Parametric modeling method, device and computer equipment for inner screen transformer winding

Abstract

The application relates to a parameterized modeling method, device and computer equipment for an inner-screen transformer winding. The method comprises the following steps: obtaining initialization parameters of a pie-shaped winding; sequentially connecting main lines according to main line numbers; connecting screen lines according to screen line numbers; determining and correcting the motion trajectory of a wire turn in a wire pie based on a coordinate self-defined rule; generating a three-dimensional wire turn entity by sweeping along the motion trajectory of the wire turn based on the cross section of the wire; correcting the start and end radian of the wire turn wound by the wire pie based on the number of back steps generated when the motion trajectory is corrected; correcting the longitudinal coordinate of the wire turn wound by the wire pie; respectively connecting the heads of the main lines and the screen lines between the positive pie and the negative pie, sweeping along the motion trajectory of the connecting line based on the cross section of the connecting line, integrating the sweeping result and the three-dimensional wire turn entity, and obtaining a three-dimensional entity of a double-wire pie. The method can efficiently and accurately complete the parameterized modeling of the inner-screen transformer winding.

Description

Technical Field

[0001] This application relates to the field of digital design and simulation technology for power equipment, and in particular to a parametric modeling method, device and computer equipment for an internal shielded transformer winding. Background Technology

[0002] As a core piece of equipment in the power system, the performance of power transformers directly affects the safety and stability of the power grid. In the planning, fault handling, and equipment optimization of power systems, the analysis of the electromagnetic characteristics, mechanical deformation, and thermal effects of the shielded windings of power transformers all rely on high-precision simulation models.

[0003] In traditional technology, there are three types of modeling methods for inner-shielded transformer windings. The first type involves measuring the actual geometric parameters of the windings and combining them with computer-aided design to construct a three-dimensional solid model. The second type uses lumped parameter models or distributed parameter models and obtains parameters by fitting frequency response analysis curves with experimental data or optimization algorithms. The third type utilizes WPF technology to achieve non-destructive visualization of the winding structure.

[0004] However, current modeling methods focus on the overall geometric parameters of the winding, lacking parameterized descriptions of key characteristics such as the distribution of shielding turns and rollback corrections. This results in incomplete model structure descriptions, low modeling efficiency, insufficient high-frequency adaptability, and weak parameter interpretability. Summary of the Invention

[0005] Therefore, it is necessary to provide a parametric modeling method, device, and computer equipment for inner-screen transformer windings that can fully express the modeling process and improve modeling efficiency, in order to address the above-mentioned technical problems.

[0006] Firstly, this application provides a parametric modeling method for inner-shielded transformer windings, including:

[0007] Obtain the initialization parameters of the disc winding, including the main wire number and the screen wire number;

[0008] The number of main wires wound together is taken as the number of main wire sets within the wire cake. For the Nth set of main wires, the main wire numbered N and the main wires whose numbers are separated from the numbers of the preceding main wires by the number of main wire sets are connected in sequence. The screen wires are connected in sequence according to their numbers. Based on the connected main wires and screen wires, the wire turn model of the inner screen wire cake is obtained.

[0009] Based on the custom coordinate rules, the motion trajectory of the coil in the inner screen-type pie is determined and the motion trajectory is corrected.

[0010] Based on the radial width and axial height of the conductor used for the coil, the cross-section of the conductor is determined; based on the cross-section, a sweep is performed along the movement trajectory of the coil to generate a three-dimensional coil entity.

[0011] Based on the number of retractions generated during the correction of the motion trajectory, the starting arc and / or ending arc of the coil wound by the coil are corrected; the ordinate of the coil wound by the coil is corrected.

[0012] The main line and screen line are connected to the positive and negative pie respectively. Based on the cross-section of the conductor used for the connection, the motion trajectory of the connection line is swept. The sweeping result is integrated with the three-dimensional line turn entity to obtain the three-dimensional entity of the double pie.

[0013] In one embodiment, the initialization parameters further include unit radians; obtaining the initialization parameters of the disc winding includes:

[0014] The circumference of the corresponding turns of the disc winding is divided into multiple arcs, each arc is taken as a unit arc, and each unit arc corresponds to a unit position.

[0015] Number the main lines and screen lines of the reverse pie from the outside to the inside of the inner screen pie to obtain the main line number and screen line number of the reverse pie; number the main lines and screen lines of the positive pie from the inside to the outside of the inner screen pie to obtain the main line number and screen line number of the positive pie.

[0016] Starting from the inner diameter of the coil, the radial width of the material in the coil arrangement sequence is superimposed to obtain the starting winding point radius of the coil in the radial direction.

[0017] In one embodiment, the coordinate customization rules include setting the starting winding position of the first coil in the reverse disc to the first position, setting the interval between the starting winding positions of adjacent parallel main lines to the first position, connecting adjacent coils of the same set of main lines end to end, setting each coil to full-turn winding, and setting the same coil to no displacement in the axial direction.

[0018] Based on custom coordinate rules, the motion trajectory of the coils in the coil pie is determined, including:

[0019] The radial offset of the main line is obtained by superimposing the radial widths of each layer of material it passes through in the radial direction; the radial offset of the screen line is obtained by superimposing the radial widths of each layer of material it passes through in the radial direction.

[0020] The motion trajectory of the coil in the coil is determined based on the radial offset of the main line, the radial offset of the screen line, the radius of the starting winding point of the coil in the coil disc in the radial direction, and the unit radian.

[0021] In one embodiment, the motion trajectory is corrected, including:

[0022] Obtain the first product between the total number of turns to be reversed and the unit radian, and get the reversal radian. Reverse the terminating radian of the last turn of the main line to the reversal radian to correct the movement trajectory of the main line turns.

[0023] When the number of turns of the screen wire is a full integer, the termination arc of the last turn of the screen wire is not corrected. When the number of turns of the screen wire is not a full integer, the difference in turns between the number of turns of the screen wire and the full integer number of turns rounded up is obtained. The difference in turns is converted into a difference range number. The second product between the result of rounding up the difference range number and the unit arc is obtained. The termination arc of the last turn of the screen wire is returned to the corresponding arc of the second product to correct the movement trajectory of the screen wire turns.

[0024] In one embodiment, the starting and / or ending arc of the coil wound on the coil is corrected based on the number of retractions generated during the correction of the motion trajectory, including:

[0025] When there is a rollback in the reversed coil, the rollback number corresponding to the rollback of the last turn of the reversed coil is multiplied by the unit arc to obtain the third product; based on the third product, the starting arc and / or ending arc of each turn of the forward coil are corrected.

[0026] In one embodiment, the main line and screen line are respectively connected between the positive and negative pie charts, including:

[0027] Based on the way the main lines are interchanged between the positive and negative pie charts, an arc is used to connect the end point of the last set of main lines in the negative pie chart to the beginning point of the first set of main lines in the positive pie chart.

[0028] Using the starting position of the first coil of the screen wire wound in the reverse disc as the position reference, the starting point of the first coil of the screen wire wound in the reverse disc is connected to the ending point of the outermost coil of the screen wire wound in the positive disc through an arc.

[0029] In one embodiment, for two adjacent sets of double-line disc three-dimensional entities, the number of arcs that the last turn of the positive disc in the previous set of double-line disc three-dimensional entities retracts is multiplied by the number of arcs that the last turn of the positive disc in the previous set of double-line disc three-dimensional entities retracts by the number of arcs that the fourth product is obtained; based on the fourth product, the starting arc and ending arc of each turn of the reverse disc in the next set of double-line disc three-dimensional entities are corrected.

