Insulating oil and insulating paper information tracing method and system for power transformer

Abstract

The invention discloses an insulating oil and insulating paper information tracing method and system for a power transformer, and the method comprises the steps: building a transformer full-scale three-dimensional electromagnetic-thermal multi-physical field finite element simulation model of to-be-traced insulating oil and to-be-traced insulating paper, transformer historical operation data of to-be-traced insulating oil and to-be-traced insulating paper are imported into the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model for correction, and operation conditions of the to-be-traced insulating oil and the to-be-traced insulating paper are subjected to inversion calculation; carrying out performance parameter testing on the to-be-traced insulating oil and the to-be-traced insulating paper, and carrying out decoupling and optimization processing on test data to obtain to-be-traced data; and comparing the to-be-traced data with the information database, and respectively tracing the to-be-traced insulating oil and the to-be-traced insulating paper according to a comparison result. The problem that the oil paper state of the power transformer experiencing different operation states cannot be traced is solved.

Description

Technical Field

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

[0002] As the insulation, cooling and supporting medium of transformers, insulating oil paper is crucial to the safe and stable operation of transformers. At present, the transformer insulating oil market is relatively chaotic. Some manufacturers purchase inferior insulating oil and use recycled oil. The transformer can operate normally in the short term after commissioning, but as the operating time increases, the insulating oil deteriorates rapidly, which can easily induce internal faults of the transformer. Therefore, it is necessary to carry out transformer insulating oil network inspection and evaluation, identify the source and quality of insulating oil, and establish a traceability inspection system, which has become a research hotspot and helps to control the quality of oil products from the source.

[0003] The Chinese invention patent with application number 202311390702.0, "A manufacturer traceability method and system based on the surface pattern of insulating cardboard", collects surface pattern images of insulating cardboard samples from various manufacturers, identifies the insulating cardboard to be identified based on the recognition model of each manufacturer, and determines the manufacturer corresponding to the insulating cardboard to be identified. The Chinese invention patent with application number 202111317470.7, "A traceability detection method, medium, electronic equipment and device for insulating oil", obtains the target physical and chemical parameters of the insulating oil to be tested, compares the target physical and chemical parameters with the standard physical and chemical parameters of the insulating oil to be tested, and traces the insulating oil to be tested.

[0004] The existing technology mainly traces the source based on the physical and chemical properties of the insulating oil and insulating paper of the new transformer. However, during the operation of the power transformer, the properties of the insulating oil and paper will change with the vibration and heat of the transformer, and different insulating oils and papers will also exhibit different properties in different combinations. The existing technology does not effectively utilize and analyze the impact 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 an information tracing method and system for insulating oil and insulating paper for power transformers, which are used to solve the technical problem that it is impossible to trace the oil and paper status of the power transformer after it has experienced different operating statuses.

[0006] In a first aspect, the present invention provides a method for tracing the information of insulating oil and insulating paper for a power transformer, comprising: Constructing an information database of transformer insulating oil and transformer insulating paper, wherein 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 to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced; Carry out performance parameter tests on the insulating oil to be traced and the insulating paper to be traced respectively, decouple and optimize the test data to obtain the data to be traced; The data to be traced are compared with the information database, and the insulating oil to be traced and the insulating paper to be traced are traced respectively according to the comparison results.

[0007] In a second aspect, the present invention provides an insulating oil and insulating paper information traceability system for a power transformer, comprising: A construction module is configured to construct an information database of transformer insulating oil and transformer insulating paper, wherein the information database contains multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data and transformer operation data; A correction module 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 to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced; The test module is configured to respectively carry out performance parameter tests on the insulating oil to be traced and the insulating paper to be traced, and decouple and optimize the test data to obtain the data to be traced; The comparison module is configured to compare the data to be traced with the information database, and to trace the insulating oil to be traced and the insulating paper to be traced respectively according to the comparison results.

[0008] According to a third aspect, an electronic device is provided, comprising: 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 perform the steps of the method for tracing information of insulating oil and insulating paper for power transformers of any embodiment of the present invention.

[0009] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor executes the steps of the method for tracing information of insulating oil and insulating paper for power transformers of any embodiment of the present invention.

