 12 on the temperature of the insulating liquid 103 during the operation of the transformer. Since a temperature sensor 19 is installed on each coil 11, the temperature rise of the coil 11 at each liquid level can also be analyzed, so as to analyze the influence of the installation position of the coil 11 on the thermal level.

[0054] In another embodiment of the present application, Figure 5 As shown, a notch 112 may be provided on one of the coils 11 , and the coil 11 with the notch 112 is used to simulate a winding hotspot, and the temperature of the coil 11 corresponding to the coil 11 with the notch 112 is the winding hotspot temperature.

[0055] The hot spot is the point with the highest temperature, and the hot spot temperature of the winding is the highest temperature among all the coils 11. The resistance of the coil 11 with the notch 112 increases, so the temperature rise is much higher than that of other coils 11, so as to simulate the temperature rise when the transformer is damaged, so as to analyze the thermal capacity level of the coil 11 and the insulating liquid 103 under extreme conditions.

[0056] In actual operation, transformers rarely reach extreme conditions and are difficult to predict. Directly testing extreme conditions on actual transformers is not only risky, but may take a long time to reach extreme conditions. However, this solution can quickly obtain coils that break through the limits during the experiment by simulating hot spots. This ability to quickly simulate extreme conditions greatly improves experimental efficiency, allowing researchers to obtain transformer performance data under extreme conditions in a shorter period of time, providing more timely and effective solutions for dealing with extreme conditions.

[0057] Correspondingly, the second aspect of the present application further provides a transformer simulation method, which is applied to the transformer simulation device 1 provided in the first aspect of the present application, such as Figure 6As shown, the transformer simulation method may include:

[0058] S101, winding the copper wire soaked in insulating liquid 103 into a plurality of coils 11;

[0059] S102, connecting a plurality of coils 11 in series and stacking them in a metal can 10;

[0060] S103, energize the plurality of coils 11 connected in series.

[0061] The transformer simulation method of the present application includes all the technical features of the transformer simulation device 1 of the present application, so the embodiments and beneficial effects of the transformer simulation device 1 can be used for the transformer simulation method of the present application.

[0062] In one embodiment, the transformer simulation method may further include: starting the liquid driver 122 to drive the insulating liquid 103 to flow in the plurality of coils 11;

[0063] In one embodiment, the transformer simulation method further includes:

[0064] Adjust the target temperature of the winding temperature or the target temperature of the liquid temperature by means of button 182;

[0065] The current temperature of the winding or the current temperature of the liquid is acquired by the temperature sensor 19 .

[0066] In another embodiment, the winding temperature includes the temperatures of the plurality of coils 11, the liquid temperature includes the top liquid temperature and the bottom liquid temperature, and the transformer simulation method further includes:

[0067] Acquire the temperatures of the coils 11 through the temperature sensor 19;

[0068] The hot spot temperature of the winding and the average winding temperature are calculated based on the temperatures of the plurality of coils 11 . The hot spot temperature of the winding is the maximum value of the temperatures of the plurality of coils 11 , and the average winding temperature is the average value of the temperatures of the plurality of coils 11 .

[0069] Compared with the prior art, the transformer simulation device 1 according to the embodiment of the present invention has the following beneficial effects:

[0070] In the transformer simulation device 1 of the embodiment of the present invention, the energized and stacked coils 11 can generate heat, and the heated coils 11 have a heating effect on the insulating liquid 103. The use of a complete coil 11 makes the insulating liquid 103 in the transformer simulation device 1 heated unevenly, and the heating condition of the insulating liquid 103 is closer to that of a real transformer, so that the data obtained is more accurate, thereby realizing the structure of the transformer filled with the insulating liquid 103, which helps to improve the accuracy of verifying the heat resistance level of the refilled transformer without disassembling the real transformer.