[0030] Based on the ordinate of the coils wound in the previous set of double-coil three-dimensional entities and the axial spacing between two adjacent sets of double-coil three-dimensional entities, the ordinate of the coils wound in the next set of double-coil three-dimensional entities is corrected.

[0031] Based on the main line transposition method between the positive cake in the previous set of double-lined 3D entities and the negative cake in the next set of double-lined 3D entities, the starting point of the first set of main lines in the negative cake in the next set of double-lined 3D entities is connected to the ending point of the last set of main lines in the positive cake in the previous set of double-lined 3D entities by an arc.

[0032] Using the starting position of the first coil of the screen line in the reverse pancake of the next set of double-pancake three-dimensional entities as the position reference, the starting point of the first coil of the screen line in the reverse pancake of the next set of double-pancake three-dimensional entities is connected to the ending point of the outermost coil of the screen line in the positive pancake of the previous set of double-pancake three-dimensional entities through an arc.

[0033] For the arc connecting two adjacent sets of double-line disc 3D entities, the cross-section of the conductor is determined according to the radial width and axial height of the conductor used for the arc. Based on the cross-section, a sweep is performed along the motion trajectory of the arc. The sweep result is compared with multiple double-line disc 3D entities to obtain a single-coil 3D entity.

[0034] In one embodiment, the origin of a three-dimensional rectangular coordinate system is determined, and based on the origin, the position of the point on the turn in the three-dimensional entity of a single coil is changed to be represented using three-dimensional rectangular coordinates;

[0035] Based on transformer design parameters, at least two single-coil three-dimensional entities are spatially located; wherein, the conditions for spatial location are that coils on different voltage sides of the same phase share the same center, and the center distance between coils that are not in the same phase is equal to the spacing between the main columns of the transformer core.

[0036] After spatial positioning is completed, the single-coil 3D entity is merged to obtain a multi-coil 3D entity.

[0037] Secondly, this application also provides a parametric modeling device for an inner-shielded transformer winding, comprising:

[0038] The acquisition module is used to acquire the initialization parameters of the disc winding, including the main wire number and the screen wire number.

[0039] The connection module is used to take the number of main wires wound as the number of main wire sets in the wire cake. For the Nth set of main wires, the main wire numbered N and the main wires whose numbers are separated from the numbers of the preceding main wires by the number of main wire sets are connected in sequence. The screen wires are connected in sequence according to the screen wire numbers. Based on the connected main wires and screen wires, the wire turn model of the inner screen wire cake is obtained.

[0040] The correction module is used to determine the motion trajectory of the coil in the inner screen-type pie based on the coordinate-defined rules, and to correct the motion trajectory.

[0041] The correction module is also used to correct the starting arc and / or ending arc of the coil wound by the coil based on the number of retractions generated when correcting the motion trajectory; and to correct the ordinate of the coil wound by the coil.

[0042] The sweep module is used to determine the cross-section of the conductor based on the radial width and axial height of the conductor used in the coil; based on the cross-section, it sweeps along the movement trajectory of the coil to generate a three-dimensional coil entity.

[0043] The sweeping module is also used to make lead-out connections of the main line and screen line between the positive and negative pie, respectively. Based on the cross-section of the conductor used for the lead-out connection, it sweeps along the movement trajectory of the lead-out connection line and integrates the sweeping results with the three-dimensional line turn entity to obtain the three-dimensional entity of the double-line pie.

[0044] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0045] Obtain the initialization parameters of the disc winding, including the main wire number and the screen wire number;

[0046] The number of main wires wound together is taken as the number of main wire sets within the wire cake. For the Nth set of main wires, the main wire numbered N and the main wires whose numbers are separated from the numbers of the preceding main wires by the number of main wire sets are connected in sequence. The screen wires are connected in sequence according to their numbers. Based on the connected main wires and screen wires, the wire turn model of the inner screen wire cake is obtained.

[0047] Based on the custom coordinate rules, the motion trajectory of the coil in the inner screen-type pie is determined and the motion trajectory is corrected.

[0048] Based on the radial width and axial height of the conductor used for the coil, the cross-section of the conductor is determined; based on the cross-section, a sweep is performed along the movement trajectory of the coil to generate a three-dimensional coil entity.

[0049] Based on the number of retractions generated during the correction of the motion trajectory, the starting arc and / or ending arc of the coil wound by the coil are corrected; the ordinate of the coil wound by the coil is corrected.

[0050] The main line and screen line are connected to the positive and negative pie respectively. Based on the cross-section of the conductor used for the connection, the motion trajectory of the connection line is swept. The sweeping result is integrated with the three-dimensional line turn entity to obtain the three-dimensional entity of the double pie.

[0051] The parametric modeling method, apparatus, and computer equipment for the aforementioned inner-screen transformer windings obtain initialization parameters for the pancake winding, including main line numbers and screen line numbers. The number of parallel main line windings is used as the number of main line sets within the pancake. For the Nth set of main lines, the main line numbered N, and the main lines whose numbers are spaced apart from the preceding main line numbers by the number of main line sets, are sequentially connected. Screen lines are then sequentially connected according to their screen line numbers. Based on the connected main lines and screen lines, a pancake-shaped turn model is obtained. The motion trajectory of the turns within the inner-screen pancake is determined based on custom coordinate rules, and the motion trajectory is corrected. Based on the radial width and axial height of the conductors used for the corresponding coils, the cross-section of the conductors is determined. Based on the cross-section, a sweep is performed along the movement trajectory of the coils to generate a three-dimensional coil entity. Based on the number of retractions generated during the correction of the movement trajectory, the starting arc and / or ending arc of the coils wound on the coil disc are corrected. The ordinate of the coils wound on the coil disc is corrected. Main wire and screen wire leads are connected between the positive and negative coils respectively. Based on the cross-section of the conductors used for the lead-out connections, a sweep is performed along the movement trajectory of the lead-out connection lines. The sweep results are integrated with the three-dimensional coil entity to obtain a double-coil three-dimensional entity. The above process of obtaining the double-coil three-dimensional entity fully considers the complex structure of the transformer inner-screen winding from the coil level to the coil level. By obtaining the initialization parameters of the inner-screen winding, the connection method of the main wire and screen wire within the coil disc is determined according to the main wire number and screen wire number. The movement trajectory of the coils in the coil disc is corrected, making the constructed inner-screen coil entity model more accurate, reliable, and more interpretable. Furthermore, based on the arc connection method of the main line and screen line between the coils and the corrected coil model coordinates, a three-dimensional solid of the double coil is obtained. The above scheme refines the model of the inner-screen transformer winding down to the coil-turn level, making the model adaptable to high frequencies, improving its practicality, and achieving efficient and accurate complete parametric modeling of the inner-screen transformer winding. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a diagram illustrating the application environment of a parametric modeling method for an inner-screen transformer winding in one embodiment.

[0054] Figure 2 This is a flowchart illustrating a parametric modeling method for an inner-screen transformer winding in one embodiment.

