Transposed conductor winding electromagnetic loss calculation method and related device

Abstract

The invention belongs to the field of power equipment simulation calculation, and discloses a transposed conductor winding electromagnetic loss calculation method and related device.The method comprises the steps that any cake in a pre-established actual transformer geometric model is replaced with a transposed conductor model in sequence, obtaining a combined model after each replacement until cakes at different positions on the transformer geometric model are replaced by using the transposed conductor model; calculating the electromagnetic loss of the transposed conductor model in the combined model after each replacement; and calculating the electromagnetic loss of the transposed conductor winding according to the electromagnetic loss of the transposed conductor model in the combined model after each replacement. According to the method, only the electromagnetic loss of each cake in the transposed conductor winding needs to be calculated each time, and finally the electromagnetic loss of the whole transposed conductor winding is calculated by utilizing the electromagnetic loss of all the cakes, so that the calculation amount each time is relatively small, and the performance requirement on a computer is relatively low.

Description

Technical Field

[0001] The invention belongs to the field of simulation calculation of electric power equipment, and in particular relates to a method for calculating electromagnetic loss of a transposed conductor winding and a related device. Background Art

[0002] Electromagnetic loss refers to the energy loss caused by the absorption and scattering of electromagnetic fields by conductors, insulators and other materials in the electromagnetic field. This loss is mainly manifested as heat energy, that is, the energy form converted into heat by electromagnetic waves. Electromagnetic loss is an important consideration in many fields, especially in electronic devices, communication systems, power transmission and magnetic materials. UHV transformer is one of the key equipment in UHV AC transmission projects. It plays a role in changing the voltage level in the power system. The electromagnetic loss of the transformer is mainly caused by the following aspects: conductivity loss, core loss and insulation loss. Transposed conductors can effectively reduce the electromagnetic loss of UHV transformers and are widely used in the production and manufacturing of UHV transformer windings. However, due to the complex structure of the transposed conductor and the large number of transformer winding coils, if the electromagnetic loss of the transposed conductor winding is directly calculated for the transformer winding with refined modeling, although the calculation result will be more accurate, the large amount of calculation will require too high computer performance. It is difficult for computers with general configuration to calculate the overall electromagnetic loss of the winding. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a method for calculating the electromagnetic loss of a transposed conductor winding and a related device. The present invention only needs to calculate the electromagnetic loss of each cake in the transposed conductor winding each time, and finally uses the electromagnetic loss of all cakes to calculate the electromagnetic loss of the entire transposed conductor winding. In this way, the amount of calculation each time is relatively small, and the performance requirements for the computer are relatively low.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A method for calculating electromagnetic loss of transposed conductor windings includes the following steps: Substituting any one of the pies in the actual pre-established transformer geometric model with the transposed conductor model in turn, until all the pies at different positions on the transformer geometric model are replaced with the transposed conductor model, and obtaining a combined model after each replacement; Calculate the electromagnetic loss of the transposed conductor model in the combined model after each replacement; The electromagnetic loss of the transposed conductor winding is calculated based on the electromagnetic loss of the transposed conductor model in the combined model after each replacement.

[0005] Preferably, the transposed conductor model adopts a refined model of the transposed conductor, and the refined model of the transposed conductor may adopt a transposed conductor model (ie, annular grid model 3) consisting of a unit model of the transposed conductor obtained by refined modeling as disclosed in Chinese patent CN118410642A.

[0006] Preferably, any cake in the pre-established actual transformer geometric model is replaced with the transposed conductor model in sequence until the cakes in all different positions on the transformer geometric model are replaced with the transposed conductor model, and the combined model obtained after each replacement includes: replacing the cakes in the transformer geometric model from the bottom to the top of the transformer core geometric model in the transformer geometric model, or replacing the cakes in the transformer geometric model from the top to the bottom of the transformer core geometric model in the transformer geometric model.

[0007] Preferably, the electromagnetic losses of the transposed conductor models in the combined model after each replacement are superimposed to obtain the electromagnetic losses of the transposed conductor windings.

