Transformer digital prototype based on COMSOL and design method thereof

Abstract

The invention provides a transformer digital prototype based on COMSOL and a design method thereof, and belongs to the technical field of electrical equipment digitization, and the method comprises the steps: collecting geometric parameters and material attribute parameters of a target transformer; establishing a geometric model and a solution domain of the target transformer in COMSOL multi-physics field simulation software, and setting material attribute parameters of corresponding parts of the target transformer; setting an excitation size, a boundary condition and a grid division mode, and selecting an electromagnetic module, a structural force field module and a sound field module to form a transformer digital prototype preliminary model; and making a graphical user interface of the transformer digital prototype on the basis of the preliminary model of the transformer digital prototype to form the transformer digital prototype. The digital prototype can simulate the noise characteristics of the transformer in the over-excitation and over-load operation states, improves the numerical support for the subsequent maintenance of the transformer, and improves the adaptability of the digital prototype of the transformer to a certain extent.

Description

Technical Field

[0001] The present invention belongs to the technical field of digital power equipment, and in particular relates to a digital prototype of a transformer based on COMSOL and a design method thereof. Background Art

[0002] Currently, transformers in power systems are key devices that convert electrical energy from one voltage level to another, playing an indispensable role in power transmission and distribution. The proper operation of transformers is crucial to ensuring stable grid operation and power supply quality. Traditionally, transformer monitoring has relied primarily on parameters such as temperature, oil quality, and current. While these methods can provide some basic information about the transformer's status, they have limited ability to detect subtle changes or potential faults.

[0003] As an improvement, monitoring based on unconventional signals such as vibration and noise has gradually become a new direction for transformer condition monitoring. Transformer fault noise data is an important supporting data for fault diagnosis research. However, due to the high cost and safety issues of transformer fault testing, current transformer monitoring and analysis systems cannot relatively accurately obtain transformer vibration and noise data under different operating conditions, making it impossible to quickly and accurately diagnose transformer faults. Summary of the Invention

[0004] The present invention provides a transformer digital prototype based on COMSOL and a design method thereof, aiming to solve the problem that the current transformer monitoring and analysis system cannot relatively accurately obtain the vibration and noise data of the transformer under different operating states, and thus cannot perform rapid and accurate fault diagnosis of the transformer.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A design method for a transformer digital prototype based on COMSOL includes the following steps: S1. Collect the geometric parameters and material property parameters of the target transformer and integrate them to form basic model data; S2. Based on the basic model data, establish the geometric model and solution domain of the target transformer in COMSOL multi-physics field simulation software, and set the material property parameters of the corresponding components of the target transformer; S3. Set the excitation size, boundary conditions, and meshing method in COMSOL multi-physics simulation software, and select the electromagnetic module, structural force field module, and acoustic field module to form a preliminary model of the transformer digital prototype; S4. In COMSOL multi-physics simulation software, a graphical user interface of the transformer digital prototype is created based on the preliminary model of the transformer digital prototype to form the transformer digital prototype.

[0006] In some embodiments, in S1 , the geometric parameters of the target transformer include geometric dimensions, ratings, and bolt preload of the target transformer; and the material property parameters of the target transformer include electrical conductivity, magnetic permeability, density, Young's modulus, and Poisson's ratio.

[0007] In some embodiments, in S2 , the geometric model of the target transformer includes structural components, transformer oil, a transformer oil tank, high and low voltage windings, and an iron core.

[0008] Furthermore, in S2, the core material properties also include the saturation magnetization, initial magnetic susceptibility, saturation magnetostriction coefficient, and BH curve of the core material.

[0009] Furthermore, in S3, the electromagnetic module selects a transient solver and sets the solution step size and range to perform electromagnetic calculations of the target transformer.