[0055] Figure 3 This is a given form of the arrangement order of the lines within the space in one embodiment;

[0056] Figure 4 This is a schematic diagram of the inter-panel connection method when the wire transposition method is 1 in one embodiment;

[0057] Figure 5 This is a schematic diagram of the inter-panel connection method when the wire transposition method is 2 in one embodiment;

[0058] Figure 6 This is a schematic diagram of the inter-panel connection method when the wire transposition method and the number of wires are the same in one embodiment;

[0059] Figure 7 This is a flowchart illustrating the parametric modeling method for the inner-screen transformer winding in another embodiment;

[0060] Figure 8 This is an example diagram showing the arrangement order and wire numbering within the inner screen-type inverted disc space in one embodiment;

[0061] Figure 9 This is an example diagram showing the arrangement order and wire numbering within the inner screen-type pie space in one embodiment;

[0062] Figure 10 A structural block diagram of a parametric modeling device for an inner-screen transformer winding in one embodiment;

[0063] Figure 11 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0065] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0066] The parametric modeling method for inner-shielded transformer windings provided in this application embodiment can be applied to, for example... Figure 1In the application environment shown, terminal 102 communicates with server 104 via a network. A data storage system can store the data that server 104 needs to process. The data storage system can be integrated onto server 104 or located on a cloud or other network server. Specifically, terminal 102 or server 104 completes a parametric modeling method for an inner-screen transformer winding, which includes:

[0067] Obtain the initialization parameters of the disc winding, including the main wire number and the screen wire number;

[0068] The number of main wires wound together is taken as the number of main wire sets within the wire cake. For the Nth set of main wires, the main wire numbered N and the main wires whose numbers are separated from the numbers of the preceding main wires by the number of main wire sets are connected in sequence. The screen wires are connected in sequence according to their numbers. Based on the connected main wires and screen wires, the wire turn model of the inner screen wire cake is obtained.

[0069] Based on the custom coordinate rules, the motion trajectory of the coil in the inner screen-type pie is determined and the motion trajectory is corrected.

[0070] Based on the radial width and axial height of the conductor used for the coil, the cross-section of the conductor is determined; based on the cross-section, a sweep is performed along the movement trajectory of the coil to generate a three-dimensional coil entity.

[0071] Based on the number of retractions generated during the correction of the motion trajectory, the starting arc and / or ending arc of the coil wound by the coil are corrected; the ordinate of the coil wound by the coil is corrected.

[0072] The main line and screen line are connected to the positive and negative pie respectively. Based on the cross-section of the conductor used for the connection, the motion trajectory of the connection line is swept. The sweeping result is integrated with the three-dimensional line turn entity to obtain the three-dimensional entity of the double pie.

[0073] Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, drones, low-altitude aircraft, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, and projection equipment. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted displays. Head-mounted displays can be virtual reality (VR) devices, augmented reality (AR) devices, and smart glasses. Server 104 can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0074] In one exemplary embodiment, such as Figure 2As shown, a parametric modeling method for inner-shielded transformer windings is provided, which is then applied to... Figure 1 Taking the terminal in the example, the explanation includes the following steps 202 to 212. Wherein:

[0075] Step 202: Obtain the initialization parameters of the disc winding. The initialization parameters include the main wire number and the screen wire number.

[0076] In this context, a disc winding refers to winding the main wire one turn after another to form a disc. The number of turns in the disc is determined by the number of turns wound. The discs are then stacked along the axial direction of the transformer core column, with arcs connecting the discs. The shielding wire is placed between any two turns of the main wire on the disc according to certain rules, and the shielding wires on the discs are connected by arcs, thus obtaining an inner-shielded winding.

[0077] For example, the main lines and screen lines of each pie are numbered separately. Specifically, the main lines of each pie are numbered from 1 to the number of turns of the main line in the current pie. For a reverse pie, the main line number is defined from the outermost turn to the innermost turn; for a normal pie, the main line number is defined from the innermost turn to the outermost turn. The screen lines of each pie are also numbered from 1 to the number of turns of the screen line in the current pie. For a reverse pie, the screen line number is defined from the outermost turn to the innermost turn; for a normal pie, the screen line number is defined from the innermost turn to the outermost turn.

[0078] For example, the centers of the multiple turns that make up the coil are the same, and the radius of the starting winding point of the coil in the radial direction is determined according to the position of the center and the starting turn of the coil.

[0079] Step 204: Take the number of main wires wound as the number of main wire sets in the wire cake. For the Nth set of main wires, connect the main wire numbered N and the main wires whose numbers are spaced apart from the numbers of the preceding main wires as the number of main wire sets in sequence. Connect the screen wires in sequence according to the screen wire numbers. Based on the connected main wires and screen wires, obtain the wire turn model of the inner screen wire cake.

[0080] For example, the yarn disc is composed of multiple main strands wound in parallel, depending on the number of main strands wound in parallel. The total number of turns of the coil is determined by the number of turns wound on each main wire. , and wrap the main line around several As the number of main lines within the line pie, for the Nth main line, the main line numbered N is combined with the main line numbered... The main lines are connected sequentially.

[0081] There are no parallel windings among the screen lines in the coil. The screen lines within each individual coil are connected sequentially according to their numbers. Based on the connected main lines and screen lines, the coil model of the inner screen coil is obtained.

[0082] Step 206: Based on the coordinate custom rules, determine the motion trajectory of the coil in the inner screen-type coil and correct the motion trajectory.

[0083] For example, cylindrical coordinates are used as a method of describing the start and end coordinates of the main line and screen line in the line disc, including the radians corresponding to the start and end positions. and the distance between the starting and ending positions and the center of the circle. .

[0084] Specifically, the correction of the motion trajectory includes based on Correct the starting position of the main wire and screen wire in the winding disc; determine the radial offset of the starting and ending coordinates of each turn of the main wire and screen wire in the winding disc according to the connection scheme and material type of the main wire and screen wire, and then correct the starting and ending coordinates of each turn of the main wire and screen wire in the winding disc; correct the ending point coordinates of the last turn of each set of main wires according to the number of unwinding.

[0085] Among them, the number of gears to be removed refers to the difference between the number of gears at the end of a full turn and the number of gears at the end point of the last turn when the last turn of each main line is not a full turn.

[0086] Step 208: Determine the cross-section of the conductor based on the radial width and axial height of the conductor used for the coil; based on the cross-section, sweep along the movement trajectory of the coil to generate a three-dimensional coil entity.

[0087] For example, the radial width and axial height of the conductor are determined according to the conductor materials used for the main line and the screen line turns, thereby determining the cross-section of the conductor. Based on the cross-section, a three-dimensional turn entity is constructed along the two-dimensional motion trajectory of the turn, thereby obtaining the three-dimensional entity of the turn disc.

[0088] Step 210: Based on the number of retractions generated during the correction of the motion trajectory, correct the starting arc and / or ending arc of the coil wound by the coil; correct the ordinate of the coil wound by the coil.

[0089] For example, the pancake winding of a transformer consists of at least one coil, which in turn consists of at least one double-coil pancake, which is composed of a positive pancake and a negative pancake. When the number of turns unwinding the first pancake of a coil is not zero, the radian coordinates of the start and end points of all main wires and plate wire turns of the second pancake of that coil are... All of these need to be corrected.

[0090] For example, the ordinates of the start and end points of the positive and negative discs of the coil are... When both are 0, i.e., when the two discs are at the same vertical height, the distance between the discs is determined by... The ordinates of the starting and ending points of all main lines and screen lines in the pie chart model. Make corrections.

[0091] Step 212: Connect the main line and screen line to the positive and negative pie respectively. Based on the cross-section of the conductor used for the connection, sweep along the movement trajectory of the connection line. Integrate the sweeping result with the three-dimensional line coil entity to obtain the three-dimensional entity of the double-line pie.