[0010] The information traceability method and system of insulating oil and insulating paper used in power transformers of this application solves the problem that the prior art cannot comprehensively analyze the related performance of insulating oil and paper, does not consider the correlation between changes in different characteristics, and cannot accurately trace the insulating oil and paper whose internal insulation has changed after long-term operation. Through this method and system, transformer operation and maintenance personnel can trace the state of oil and paper after different operating states, and carry out differentiated operation and maintenance inspections on transformers according to the traceability results. The information traceability method and system of insulating oil and insulating paper used in power transformers is of great significance to improving the internal insulation detection of transformers and the quality control of transformer manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 A flow chart of a method for tracing the source of insulating oil and insulating paper information for a power transformer provided by one embodiment of the present invention; Figure 2 A structural block diagram of an insulating oil and insulating paper information traceability system for a power transformer provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1 , which shows a flow chart of a method for tracing information of insulating oil and insulating paper for power transformers of the present application.

[0015] like Figure 1 As shown, the method for tracing the information of insulating oil and insulating paper used in power transformers specifically includes the following steps: Step S101, constructing an information database of transformer insulating oil and transformer insulating paper, wherein the information database contains multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data and transformer operation data.

[0016] In this step, the basic data sources of transformer insulating oil and transformer insulating paper mainly come from the factory reports of insulating oil and insulating paper suppliers, the test reports of insulating oil and insulating paper of transformer factories, 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 transformer, top oil temperature, online oil chromatography data, and ambient temperature data. The historical operation load curve data comes from the production dispatching operation system of the power system, and the top oil temperature, online oil chromatography data, and ambient temperature data come from the auxiliary control system of the power system.

[0017] Step S102, build a full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer for the insulating oil to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced.

[0018] 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 bag.

[0019] The transformer historical load current data is used as the excitation source of the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model, and the ambient temperature and oil surface temperature data are used as the boundary conditions of the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model to obtain the top oil surface temperature simulation data. The constraint conditions of the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model 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 ambient temperature, Calculated value for ambient temperature simulation.

[0020] According to the simulated difference between the top oil temperature and the ambient temperature, the heat dissipation coefficient of the insulating oil to be traced and the heat dissipation coefficient of the insulating paper to be traced of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer are corrected until the boundary conditions are met.

[0021] It should be noted that the inverse calculation of the operating conditions of the insulating oil to be traced and the insulating paper to be traced includes: Based on the corrected full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and the operating area of ​​the insulating paper to be traced in the transformer, the historical operating temperature data set of the insulating paper to be traced is calculated, and the top oil temperature is used as the historical operating status of the insulating oil to be traced; Based on the thermal aging characteristics, the equivalent operating time of the insulating oil to be traced and the insulating paper to be traced under rated load is calculated as follows: , In the formula, is the equivalent operating time of the insulating oil to be traced under rated load, is the aging time of the insulating oil to be traced, is the equivalent aging rate of the insulating oil to be traced, is the temperature of the insulating oil to be traced at time t;

[0022] In the formula, is the equivalent operating time of the insulation paper to be traced under rated load, is the aging time of the insulation paper to be traced, is the equivalent aging rate of the insulation paper to be traced, is the temperature of the insulation paper to be traced at time t.

[0023] Step S103, respectively carry out performance parameter tests on the insulating oil to be traced and the insulating paper to be traced, and decouple and optimize the test data to obtain the data to be traced.

[0024] In this step, the performance parameters of insulating oil include the chemical composition, physical properties and equivalent operating time of insulating oil. The chemical composition of insulating oil includes the percentage of six major chemical components, including hydrocarbons, aliphatic carboxylic acids, aromatic compounds, sulfides, organic acids and organic acid salts, and phenols. The physical properties include five key parameter technical indicators, including dielectric strength, flash point, density, turbidity, and acid value. The performance parameters of insulating paper mainly include the degree of polymerization test after equivalent thermal aging, tensile strength test, volume resistivity test, and power frequency dielectric constant test.

[0025] According to the performance data of insulating oil and insulating paper to be traced, the information dataset of insulating oil to be traced is constructed. , Insulation paper information data set to be traced : , , In the formula, For the dataset The i-th element in For the dataset The i-th element in ; The information to be traced is spatially regularized, 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 information to be traced , the standard error S of the data set to be traced: , In the formula, n is the sample size of the data set. When there is a sequence j that makes the data set to be traced contain hour, Outliers were removed and the data was cleaned again based on the PauTa criterion.

[0026] Step S104, comparing the data to be traced with the information database, and tracing the insulating oil to be traced and the insulating paper to be traced respectively according to the comparison result.

[0027] In this step, a neural network algorithm is used to construct an insulating oil-paper distance weight model. The model takes the cleaned initial data to be traced as input and the scale of the data to be traced as output to achieve information traceability 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 trains the model through a back propagation algorithm to minimize the prediction error.

