An information traceability method and system for insulating oil and insulating paper used in power transformers

Abstract

The present invention discloses a method and a system for tracing the information of insulating oil and insulating paper used in a power transformer. The method includes: building a full-scale three-dimensional electromagnetic-thermal multi-physical field finite element simulation model of the transformer for the insulating oil and insulating paper to be traced, importing the historical operation data of the transformer with the insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physical field finite element simulation model of the transformer and performing calibration, and inversely calculating the operation conditions of the insulating oil and insulating paper to be traced; respectively carrying out performance parameter tests on the insulating oil and insulating paper to be traced, and decoupling and optimizing the test data to obtain the data to be traced; comparing the data to be traced with the information database, and respectively carrying out tracing on the insulating oil and insulating paper to be traced according to the comparison results. The problem that it is impossible to trace the oil-paper state after the power transformer has experienced different operating states is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transformer monitoring, and particularly relates to a method and system for tracing the information of insulating oil and insulating paper used in a power transformer. Background Art

[0002] As the insulating oil and paper serve as the insulation, cooling, and support media for transformers, they are crucial for the safe and stable operation of transformers. After a transformer is put into operation, it can operate normally in the short term. However, as the operation time increases, the insulating oil deteriorates rapidly, which is likely to induce internal faults in the transformer. Therefore, it is necessary to carry out on-grid inspection and evaluation of transformer insulating oil, identify the source and quality of the insulating oil, and establishing a traceability detection system has become a research hotspot, which helps to control the oil quality from the source.

[0003] The Chinese invention patent "A Method and System for Tracing the Manufacturer Based on the Surface Pattern of Insulating Cardboard" with the application number 202311390702.0 identifies the insulating cardboard to be recognized by collecting the surface pattern images of insulating cardboard samples from each manufacturer and using the recognition models of each manufacturer to determine the corresponding manufacturer of the insulating cardboard to be recognized. The Chinese invention patent "A Method, Medium, Electronic Device and Device for Tracing and Detecting Insulating Oil" with the application number 202111317470.7 traces the insulating oil to be detected by obtaining the target physical and chemical parameters of the insulating oil to be detected and comparing the target physical and chemical parameters with the standard physical and chemical parameters of the insulating oil to be detected.

[0004] The prior art mainly traces the origin based on the physical and chemical properties of newly used transformer insulating oil and insulating paper. However, during the operation of power transformers, the properties of insulating oil and paper will change with the vibration and heat generation of the transformer during operation, and different insulating oil and paper will also show different characteristics under different combinations. The prior art does not effectively utilize and analyze the influence of the power transformer state on the insulating oil and paper, and cannot trace the state of the oil and paper after the power transformer has experienced different operating states. Summary of the Invention

[0005] The present invention provides a method and system for tracing the information of insulating oil and insulating paper used in a power transformer to solve the technical problem that it is impossible to trace the state of the oil and paper after the power transformer has experienced different operating states.

[0006] In a first aspect, the present invention provides a method for tracing the information of insulating oil and insulating paper used in a power transformer, including:

[0007] Constructing an information database for transformer insulating oil and transformer insulating paper, where the information database contains multi-source state data of transformer insulating oil performance data, transformer insulating paper performance data, and transformer operation data;

[0008] Build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of a transformer with insulating oil and insulating paper to be traced. Import the historical operation data of the transformer with insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced;

[0009] Conduct performance parameter tests on the insulating oil and insulating paper to be traced respectively, and decouple and optimize the test data to obtain the data to be traced;

[0010] Compare the data to be traced with the information database, and conduct tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results.

[0011] In a second aspect, the present invention provides an information tracing system for insulating oil and insulating paper used in a power transformer, including:

[0012] A construction module configured to construct an information database of insulating oil and insulating paper of a transformer, and the information database contains multi-source state data of insulating oil performance data, insulating paper performance data and transformer operation data of the transformer;

[0013] A calibration module configured to build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of a transformer with insulating oil and insulating paper to be traced. Import the historical operation data of the transformer with insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced;

[0014] A test module configured to conduct performance parameter tests on the insulating oil and insulating paper to be traced respectively, and decouple and optimize the test data to obtain the data to be traced;

[0015] A comparison module configured to compare the data to be traced with the information database, and conduct tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results.

