A transformer model-based temperature field simulation calculation method and device

Abstract

The application discloses a kind of temperature field simulation calculation method and device based on transformer model, by obtaining and according to transformer parameter, transformer three-dimensional one-grade model is constructed, wherein the transformer three-dimensional one-grade model includes core, single-phase winding and oil tank;Based on the model single-phase current of the transformer three-dimensional one-grade model is calculated, the model single-phase current calculated is input into the transformer three-dimensional one-grade model, and the single-phase loss density of transformer is obtained;The model simulation parameter of transformer is set, according to the model simulation parameter and the single-phase loss density, the transformer three-dimensional one-grade model is iterated and simulated, and the transformer temperature field simulation result is obtained.Compared with prior art, the technical scheme of the present application simplifies the existing transformer model, solves the problem of large amount of calculation, difficult mesh partitioning and long calculation time in the existing three-dimensional full model, and can improve the simulation calculation efficiency of transformer three-dimensional one-grade model.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a temperature field simulation calculation method and device based on a transformer model. BACKGROUND

[0002] At present, with the wide application of commercial finite element analysis software, the simulation operation of the transformer and the related experiments with dangerous damage play a great role in promoting. The gradual improvement of computer computing power makes it possible to realize the fine simulation analysis by using the finite element method. With the improvement of the model refinement degree and the subdivision, it still leads to the need of a large amount of time, energy and resources to obtain relatively accurate calculation results in the prior art.

[0003] The existing transformer model is large in size, complex in structure, and requires more computer resources and computing time. How to improve the existing transformer model so that it can obtain more accurate calculation results in the process of calculating the short-circuit resistance of the transformer and the fluid-temperature field coupling simulation is a technical problem to be solved at present. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a temperature field simulation calculation method and device based on a transformer model, which can improve the simulation calculation efficiency of a three-dimensional one-level model of the transformer.

[0005] In order to solve the above technical problems, the present application provides a temperature field simulation calculation method based on a transformer model, comprising:

[0006] A three-dimensional one-level model of the transformer is constructed according to the transformer parameters, wherein the three-dimensional one-level model of the transformer includes a core, a single-phase winding and an oil tank;

[0007] The model single-phase current of the three-dimensional one-level model of the transformer is calculated based on the algorithm, and the calculated model single-phase current is input into the three-dimensional one-level model of the transformer to obtain the single-phase loss density of the transformer.

[0008] The model simulation parameters of the transformer are set, and the three-dimensional one-level model of the transformer is iteratively simulated according to the model simulation parameters and the single-phase loss density to obtain the temperature field simulation result of the transformer.

[0009] In a possible implementation manner, the single-phase winding includes a single-phase high-voltage winding and a single-phase low-voltage winding.

[0010] The single-phase high-voltage winding includes a first line cake, a first cushion block, a first support bar and a first end ring.

[0011] The single-phase low-voltage winding includes a second line cake, a second cushion block, a second support bar and a second end ring.

[0012] In one possible implementation, model simulation parameters for the transformer are set, wherein the model simulation parameters include the transformer temperature field state, gravitational acceleration, transformer fluid material, transformer solid material, fluid velocity, and boundary conditions.

[0013] In one possible implementation, the single-phase current of the transformer's three-dimensional first-stage model is calculated based on a single-phase current, and the calculated single-phase current is input into the transformer's three-dimensional first-stage model to obtain the transformer's single-phase loss density, specifically including:

[0014] The single-phase current of the transformer is calculated based on the calculation of the single-phase current, and the single-phase current is used as the model single-phase current of the three-dimensional first-stage model of the transformer.

[0015] The single-phase current of the model is input into the three-dimensional model of the transformer in the form of a formula, so that the three-dimensional model of the transformer can simulate the single-phase current of the model to obtain the iron loss and copper loss of the transformer. Based on the iron loss and the copper loss, the single-phase loss density of the transformer is calculated and output.

