A transformer oil level gauge calibration method and related device

Abstract

The present application discloses a transformer oil level gauge calibration method and related devices, the method comprising: obtaining the initial oil level height of the oil storage tank and the initial external hose oil level height; obtaining the boosted oil level height of the oil storage tank and the corresponding boosted external hose oil level height after inflating and boosting the oil storage tank with a pressure regulating tool; calculating the oil level pressure coefficient according to the initial oil level height, the initial external hose oil level height, the boosted oil level height and the boosted external hose oil level height; calculating the checkpoint hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the checkpoint oil level height while preventing the expander of the oil storage tank from expanding and deforming; and performing inflation and boosting or vacuum and depressurization calibration on the expander of the oil storage tank according to the checkpoint hose oil level height to obtain the calibration result. The present application can solve the technical problems of the prior art that the prior art is time-consuming, labor-intensive, and costly, resulting in relatively low universality and efficiency of calibration.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a transformer oil level gauge calibration method and related devices. Background Art

[0002] Transformer oil plays an insulating and cooling role in the operation of oil-immersed transformers. If the transformer oil level is too high, it may cause excessive pressure in the oil tank at high temperature or heavy load, causing oil overflow or pressure relief valve action; if the transformer oil level is too low, the high-voltage part may lose the protection of oil and be exposed, causing breakdown, discharge, and transformer damage; at the same time, the oil level can also reflect the sealing condition of the oil tank, making it easy to detect oil seepage or leakage in time. Therefore, timely and accurate monitoring of the oil level is very important for the safe operation of the transformer.

[0003] In the prior art, the oil level gauge can be dismantled and sent to the laboratory for inspection before installation or during operation. However, the laboratory inspection can only inspect the accuracy of components such as pressure sensors and A / D converters, and cannot inspect and simulate the actual on-site information such as the installation height of the oil level gauge in the transformer and the transformer oil density, which has method defects. In addition, it takes a long time and a lot of work to dismantle the oil level gauge in operation and send it to the laboratory for inspection. In addition, the actual amount of transformer oil in the oil storage cabinet can be adjusted to directly detect whether the oil level gauge indication is correct. However, this method requires draining all the transformer oil in the oil storage cabinet, and preparing a large amount of qualified transformer oil in order to fill the oil storage cabinet. If it is not the same batch of oil, a mixed oil test is required. After the verification, the excess transformer oil must be transported away. This verification method has a very large workload and high cost. Summary of the invention

[0004] The present application provides a transformer oil level gauge calibration method and related devices, which are used to solve the technical problems of the prior art that the calibration is time-consuming, labor-intensive, and costly, resulting in low universality and efficiency.

[0005] In view of this, the first aspect of the present application provides a transformer oil level gauge calibration method, comprising:

[0006] Obtain the initial oil level height of the oil storage tank and the initial oil level height of the external hose;

[0007] After the oil conservator is inflated and pressurized by a pressure regulating tool, the pressurized oil level height of the oil conservator and the corresponding oil level height of the pressurized external hose are obtained;

[0008] Calculating the oil level pressure coefficient according to the initial oil level, the initial external hose oil level, the boost oil level and the boost external hose oil level;

[0009] Under the condition of preventing the expander of the oil storage tank from expanding and deforming, calculating the check point hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height;

[0010] The expander of the oil storage tank is calibrated by inflating and increasing the pressure or by exhausting and reducing the pressure according to the oil level height of the hose at the calibration point to obtain a calibration result.

[0011] Optionally, the step of obtaining the initial oil level height of the oil storage tank and the initial oil level height of the external hose may also include:

[0012] The oil level display of the oil level gauge of the oil conservator is calibrated. If the calibrated oil level is passed, the step of obtaining the initial oil level height of the oil conservator and the initial oil level height of the external hose is entered.