[0010] Furthermore, in S3, the structural force field module selection specifically includes: Based on the electromagnetic calculation results of the target transformer, the stress distribution and displacement on the iron core are calculated using a nonlinear magnetostrictive model. The nonlinear magnetostrictive model is added to the COMSOL multi-physics simulation software, with the iron core selected as the geometry, the solid mechanics and magnetic field physics interface as the coupling interface, and the magnetostrictive model set to isotropic.

[0011] Furthermore, in S3, the acoustic field module is used to calculate the sound pressure level distribution around the target transformer; an acoustic-structure boundary model is added to the interface of the COMSOL multi-physics simulation software, the boundary is selected as the outer surface of the transformer tank, and the coupling interface is the pressure acoustics and solid mechanics physics field interface.

[0012] In some implementations, in S3, setting the incentive size specifically includes: Based on the basic model data of the transformer, the circuit form, excitation size, and electrical connection method of the winding are set in the COMSOL multi-physics field simulation software. The preload force on different structural components of the target transformer is also set. The excitation method of the target transformer under different operating conditions is also set.

[0013] In some embodiments, in S3, the graphical user interface of the transformer digital prototype includes file operations, parameter input, geometry creation, meshing, physical field settings, solution settings, result display, result export, and result saving.

[0014] The present invention also provides a COMSOL-based transformer digital prototype, which is designed and formed using the COMSOL-based transformer digital prototype design method. The transformer digital prototype includes a basic data integration module, a geometric modeling and material property module, a physical field setting and solution module, and a graphical user interface module, wherein: The basic data integration module is used to collect the geometric parameters and material property parameters of the target transformer; The geometric modeling and material properties module is used to establish the geometric model of the target transformer in the COMSOL multi-physics field simulation software, and set the material property parameters of the corresponding components of the target transformer; The physics field setup and solution module is used to set the excitation size and boundary conditions in the COMSOL multi-physics field simulation software, select the electromagnetic module, structural force field module, and acoustic field module for coupled simulation, set the meshing method, and select the solution algorithm; The graphical user interface module is used to create a graphical user interface for the transformer digital prototype in COMSOL multi-physics simulation software.

[0015] Compared with the prior art, the transformer digital prototype and design method based on COMSOL of the present invention have the following beneficial effects: The present invention provides a transformer digital prototype based on COMSOL, comprising the following steps: S1, collecting geometric parameters and material property parameters of a target transformer, and integrating them to form basic model data; S2, establishing a geometric model and a solution domain of the target transformer in COMSOL multi-physics simulation software based on the basic model data, and setting material property parameters of corresponding components of the target transformer; S3, setting excitation size, boundary conditions and meshing mode in COMSOL multi-physics simulation software, selecting an electromagnetic module, a structural force field module and an acoustic field module, and forming a preliminary model of a transformer digital prototype; S4, in COMSOL multi-physics simulation software, making a graphical user interface of the transformer digital prototype based on the preliminary model of the transformer digital prototype, and forming a transformer digital prototype. Based on the above, the present invention uses COMSOL multi-physics simulation software to build an electromagnetic calculation module, a structural force field calculation module and an acoustic field calculation module, uses a nonlinear magnetostrictive model and an acoustic-structure boundary to achieve electromagnetic-structure-acoustic field coupling, and uses the graphical user interface of the digital prototype to quickly obtain calculation results of corresponding parameters of the transformer by inputting and modifying parameters, thereby providing an efficient human-computer interaction platform. The digital prototype of the present invention can simulate the noise characteristics of transformers under overexcitation and overload conditions. By collecting and processing these signals, it can provide data samples for transformer fault diagnosis based on soundprint signals, improving numerical support for subsequent transformer maintenance and having excellent applicability. In addition, the present invention uses a software developer to create a graphical user interface for the digital prototype, allowing non-professionals lacking finite element simulation analysis skills to quickly obtain calculation results by modifying parameters, thereby improving the applicability of the transformer digital prototype to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 A schematic flow chart of a transformer digital prototype and a design method thereof based on COMSOL of the present invention; Figure 2 Schematic diagram of the structure of a transformer geometric model in an embodiment of a transformer digital prototype and a design method thereof based on COMSOL of the present invention; Figure 3 The present invention is a transformer digital prototype based on COMSOL and its design method Figure 1 Schematic diagram of stress distribution of transformer geometric model; Figure 4 The present invention is a transformer digital prototype based on COMSOL and its design method Figure 1Schematic diagram of the sound pressure level distribution of the transformer geometric model; Figure 5 The present invention provides a COMSOL-based transformer digital prototype and a schematic diagram of a digital prototype graphical user interface in its design method. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] How to effectively and accurately simulate the noise characteristics of the transformer under overexcitation and overload operating conditions, and then accurately monitor and analyze the transformer.