[0016] The present invention also provides a temperature field simulation calculation device based on a transformer model, including: a transformer three-dimensional first-stage model construction module, a single-phase loss density calculation module, and a transformer temperature field simulation result acquisition module;

[0017] The transformer three-dimensional first-stage model construction module is used to acquire and construct a transformer three-dimensional first-stage model based on transformer parameters. The transformer three-dimensional first-stage model includes the core, single-phase winding, and oil tank.

[0018] The single-phase loss density calculation module is used to calculate the model single-phase current of the three-dimensional first-stage model of the transformer based on the calculation, and input the calculated model single-phase current into the three-dimensional first-stage model of the transformer to obtain the single-phase loss density of the transformer.

[0019] The transformer temperature field simulation result acquisition module is used to set the model simulation parameters of the transformer, and perform iterative simulation processing on the three-dimensional first-stage model of the transformer based on the model simulation parameters and the single-phase loss density to obtain the transformer temperature field simulation results.

[0020] In one possible implementation, the single-phase winding in the transformer three-dimensional first-stage model construction module includes a single-phase high-voltage winding and a single-phase low-voltage winding.

[0021] The single-phase high-voltage winding includes a first coil, a first pad, a first support bar, and a first end ring.

[0022] The single-phase low-voltage winding includes a second coil, a second pad, a second support bar, and a second end ring.

[0023] In one possible implementation, the transformer temperature field simulation result acquisition module is used to set the transformer model simulation parameters, wherein the model simulation parameters include the transformer temperature field state, gravitational acceleration, transformer fluid material, transformer solid material, fluid velocity, and boundary conditions.

[0024] In one possible implementation, the single-phase loss density calculation module is used to calculate the model single-phase current of the three-dimensional first-stage model of the transformer based on a calculation, and input the calculated model single-phase current into the three-dimensional first-stage model of the transformer to obtain the single-phase loss density of the transformer, specifically including:

[0025] The single-phase current of the transformer is calculated based on the calculation of the single-phase current, and the single-phase current is used as the model single-phase current of the three-dimensional first-stage model of the transformer.

[0026] The single-phase current of the model is input into the three-dimensional model of the transformer in the form of a formula, so that the three-dimensional model of the transformer can simulate the single-phase current of the model to obtain the iron loss and copper loss of the transformer. Based on the iron loss and the copper loss, the single-phase loss density of the transformer is calculated and output.

[0027] The present invention also provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the temperature field simulation calculation method based on the transformer model as described in any of the preceding claims.

[0028] The present invention also provides a computer-readable storage medium comprising a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the temperature field simulation calculation method based on the transformer model as described in any of the preceding claims.

[0029] This invention provides a method and apparatus for simulating and calculating the temperature field based on a transformer model, which has the following advantages compared with the prior art:

[0030] By acquiring and based on transformer parameters, a three-dimensional single-phase model of the transformer is constructed, comprising the core, single-phase windings, and tank. The single-phase current of the transformer's three-dimensional single-phase model is calculated using a single-phase current calculation and input into the model to obtain the single-phase loss density. The transformer's model simulation parameters are set, and iterative simulation processing is performed on the three-dimensional single-phase model based on these parameters and the single-phase loss density to obtain the transformer temperature field simulation results. Compared with existing technologies, this invention simplifies existing transformer models, solving the problems of large computational load, difficult mesh generation, and long computation time in existing three-dimensional full models, thus improving the simulation efficiency of the transformer's three-dimensional single-phase model. Attached Figure Description

[0031] Figure 1 This is a flowchart illustrating an embodiment of a temperature field simulation calculation method based on a transformer model provided by the present invention.