[0092] For example, according to the conductor transposition method, the coordinates of the last group of parallel-wound main wire termination point of the first coil of the coil and the coordinates of the first group of parallel-wound main wire starting point of the second coil of the coil are connected using an arc-shaped coil model. Here, the last group of parallel-wound main wire refers to the last turn of all parallel-wound main wires in the coil, and the first group of parallel-wound main wires refers to the first turn of all parallel-wound main wires in the coil.

[0093] For example, taking the start or end position of the outermost turn of the screen line of the first coil as a reference, the coordinates of the start or end point of the screen line of the outermost turn of the first coil and the coordinates of the start or end point of the screen line of the outermost turn of the second coil are connected by the arc-shaped coil model.

[0094] For example, the cross-section of the connecting line is determined based on the radial width and axial height of the main connecting line and the screen connecting line between the positive and negative pie. Based on the cross-section, a three-dimensional connecting line entity is constructed along the two-dimensional motion trajectory of the connecting line, and integrated with the three-dimensional coil entity to obtain a two-dimensional pie entity.

[0095] In the parametric modeling method for the inner-screen transformer winding described above, the initialization parameters of the pancake winding are obtained, including the main line number and the screen line number. The number of parallel main lines is used as the number of main line sets within the pancake. For the Nth set of main lines, the main line numbered N and the main lines whose numbers are spaced apart from the preceding main lines by the number of main line sets are connected sequentially. The screen lines are connected sequentially according to their numbers. Based on the connected main lines and screen lines, the turn model of the inner-screen pancake is obtained. Based on the custom coordinate rules, the motion trajectory of the turns in the inner-screen pancake is determined and corrected. Based on the turns... The cross-section of the conductor is determined by the radial width and axial height of the conductor. Based on the cross-section, a sweep is performed along the movement trajectory of the coil to generate a three-dimensional coil entity. The starting and / or ending arcs of the coils wound on the coil disc are corrected based on the number of retractions generated during trajectory correction. The ordinate of the coils wound on the coil disc is also corrected. Lead-out connections of the main line and screen line are made between the positive and negative coils respectively. Based on the cross-section of the conductor used for the lead-out connection, a sweep is performed along the movement trajectory of the lead-out connection line. The sweep results are integrated with the three-dimensional coil entity to obtain a double-coil three-dimensional entity. The above process of obtaining the double-coil three-dimensional entity comprehensively considers the complex structure of the transformer's inner-screen winding from the coil level to the coil level. By obtaining the initialization parameters of the inner-screen winding, the connection method of the main line and screen line within the coil disc is determined according to the main line number and screen line number. The movement trajectory of the coils in the coil disc is corrected, making the constructed inner-screen coil entity model more accurate, reliable, and more interpretable. Furthermore, based on the arc connection method of the main line and screen line between the coils and the corrected coil model coordinates, a three-dimensional solid of the double coil is obtained. The above scheme refines the model of the inner-screen transformer winding down to the coil-turn level, making the model adaptable to high frequencies, improving its practicality, and achieving efficient and accurate complete parametric modeling of the inner-screen transformer winding.

[0096] In one embodiment, the initialization parameters further include unit radians; obtaining the initialization parameters of the disc winding includes: dividing the corresponding circumference of the disc winding turns into multiple radians, taking each radian as a unit radian and each unit radian corresponding to a unit position; numbering the main wire and screen wire of the reverse disc from the outside to the inside of the inner screen disc to obtain the main wire number and screen wire number of the reverse disc; numbering the main wire and screen wire of the positive disc from the inside to the outside of the inner screen disc to obtain the main wire number and screen wire number of the positive disc; starting from the inner diameter of the disc, superimposing the material width in the disc arrangement sequence to obtain the radial starting point radius of the turns in the disc.

[0097] For example, during the manufacturing process of the disc winding, based on the state of the coils of the disc winding, and since the coils are circumferential, support bars are used to divide the circumference into equal segments, with each segment corresponding to a certain arc. That is, the unit is radians. Each setting corresponds to radians. The calculation formula is:

[0098]

[0099] For example, the transformer's inner-shielded winding is constructed by alternating stacks of multiple positive and negative coils, with shielding wires placed between the main wires of the coils. The parameters of both the positive and negative coils—including the number of turns, the inner-shielded winding code, the arrangement order within the coil space, the radial and axial dimensions of each main wire and shielding wire in the coil, and the inner and outer radii of the coil—are obtained simultaneously. The inner-shielded winding code includes the transposition method of each main wire in the coil, the number of turns of the parallel-wound main wire, the number of parallel-wound main wires, the number of coils shorted by the shielding wire, and the number of turns of the shielding wire.

[0100] Furthermore, the arrangement order within the space of the line disc is as follows: Figure 3 The table shows the given format. Each cell code represents a type of material, and the table from left to right corresponds to the material arrangement of the coil from the inside out. The first character of each cell code indicates the material type: main line (w), screen line (s), shaft oil channel (c), and filler (f). The second character of each cell code indicates the subclass of that material, such as type 1 main line (w1) and type 1 screen line (s1). (The table is then provided...) Figure 3 Based on this, the radial and axial dimensions of the corresponding material, as well as the material parameters, should also be provided. Material parameters include relative permittivity, relative permeability, and electrical conductivity. The arrangement order within each disc space should correspond one-to-one with the parameters of the corresponding material, as shown in the example table in Table 1.

[0101] For example, the type of coil is identified by its inner-screen winding code. The inner-screen winding code consists of 5 numbers, 3 symbols, and 1 letter, and can be represented as follows:

[0102]

[0103] in, , , , , The five numbers representing the inner-screen coil winding code, " " "Three symbols representing the inner screen type coil winding code, This is a single letter representing the code for inner-screen coil winding.

[0104] Specifically, The numbers represent the main line transposition method. If all numbers are transposed, then... Equal to the number of turns; The number of turns for the main wire; The main line is wrapped around the number of loops; The number of short circuits for the screen cable, if A value of 2 indicates that two consecutive screen lines are short-circuited (i.e., screen lines 1 and 2 are short-circuited). If the value is 4, it means that the screen lines of two pieces are shorted (i.e., the screen lines of pieces 1 and 4 are shorted). This indicates the number of screen cable turns. (Letter) The representative line pattern is the inner screen type line pattern; Equal to the total number of turns of the main wire in the coil; The symbol “” is a pre-defined symbol and has no real meaning.

[0105] Table 1

[0106]

[0107] For example, the coils of the coil are concentric, dividing the circumference into multiple arcs, and each arc is used as a unit arc and corresponds to a unit level, thereby obtaining the number of levels and the arc corresponding to each level. For each pie, the main line turns and screen line turns are numbered separately. The main line turns can be numbered using numbers 1, 2, 3, etc., and the screen line turns can be numbered using numbers ①, ②, ③, etc. The main line turns and screen line turns of the reverse pie are numbered from the outside to the inside; the main line turns and screen line turns of the positive pie are numbered from the inside to the outside.

[0108] For example, starting from the inner diameter of the coil, the radial radius of the starting winding point of each coil in the coil is obtained according to the arrangement order within the coil space and the width of each coil material. Here, the inner diameter of the coil is the distance from the center to the starting or ending winding point of the innermost coil.