[0008] Preferably, the outer diameter of the coil model of any pancake in the actual transformer geometric model is the same as the outer diameter of the transposed conductor model.

[0009] The present invention also provides a transposed conductor winding electromagnetic loss calculation system, comprising: Modeling module: used to replace any one of the pre-established actual transformer geometric models with the transposed conductor model in turn, until all the pies at different positions on the transformer geometric model are replaced with the transposed conductor model, and a combined model after each replacement is obtained; The first calculation module is used to calculate the electromagnetic loss of the transposed conductor model in the combined model after each replacement; The second calculation module is used to calculate the electromagnetic loss of the transposed conductor winding according to the electromagnetic loss of the transposed conductor model in the combined model after each replacement.

[0010] The present invention also provides an electronic device, comprising: one or more processors; a storage device having one or more programs stored thereon; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for calculating electromagnetic losses of transposed conductor windings of the present invention as described above.

[0011] The present invention further provides a storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for calculating electromagnetic losses of transposed conductor windings as described above.

[0012] The present invention further provides a computer program product, which includes computer instructions, wherein the computer instructions instruct a computer to execute the method for calculating electromagnetic losses of transposed conductor windings of the present invention as described above.

[0013] The present invention has the following beneficial effects: The method for calculating the electromagnetic loss of the transposed conductor winding provided by the present invention utilizes the transposed conductor model to sequentially replace the model of each pancake in the pre-established actual transformer geometric model, calculates the electromagnetic loss of the transposed conductor model when the transposed conductor model is at each pancake position, and utilizes the electromagnetic loss of the transposed conductor model when it is at each pancake position to finally calculate the accurate result of the electromagnetic loss of the entire transposed conductor winding. Therefore, when calculating, the present invention only needs to calculate the electromagnetic loss of the transposed conductor model at each pancake position each time, which greatly reduces the amount of calculation for a single calculation, reduces the requirements for computer performance, and greatly improves the promotion of the electromagnetic loss calculation of the transposed conductor winding while satisfying the accurate calculation of the electromagnetic loss of the transposed conductor winding. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 is an overall flow chart of a method for calculating electromagnetic loss of a transposed conductor winding in an embodiment of the present invention; Figure 2 It is a three-dimensional modeling of the transposed conductor used in the embodiment of the present invention; Figure 3 It is a combined model after replacing the first pancake winding in the transformer geometric model with the transposed conductor model in the embodiment of the present invention; Figure 4 It is a combined model after replacing the third pancake winding in the transformer geometric model with the transposed conductor model in the embodiment of the present invention; Figure 5 It is an electromagnetic distribution diagram after the first pancake winding in the transformer geometric model is replaced by the transposed conductor model in the embodiment of the present invention; Figure 6 This is an electromagnetic distribution diagram after the third pancake winding in the transformer geometric model is replaced by the transposed conductor model in an embodiment of the present invention.

[0015] In the figure, 1- transposed conductor model; 2- single conductor; 3- transformer core geometry model; 4- pancake coil model; 5- transformer geometry model. DETAILED DESCRIPTION

[0016] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] Combination Figure 3 and Figure 4 The method for calculating electromagnetic loss of transposed conductor winding provided in this embodiment includes the following process: Replace any one of the pre-established actual transformer geometric model 5 with the transposed conductor model 1 until all the different positions of the pies on the transformer geometric model 5 are replaced with the transposed conductor model 1, and a combined model is obtained after each replacement. The combined model is as follows: Figure 3 and Figure 4 The overall structure of Figure 3 and Figure 4 It can be seen that, in the present invention, each time any cake in the transformer geometric model 5 is replaced by the transposed conductor model 1, the transposed conductor model 1 that replaced the cake last in the transformer geometric model 5 needs to be restored to a cake, that is, in the combined model after each replacement, only one cake is replaced by the transposed conductor model 1; Calculate the electromagnetic loss of the transposed conductor model 1 in the combined model after each replacement, see Figure 5 and Figure 6 ; The electromagnetic loss of the transposed conductor winding is calculated based on the electromagnetic loss of the transposed conductor model 1 in the combined model after each replacement.