[0013] Optionally, the oil level pressure coefficient is calculated by using the initial oil level height, the initial external hose oil level height, the boost oil level height and the boost external hose oil level height, including:

[0014] Subtract the boosted oil level from the initial oil level to obtain a first oil level difference;

[0015] Subtract the oil level height of the boost external hose from the initial oil level height of the external hose to obtain a second oil level difference;

[0016] Based on the preset oil level pressure calculation formula, the oil level pressure coefficient is calculated according to the first oil level difference and the second oil level difference. The preset oil level pressure calculation formula is:

[0017]

[0018] Where ΔH p , ΔH y They are the first oil level difference and the second oil level difference respectively.

[0019] Optionally, the step of calculating the checkpoint hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the checkpoint oil level height while preventing the expander of the oil storage tank from expanding and deforming comprises:

[0020] In the case of preventing the expander of the oil storage tank from expanding and deforming, based on the preset oil level calculation formula, the check point hose oil level height is calculated according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height, and the preset oil level calculation formula is:

[0021] H 管n =H 管1 +(H 柜n -H柜1 )×(1+K)

[0022] Among them, H 管n , H 柜n are the oil level height of the hose at the check point and the oil level height at the check point, respectively, 柜1 , H 管1 are the initial oil level height and the initial external hose oil level height respectively, and K is the oil level pressure coefficient.

[0023] A second aspect of the present application provides a transformer oil level gauge calibration device, comprising:

[0024] A first acquisition module is used to acquire an initial oil level height of the oil storage tank and an initial oil level height of the external hose;

[0025] A second acquisition module is used to acquire the boosted oil level height of the oil conservator and the corresponding boosted external hose oil level height after the oil conservator is inflated and pressurized by a pressure regulating tool;

[0026] A coefficient calculation module, used for calculating the oil level pressure coefficient according to the initial oil level height, the initial external hose oil level height, the boost oil level height and the boost external hose oil level height;

[0027] A verification calculation module, used for calculating the checkpoint hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the checkpoint oil level height, while preventing the expander of the oil storage tank from expanding and deforming;

[0028] The verification operation module is used to perform an inflation and pressure increase or an exhaust and pressure reduction verification on the expander of the oil storage cabinet according to the oil level height of the hose at the verification point to obtain a verification result.

[0029] Optionally, also include:

[0030] The display verification module is used to verify the oil level display of the oil level gauge of the oil storage tank, and if the verification passes, the first acquisition module is triggered.

[0031] Optionally, the coefficient calculation module is specifically used to:

[0032] Subtract the boosted oil level from the initial oil level to obtain a first oil level difference;

[0033] Subtract the oil level height of the boost external hose from the initial oil level height of the external hose to obtain a second oil level difference;

[0034] Based on the preset oil level pressure calculation formula, the oil level pressure coefficient is calculated according to the first oil level difference and the second oil level difference. The preset oil level pressure calculation formula is:

[0035]

[0036] Where ΔH p , ΔH y They are the first oil level difference and the second oil level difference respectively.

[0037] Optionally, the verification calculation module is specifically used to:

[0038] In the case of preventing the expander of the oil storage tank from expanding and deforming, based on the preset oil level calculation formula, the check point hose oil level height is calculated according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height, and the preset oil level calculation formula is:

[0039] H 管n =H 管1 +(H 柜n -H 柜1 )×(1+K)

[0040] Among them, H 管n , H 柜n are the oil level height of the hose at the check point and the oil level height at the check point, respectively, 柜1 , H 管1 are the initial oil level height and the initial external hose oil level height respectively, and K is the oil level pressure coefficient.

[0041] A third aspect of the present application provides a transformer oil level gauge calibration device, the device comprising a processor and a memory;

[0042] The memory is used to store program code and transmit the program code to the processor;

[0043] The processor is used to execute the transformer oil level gauge calibration method described in the first aspect according to the instructions in the program code.

[0044] A fourth aspect of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store program codes, and the program codes are used to execute the transformer oil level gauge calibration method described in the first aspect.