[0032] Figure 2 This is a schematic diagram of an embodiment of a temperature field simulation calculation device based on a transformer model provided by the present invention;

[0033] Figure 3 This is a schematic diagram of a three-dimensional first-stage transformer model according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of a three-dimensional first-stage transformer model according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the iterative simulation process of a three-dimensional first-stage transformer model according to an embodiment of the present invention;

[0036] Figure 6 This is a temperature field distribution cloud map of a single-phase high-voltage winding according to an embodiment of the present invention;

[0037] Figure 7 This is a temperature field distribution cloud map of a single-phase low-voltage winding according to an embodiment of the present invention;

[0038] Figure 8 This is a temperature distribution cloud map of a transformer core according to an embodiment of the present invention;

[0039] Figure 9 This is a temperature distribution cloud map of the support bar according to an embodiment of the present invention;

[0040] Figure 10 This is a temperature distribution diagram of a pad block according to an embodiment of the present invention;

[0041] Figure 11This is an oil flow distribution diagram according to an embodiment of the present invention;

[0042] Figure 12 This is a winding region oil flow distribution diagram provided by an embodiment of the present invention. Detailed Implementation

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Example 1

[0045] See Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of a temperature field simulation calculation method based on a transformer model provided by the present invention. Figure 1 As shown, the method includes steps 101-104, as detailed below:

[0046] Step 101: Obtain and construct a three-dimensional model of the transformer based on the transformer parameters. The three-dimensional model of the transformer includes the core, single-phase windings, and oil tank.

[0047] In one embodiment, when modeling transformers, it is common practice to build a three-phase full model of the transformer. However, transformer models are very complex. Considering the detailed meshing of the three-phase full model will increase the amount of computation and cause too many floating-point numbers to cause errors during simulation.

[0048] In one embodiment, since a single phase of a transformer can be approximated as a fully symmetrical cylinder, based on this characteristic, the existing three-phase transformer model is simplified. The existing three-phase converter model, which includes phase A, phase B, and phase C windings, is simplified to include only a single-phase winding. A refined model of this single-phase winding is then performed to obtain a three-dimensional first-stage model of the transformer, such as... Figure 3 As shown, Figure 3 This is a schematic diagram of a three-dimensional first-stage model of a transformer.

[0049] Preferably, since the B-phase winding is located in the middle of the structure and the temperature rise is most significant, the single-phase winding is set as the B-phase winding.

[0050] In one embodiment, the single-phase winding includes a single-phase high-voltage winding and a single-phase low-voltage winding, such as... Figure 3 As shown, Figure 3 This is a schematic diagram of a three-dimensional transformer model. From left to right, the diagram shows the iron core, the single-phase low-voltage winding, the single-phase high-voltage winding, and the oil tank.

[0051] In one embodiment, the single-phase winding is modeled in detail, which may include transformer windings, support bars, spacers, end insulation, etc. Specifically, the single-phase winding includes a single-phase high-voltage winding and a single-phase low-voltage winding. The single-phase high-voltage winding includes a first coil, a first spacer, a first support bar, and a first end ring. The single-phase low-voltage winding includes a second coil, a second spacer, a second support bar, and a second end ring. Based on the transformer model-related data in the obtained transformer calculation sheet, a model for rapid calculation of transformer fluid-temperature field coupling simulation is established based on the relevant parameters of the actual transformer model.

[0052] Preferably, the first wire disc, the first pad, the first support bar, the first end ring, the second wire disc, the second pad, the second support bar, and the second end ring all have the same shape and size as the actual transformer components; the transformer calculation sheet is known data.

[0053] In one embodiment, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the mesh partitioning of a single-phase winding in a three-dimensional transformer model. As shown in the diagram, the three-dimensional transformer model includes a single-phase low-voltage winding 1 and a single-phase high-voltage winding 2, transformer support bars 3, and transformer pads 4. Under short-circuit current impact, according to the transformer's operating mode, when the high and low voltage input currents are in opposite directions, the electromagnetic forces on the single-phase high and low voltage windings will be in opposite directions (high voltage outwards, low voltage inwards, which can be derived from the principle of opposite attraction). Under the impact of the short-circuit peak current at 10ms, the single-phase high and low voltage windings may deform under the electromagnetic force. The support bars and pads corresponding to the single-phase high and low voltage windings can, in practice, fix the windings, act as interlayer supports and insulation, and form heat dissipation oil channels or air channels. In practical applications, under the impact of short-circuit current, the support bars and pads can also effectively prevent the radial and axial forces on the high and low voltage windings from damaging the windings. With the support and fixation of the support bars and pads, the windings' ability to resist collapse, warping, and instability is greatly improved. Compared to two-dimensional simulation models, it is impossible to add support bars and pads to the model. As a result, the transformer is constantly in the process of heating and dissipating heat during long-term operation. Under the long-term thermal stress, the elastic modulus of materials such as winding pads, pressure plates, and support bars will decrease and the thickness will shrink. This will gradually cause the support structure to loosen, the coil stiffness to decrease, and thus affect the short-circuit withstand capability of the coil.