[0028] The performance data of different insulating oil and insulating paper combinations were obtained from the transformer insulating oil-paper information database. The cross-link relationship number, standard regression coefficient and partial autocorrelation number of insulating oil and insulating paper were determined by transient simulation method. The characteristic data of insulating oil and paper were processed with equivalent parameters, and the insulating oil-paper influencing factor was introduced.

[0029] In the process of constructing the insulating oil-paper distance weight model, the scale coefficient is calculated: the cleaned initial data to be traced is mapped to the preset traceability field coordinate system according to the traceability classification interval sequence, and multiple linear normalization equations are constructed; wherein the scale coefficient of the data to be traced in the preset coordinate system to each data in the information database is calculated. , the expression is: , In the formula, is the insulation oil-paper decoupling coefficient, is the dimension of the dataset to be traced. is the ordinal number of the data to be traced, is the weighted coefficient of the impact factor, is the scale of the kth parameter of the data to be traced, To trace the scale of existing data sources in the field, is the scale of the k-1th parameter of the data to be traced.

[0030] Assume that are the three smallest scale coefficients of the data to be traced to the database data element and , is the minimum tracing distance coefficient, when When the data to be traced is identified The corresponding data elements are consistent; otherwise, remove the largest scale in the data to be traced, calculate the scale coefficient of each data element in the information database again and carry out traceability.

[0031] It is obtained through neural network algorithm training and can reflect the complex relationship between multi-source state quantity perception data and DC bias magnetic equivalent conversion coefficient. The weight coefficient and insulating oil-paper influence factor are optimized through the model training process to minimize the prediction error.

[0032] See also Figure 2 , which shows a structural block diagram of an insulating oil and insulating paper information traceability system for a power transformer of the present application.

[0033] like Figure 2 As shown, the insulating oil and insulating paper information traceability system 200 includes a construction module 210 , a correction module 220 , a test module 230 and a comparison module 240 .

[0034] The construction module 210 is configured to construct an information database of transformer insulating oil and transformer insulating paper, wherein the information database contains multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data and transformer operation data; The correction 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 to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced; The test module 230 is configured to respectively perform performance parameter tests on the insulating oil to be traced and the insulating paper to be traced, and decouple and optimize the test data to obtain the data to be traced; The comparison module 240 is configured to compare the data to be traced with the information database, and to trace the insulating oil to be traced and the insulating paper to be traced respectively according to the comparison result.

[0035] It should be understood that Figure 2 Modules and references documented in Figure 1 Therefore, the operations and features described above for the method and the corresponding technical effects are also applicable to Figure 2 The modules in it will not be described in detail here.

[0036] In other embodiments, the embodiments of the present invention further provide a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor is caused to execute the method for tracing the information of insulating oil and insulating paper for power transformers in any of the above method embodiments; As an implementation mode, the computer-readable storage medium of the present invention stores computer-executable instructions, and the computer-executable instructions are configured as follows: Constructing an information database of transformer insulating oil and transformer insulating paper, wherein 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 to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced; Carry out performance parameter tests on the insulating oil to be traced and the insulating paper to be traced respectively, decouple and optimize the test data to obtain the data to be traced; The data to be traced are compared with the information database, and the insulating oil to be traced and the insulating paper to be traced are traced respectively according to the comparison results.

[0037] The computer-readable storage medium may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the insulating oil and insulating paper information traceability system for power transformers, etc. In addition, the computer-readable storage medium may include a high-speed random access memory, and may also include a memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the insulating oil and insulating paper information traceability system for power transformers via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0038] Figure 3 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention, such as Figure 3 As shown, the device includes: a processor 310 and a memory 320. The electronic device may also 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 via a bus or other means. Figure 3In the example, the connection through the bus is taken 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 the non-volatile software programs, instructions and modules stored in the memory 320, that is, the insulating oil and insulating paper information traceability method for power transformers in the above-mentioned method embodiment is realized. The input device 330 can receive input digital or character information, and generate key signal input related to user settings and function control of the insulating oil and insulating paper information traceability system for power transformers. The output device 340 may include display devices such as display screens.

[0039] The electronic device can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not described in detail in this embodiment, please refer to the method provided by the embodiment of the present invention.