[0018] In the above scheme of the present invention, for more accurate calculation, the transposed conductor model 1 in the present invention may adopt a refined model of the transposed conductor, and the refined model of the transposed conductor may adopt a transposed conductor model (i.e., a ring grid model 3) composed of a unit model of the transposed conductor obtained by refined modeling as disclosed in Chinese patent CN118410642A.

[0019] In the above solution of the present invention, when calculating the electromagnetic loss of the entire transposed conductor winding, it is only necessary to superimpose the electromagnetic losses when the transposed conductor model 1 replaces the pancakes at all different positions on the transformer geometric model 3 .

[0020] In the above solution of the present invention, the outer diameter of any pancake coil model 4 in the actual transformer geometric model 5 is the same as that of the transposed conductor model 1 .

[0021] It can be seen from the above scheme that in order to improve the accuracy of the simulation calculation of the electromagnetic loss of the transformer, the patent of the present invention obtains the accurate electromagnetic loss of each pancake winding through a refined modeling of the transposed conductor model, and obtains the electromagnetic loss of the entire winding through step-by-step replacement, thereby improving the accuracy of the electromagnetic loss calculation of the ultra-high voltage transformer.

[0022] Example See also Figure 1-Figure 6 , the electromagnetic loss calculation method of the transposed conductor winding in this embodiment includes the following steps: Step 1, establish the transformer geometric model 5 of the actual transformer core and the refined model of one pancake of the winding (i.e., the transposed conductor model 1 as shown in Figure 2 ); Step 2, take the bottommost pancake of the transformer core geometric model 3 in the transformer geometric model 5 as the first pancake of the winding. Let N be the total number of pancakes of the winding. Count upwards along the core as the second pancake, the third pancake of the winding, until the Nth pancake (in this embodiment, N = 5).

[0023] Step 3, let n = 1, replace the one-pancake coil model 4 of the 1st pancake in the transformer core geometric model 3 with the refined transposed conductor model 1 (as shown in Figure 3 ), after calculating the electromagnetic loss, record the loss value of the transposed conductor model 1.

[0024] Step 4, when n < N, let n = n + 1, and calculate the electromagnetic loss of the transposed conductor model 1 again through Step 3 until n = N, at which point the calculation is completed; Step 5, add up the electromagnetic loss values of the transposed conductor model 1 obtained in Step 3 and Step 4 when it is located in each pancake to obtain the total electromagnetic loss of the entire transposed conductor winding. Among them, Figure 5 is the electromagnetic distribution diagram obtained by replacing the first pancake of the winding with the transposed conductor model, applying the actual current Ia to each wire of the transposed conductor, and applying the actual current Ia to other whole one-pancake wires according to uniform multiple turns; Figure 6 is the electromagnetic distribution diagram obtained by replacing the third pancake of the winding with the transposed conductor model, applying the actual current Ia to each wire of the transposed conductor, and applying the actual current Ia to other whole one-pancake wires according to uniform multiple turns.

[0025] As can be seen from the above solution, the present invention well solves the problem of inaccurate calculation of the winding loss of ultra-high voltage and extra-high voltage transformers, and the problem that since the windings of ultra-high voltage and extra-high voltage transformers usually use transposed conductors, accurate electromagnetic loss results cannot be obtained without using refined modeling. However, the geometric structure of the transposed conductor is complex, and due to the limitation of computer performance, it is impossible to directly perform the modeling of the transposed conductor for the whole winding.

[0026] The present invention also provides a system based on the above-mentioned electromagnetic loss calculation method of the transposed conductor winding. This system includes: Modeling module: used to sequentially replace any pancake in the pre-established actual transformer geometric model 5 with the transposed conductor model 1 until all different positions of the transformer geometric model are replaced with the transposed conductor model, and obtain the combined model after each replacement; First calculation module: used to calculate the electromagnetic loss of the transposed conductor model 1 in the combined model after each replacement; The second calculation module is used to calculate the electromagnetic loss of the transposed conductor winding according to the electromagnetic loss of the transposed conductor model 1 in the combined model after each replacement.