[0054] Step 102: Calculate the single-phase current of the three-dimensional model of the transformer based on the calculation, and input the calculated single-phase current into the three-dimensional model of the transformer to obtain the single-phase loss density of the transformer.

[0055] In one embodiment, based on the three-phase symmetry of the transformer, an excitation method is used in the modeling analysis to analyze individual windings of the transformer. The single-phase current of the transformer is calculated based on the single winding, and the single-phase current is used as the model single-phase current of the three-dimensional first-level model of the transformer.

[0056] In one embodiment, after calculating the single-phase current of the model, a single-phase current of the model is inserted at the cross-section of the single-phase winding of the model; specifically, the single-phase current of the model is input into the three-dimensional first-stage model of the transformer in the form of a formula input.

[0057] In one embodiment, the three-dimensional model of the transformer simulates the single-phase current of the model to obtain the iron loss and copper loss of the transformer. Based on the iron loss and copper loss, the single-phase loss density of the transformer is calculated and output. Specifically, the three-dimensional model of the transformer can directly output the single-phase loss density of the transformer based on the single-phase current of the inserted model. The single-phase loss density of the transformer includes the loss density of the iron core, the loss density of the high-voltage winding, and the loss density of the low-voltage winding. In this embodiment, the single-phase loss density of the transformer is used as the heat source for calculating the temperature field.

[0058] Step 103: Set the model simulation parameters of the transformer. Based on the model simulation parameters and the single-phase loss density, perform iterative simulation processing on the three-dimensional first-stage model of the transformer to obtain the simulation results of the transformer temperature field.

[0059] In one embodiment, model simulation parameters for the transformer are set, wherein the model simulation parameters include transformer temperature field state, gravitational acceleration, transformer fluid material, transformer solid material, fluid velocity, and boundary conditions.

[0060] Specifically, the temperature field state of the transformer can be set to either transient or static.

[0061] Specifically, since gravity affects the oil flow, a gravitational acceleration is also set, which is -9.78 in the z-direction.

[0062] Specifically, transformer fluid materials and transformer solid materials are set, wherein the transformer fluid material is oil, and the transformer solid materials are copper, silicon steel, and epoxy resin; for the set materials, it is also necessary to set the corresponding material properties of each material. For example, for the transformer fluid material, its material properties include density, specific heat, thermal conductivity, and dynamic viscosity.

[0063] Preferably, the material of the single-phase winding in the three-dimensional model of the transformer is set to copper, and the iron core is set to silicon steel.

[0064] Specifically, boundary conditions are set for the three-dimensional model of the transformer, including setting inlet and outlet boundaries, inner boundaries and solid boundaries, and oil flow velocity can be set at the inlet and outlet positions for the inlet and outlet boundaries.

[0065] Preferably, when the model simulation parameters of the transformer are changed, only the changed model simulation parameters need to be initialized.

[0066] In one embodiment, based on the set transformer model parameters and the single-phase loss density, the transformer model parameters are substituted into the three-dimensional first-level model of the transformer to complete the setting of the parameters of the three-dimensional first-level model of the transformer.

[0067] In one embodiment, the established three-dimensional model of the transformer is subjected to iterative simulation processing to obtain the simulation results of the transformer temperature field. Preferably, 220 iterations of simulation processing are performed on the three-dimensional model of the transformer.

[0068] In one embodiment, during the iterative simulation of the three-dimensional model of the transformer, the simulation process is converted into a line drawing. It is then determined whether there are sharp spike regions in the line drawing. If so, the number of iterations for the three-dimensional model of the transformer is increased, so that the three-dimensional model of the transformer undergoes iterative simulation again, until it is determined that there are no sharp spike regions in the line drawing. Figure 5 As shown, Figure 5 This is a schematic diagram of the iterative simulation process of a three-dimensional first-stage model of a transformer.