[0109] In this embodiment, by calculating the radian corresponding to each level, defining the numbers of the main line and the screen line respectively, and obtaining the starting winding point radius of the coil according to the arrangement order in the coil space, the coil level structure of the transformer inner screen winding can be simulated in a refined manner, thereby providing accurate and reliable data support for the subsequent inner screen winding, and thus improving the accuracy of parametric modeling of the transformer inner screen winding.

[0110] In one embodiment, the coordinate customization rules include setting the starting winding position of the first coil in the reverse pancake to the first setting, setting the interval between the starting winding positions of adjacent parallel main lines to the first setting, connecting adjacent coils of the same main line end-to-end, setting each coil to full-turn winding, and setting the same coil to no displacement in the axial direction. Based on the coordinate customization rules, the motion trajectory of the coil in the pancake is determined, including: superimposing the radial width of each layer of material that the main line passes through in the radial direction to obtain the radial offset of the main line; superimposing the radial width of each layer of material that the screen line passes through in the radial direction to obtain the radial offset of the screen line; and determining the motion trajectory of the coil in the pancake based on the radial offset of the main line, the radial offset of the screen line, the radius of the starting winding point of the coil in the radial direction, and the unit radian.

[0111] For example, the coil is composed of multiple main wires wound in parallel. The starting winding position of the first turn of the first main wire in the coil is set to position 1, and the interval between the starting winding positions of adjacent parallel main wires is set to position 1. Specifically, the starting winding position of the first turn of the second main wire adjacent to the first main wire is set to position 2, and the starting winding positions of the other parallel main wires are set sequentially.

[0112] For example, when a screen wire is set in a pie chart, the starting winding position of the first turn of the screen wire is set according to the positional relationship between the screen wire and multiple main wires, and the starting winding position of the first turn of the adjacent main wire. Specifically, when the screen wire is located between the first and second main wires, the starting winding position of the first turn of the screen wire is set to position 2, the starting winding position of the first turn of the second main wire is set to position 3, and so on for the other parallel main wires.

[0113] For example, each wire turn is set to full-turn winding, and the same wire turn is set to no displacement in the axial direction, based on the number of parallel windings of the main wire. The total number of turns of the coil is determined by the number of turns wound on each main wire. , and wrap the main line around several As the number of main lines within the line cake, adjacent turns of the same main line are connected end to end, and the connection scheme is shown in Table 2.

[0114] Table 2

[0115]

[0116] For example, the offset of each turn of the main line or screen line is determined based on the spatial arrangement order within the coil and the radial width of each material in the coil. Specifically, the radial offset of the main line is obtained by superimposing the radial widths of each layer of material that the main line passes through in the radial direction. That is, when the main line is numbered X, there are multiple turns between this main line and the main line numbered 1. The radial widths of these multiple turns are superimposed to obtain the radial offset of the main line numbered X. Similarly, the radial offset of the screen line is obtained by superimposing the radial widths of each layer of material that the screen line passes through in the radial direction. That is, when the screen line is numbered Y, there are multiple turns between this screen line and the main line numbered 1. The radial widths of these multiple turns are superimposed to obtain the radial offset of the screen line numbered Y. Then, based on the radial offset of the main line, the radial offset of the screen line, the radius of the starting winding point of the coil in the coil in the radial direction, and the unit radian, the movement trajectory of the coil in the coil is determined.

[0117] In this embodiment, by defining coordinate rules and determining the motion trajectory of the coils in the coil pie based on the custom coordinate rules, the accuracy of each coil model in the coil pie can be improved, thereby enhancing the accuracy and reliability of the entire modeling process.

[0118] In one embodiment, correcting the motion trajectory includes: obtaining a first product between the total number of turns to be reversed and the unit radian to obtain the reversal radian; reversing the terminating radian of the last turn wound by the main line back to the reversal radian to correct the motion trajectory of the main line turn; if the number of turns wound by the screen line is a full integer, not correcting the terminating radian of the last turn wound by the screen line; if the number of turns wound by the screen line is not a full integer, obtaining the difference in turns between the number of turns wound by the screen line and the full integer number of turns obtained by rounding up the number of turns wound by the screen line, converting the difference in turns into a difference number of turns, obtaining a second product between the result of rounding up the difference number of turns and the unit radian; reversing the terminating radian of the last turn wound by the screen line back to the radian corresponding to the second product to correct the motion trajectory of the screen line turn.

[0119] For example, when the last turn of each main line is not a full turn, the trajectory of the turn is corrected. Based on the number of turns removed, the radian coordinates of the termination point of the last turn of each main line are corrected. Specifically, it is expressed as:

[0120]

[0121] in, , These are the radian coordinates of the termination point of the last turn of each main line before and after the correction. For each gear, the corresponding radian. This represents the number of files rejected.

[0122] For example, the radian coordinates of the termination point of the last turn of the screen cable are corrected according to the number of turns of the screen cable. There is no parallel winding of the screen wires; each screen wire in each coil is wound with a single shield wire. When the number of turns of the screen wire is a full integer, the termination arc of the last turn is not corrected; when the number of turns is not a full integer, the termination arc of the last turn is corrected, specifically as follows:

[0123]

[0124] in, and These are the radian coordinates of the screen line termination point before and after correction. For each gear, the corresponding radian. This refers to the number of pins for the last coil of the screen cable. The number of screen wire turns. This is to round X up.

[0125] In this embodiment, the termination coordinates of the last turn of the main line and screen line in the wire disc are corrected by the number of gears, the radian corresponding to each gear, and the number of gears to be degraded. This can accurately simulate the position of each turn of the positive and negative discs in the winding of the inner screen transformer, thereby improving the accuracy and reliability of the wire disc model.

[0126] In one embodiment, the starting arc and / or ending arc of the coil wound by the coil disc are corrected based on the number of retractions generated when correcting the motion trajectory. This includes: when there is retraction in the reverse coil, multiplying the number of retractions corresponding to the arc retraction of the last coil wound by the reverse coil by a unit arc to obtain a third product; and correcting the starting arc and / or ending arc of each coil wound by the positive coil according to the third product.

[0127] For example, a set of double-line discs consists of two discs, a positive disc and a negative disc, connected together. If the first disc in the set is a negative disc, the second disc is a positive disc, and the positive and negative discs are connected by an arc. When the retraction number of the negative disc is not zero, the radian coordinates of the start and end points of all main lines and screen lines in the positive disc are... All need to be corrected, which can be expressed as:

[0128]

[0129] in, and These are the radian coordinates of the starting and ending points of all main lines and screen lines in the positive pie chart before and after the correction. For each gear, the corresponding radian. This is the number of times the cake is reversed.

[0130] In this embodiment, by correcting the starting and ending arc coordinates of each turn of the winding of the positive plate by adjusting the number of retractions of the reverse plate, the effect of fine simulation of the structure of each plate of the inner-screen transformer winding can be achieved, thus improving the accuracy of parametric modeling of the inner-screen transformer winding.

[0131] In one embodiment, the connection of the main line and screen line between the positive and negative discs includes: according to the main line transposition method between the positive and negative discs, connecting the end point of the last group of main lines in the negative disc to the starting point of the first group of main lines in the positive disc via an arc; using the starting position of the first coil of the screen line in the negative disc as a position reference, connecting the starting point of the first coil of the screen line in the negative disc to the end point of the outermost coil of the screen line in the positive disc via an arc.