[0045] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0046] In the present application, a transformer oil level gauge calibration method is provided, comprising: obtaining an initial oil level height of an oil conservator and an initial external hose oil level height; obtaining the boosted oil level height of the oil conservator and the corresponding boosted external hose oil level height after inflating and pressurizing the oil conservator through a pressure regulating tool; calculating an oil level pressure coefficient according to the initial oil level height, the initial external hose oil level height, the boosted oil level height and the boosted external hose oil level height; calculating a checkpoint hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the checkpoint hose oil level height while preventing the expander of the oil conservator from expanding and deforming; and calibrating the expander of the oil conservator by inflating and pressurizing or exhausting and depressurizing according to the checkpoint hose oil level height to obtain a calibration result.

[0047] The transformer oil level gauge calibration method provided by the present application alleviates the problems caused by equipment detection by means of parameter calculation; the calculation method is simple, and the information obtained is relatively direct, which can improve the efficiency of calibration; and accurate calculation can ensure the reliability of calibration, and the expansion of the expander is also considered during the step-up and step-down calibration process, making the final calibration result more accurate; the whole process does not require more transformer oil, reducing the calibration cost. Therefore, the present application can solve the technical problems of the prior art that the time-consuming, heavy workload, high cost, and low universality and efficiency of calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of a flow chart of a transformer oil level gauge calibration method provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of the structure of a transformer oil level gauge calibration device provided in an embodiment of the present application;

[0050] Figure 3 A schematic diagram of the structure of an oil level gauge inspection device for a vertical corrugated oil storage tank provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the structure of a pressure regulating tool provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of the external hose connection provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] For easier understanding, see Figure 1 , an embodiment of a transformer oil level gauge calibration method provided by the present application includes:

[0055] Step 101: Obtain the initial oil level height of the oil storage tank and the initial oil level height of the external hose.

[0056] Understandably, see Figure 3 The method in this embodiment involves some necessary components, such as a transformer, an oil storage cabinet, a pressure regulating tool, an external hose and an oil level detection module, etc. Other components can also be added to assist the implementation of the scheme according to the actual transformer situation and test needs, such as a radiator, a butterfly valve, a pressure relief valve, an oil drain valve, etc. The specific components can be added according to the actual situation and will not be elaborated here.

[0057] The pressure regulating tool requires vacuum / air pump, holding valve, pipe joints, connecting pipes and other components. For details, please refer to Figure 4 The vacuum / air pump has the functions of exhaust and inflation, and can complete the exhaust or inflation of the oil conservator; the valve is used to close the valve when the oil level detection unit shows that the oil level has reached the required oil level, so as to keep the air pressure in the oil conservator stable; the pipe joint is used to connect with the oil conservator breather or exhaust valve; the connecting pipe is used to connect various components. The pressure regulating tool plays an important role in the oil level gauge calibration process, and can provide different pressure conditions to detect the oil level height under different pressure conditions.

[0058] The external hose is transparent and connected to the oil storage cabinet through a pipe joint. It is used to observe the changes in the oil level and detect the oil level that is balanced with the atmospheric pressure. Figure 5 .

[0059] The oil level gauge mainly targeted in this embodiment refers to the vertical corrugated oil storage tank oil level gauge. In order to make the calibration result more accurate and reliable, it is necessary to correct the additional oil pressure generated by the superposition of the elastic deformation and elastic force generated by the heavy upper cover of the vertical corrugated oil storage tank expander and the expansion tank deformation.

[0060] It can be understood that the pressure regulating tool is connected to the oil storage tank breather or exhaust valve of the transformer, the external hose is transparent, and the oil is connected to the transformer through the oil tank drain valve. The initial oil level height and the initial external hose oil level height can be recorded as H 柜1 , H 管1 ; and the two height differences are the result of the combined effect of the weight of the expander top cover and the elastic deformation of the corrugated expander.