[0025] like Figure 1 As shown, the present invention provides a design method for a transformer digital prototype based on COMSOL, comprising the following steps: Step 1: Collect the geometric dimensions, ratings, bolt preloads, and material properties of each transformer component. Step 2: Establish a geometric model. Based on the geometric information of the transformer, establish a geometric model of the transformer and a solution domain in COMSOL. The solution domain material is air and the size is 1.5 times the longest side of the transformer. Step 3: Set the material properties. Based on the material properties of each component of the transformer, set different material properties for each component in COMSOL. Step 4: Set the excitation magnitude and boundary conditions. Based on the transformer's electrical connection method and rating, set the winding circuit form and excitation magnitude in COMSOL. Based on the transformer's bolt preload data, set the preload magnitude on different structural components. Step 5: Set the meshing method. Based on the geometric characteristics of each component of the transformer, set the meshing method and size of each component in COMSOL. Step 6: Set up the electromagnetic module, select the transient solver, set the solution step size and range, and then perform electromagnetic calculations on the transformer. Step 7: In the structural force field module settings, set "Unsolved variables" to electromagnetic module calculation to inherit the electromagnetic module calculation results. Set the core to a nonlinear magnetostrictive material. In the multiphysics interface, add a nonlinear magnetostrictive model to calculate the stress distribution and displacement on the core. Step 8: In the acoustic field module settings, set "Unsolved variable values" to the structural mechanics module calculation, inherit the calculation results of the structural mechanics module, add the acoustic-structure boundary model in the multiphysics interface, and then calculate the acoustic field distribution around the transformer; Step 9: App development. Use the app developer in COMSOL software to create a graphical user interface for the transformer digital prototype, set input and output parameters and function area buttons, and compile the completed graphical user interface and calculation module into an independent executable app.

[0026] The present invention is based on the design method of the transformer digital prototype of COMSOL, which collects the detailed geometric parameters and material property parameters of the target transformer and integrates them to form basic model data, thereby providing accurate and reliable input for subsequent geometric modeling and simulation. This ensures the comprehensiveness and accuracy of the digital prototype when simulating the performance of the transformer. The present invention utilizes COMSOL multi-physics field simulation software to realize the coupled simulation of multiple physical fields such as electromagnetic, structural force field and acoustic field. This capability enables the digital prototype to more realistically simulate the complex physical phenomena of the transformer in actual operation, such as the distribution of the electromagnetic field, the stress and displacement of the iron core, and the sound pressure level distribution around the transformer. Through the graphical user interface module, the present invention allows users to conveniently perform operations such as file operation, parameter input, geometry establishment, meshing, physical field setting, solution setting, result display, result export and result saving, thereby improving efficiency while ensuring accuracy.

[0027] In some embodiments, the material properties of the transformer components of the present invention include electrical conductivity, magnetic permeability, density, Young's modulus, and Poisson's ratio. The core material requires additional information regarding its saturation magnetization, initial magnetic susceptibility, saturation magnetostriction coefficient, and BH curve. The transformer's ratings include rated voltage, rated current, and the number of turns for both high- and low-voltage windings.