[0016] In a third aspect, there is provided an electronic device, which includes: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the steps of the method for tracing information of insulating oil and insulating paper used in a power transformer according to any embodiment of the present invention.

[0017] Fourthly, the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the program instructions are executed by a processor, the processor is caused to execute the steps of the method for tracing the information of insulating oil and insulating paper for a power transformer according to any embodiment of the present invention.

[0018] The method and system for tracing the information of insulating oil and insulating paper for a power transformer in this application solve the problems that in the prior art, the related performance analysis of insulating oil and paper is not comprehensive enough, the relevance of different characteristic changes is not considered, and accurate tracing cannot be carried out for the insulating oil and paper whose internal insulation has changed after long-term operation. Through this method and system, the transformer operation and maintenance personnel can trace the state of the oil and paper after different operation states, and carry out differential operation and maintenance and repair of the transformer according to the tracing results. The method and system for tracing the information of insulating oil and insulating paper for a power transformer are of great significance for improving the internal insulation detection of the transformer and the quality control of the transformer manufacturer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a flowchart of a method for tracing the information of insulating oil and insulating paper for a power transformer provided by an embodiment of the present invention;

[0021] Figure 2 It is a structural block diagram of a system for tracing the information of insulating oil and insulating paper for a power transformer provided by an embodiment of the present invention;

[0022] Figure 3 It is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0024] Please refer to Figure 1 , which shows a flowchart of a method for tracing the information of insulating oil and insulating paper for a power transformer in this application.

[0025] AsFigure 1 As shown in Figure 1 , the information tracing method for insulating oil and insulating paper used in power transformers specifically includes the following steps:

[0026] Step S101, construct an information database for transformer insulating oil and transformer insulating paper, where the information database contains multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data, and transformer operation data.

[0027] In this step, the basic data sources of transformer insulating oil and transformer insulating paper mainly come from the factory inspection reports of insulating oil and insulating paper suppliers, the test reports of transformer factories on insulating oil and insulating paper, and the inspection reports of third-party institutions before the transformer is put into operation. The multi-source status data of transformer operation data includes the historical operation load curve of the transformer, the top oil temperature, on-line oil chromatogram data, and ambient temperature data. The historical operation load curve data comes from the power system production dispatching operation system, and the top oil temperature, on-line oil chromatogram data, and ambient temperature data come from the power system auxiliary control system.

[0028] Step S102, build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer for the insulating oil and insulating paper to be traced, import the historical operation data of the transformer for the insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced.

[0029] In this step, the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer includes the transformer and the boundary air package.

[0030] Take the historical load current data of the transformer as the excitation source of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer, and the ambient temperature and oil surface temperature data as the boundary conditions of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer to obtain the simulated data of the top oil surface temperature. The constraint conditions of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer are:

[0031] ,

[0032] where, is the measured value of the top oil surface temperature, is the simulated calculated value of the top oil temperature, is the measured value of the ambient temperature, is the simulated calculated value of the ambient temperature.

[0033] Calibrate the heat dissipation coefficients of the insulating oil to be traced and the insulating paper to be traced in the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer according to the simulated difference between the top oil temperature and the ambient temperature until the boundary conditions are met.

[0034] It should be noted that the operation conditions of the insulating oil and insulating paper to be traced back by inversion calculation include:

[0035] Based on the corrected full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and the operation area of the insulating paper to be traced back in the transformer, the historical operating temperature dataset of the insulating paper to be traced back is calculated, and the top oil temperature is used as the historical operating condition of the insulating oil to be traced back;

[0036] Based on the thermal aging characteristics, calculate the equivalent operating duration of the insulating oil and insulating paper to be traced back under the rated load. The expression is:

[0037] ,

[0038] In the formula, is the equivalent operating duration of the insulating oil to be traced back under the rated load, is the aging time of the insulating oil to be traced back, is the equivalent aging rate of the insulating oil to be traced back, is the temperature of the insulating oil to be traced back at time t;

[0039]

[0040] In the formula, is the equivalent operating duration of the insulating paper to be traced back under the rated load, is the aging time of the insulating paper to be traced back, is the equivalent aging rate of the insulating paper to be traced back, is the temperature of the insulating paper to be traced back at time t.

[0041] Step S103: Conduct performance parameter tests on the insulating oil and insulating paper to be traced back respectively, and decouple and optimize the test data to obtain the data to be traced back.