[0132] For example, the main line is connected between the positive and negative discs respectively. According to the main line transposition method between the positive and negative discs, the coordinates of the last group of the negative discs and the starting point of the first group of the positive discs and the main line are connected by an arc-shaped wire loop model. The value range of the wire transposition method is from 1 to the number of wire loops. The connection method of the main wire exit between wire discs corresponds to the connection method of wire transposition as follows: Figures 4 to 6 As shown.

[0133] When the representative number for the wire transposition method is 1, the inter-diagram connection method is as follows: Figure 4 As shown; when the representative number for the wire transposition method is 2, the connection method between the two ends is as follows. Figure 5 As shown; similarly, when the conductor transposition method is the same as the number of parallel windings, the connection method between the ends of the discs is as follows. Figure 6 As shown in the figure The wires for the positive and negative discs are wound several times. This represents the total number of turns in the inverted pie chart model. According to... Figure 4 , Figure 5 and Figure 6 Introducing an arc connection scheme between the positive and negative pie models.

[0134] For example, taking the starting position of the first turn of the inverted pancake screen line as a reference, the coordinates of the starting point of the first turn of the inverted pancake screen line and the ending point of the outermost turn of the positive pancake screen line are connected by an arc. Among them, the first turn of the inverted pancake screen line is the outermost turn of the inverted pancake screen line, so that the outermost screen lines between the pancakes are connected, and the starting or ending point of the innermost screen line is left suspended.

[0135] In this embodiment, the main wires are connected between the wire discs by transposing the wires, and the screen wires are connected between the wire discs according to the defined connection method. This can accurately simulate the relative positions and connection relationships between the positive and negative discs in the winding of an inner-screen transformer, realize the reproduction of complex structures, and thus improve the accuracy and reliability of the entire modeling process.

[0136] In one embodiment, for two adjacent sets of double-line disc 3D entities, the arc of the last turn of the positive disc in the previous set of double-line disc 3D entities is retracted by the corresponding number of arcs multiplied by a unit arc to obtain a fourth product; based on the fourth product, the starting and ending arcs of each turn of the reverse disc in the next set of double-line disc 3D entities are corrected; based on the ordinate of the turns wound in the previous set of double-line disc 3D entities and the axial spacing between the two adjacent sets of double-line disc 3D entities, the ordinate of the turns wound in the next set of double-line disc 3D entities is corrected; based on the main line transposition method between the positive disc in the previous set of double-line disc 3D entities and the reverse disc in the next set of double-line disc 3D entities, the arcs in the next set of double-line disc 3D entities are... The starting point of the first set of main lines in the reverse pancake is connected to the ending point of the last set of main lines in the positive pancake of the previous double-pancake 3D entity; the starting position of the first coil of the screen wire wound in the reverse pancake of the next double-pancake 3D entity is used as the position reference, and the starting point of the first coil of the screen wire wound in the reverse pancake of the next double-pancake 3D entity is connected to the ending point of the outermost coil of the screen wire wound in the positive pancake of the previous double-pancake 3D entity through an arc; for the arc connecting two adjacent sets of double-pancake 3D entities, the cross-section of the conductor is determined according to the radial width and axial height of the conductor used in the arc, and based on the cross-section, the sweep is performed along the movement trajectory of the arc, and the sweep result is compared with multiple double-pancake 3D entities to obtain a single-coil 3D entity.

[0137] For example, a single coil is composed of multiple positive and negative coils connected alternately, and each group of double coils contains one positive and one negative coil. Double coil models 1-2, 3-4, 5-6, etc. are constructed sequentially from top to bottom, and the modeling of all coils in the single coil is completed.

[0138] Specifically, if the first coil of the first double-coil pancake is a reverse coil, and the second coil of the first group of coils is a regular coil, after completing the modeling of the three-dimensional entity of the first group of double-coil pancakes, the product is obtained by multiplying the number of arcs that are backed by the last coil of the regular coil in the three-dimensional entity of the first group of double-coil pancakes by the corresponding number of arcs. Based on the product, the starting arc and ending arc of each coil of the reverse coil in the three-dimensional entity of the next group of double-coil pancakes are corrected, and so on, the starting arc and ending arc of each coil of other double-coil pancakes are corrected.

[0139] Specifically, based on the ordinate of the turn in the first set of double-line discs and the axial spacing between the two adjacent sets of double-line disc 3D entities, the ordinate of the turn in the next set of double-line discs is corrected. According to the transposition method between the double-line discs, an arc connects the starting point of the first main line in the reverse disc of the next set of double-line disc 3D entities to the ending point of the last main line in the positive disc of the previous set of double-line disc 3D entities. The transposition methods for the positive and reverse discs between each set of double-line discs can be different.

[0140] For example, using the starting position of the first coil of the screen line wound in the reverse disc of the next set of double-panel three-dimensional entities as a position reference, an arc connects the starting point of the first coil of the screen line wound in the reverse disc of the next set of double-panel three-dimensional entities to the ending point of the outermost coil of the screen line wound in the positive disc of the previous set of double-panel three-dimensional entities. Furthermore, when connecting the screen lines between each panel, screen line connections can be made across panels, not between adjacent panels. During the connection process, the screen lines always connect to the outermost coil of each panel, leaving the starting or ending position of the innermost coil of each panel suspended.

[0141] For example, the cross-section of the conductor is determined based on the arc connecting two adjacent sets of double-line piece three-dimensional entities and the radial width and axial height of the conductor used for the arc. Based on the cross-section, a sweep is performed along the motion trajectory of the arc. The sweep result is compared with multiple double-line piece three-dimensional entities to obtain a single-coil three-dimensional entity.

[0142] In this embodiment, a single coil model is obtained by using the modeling parameters of the previous set of coils and the wire connection method between the two coils. This model can accurately simulate the effect of the internal structure of the coil in the inner-screen transformer winding, which helps to accurately construct the complex structure of the inner-screen transformer winding coil.

[0143] In one embodiment, the origin of a three-dimensional rectangular coordinate system is determined, and based on the origin, the position of the point on the turn in the single-coil three-dimensional entity is changed to be represented using three-dimensional rectangular coordinates; based on the transformer design parameters, at least two single-coil three-dimensional entities are spatially positioned; wherein, the conditions for spatial positioning satisfy that the coils on different voltage sides of the same phase share the same center, and the center distance between the coils that are not in the same phase is equal to the spacing between the main columns of the transformer core; the single-coil three-dimensional entities after spatial positioning are merged to obtain a multi-coil three-dimensional entity.

[0144] For example, an internally shielded transformer may have multi-phase coils, each phase coil being a single coil, and the model of the multi-phase coils is obtained based on the single coils. Specifically, the coordinates of the start and end points of all turns of the transformer coil should be transformed from the cylindrical coordinate system to the rectangular coordinate system, with the origin of the coordinate axes being the intermediate phase, the center point, and the upper surface of the lower yoke of the core. Based on the transformer design parameters, at least two single-coil three-dimensional entities are spatially located. Based on the single-coil modeling, a complete transformer winding model is constructed according to the number of single-phase coils, the number of phases, the spacing between the main columns of the core, and the coil height. The coils on different voltage sides of the same phase share the same center, and the center distance between coils of different phases is equal to the spacing between the main columns of the transformer core. The single-coil three-dimensional entities after spatial positioning are merged to obtain the multi-coil three-dimensional entities.

[0145] In this embodiment, multi-coil models are modeled based on single-coil models, which can achieve the effect of accurately constructing multi-coil models. It fully considers the relative positional relationship between multiple coils in the transformer inner shield winding and ensures the accurate position of each coil in the overall structure.