[0028] The excitation modes of the transformer under different operating conditions include: Under normal operating conditions, the excitation adopts voltage excitation, and the high-voltage side is connected to the phase difference , a sinusoidal AC voltage with an amplitude of 10kV; in the overexcitation operation state, the voltage excitation amplitude is set to 1.2 times the rated voltage, and other conditions remain unchanged; in the overload operation state, the high voltage side is connected to the phase difference , a sinusoidal AC voltage with an amplitude of 10kV, and a current excitation is set on the low-voltage side with an amplitude of 1.5 times the rated current.

[0029] The graphical user interface development basis of the present invention is the APP developer in COMSOL software. The graphical user interface should include functions such as file operation, parameter input, geometry establishment, mesh division, physical field setting, solution setting, result display, result export, and result saving.

[0030] The present invention also provides a transformer digital prototype based on COMSOL, which includes: Basic data integration module; responsible for collecting the geometric parameters and material property parameters of the target transformer, where the geometric parameters include the geometric dimensions, rated values ​​and bolt preload of the target transformer, and the material property parameters include conductivity, magnetic permeability, density, Young's modulus and Poisson's ratio, and integrating these data to form basic model data to provide input for subsequent modeling.

[0031] The geometry modeling and material property setting module uses the basic model data provided by the basic data integration module to build a geometric model of the target transformer in COMSOL multiphysics simulation software. This geometric model includes structural components, transformer oil, transformer tank, high- and low-voltage windings, and the core. At the same time, the material property parameters of the corresponding components of the target transformer are set. In particular, for the core material, the saturation magnetization, initial magnetic susceptibility, saturation magnetostriction coefficient, and BH curve are also required.

[0032] Physics field setup and solution module. In COMSOL multiphysics simulation software, set the excitation magnitude and boundary conditions, and select the electromagnetic module, structural force field module, and acoustic field module for coupled simulation. In the electromagnetic module, select the transient solver, set the solution step size and range, and perform electromagnetic calculations on the target transformer. Based on the electromagnetic calculation results, the structural force field module uses a nonlinear magnetostrictive model to calculate the stress distribution and displacement on the core. The acoustic field module calculates the sound pressure level distribution around the target transformer. Furthermore, you need to set the meshing method and select an appropriate solution algorithm.

[0033] A graphical user interface (GUI) creation module builds a GUI for the transformer digital prototype using the preliminary model in COMSOL multiphysics simulation software. This interface includes functions for file manipulation, parameter input, geometry creation, meshing, physics settings, solution settings, result display, result export, and result saving, facilitating model creation, simulation solutions, and result analysis.

[0034] The transformer digital prototype of the present invention provides powerful support for transformer design and optimization. Through simulation analysis, users can gain a deeper understanding of the transformer's performance characteristics, identify problems, and implement targeted improvements, helping to reduce design costs and improve product reliability and performance. Furthermore, the digital prototype of the present invention is not only applicable to transformer design and optimization but can also be extended to simulation analysis of other power equipment and systems, demonstrating its promising application prospects.

[0035] The following is a detailed description of a COMSOL-based transformer digital prototype and a design method thereof according to the present invention through specific embodiments.

[0036] like Figure 2-Figure 4As shown in the figure, a certain type of transformer is selected as the target transformer, and a digital prototype of the transformer is established. The digital prototype design method includes the following steps: Step 1: Collect the geometric dimensions, ratings, bolt preloads, and material properties of each transformer component. Table 1 Main technical parameters of transformer

[0037] Table 2 Material properties of transformer components

[0038] Step 2: Establish a geometric model. Based on the geometric information of the transformer, establish a geometric model of the transformer in COMSOL. The transformer model consists of structural parts, transformer oil, transformer oil tank, high and low voltage windings, and iron core.

[0039] Step 3: Set the material properties. According to the material properties of each transformer component in Table 2, set different material properties for each component in COMSOL. The material properties include conductivity, relative dielectric constant, density, Young's modulus, Poisson's ratio, relative magnetic permeability and sound velocity. The saturation magnetization intensity, initial magnetic susceptibility and saturation magnetostriction coefficient of the core material need to be added as follows: , 200, 200ppm.