[0061] Furthermore, step 101, before that, also includes:

[0062] The oil level display of the oil level gauge of the oil conservator is calibrated. If the calibrated oil level is passed, the step of obtaining the initial oil level height of the oil conservator and the initial oil level height of the external hose is entered.

[0063] The oil level display verification is to check whether the display of the oil level gauge is accurate according to the current oil level of the oil conservator. If it is accurate, the verification passes. After passing the verification, the initial oil level height of the oil conservator and the initial external hose oil level height can be obtained. Otherwise, calibration is required before reading the oil level. The details are not elaborated here.

[0064] Step 102: After the oil conservator is inflated and pressurized by a pressure regulating tool, the pressurized oil level height of the oil conservator and the corresponding oil level height of the pressurized external hose are obtained.

[0065] The pressure regulating tool inflates the oil conservator until the oil level indicator of the oil conservator is full. The oil level height of the oil conservator and the oil level height of the external hose at this time are obtained, that is, the oil level height. The two oil levels at this time are respectively recorded as H 柜2 , H 管2 In addition to inflating the oil storage tank, the pressure regulating tool can also pump air out of the oil storage tank to reduce the pressure, obtain the oil level height at the time of pressure reduction for oil level gauge analysis, and adjust and calibrate according to subsequent needs.

[0066] Step 103, calculating the oil level pressure coefficient according to the initial oil level height, the initial external hose oil level height, the boost oil level height and the boost external hose oil level height.

[0067] Furthermore, step 103 includes:

[0068] Subtract the boosted oil level height from the initial oil level height to obtain a first oil level difference;

[0069] Subtract the oil level height of the boost external hose from the initial oil level height of the external hose to obtain a second oil level difference;

[0070] Based on the preset oil level pressure calculation formula, the oil level pressure coefficient is calculated according to the first oil level difference and the second oil level difference. The preset oil level pressure calculation formula is:

[0071]

[0072] Where ΔH p , ΔH y They are the first oil level difference and the second oil level difference respectively.

[0073] The calculation of the first oil level difference is ΔH p =H 管2 -H 管1 , the second oil level difference is calculated as ΔH y =H 柜2 -H 柜1The specific oil level pressure coefficient can be calculated based on the calculated oil level difference.

[0074] Step 104 , while preventing the expander of the oil storage tank from expanding and deforming, calculate the check point hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height.

[0075] Furthermore, step 104 includes:

[0076] In the case of preventing the expansion device of the oil storage tank from expanding and deforming, based on the preset oil level calculation formula, the check point hose oil level height is calculated according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height. The preset oil level calculation formula is:

[0077] H 管n =H 管1 +(H 柜n -H 柜1 )×(1+K)

[0078] Among them, H 管n , H 柜n are the oil level height of the checkpoint hose and the oil level height of the checkpoint, H 柜1 , H 管1 are the initial oil level height and the initial external hose oil level height respectively, and K is the oil level pressure coefficient.

[0079] The specific method of preventing the expansion device of the oil storage tank from expanding and deforming is to use a clamp to clamp the expansion device of the oil storage tank. In this case, the oil level height H of the hose at different check points is calculated. 管n .

[0080] Step 105: Perform an inflation or decompression calibration on the expander of the oil storage tank according to the oil level height of the hose at the calibration point to obtain a calibration result.

[0081] By using the pressure regulating tool to inflate or exhaust the oil storage cabinet, the actual oil level height of the external hose can be adjusted to the calculated height, i.e. H 管n , thus completing the verification. The number of specific verification points is not limited and can be configured according to actual needs. Each verification point can be calculated, adjusted and verified by this method.

[0082] The transformer oil level gauge calibration method provided by the present application alleviates the problems caused by equipment detection by means of parameter calculation; the calculation method is simple, and the information obtained is relatively direct, which can improve the efficiency of calibration; and accurate calculation can ensure the reliability of calibration, and the expansion of the expander is also considered during the step-up and step-down calibration process, making the final calibration result more accurate; the whole process does not require more transformer oil, reducing the calibration cost. Therefore, the present application can solve the technical problems of the prior art that the time-consuming, heavy workload, high cost, and low universality and efficiency of calibration.