[0069] In one embodiment, after completing the iterative simulation processing of the three-dimensional first-stage model of the transformer, the simulation results of the transformer temperature field can be obtained. These simulation results include temperature field distribution cloud maps of single-phase high-voltage windings, single-phase low-voltage windings, transformer core temperature distribution cloud maps, bar temperature distribution cloud maps, pad temperature distribution maps, oil flow distribution maps, and winding region oil flow distribution maps. Figure 6 As shown, Figure 6 This is a cloud map showing the temperature field distribution of a single-phase high-voltage winding; such as... Figure 7 As shown, Figure 7 This is a cloud map showing the temperature field distribution of a single-phase low-voltage winding; such as... Figure 8 As shown, Figure 8 It is a temperature distribution cloud map of the transformer core; such as Figure 9 As shown, Figure 9 It is a temperature distribution cloud map of the support bar; such as Figure 10 As shown, Figure 10 This is a temperature distribution diagram of the pad block; such as Figure 11 As shown, Figure 11 It is an oil flow distribution map; such as Figure 12 As shown, Figure 12 This is a diagram showing the oil flow distribution in the winding region.

[0070] In summary, the temperature field simulation calculation method based on a transformer model provided by this invention simplifies the existing three-dimensional full transformer model and constructs a three-dimensional single-stage transformer model containing only a single-phase winding. This solves the problems of large computational load, difficult mesh generation, and long calculation time of the existing three-dimensional full transformer model, and can improve the efficiency of subsequent model simulation calculations. At the same time, compared with the two-dimensional single-phase transformer model, support bars and pads can be added to the three-dimensional single-stage transformer model, making the model more refined. It can not only obtain the temperature rise effect of the winding tank, but also the temperature rise of the support bars and pads and their influence on the temperature distribution.

[0071] Example 2

[0072] See Figure 2 , Figure 2 This is a schematic diagram of an embodiment of a temperature field simulation calculation device based on a transformer model provided by the present invention, as shown below. Figure 2 As shown, the device includes a transformer three-dimensional first-stage model construction module 201, a single-phase loss density calculation module 202, and a transformer temperature field simulation result acquisition module 203, as detailed below:

[0073] The transformer three-dimensional first-stage model construction module 201 is used to acquire and construct a transformer three-dimensional first-stage model based on transformer parameters, wherein the transformer three-dimensional first-stage model includes the core, single-phase winding and oil tank.

[0074] The single-phase loss density calculation module 202 is used to calculate the model single-phase current of the three-dimensional first-stage model of the transformer based on the calculation, and input the calculated model single-phase current into the three-dimensional first-stage model of the transformer to obtain the single-phase loss density of the transformer.

[0075] The transformer temperature field simulation result acquisition module 203 is used to set the model simulation parameters of the transformer, and perform iterative simulation processing on the three-dimensional first-stage model of the transformer according to the model simulation parameters and the single-phase loss density to obtain the transformer temperature field simulation results.

[0076] In one embodiment, the single-phase winding in the transformer three-dimensional first-stage model construction module 201 includes a single-phase high-voltage winding and a single-phase low-voltage winding; wherein, the single-phase high-voltage winding includes a first coil, a first pad, a first support bar, and a first end ring; and the single-phase low-voltage winding includes a second coil, a second pad, a second support bar, and a second end ring.

[0077] In one embodiment, the transformer temperature field simulation result acquisition module 203 is used to set the model simulation parameters of the transformer, wherein the model simulation parameters include the transformer temperature field state, gravitational acceleration, transformer fluid material, transformer solid material, fluid velocity, and boundary conditions.