[0027] The embodiments of the present invention also provide corresponding electronic devices and computer-readable storage media for implementing the solutions provided by the embodiments of the present invention.

[0028] The device includes a memory and a processor, the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes, so that the device executes the method for calculating electromagnetic losses of transposed conductor windings described in any embodiment of the present application.

[0029] The storage medium stores a computer program, wherein the computer program, when executed by the processor, implements the method for calculating electromagnetic losses of transposed conductor windings described in any embodiment of the present application.

[0030] A fifth objective of an embodiment of the present invention is to provide a computer program product, wherein the computer program product comprises computer instructions, wherein the computer instructions instruct a computer to execute the method for calculating electromagnetic losses of transposed conductor windings.

[0031] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0032] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0033] The present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, readable storage media, optical storage, etc.) containing computer-usable program codes.

[0034] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] 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 above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for calculating electromagnetic loss of transposed conductor windings, characterized in that: The process includes the following: Substituting any one of the pies in the pre-established actual transformer geometric model (5) with the transposed conductor model (1) in sequence, until all the pies at different positions on the transformer geometric model (5) are replaced by the transposed conductor model (1), and a combined model after each replacement is obtained; Calculate the electromagnetic loss of the transposed conductor model (1) in the combined model after each replacement; The electromagnetic loss of the transposed conductor winding is calculated based on the electromagnetic loss of the transposed conductor model (1) in the combined model after each replacement.

2. A method for calculating electromagnetic loss of transposed conductor windings according to claim 1, characterized in that: Transposed conductor model (1) A refined model of transposed conductor is adopted.

3. The method for calculating electromagnetic loss of transposed conductor winding according to claim 1, characterized in that: Any cake in the pre-established actual transformer geometric model (5) is replaced with the transposed conductor model (1) in sequence, until the transposed conductor model (1) is used to replace all cakes in different positions on the transformer geometric model (5), and the combined model obtained after each replacement includes: replacing the cakes in the transformer geometric model (5) from the bottom to the top of the transformer core geometric model (3) in the transformer geometric model (5), or replacing the cakes in the transformer geometric model (5) from the top to the bottom of the transformer core geometric model (3) in the transformer geometric model (5).

4. The method for calculating electromagnetic loss of transposed conductor winding according to claim 1, characterized in that: The electromagnetic loss of the transposed conductor model (1) in the combined model after each replacement is superimposed to obtain the electromagnetic loss of the transposed conductor winding.

5. The method for calculating electromagnetic loss of transposed conductor winding according to claim 1, characterized in that: The outer diameter of the coil model (4) of any pan in the actual transformer geometric model (5) is the same as that of the transposed conductor model (1).

6. A transposed conductor winding electromagnetic loss calculation system, characterized in that: include: Modeling module: used to replace any one of the pre-established actual transformer geometric model (5) with the transposed conductor model (1) in turn, until all the pies at different positions on the transformer geometric model (5) are replaced by the transposed conductor model (1), thereby obtaining a combined model after each replacement; The first calculation module is used to calculate the electromagnetic loss of the transposed conductor model (1) in the combined model after each replacement; The second calculation module is used to calculate the electromagnetic loss of the transposed conductor winding according to the electromagnetic loss of the transposed conductor model (1) in the combined model after each replacement.

7. An electronic device, characterized in that: include: one or more processors; a storage device having one or more programs stored thereon; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for calculating electromagnetic losses of transposed conductor windings according to any one of claims 1 to 5.

8. A storage medium, characterized in that: A computer program is stored thereon, wherein when the computer program is executed by a processor, the method for calculating electromagnetic losses of a transposed conductor winding according to any one of claims 1 to 5 is implemented.

9. A computer program product, comprising computer instructions, characterized in that: The computer instructions instruct the computer to execute the method for calculating electromagnetic losses of transposed conductor windings according to any one of claims 1 to 5.

Images