[0083] For easier understanding, see Figure 2 The present application provides an embodiment of a transformer oil level gauge calibration device, comprising:

[0084] The first acquisition module 201 is used to acquire the initial oil level height of the oil storage tank and the initial oil level height of the external hose;

[0085] The second acquisition module 202 is used to obtain the boosted oil level height of the oil conservator and the corresponding boosted external hose oil level height after the oil conservator is inflated and pressurized by the pressure regulating tool;

[0086] A coefficient calculation module 203, for calculating an oil level pressure coefficient according to an initial oil level, an initial external hose oil level, a boost oil level and a boost external hose oil level;

[0087] A verification calculation module 204 is used to calculate the check point hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height while preventing the expander of the oil storage tank from expanding and deforming;

[0088] The verification operation module 205 is used to perform an inflation and pressure increase or an exhaust and pressure reduction verification on the expander of the oil storage tank according to the oil level height of the hose at the verification point to obtain a verification result.

[0089] Furthermore, it also includes:

[0090] The display verification module 206 is used to verify the oil level display of the oil level gauge of the oil storage tank. If the verification passes, the first acquisition module is triggered.

[0091] Furthermore, the coefficient calculation module 203 is specifically used for:

[0092] Subtract the boosted oil level height from the initial oil level height to obtain a first oil level difference;

[0093] Subtract the oil level height of the boost external hose from the initial oil level height of the external hose to obtain a second oil level difference;

[0094] Based on the preset oil level pressure calculation formula, the oil level pressure coefficient is calculated according to the first oil level difference and the second oil level difference. The preset oil level pressure calculation formula is:

[0095]

[0096] Where ΔH p , ΔH y They are the first oil level difference and the second oil level difference respectively.

[0097] Furthermore, the verification calculation module 204 is specifically used for:

[0098] In the case of preventing the expansion device of the oil storage tank from expanding and deforming, based on the preset oil level calculation formula, the check point hose oil level height is calculated according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height. The preset oil level calculation formula is:

[0099] H 管n =H 管1 +(H 柜n -H 柜1 )×(1+K)

[0100] Among them, H 管n , H 柜n are the oil level height of the checkpoint hose and the oil level height of the checkpoint, H 柜1 , H 管1 are the initial oil level height and the initial external hose oil level height respectively, and K is the oil level pressure coefficient.

[0101] The present application also provides a transformer oil level gauge calibration device, the device comprising a processor and a memory;

[0102] The memory is used to store the program code and transmit the program code to the processor;

[0103] The processor is used to execute the transformer oil level gauge calibration method in the above method embodiment according to the instructions in the program code.

[0104] The present application also provides a computer-readable storage medium, which is used to store program codes, and the program codes are used to execute the transformer oil level gauge calibration method in the above method embodiment.

[0105] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0106] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0107] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0108] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for executing all or part of the steps of the method described in each embodiment of the present application through a computer device (which can be a personal computer, a server, or a network device, etc.). The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: Read-Only Memory, English abbreviation: ROM), random access memory (full name in English: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program codes.