[0078] In one embodiment, the single-phase loss density calculation module 202 is used to calculate the model single-phase current of the three-dimensional first-stage transformer model based on the calculation sheet, and input the calculated model single-phase current into the three-dimensional first-stage transformer model to obtain the single-phase loss density of the transformer. Specifically, this includes: calculating the single-phase current of the transformer based on the calculation sheet, and using the single-phase current as the model single-phase current of the three-dimensional first-stage transformer model; inputting the model single-phase current into the three-dimensional first-stage transformer model in the form of a formula input, so that the three-dimensional first-stage transformer model can simulate the model single-phase current to obtain the iron loss and copper loss of the transformer; and calculating and outputting the single-phase loss density of the transformer based on the iron loss and the copper loss.

[0079] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0080] It should be noted that the above embodiment of the temperature field simulation calculation device based on the transformer model is merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0081] Based on the above embodiments of the temperature field simulation calculation method based on the transformer model, another embodiment of the present invention provides a temperature field simulation calculation terminal device based on the transformer model. The temperature field simulation calculation terminal device based on the transformer model includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the temperature field simulation calculation method based on the transformer model of any embodiment of the present invention.

[0082] For example, in this embodiment, the computer program can be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in the transformer-based temperature field simulation calculation terminal device.

[0083] The temperature field simulation computing terminal device based on the transformer model can be a desktop computer, laptop, handheld computer, or cloud server, etc. The temperature field simulation computing terminal device based on the transformer model may include, but is not limited to, a processor and memory.

[0084] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. This processor is the control center of the transformer-model-based temperature field simulation computing terminal device, connecting all parts of the device via various interfaces and lines.

[0085] The memory can be used to store the computer programs and / or modules. The processor implements various functions of the temperature field simulation computing terminal device based on the transformer model by running or executing the computer programs and / or modules stored in the memory, and by calling the data stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function, etc.; the data storage area may store data created based on the use of the mobile phone, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (at least one disk storage device, flash memory device, or other volatile solid-state storage device).

[0086] Based on the above embodiments of the temperature field simulation calculation method based on the transformer model, another embodiment of the present invention provides a storage medium, the storage medium including a stored computer program, wherein, when the computer program is running, the device where the storage medium is located controls the execution of the temperature field simulation calculation method based on the transformer model of any embodiment of the present invention.

[0087] In this embodiment, the storage medium is a computer-readable storage medium, and the computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium can include any entity or device capable of carrying the computer program code, recording media, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0088] In summary, this invention discloses a method and apparatus for temperature field simulation calculation based on a transformer model. By acquiring and constructing a three-dimensional single-phase model of the transformer based on transformer parameters, the method includes the core, single-phase windings, and tank. The method calculates the single-phase current of the transformer model based on a single-phase current calculation and inputs it into the three-dimensional single-phase model to obtain the single-phase loss density. The method sets the transformer model simulation parameters and performs iterative simulation processing on the three-dimensional single-phase model based on the simulation parameters and the single-phase loss density to obtain the transformer temperature field simulation results. Compared with existing technologies, the technical solution of this invention simplifies existing transformer models, solves the problems of large computational load, difficult mesh generation, and long calculation time in three-dimensional full models, and improves the simulation calculation efficiency of three-dimensional single-phase transformer models.

[0089] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A method for simulating and calculating the temperature field based on a transformer model, characterized in that, include: A three-dimensional model of the transformer is constructed based on the transformer parameters. The three-dimensional model includes an iron core, a single-phase winding, and an oil tank. The single-phase winding is a B-phase winding and includes a single-phase high-voltage winding and a single-phase low-voltage winding. The single-phase high-voltage winding includes a first coil, a first pad, a first support bar, and a first end ring. The single-phase low-voltage winding includes a second coil, a second pad, a second support bar, and a second end ring. The single-phase current of the transformer is calculated based on the single-phase current of the three-dimensional first-stage model. The calculated single-phase current is then input into the three-dimensional first-stage model of the transformer to obtain the single-phase loss density of the transformer. The model simulation parameters of the transformer are set, including the transformer temperature field state, gravitational acceleration, transformer fluid material, transformer solid material, fluid velocity and boundary conditions. Based on the model simulation parameters and the single-phase loss density, the three-dimensional first-stage model of the transformer is subjected to iterative simulation processing to obtain the transformer temperature field simulation results. In the process of iteratively simulating the three-dimensional model of the transformer, the simulation process is converted into a line graph. It is then determined whether there are any spike regions in the line graph. If so, the number of iterations for the three-dimensional model of the transformer is increased so that the three-dimensional model of the transformer is re-iterated and simulated until it is determined that there are no spike regions in the line graph, thus obtaining the simulation results of the transformer temperature field.