[0146] like Figure 7 As shown, a specific embodiment illustrates a parametric modeling method for the winding of an inner-shielded transformer, including steps 702 to 710. Wherein,

[0147] Step 702: Identify the inner screen winding based on the obtained parameters of the disc winding, and calibrate the obtained parameters.

[0148] Specifically, the parameters of the two coils (positive and negative) are obtained at one time, including the number of turns, the inner screen winding code (which includes the transposition method of each main wire in the coil, the number of turns of the main wire, the number of main wires wound in parallel, the number of coils shorted by the screen wire, and the number of screen wire turns), the arrangement order in the coil space, the radial and axial dimensions of each main wire and screen wire in the coil, and the inner and outer radii of the coil. Then, the inner screen winding code is used to identify whether the obtained coil is an inner screen coil.

[0149] Specifically, the acquired parameters are checked, including: a) whether both the reverse and forward coils are inner-screen type; b) whether the product of the number of turns of the main coil and the number of turns of the conductor equals the number of main coils in the arrangement sequence table; c) whether the number of turns of the screen wire equals the number of screen wires in the arrangement sequence table; d) whether the number of turns of the main coil in the reverse and forward coils is consistent; e) whether the difference between the outer and inner diameters of each coil in the coil is equal to the sum of the radial widths of all materials in each coil; f) whether the conductor type of the main coil in the coil is the same type of conductor; g) whether the conductor transposition method of the reverse and forward coils is consistent.

[0150] Step 704: Initialize the parameters of the obtained disc winding and determine the connection scheme of the main wire and screen wire in each disc.

[0151] Specifically, in the manufacturing process of the disc winding, support bars are used to divide the circumference into equal segments, with each segment corresponding to a certain arc. That is, the unit is radians. Each setting corresponds to radians. The calculation formula is:

[0152]

[0153] Specifically, the main lines and screen lines of each pie are numbered separately. Specifically, the main lines of each pie are numbered from 1 to the number of turns of the main line in the current pie. For a reverse pie, the main line numbering is defined from the outermost turn to the innermost turn; for a normal pie, the main line numbering is defined from the innermost turn to the outermost turn. Similarly, the screen lines of each pie are numbered from 1 to the number of turns. For a reverse pie, the screen line numbering is defined from the outermost turn to the innermost turn; for a normal pie, the screen line numbering is defined from the innermost turn to the outermost turn.

[0154] Taking the inner screen type wire disc with winding code "2-3×2-2P2" as an example, the main wire and screen wire numbers of its front and back discs are shown below. Figure 8 , Figure 9 , Figure 8 This describes the arrangement order of the turns and the wire numbering in the inner-screen inverted disc. Figure 9 The arrangement order and wire numbering of each coil in the inner-screen positive disc are shown in Table 3. The radius of the starting winding point of each turn can be calculated based on the coil arrangement order, material size, and coil inner diameter. Assuming the coil inner diameter is 300mm, the coil level parameters are shown in Table 3.

[0155] Table 3

[0156]

[0157] Therefore, the radius of the starting firing point of the wire coil numbered 3 in the reverse cake is:

[0158]

[0159] in, This indicates the width of the main line 1. This indicates the width of oil passage 1. This indicates the inner diameter of the coil.

[0160] Specifically, taking the inner-screen type coil with winding code "2-3×2-2P2" as an example, the main wire of the coil has 2 parallel windings, each main wire has 3 turns, and the screen wire in the coil has 2 turns. The connection scheme of the main wire turns within the inner-screen type coil is determined according to the wire number, as shown in Table 4. Furthermore, since there is no parallel winding of the screen wire, the screen wires within a single coil can be connected sequentially according to their screen wire numbers.

[0161] Table 4

[0162]

[0163] Step 706: Determine the start and end coordinates of each coil in the coil, and correct the end coordinates of the last group of coils in the coil.

[0164] Specifically, after confirming the coil curve connection scheme, the start and end coordinates of the coil are calculated according to the rules, and the end coordinate of the coil is related to the offset. The radial offset of the start and end coordinates of each main line or screen line should be calculated based on the connection scheme and the width of each material within the coil. Since the screen line may not be a full turn, the offset of the main line or screen line may differ in different coil arrangement positions, and the offset should be determined separately for each main line or screen line. For example, for Figure 8 The start and end coordinate offsets of the main line number 4 The calculation formula is:

[0165]

[0166] Specifically, since the last set of main wire turns in the coil may not be a full turn, the coordinates of the termination point of the last turn of each set of main wires are adjusted according to the number of turns removed from the coil. Furthermore, based on the number of turns of the screen cable, the radian coordinates of the termination point of the last turn of the screen cable are corrected. After determining the connection scheme and start / end coordinates of the coils within the pie chart, the coil curve trajectory can be confirmed based on these coordinates. The connection scheme for the coil curve trajectory is then confirmed based on the connection scheme within the pie chart, and the coil curve trajectories are connected. The cross-section corresponding to the connected coil curve trajectory is swept along the trajectory. If the coils are wound with flat conductors, the length and width of the cross-section correspond to the radial width and axial height of the coil parameters, respectively, thus obtaining the coil curve model. Based on the coil curve model, a positive pie chart model and a negative pie chart model are constructed.

[0167] Step 708: Connect the two line-based pie models, the inverted pie model and the upright pie model, into a double-line pie model.

[0168] Specifically, when the first line of the double-line disc is a reverse disc and the second line is a positive disc, firstly, if the retraction number of the reverse disc is not zero, then the radian coordinates of the start and end points of all main lines and screen lines in the positive disc are... All have been revised again.

[0169] Secondly, since the starting and ending ordinates of both the inverted and positive pie charts are 0, meaning the two pie charts are at the same vertical height, the ordinates of the starting and ending points of all main lines and screen lines in the pie charts are corrected based on the pie chart spacing. With the starting and ending ordinates of the positive pie chart fixed at 0, the starting and ending ordinates of the inverted pie chart are:

[0170]

[0171] in, and These are the ordinates of the starting and ending points of all turns in the inverted pie chart model before and after the correction. The spacing between the lines is denoted as 'pie'.

[0172] Next, based on the conductor transposition method, connect the last group of the inverted disc and the coordinates of the termination point around the main line, and the coordinates of the starting point of the first group of the positive disc and the coordinates of the starting point around the main line, using the arc-shaped coil model. Taking the inner-screen coil with winding code "2-3×2-2P2" as an example, the first number 2 indicates the transposition method of the main line, such as... Figure 5 As shown. Then, taking the starting position of the first turn of the inverted pancake screen line as a reference, connect the coordinates of the starting point of the first turn of the inverted pancake screen line and the coordinates of the ending point of the outermost turn of the positive pancake screen line using the arc line turn model.

[0173] Finally, based on the motion trajectory of the double-circuit pie coil and the arc, the cross-sections of the main line and screen line coils are swept along the trajectory to construct a three-dimensional coil entity using a two-dimensional curve trajectory. If the coil is wound with flat wire, the length and width of the cross-section correspond to the radial width and axial height of the coil parameters, respectively, thus obtaining the three-dimensional model of the double-circuit pie.

[0174] Step 710: Model single-coil and multi-coil models based on the double-line pie model.