[0109] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A transformer oil level gauge calibration method, characterized in that: include: Obtain the initial oil level height of the oil storage tank and the initial oil level height of the external hose; After the oil conservator is inflated and pressurized by a pressure regulating tool, the pressurized oil level height of the oil conservator and the corresponding oil level height of the pressurized external hose are obtained; The oil level pressure coefficient is calculated according to the initial oil level height, the initial external hose oil level height, the boost oil level height and the boost external hose oil level height, and the specific process is: Subtract the boosted oil level from the initial oil level to obtain a first oil level difference; Subtract the oil level height of the boost external hose from the initial oil level height of the external hose to obtain a second oil level difference; Based on the preset oil level pressure calculation formula, the oil level pressure coefficient is calculated according to the first oil level difference and the second oil level difference. The preset oil level pressure calculation formula is: Where ΔH p , ΔH y are the first oil level difference and the second oil level difference respectively; In the case of preventing the expander of the oil storage tank from expanding and deforming, the check point hose oil level height is calculated according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height, and the specific process is: In the case of preventing the expander of the oil storage tank from expanding and deforming, based on the preset oil level calculation formula, the check point hose oil level height is calculated according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height, and the preset oil level calculation formula is: H 管n =H 管1 +(H 柜n -H 柜1 )×(1+K) Among them, H 管n , H 柜n are the oil level height of the hose at the check point and the oil level height at the check point, respectively, 柜1 , H 管1 are the initial oil level height and the initial external hose oil level height respectively, and K is the oil level pressure coefficient; The expander of the oil storage tank is calibrated by inflating and increasing the pressure or by exhausting and reducing the pressure according to the oil level height of the hose at the calibration point to obtain a calibration result.

2. The transformer oil level gauge calibration method according to claim 1, characterized in that: The obtaining of the initial oil level height of the oil storage tank and the initial oil level height of the external hose also includes: The oil level display of the oil level gauge of the oil conservator is calibrated. If the calibrated oil level is passed, the step of obtaining the initial oil level height of the oil conservator and the initial oil level height of the external hose is entered.

3. A transformer oil level gauge calibration device, characterized in that: include: A first acquisition module is used to acquire an initial oil level height of the oil storage tank and an initial oil level height of the external hose; A second acquisition module is used to acquire the boosted oil level height of the oil conservator and the corresponding boosted external hose oil level height after the oil conservator is inflated and pressurized by a pressure regulating tool; A coefficient calculation module is used to calculate the oil level pressure coefficient according to the initial oil level height, the initial external hose oil level height, the boost oil level height and the boost external hose oil level height. The coefficient calculation module is specifically used to: Subtract the boosted oil level from the initial oil level to obtain a first oil level difference; Subtract the oil level height of the boost external hose from the initial oil level height of the external hose to obtain a second oil level difference; Based on the preset oil level pressure calculation formula, the oil level pressure coefficient is calculated according to the first oil level difference and the second oil level difference. The preset oil level pressure calculation formula is: Where ΔH p , ΔH y are the first oil level difference and the second oil level difference respectively; A verification calculation module is used to calculate the check point hose oil level height according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height while preventing the expander of the oil storage tank from expanding and deforming. The verification calculation module is specifically used to: In the case of preventing the expander of the oil storage tank from expanding and deforming, based on the preset oil level calculation formula, the check point hose oil level height is calculated according to the initial oil level height, the initial external hose oil level height, the oil level pressure coefficient and the check point oil level height, and the preset oil level calculation formula is: H 管n =H 管1 +(H 柜n -H 柜1 )×(1+K) Among them, H 管n , H 柜n are the oil level height of the hose at the check point and the oil level height at the check point, respectively, 柜1 , H 管1 are the initial oil level height and the initial external hose oil level height respectively, and K is the oil level pressure coefficient; The verification operation module is used to perform an inflation and pressure increase or an exhaust and pressure reduction verification on the expander of the oil storage cabinet according to the oil level height of the hose at the verification point to obtain a verification result.

4. The transformer oil level gauge calibration device according to claim 3, characterized in that: Also includes: The display verification module is used to verify the oil level display of the oil level gauge of the oil storage tank, and if the verification passes, the first acquisition module is triggered.

5. A transformer oil level gauge calibration device, characterized in that: The device comprises a processor and a memory; The memory is used to store program codes and transmit the program codes to the processor; The processor is used to execute the transformer oil level gauge calibration method according to any one of claims 1-2 according to the instructions in the program code.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store program codes, and the program codes are used to execute the transformer oil level gauge calibration method according to any one of claims 1-2.

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