[0040] Step 4: Set the excitation size and boundary conditions. According to the main technical parameters of the transformer in Table 1, set the circuit form and excitation size of the winding in COMSOL. The electrical connection mode of the transformer is Dyn11. Based on the bolt preload data of the transformer, set the preload size on different structural parts. Under normal operating conditions, the excitation adopts voltage excitation, and the high-voltage side is connected to the phase difference , a sinusoidal AC voltage with an amplitude of 10kV; in the overexcitation operation state, the voltage excitation amplitude is set to 1.2 times the rated voltage, and other conditions remain unchanged; in the overload operation state, the high voltage side is connected to the phase difference , a sinusoidal AC voltage with an amplitude of 10kV, and a current excitation is set on the low-voltage side with an amplitude of 1.5 times the rated current.

[0041] Step 5: Set the meshing method. Based on the geometric characteristics of each component of the transformer, set the meshing method and size of each component in COMSOL. The transformer core, structural parts, and oil tank are meshed using tetrahedral meshes with a refined size. The transformer windings are meshed using a swept mesh.

[0042] Step 6: Set up the electromagnetic module, select the transient solver, set the solution step and range, and then perform electromagnetic calculations on the transformer; set the solution step to 0.005s, the total solution time to 1.2s, and the solver to PARDISO.

[0043] Step 7: Structural force field module settings. Based on the electromagnetic calculation results of the transformer, use the nonlinear magnetostrictive model to calculate the stress distribution and displacement on the iron core. Add the nonlinear magnetostrictive model in the COMSOL multiphysics interface, select the iron core as the geometry, the solid mechanics and magnetic field physics interface as the coupling interface, and set the magnetostrictive model to isotropic.

[0044] Step 8: Set up the acoustic field module. Based on the transformer structural force field calculation results, use the acoustic field calculation module to calculate the sound pressure level distribution around the transformer. Add an acoustic-structure boundary model to the COMSOL multiphysics interface, select the outer surface of the oil tank as the boundary, and use the pressure acoustics and solid mechanics physics interface as the coupling interface.

[0045] like Figure 5 As shown in step 9, App development, use the App Developer in COMSOL software to create a graphical user interface for the transformer digital prototype. Create a form in the App Developer, which includes a function area, input and output window, and graphics window. The function area is on the upper side of the page, the input and output window is on the lower left side of the page, and the graphics window is on the lower right side of the page. Set function icons such as Open File, Geometry, Mesh, Electromagnetic Calculation, Structural Force Field Calculation, Acoustic Field Calculation, Magnetic Flux Density Model Rendering, Stress Rendering, Sound Pressure Level Rendering, and Save App in the function area. Set input parameters in the input and output window, including high-voltage side rated voltage, high-voltage winding turns, low-voltage winding turns, core preload, solution step size, and total solution time. Set output parameters in the output window, including stress data and sound pressure level data. The graphics window can display the geometric model, meshing results, calculation cloud map, and calculation data. Click Compiler to compile the completed graphical user interface and calculation module into an independent executable App.

[0046] The present invention provides a COMSOL-based transformer digital prototype and design method, enabling precise simulation of transformer performance. By integrating the geometric and material parameters of the target transformer, a highly accurate digital transformer prototype is constructed. This transformer digital prototype can realistically reflect the complex physical phenomena of the transformer in terms of electromagnetics, structural force fields, and acoustic fields. The integration of a graphical user interface enhances the convenience of simulation operations. Furthermore, this invention reduces design costs and improves product reliability and performance.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A design method for a transformer digital prototype based on COMSOL, characterized in that: The steps include: S1. Collect the geometric parameters and material property parameters of the target transformer and integrate them to form basic model data; S2. Based on the basic model data, establish the geometric model and solution domain of the target transformer in COMSOL multi-physics field simulation software, and set the material property parameters of the corresponding components of the target transformer; S3. Set the excitation size, boundary conditions, and meshing method in COMSOL multi-physics simulation software, and select the electromagnetic module, structural force field module, and acoustic field module to form a preliminary model of the transformer digital prototype; S4. In COMSOL multi-physics simulation software, a graphical user interface of the transformer digital prototype is created based on the preliminary model of the transformer digital prototype to form the transformer digital prototype.