2. The temperature field simulation calculation method based on a transformer model as described in claim 1, characterized in that, Based on the calculation of the single-phase current of the three-dimensional first-stage model of the transformer, the calculated single-phase current is input into the three-dimensional first-stage model of the transformer to obtain the single-phase loss density of the transformer, specifically including: The single-phase current of the transformer is calculated based on the calculation of the single-phase current, and the single-phase current is used as the model single-phase current of the three-dimensional first-stage model of the transformer. The single-phase current of the model is input into the three-dimensional model of the transformer in the form of a formula, so that the three-dimensional model of the transformer can simulate the single-phase current of the model to obtain the iron loss and copper loss of the transformer. Based on the iron loss and the copper loss, the single-phase loss density of the transformer is calculated and output.

3. A temperature field simulation calculation device based on a transformer model, characterized in that, include: The module includes a three-dimensional model construction module for transformers, a single-phase loss density calculation module, and a transformer temperature field simulation result acquisition module. The transformer three-dimensional first-stage model construction module is used to acquire and construct a transformer three-dimensional first-stage model based on transformer parameters. The transformer three-dimensional first-stage model includes an iron core, a single-phase winding, and an oil tank. The single-phase winding is a B-phase winding and includes a single-phase high-voltage winding and a single-phase low-voltage winding. The single-phase high-voltage winding includes a first coil, a first pad, a first support bar, and a first end ring. The single-phase low-voltage winding includes a second coil, a second pad, a second support bar, and a second end ring. The single-phase loss density calculation module is used to calculate the model single-phase current of the three-dimensional first-stage model of the transformer based on the calculation, and input the calculated model single-phase current into the three-dimensional first-stage model of the transformer to obtain the single-phase loss density of the transformer. The transformer temperature field simulation result acquisition module is used to set the model simulation parameters of the transformer. The model simulation parameters include the transformer temperature field state, gravitational acceleration, transformer fluid material, transformer solid material, fluid velocity and boundary conditions. Based on the model simulation parameters and the single-phase loss density, the three-dimensional first-stage model of the transformer is subjected to iterative simulation processing to obtain the transformer temperature field simulation results. In the process of iteratively simulating the three-dimensional model of the transformer, the simulation process is converted into a line graph. It is then determined whether there are any spike regions in the line graph. If so, the number of iterations for the three-dimensional model of the transformer is increased so that the three-dimensional model of the transformer is re-iterated and simulated until it is determined that there are no spike regions in the line graph, thus obtaining the simulation results of the transformer temperature field.

4. The temperature field simulation calculation device based on a transformer model as described in claim 3, characterized in that, The single-phase loss density calculation module is used to calculate the model single-phase current of the three-dimensional first-stage model of the transformer based on the calculation, and input the calculated model single-phase current into the three-dimensional first-stage model of the transformer to obtain the single-phase loss density of the transformer, specifically including: The single-phase current of the transformer is calculated based on the calculation of the single-phase current, and the single-phase current is used as the model single-phase current of the three-dimensional first-stage model of the transformer. The single-phase current of the model is input into the three-dimensional model of the transformer in the form of a formula, so that the three-dimensional model of the transformer can simulate the single-phase current of the model to obtain the iron loss and copper loss of the transformer. Based on the iron loss and the copper loss, the single-phase loss density of the transformer is calculated and output.

5. A terminal device, characterized in that, The method includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the temperature field simulation calculation method based on a transformer model as described in any one of claims 1 to 2.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein the computer program, when executed by a computer, implements the temperature field simulation calculation method based on a transformer model as described in any one of claims 1 to 2.

Images