[0071] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A transformer simulation device, characterized in that: include: A metal can (10), wherein an insulating liquid (103) is placed in the metal can (10); A plurality of coils (11), wherein the plurality of coils (11) are connected in series to form two power supply ends (111), the plurality of coils (11) are stacked in the metal tank (10), a gap exists between two adjacent coils (11), and the highest points of the plurality of coils (11) are lower than the liquid level of the insulating liquid (103); and a current generator (15), wherein the current generator (15) comprises two output ends (151), wherein the two output ends (151) are respectively connected to the two power supply ends (111) to conduct the plurality of coils (11).

2. The transformer simulation device according to claim 1, characterized in that: The side wall of the metal tank (10) is provided with a first hole (101) located at the top and a second hole (102) located at the bottom, the height of the first hole (101) being lower than the liquid level of the insulating liquid (103); the highest points of a plurality of the coils (11) are lower than the first hole (101), and the lowest points of a plurality of the coils (11) are higher than the second hole (102); the transformer simulation device further comprises: A radiator (12), the radiator (12) being mounted on the outside of the metal tank (10), a pipeline (121) and a driver (122) being arranged inside the radiator (12), the pipeline (121) being open at both ends, the two ends of the pipeline (121) being connected to the first hole (101) and the second hole (102) respectively, so that the pipeline (121) is connected to the inside of the metal tank (10), and the driver (122) is used for driving the insulating liquid (103) to flow in the pipeline (121).

3. The transformer simulation device according to claim 2, characterized in that: The transformer simulation device also includes: Two oil deflector rings (13), the two oil deflector rings (13) are respectively arranged above and below the plurality of coils (11), the inner diameters of the two oil deflector rings (13) are smaller than the outer diameters of the coils (11), the outer diameters of the two oil deflector rings (13) are larger than the outer diameters of the coils (11), and the two oil deflector rings (13) are in contact with the inner wall of the metal can (10); An oil baffle (14) is installed in a gap between two of the coils (11); the diameter of the oil baffle (14) is smaller than the outer diameter of the coil (11), and the diameter of the oil baffle (14) is larger than the inner diameter of the coil (11).

4. The transformer simulation device according to claim 3, characterized in that: The transformer simulation device also includes: A tubular heat insulation board (16) is placed between the inner side of the metal tank (10) and the plurality of coils (11).

5. The transformer simulation device according to claim 4, characterized in that: The transformer simulation device also includes: a heater (17), the heater (17) being placed between the tubular insulation board (16) and the inner side of the metal tank (10); and a controller (18), wherein the controller (18) is used to supply power to the heater (17).

6. The transformer simulation device according to claim 5, characterized in that: The transformer simulation device further comprises a plurality of temperature sensors (19); the plurality of temperature sensors (19) are mounted on the plurality of coils (11) for obtaining the winding temperatures of the plurality of coils (11); the plurality of temperature sensors (19) are also mounted between the tubular heat insulation board (16) and the inner side of the metal tank (10) for obtaining the liquid temperature of the insulating liquid (103).

7. The transformer simulation device according to claim 6, characterized in that: The controller (18) further comprises a screen (181) and a button (182), wherein the screen (181) is used to display the winding temperature or the liquid temperature, and the button (182) is used to adjust the target temperature of the winding temperature or the target temperature of the liquid temperature.

8. The transformer simulation device according to claim 7, characterized in that: The temperature sensor (19) is installed on each of the coils (11), and the winding temperature includes the temperatures of several coils (11); the temperature sensor (19) is installed at the location of the first hole (101) and the location of the second hole (102), and the liquid temperature includes the top layer liquid temperature and the bottom layer liquid temperature.

9. The transformer simulation device according to claim 8, characterized in that: A notch (112) is provided on one of the coils (11), and the coil (11) with the notch (112) is used to simulate a winding hot spot, and the temperature of the coil (11) corresponding to the coil (11) with the notch (112) is the winding hot spot temperature.

10. A transformer simulation method, characterized in that: The transformer simulation method is applied to the transformer simulation device according to any one of claims 1 to 9, and the transformer simulation method comprises: Coiling the copper wire soaked in insulating liquid (103) into a plurality of coils (11); Connecting a plurality of the coils (11) in series and stacking them in a metal can (10); The plurality of coils (11) connected in series are energized.

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