[0042] In this step, the performance parameters of the insulating oil include the chemical composition, physical properties and equivalent operating duration of the insulating oil. The chemical composition of the insulating oil includes the percentage of six chemical components such as hydrocarbons, aliphatic carboxylic acids, aromatic compounds, sulfides, organic acids and organic acid salts, and phenols. The physical properties include five key parameter technical indicators such as dielectric strength, flash point, density, turbidity, and acid value. The performance parameters of the insulating paper mainly include the degree of polymerization test, tensile strength test, volume resistivity test, and power frequency dielectric constant test after equivalent thermal aging.

[0043] According to the performance data of the insulating oil and insulating paper to be traced back, construct the information dataset of the insulating oil to be traced back and the information dataset of the insulating paper to be traced back :

[0044] ,

[0045] ,

[0046] In the formula, is the i-th element in the data set , and is the i-th element in the data set ;

[0047] Spatial regularization is performed on the information to be traced, and outlier data in the information to be traced is removed based on the PauTa criterion. The data set sample is , the average value of the data set of the information to be traced, and the standard error S of the data set of the information to be traced:

[0048] ,

[0049] In the formula, n is the sample size of the data set. When there exists a sequence j such that there is in the data set of the information to be traced, is an outlier, which is removed and data cleaning is performed again based on the PauTa criterion.

[0050] Step S104: Compare the data to be traced with the information database, and conduct tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results.

[0051] In this step, a neural network algorithm is used to construct an insulating oil and paper distance weight model. This model takes the cleaned initial data to be traced as the input and the scale of the data to be traced as the output to realize the information tracing of insulating oil and paper. The neural network algorithm adopts a multi-layer perceptron structure, including an input layer, a hidden layer, and an output layer, and the model is trained through the backpropagation algorithm to minimize the prediction error.

[0052] Obtain the performance data under different combinations of insulating oil and insulating paper from the transformer insulating oil and paper information database, and use the transient simulation method to determine the cross-linking relationship number, standard regression coefficient, and partial autocorrelation number of insulating oil and insulating paper, perform equivalent parameter processing on the characteristic data of insulating oil and paper, and introduce the influencing factor of insulating oil and paper.

[0053] Among them, in the construction process of the insulating oil and paper distance weight model, calculate the scale coefficient: the cleaned initial data to be traced is mapped to the preset tracing field coordinate system according to the tracing classification interval sequence, and multiple linear normalization equations are constructed; among them, calculate the scale coefficient of the data to be traced in the preset coordinate system to each data in the information database , and the expression is:

[0054] ,

[0055] In the formula, is the decoupling coefficient of insulating oil and paper, is the dimension of the dataset to be traced, is the ordinal number of the data to be traced, is the weighting coefficient of the influencing factor, is the scale of the k-th parameter of the data to be traced, is the scale of each existing data source in the tracing field, is the scale of the (k-1)-th parameter of the data to be traced.

[0056] Suppose are the three smallest scale coefficients from the data to be traced to the data elements in the database, and is the minimum tracing distance coefficient. When is satisfied, it is determined that the data to be traced is consistent with the corresponding data element in the database; otherwise, the largest scale in the data to be traced is removed, and the scale coefficients of each data element in the information database are recalculated and tracing is carried out again.

[0057] Obtained through neural network algorithm training, it can reflect the complex relationship between multi-source state quantity perception data and the equivalent conversion coefficient of DC bias. The weight coefficient and the influencing factor of insulating oil and paper are optimized through the model training process to minimize the prediction error.

[0058] Please refer to Figure 2 , which shows the structural block diagram of an information tracing system for insulating oil and insulating paper used in a power transformer according to the present application.

[0059] As Figure 2 shown, the insulating oil and insulating paper information tracing system 200 includes a construction module 210, a calibration module 220, a testing module 230, and a comparison module 240.

[0060] Among them, the construction module 210 is configured to construct an information database for transformer insulating oil and transformer insulating paper, and the information database contains multi-source state data of transformer insulating oil performance data, transformer insulating paper performance data, and transformer operation data;

[0061] The calibration module 220 is configured to build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer for the insulating oil and insulating paper to be traced, import the historical operation data of the transformer for the insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced;

[0062] ​​The test module 230 is configured to perform performance parameter tests on the insulating oil and insulating paper to be traced respectively, decouple and optimize the test data, and obtain the data to be traced;

[0063] The comparison module 240 is configured to compare the data to be traced with the information database, and perform tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results.