2. The design method of transformer digital prototype based on COMSOL according to claim 1, characterized in that: In S1 , the geometric parameters of the target transformer include the geometric dimensions, rated values, and bolt preload of the target transformer; and the material property parameters of the target transformer include electrical conductivity, magnetic permeability, density, Young's modulus, and Poisson's ratio.

3. The design method of transformer digital prototype based on COMSOL according to claim 1, characterized in that: In the S2, the geometric model of the target transformer includes structural parts, transformer oil, transformer oil tank, high and low voltage windings and iron core.

4. The design method of transformer digital prototype based on COMSOL according to claim 3, characterized in that: In S2, the core material properties further include the saturation magnetization, initial magnetic susceptibility, saturation magnetostriction coefficient and BH curve of the core material.

5. The design method of transformer digital prototype based on COMSOL according to claim 3, characterized in that: In S3 , the electromagnetic module selects a transient solver and sets a solution step size and range to perform electromagnetic calculations of the target transformer.

6. The design method of transformer digital prototype based on COMSOL according to claim 5, characterized in that: In said S3, the structural force field module selection specifically includes: Based on the electromagnetic calculation results of the target transformer, the stress distribution and displacement on the iron core are calculated using a nonlinear magnetostrictive model. The nonlinear magnetostrictive model is added to the COMSOL multi-physics simulation software, with the iron core selected as the geometry, the solid mechanics and magnetic field physics interface as the coupling interface, and the magnetostrictive model set to isotropic.

7. The design method of transformer digital prototype based on COMSOL according to claim 6, characterized in that: In the S3, the acoustic field module is used to calculate the sound pressure level distribution around the target transformer; an acoustic-structure boundary model is added to the interface of the COMSOL multi-physics field simulation software, the boundary is selected as the outer surface of the transformer tank, and the coupling interface is the pressure acoustics and solid mechanics physics field interface.

8. The design method of transformer digital prototype based on COMSOL according to claim 1, characterized in that: In S3, setting the excitation magnitude specifically includes: Based on the basic model data of the transformer, the circuit form, excitation size, and electrical connection method of the winding are set in the COMSOL multi-physics field simulation software. The preload force on different structural components of the target transformer is also set. The excitation method of the target transformer under different operating conditions is also set.

9. The design method of transformer digital prototype based on COMSOL according to claim 1, characterized in that: In the S3, the graphical user interface of the transformer digital prototype includes file operation, parameter input, geometry establishment, meshing, physical field setting, solution setting, result display, result export and result saving.

10. A digital prototype of a transformer based on COMSOL, wherein the digital prototype of the transformer is designed based on the design method of a digital prototype of a transformer based on COMSOL according to any one of claims 1 to 9, and is characterized in that: The transformer digital prototype includes a basic data integration module, a geometric modeling and material property module, a physical field setting and solution module, and a graphical user interface module, wherein: The basic data integration module is used to collect the geometric parameters and material property parameters of the target transformer; The geometric modeling and material properties module is used to establish the geometric model of the target transformer in the COMSOL multi-physics field simulation software, and set the material property parameters of the corresponding components of the target transformer; The physics field setup and solution module is used to set the excitation size and boundary conditions in the COMSOL multi-physics field simulation software, select the electromagnetic module, structural force field module, and acoustic field module for coupled simulation, set the meshing method, and select the solution algorithm; The graphical user interface module is used to create a graphical user interface for the transformer digital prototype in COMSOL multi-physics simulation software.

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