[0040] As an embodiment, the electronic device is applied to an insulating oil and insulating paper information traceability system for a power transformer, and is used for a client, and includes: at least one processor; and a memory connected to the at least one processor in communication; 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: Constructing an information database of transformer insulating oil and transformer insulating paper, wherein 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 to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced; Carry out performance parameter tests on the insulating oil to be traced and the insulating paper to be traced respectively, decouple and optimize the test data to obtain the data to be traced; The data to be traced are compared with the information database, and the insulating oil to be traced and the insulating paper to be traced are traced respectively according to the comparison results.

[0041] Through the description of the above implementation modes, those skilled in the art can clearly understand that each implementation mode can be implemented by means of software plus a necessary general hardware platform, or of course by hardware. Based on such an understanding, the above technical solution can essentially or in other words be embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for 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 embodiment.

[0042] 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 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 invention.

Claims

1. A method for tracing the source of insulating oil and insulating paper information for power transformers, characterized in that: include: Constructing an information database of transformer insulating oil and transformer insulating paper, wherein 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 to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced; Carry out performance parameter tests on the insulating oil to be traced and the insulating paper to be traced respectively, decouple and optimize the test data to obtain the data to be traced; The data to be traced are compared with the information database, and the insulating oil to be traced and the insulating paper to be traced are traced respectively according to the comparison results.

2. The method for tracing the source of insulating oil and insulating paper information for a power transformer according to claim 1, characterized in that: in, The transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model includes a transformer and a boundary air bag; The step of importing the transformer historical operation data of the insulating oil to be traced and the insulating paper to be traced into the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model and performing correction includes: The transformer historical load current data is used as the excitation source of the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model, and the ambient temperature and oil surface temperature data are used as the boundary conditions of the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model to obtain the top oil surface temperature simulation data. The constraint conditions of the transformer full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model 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 ambient temperature, It is the calculated value of ambient temperature simulation; According to the simulated difference between the top oil temperature and the ambient temperature, the heat dissipation coefficient of the insulating oil to be traced and the heat dissipation coefficient of the insulating paper to be traced of the full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer are corrected until the boundary conditions are met.

3. The method for tracing the source of insulating oil and insulating paper information for a power transformer according to claim 1, characterized in that: The inverse calculation of the operation status of the insulating oil to be traced and the insulating paper to be traced includes: Based on the corrected full-scale three-dimensional electromagnetic-thermal multi-physics field finite element simulation model of the transformer and the operating area of ​​the insulating paper to be traced in the transformer, the historical operating temperature data set of the insulating paper to be traced is calculated, and the top oil temperature is used as the historical operating status of the insulating oil to be traced; Based on the thermal aging characteristics, the equivalent operating time of the insulating oil to be traced and the insulating paper to be traced under rated load is calculated as follows: ， In the formula, is the equivalent operating time of the insulating oil to be traced under rated load, is the aging time of the insulating oil to be traced, is the equivalent aging rate of the insulating oil to be traced, is the temperature of the insulating oil to be traced at time t; ， In the formula, is the equivalent operating time of the insulation paper to be traced under rated load, is the aging time of the insulation paper to be traced, is the equivalent aging rate of the insulation paper to be traced, is the temperature of the insulation paper to be traced at time t.

4. The method for tracing the source of insulating oil and insulating paper information for a power transformer according to claim 1, characterized in that: The comparing the data to be traced with the information database, and tracing the insulating oil to be traced and the insulating paper to be traced respectively according to the comparison result, comprises: Calculate the scale factor of the data to be traced in the preset coordinate system to each data in the information database , the expression is: ， In the formula, is the insulation oil-paper decoupling coefficient, is the dimension of the data set to be traced. is the ordinal number of the data to be traced, is the weighted coefficient of the impact factor, is the scale of the kth parameter of the data to be traced, To trace the scale of existing data sources in the field, is the scale of the k-1th parameter of the data to be traced.

5. An information tracing system for insulating oil and insulating paper used in power transformers, characterized in that: include: A construction module is configured to construct an information database of transformer insulating oil and transformer insulating paper, wherein the information database contains multi-source status data of transformer insulating oil performance data, transformer insulating paper performance data and transformer operation data; A correction module 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 to be traced and the insulating paper to be traced, import the historical operation data of the transformer for the insulating oil to be traced and the 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 correction, and inversely calculate the operation status of the insulating oil to be traced and the insulating paper to be traced; The test module is configured to respectively carry out performance parameter tests on the insulating oil to be traced and the insulating paper to be traced, and decouple and optimize the test data to obtain the data to be traced; The comparison module is configured to compare the data to be traced with the information database, and to trace the insulating oil to be traced and the insulating paper to be traced respectively according to the comparison results.

6. An electronic device, characterized in that: include: 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 perform the method described in any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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