[0064] It should be understood that Figure 2 The various modules described in Figure 1 correspond to the respective steps in the method described in the reference Figure 2 Therefore, the operations, features, and corresponding technical effects described above for the method also apply to

[0065] In other embodiments, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored. When the program instructions are executed by a processor, the processor executes the information tracing method for insulating oil and insulating paper used in a power transformer in any of the above method embodiments;

[0066] As an implementation manner, the computer-readable storage medium of the present invention stores computer-executable instructions, and the computer-executable instructions are set as:

[0067] Construct an information database for transformer insulating oil and transformer insulating paper, and the information database includes multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data, and transformer operation data;

[0068] Build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of a transformer for the insulating oil and insulating paper to be traced, import the historical operation data of the transformer for the insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced;

[0069] Perform performance parameter tests on the insulating oil and insulating paper to be traced respectively, and decouple and optimize the test data to obtain the data to be traced;

[0070] Compare the data to be traced with the information database, and perform tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results.

[0071] A computer-readable storage medium may include a program storage area and a data storage area. Among them, the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the traceability system for insulating oil and insulating paper used in power transformers, etc. In addition, the computer-readable storage medium may include high-speed random access memory, and may also include memories, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some embodiments, the computer-readable storage medium may optionally include a memory remotely provided with respect to the processor, and these remote memories may be connected to the traceability system for insulating oil and insulating paper used in power transformers through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0072] Figure 3 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, as Figure 3 shown, the device includes: a processor 310 and a memory 320. The electronic device may further include: an input device 330 and an output device 340. The processor 310, the memory 320, the input device 330, and the output device 340 may be connected through a bus or other means, Figure 3 taking the connection through the bus as an example. The memory 320 is the above-mentioned computer-readable storage medium. The processor 310 executes various functional applications and data processing of the server by running non-volatile software programs, instructions, and modules stored in the memory 320, that is, implementing the traceability method for insulating oil and insulating paper used in power transformers in the above method embodiment. The input device 330 may receive input digital or character information, and generate key signal inputs related to user settings and function controls of the traceability system for insulating oil and insulating paper used in power transformers. The output device 340 may include display devices such as a display screen.

[0073] The above electronic device may execute the method provided by the embodiment of the present invention, and has corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.

[0074] As an implementation manner, the above electronic device is applied to the traceability system for insulating oil and insulating paper used in power transformers, and is used for a client, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to:

[0075] Construct an information database for transformer insulating oil and transformer insulating paper, where the information database contains multi-source status data such as transformer insulating oil performance data, transformer insulating paper performance data, and transformer operation data;

[0076] Build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model for the transformer of the insulating oil and insulating paper to be traced. Import the historical operation data of the transformer of the insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced;

[0077] Conduct performance parameter tests on the insulating oil and insulating paper to be traced respectively, and decouple and optimize the test data to obtain the data to be traced;

[0078] Compare the data to be traced with the information database, and conduct tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results.

[0079] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solutions, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0080] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. An information traceability method for insulating oil and insulating paper used in a power transformer, characterized in that, Including: Construct an information database of transformer insulating oil and transformer insulating paper, where the information database contains multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data, and transformer operation data; Build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer for the insulating oil and insulating paper to be traced. Import the historical operation data of the transformer with the insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced. Among them, the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer includes the transformer and the boundary air package; The importing the historical operation data of the transformer with the insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and performing calibration includes: Taking the historical load current data of the transformer as the excitation source of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer, and the ambient temperature and oil surface temperature data as the boundary conditions of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer, to obtain the simulated data of the top-layer oil surface temperature. The constraint conditions of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer are: ， In the formula, is the measured value of the top oil surface temperature, is the simulated calculated value of the top oil temperature, is the measured value of the ambient temperature, is the simulated calculated value of the ambient temperature; Calibrate the heat dissipation coefficients of the insulating oil to be traced and the insulating paper to be traced in the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer according to the simulated difference between the top-layer oil temperature and the ambient temperature until the boundary conditions are met; The inversely calculating the operation conditions of the insulating oil and insulating paper to be traced includes: According to the calibrated full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and the operation area of the insulating paper to be traced in the transformer, calculate the historical operation temperature dataset of the insulating paper to be traced, and use the top-layer oil temperature as the historical operation condition of the insulating oil to be traced; Based on the thermal aging characteristics, calculate the equivalent operation duration of the insulating oil and insulating paper to be traced under the rated load. The expression is: ， In the formula, is the equivalent operation duration of the insulating oil to be traced back under the rated load, is the aging time of the insulating oil to be traced back, is the equivalent aging rate of the insulating oil to be traced back, is the temperature of the insulating oil to be traced back at time t; ， Wherein, is the equivalent operation duration of the insulating paper to be traced under the rated load, is the aging time of the insulating paper to be traced, is the equivalent aging rate of the insulating paper to be traced, is the temperature of the insulating paper to be traced at time t; Respectively conduct performance parameter tests on the insulating oil and insulating paper to be traced, and perform decoupling and optimization processing on the test data to obtain the data to be traced; Compare the data to be traced with the information database, and conduct tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results.

2. The information traceability method of insulating oil and insulating paper for a power transformer according to claim 1, wherein The comparing the data to be traced with the information database and conducting tracing on the insulating oil and insulating paper to be traced respectively according to the comparison results includes: Calculate the scale factor of the data to be traced back in the preset coordinate system to each data in the information database , and the expression is: ， wherein, is the decoupling coefficient of insulating oil paper, is the dimension of the dataset to be traced, is the serial number of the data to be traced, is the weighting coefficient of the influencing factor, is the scale of the k-th parameter of the data to be traced, is the scale of each existing data source in the tracing field, is the scale of the (k - 1)-th parameter of the data to be traced.

3. An information traceability system for insulating oil and insulating paper used in a power transformer, characterized in that, Including: A construction module, configured to construct an information database of transformer insulating oil and transformer insulating paper, where the information database contains multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data, and transformer operation data; Calibration module, configured to build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of a transformer with insulating oil and insulating paper to be traced, import the historical operation data of the transformer with insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and perform calibration, and inversely calculate the operation conditions of the insulating oil and insulating paper to be traced. Among them, the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer includes the transformer and the boundary air package; The importing the historical operation data of the transformer with insulating oil and insulating paper to be traced into the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and performing calibration includes: Taking the historical load current data of the transformer as the excitation source of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer, and the ambient temperature and oil surface temperature data as the boundary conditions of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer, to obtain the simulated data of the top-layer oil surface temperature. The constraint conditions of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer are: ， Wherein, is the measured value of the top oil surface temperature, is the simulated calculated value of the top oil temperature, is the measured value of the ambient temperature, is the simulated calculated value of the ambient temperature; Calibrating the heat dissipation coefficients of the insulating oil and insulating paper to be traced in the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer according to the simulated difference between the top-layer oil temperature and the ambient temperature until the boundary conditions are satisfied; The inversely calculating the operation conditions of the insulating oil and insulating paper to be traced includes: According to the calibrated full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and the operation area of the insulating paper to be traced in the transformer, calculating the historical operation temperature data set of the insulating paper to be traced, and taking the top-layer oil temperature as the historical operation condition of the insulating oil to be traced; Based on the thermal aging characteristics, calculating the equivalent operation duration of the insulating oil and insulating paper to be traced under the rated load, and the expression is: ， In the formula, is the equivalent operation duration of the insulating oil to be traced back under the rated load, is the aging time of the insulating oil to be traced back, is the equivalent aging rate of the insulating oil to be traced back, is the temperature of the insulating oil to be traced back at time t; ， In the formula, is the equivalent operation duration of the insulating paper to be traced under the rated load, is the aging time of the insulating paper to be traced, is the equivalent aging rate of the insulating paper to be traced, is the temperature of the insulating paper to be traced at time t; Testing module, configured to respectively perform performance parameter tests on the insulating oil and insulating paper to be traced, and perform decoupling and optimization processing on the test data to obtain the data to be traced; Comparison module, configured to compare the data to be traced with the information database, and respectively perform traceability on the insulating oil and insulating paper to be traced according to the comparison results.

4. An electronic device, characterized in that, Including: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method according to any one of claims 1 to 2.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method according to any one of claims 1 to 2.

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