[0175] Specifically, based on the modeling method of the double-line pie model described above, double-line pie models 1-2, 3-4, 5-6, etc., are constructed sequentially from top to bottom until the modeling of all pieces within a single coil is completed. During the single-coil modeling process, the number of steps back, the ordinate, all double-line pieces are connected, and the curve trajectory is swept into a solid shape, thus forming the single-coil model. In addition, if the center point coordinates of the bottommost pie of the coil are set to (0, 0, 0), then the center point coordinates of the topmost pie of the coil are (0, 0, coil height - piece height).

[0176] Table 5

[0177]

[0178] Specifically, based on the single-coil modeling, multi-coil modeling is carried out according to the number of single-phase coils, number of phases, spacing between iron core main columns, and coil height, so as to obtain the complete winding model of the inner-screen transformer. The windings of the same phase share the same center, and the center distance between the windings of non-same-phase coils is equal to the spacing between iron core main columns.

[0179] Taking a three-phase, two-winding power transformer as an example, in a rectangular coordinate system, with the middle phase, center point, and upper surface of the lower yoke set as the origin of the coordinate axes, the coordinates of the center points of the lowest coils of each coil of the transformer are shown in Table 5. The center distance of the iron core main column is... This refers to the distance from the bottom of the X-phase high / low voltage side coil to the upper surface of the lower yoke. For the height of the line cake, For the high / low voltage side coil of phase X.

[0180] Based on the confirmed multi-coil coordinate translation of the single-coil model, the final multi-coil model is obtained. The multi-coil model is a complete inner-shielded winding model of a transformer.

[0181] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0182] Based on the same inventive concept, this application also provides a parametric modeling device for inner-shielded transformer windings for implementing the parametric modeling method for inner-shielded transformer windings described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more parametric modeling device embodiments for inner-shielded transformer windings provided below can be found in the limitations of the parametric modeling method for inner-shielded transformer windings described above, and will not be repeated here.

[0183] In one exemplary embodiment, such as Figure 10As shown, a parametric modeling device for an inner-screen transformer winding is provided, comprising: an acquisition module 1002, a connection module 1004, a correction module 1006, and a sweep module 1008, wherein:

[0184] The acquisition module is used to acquire the initialization parameters of the disc winding, including the main wire number and the screen wire number.

[0185] The connection module is used to take the number of main wires wound as the number of main wire sets in the wire cake. For the Nth set of main wires, the main wire numbered N and the main wires whose numbers are separated from the numbers of the preceding main wires by the number of main wire sets are connected in sequence. The screen wires are connected in sequence according to the screen wire numbers. Based on the connected main wires and screen wires, the wire turn model of the inner screen wire cake is obtained.

[0186] The correction module is used to determine the motion trajectory of the coil in the inner screen-type pie based on the coordinate-defined rules, and to correct the motion trajectory.

[0187] The sweep module is used to determine the cross-section of the conductor based on the radial width and axial height of the conductor used in the coil; based on the cross-section, it sweeps along the movement trajectory of the coil to generate a three-dimensional coil entity.

[0188] The correction module is also used to correct the starting arc and / or ending arc of the coil wound by the coil based on the number of retractions generated when correcting the motion trajectory; and to correct the ordinate of the coil wound by the coil.

[0189] The sweeping module is also used to make lead-out connections of the main line and screen line between the positive and negative pie, respectively. Based on the cross-section of the conductor used for the lead-out connection, it sweeps along the movement trajectory of the lead-out connection line and integrates the sweeping results with the three-dimensional line turn entity to obtain the three-dimensional entity of the double-line pie.

[0190] In one embodiment, the initialization parameters also include unit radians; the acquisition module is further used to acquire the initialization parameters of the disc winding, including: dividing the corresponding circumference of the disc winding turns into multiple radians, taking each radian as a unit radian, and each unit radian corresponding to a unit position; numbering the main line and screen line of the reverse disc from the outside to the inside of the inner screen disc to obtain the main line number and screen line number of the reverse disc; numbering the main line and screen line of the positive disc from the inside to the outside of the inner screen disc to obtain the main line number and screen line number of the positive disc; starting from the inner diameter of the disc, superimposing the material width in the disc arrangement sequence to obtain the starting winding point radius of the turns in the disc in the radial direction.

[0191] In one embodiment, the acquisition module is further configured to acquire coordinate custom rules including setting the starting winding position of the first coil in the reverse pancake to the first setting, setting the interval between the starting winding positions of adjacent parallel main lines to the first setting, connecting adjacent coils of the same set of main lines end to end, setting each coil to full-turn winding, and setting the same coil to no displacement in the axial direction; based on the coordinate custom rules, determining the motion trajectory of the coils in the pancake includes: superimposing the radial width of each layer of material that the main line passes through in the radial direction to obtain the radial offset of the main line; superimposing the radial width of each layer of material that the screen line passes through in the radial direction to obtain the radial offset of the screen line; and determining the motion trajectory of the coils in the pancake based on the radial offset of the main line, the radial offset of the screen line, the radius of the starting winding point of the coil in the pancake in the radial direction, and the unit radian.

[0192] In one embodiment, the correction module is further configured to correct the motion trajectory, including: obtaining a first product between the total number of turns to be reversed and the unit radian, obtaining the reversal radian, and reversing the terminating radian of the last turn wound by the main line back to the reversal radian, so as to correct the motion trajectory of the main line turn; when the number of turns wound by the screen line is a full integer, not correcting the terminating radian of the last turn wound by the screen line; when the number of turns wound by the screen line is not a full integer, obtaining the difference in turns between the number of turns wound by the screen line and the full integer number of turns obtained by rounding up the number of turns wound by the screen line, converting the difference in turns into the difference number of turns, obtaining a second product between the result of rounding up the difference number of turns and the unit radian, and reversing the terminating radian of the last turn wound by the screen line back to the radian corresponding to the second product, so as to correct the motion trajectory of the screen line turn.

[0193] In one embodiment, the correction module is further configured to correct the starting arc and / or ending arc of the coil wound by the coil disc based on the number of retractions generated when correcting the motion trajectory, including: when there is retraction in the reverse disc, multiplying the number of retractions corresponding to the arc retraction of the last coil wound by the reverse disc by a unit arc to obtain a third product; and correcting the starting arc and / or ending arc of each coil wound by the positive disc according to the third product.

[0194] In one embodiment, the connection module is further used to connect the main line and screen line of the positive and negative discs respectively, including: according to the main line transposition method between the positive and negative discs, connecting the end point of the last group of main lines in the negative disc to the starting point of the first group of main lines in the positive disc through an arc; taking the starting position of the first coil of the screen line in the negative disc as the position reference, connecting the starting point of the first coil of the screen line in the negative disc to the end point of the outermost coil of the screen line in the positive disc through an arc.

[0195] In one embodiment, the correction module is further configured to, for two adjacent sets of double-line disc 3D entities, multiply the number of arcs that the last turn of the positive disc in the previous set of double-line disc 3D entities retracts by a unit arc to obtain a fourth product; based on the fourth product, correct the starting and ending arcs of each turn of the reverse disc in the next set of double-line disc 3D entities; correct the ordinate of the turns of the turns in the next set of double-line disc 3D entities based on the ordinate of the turns wound in the previous set of double-line disc 3D entities and the axial spacing between the two adjacent sets of double-line disc 3D entities; and, based on the main line transposition method between the positive disc in the previous set of double-line disc 3D entities and the reverse disc in the next set of double-line disc 3D entities, use arcs to transpose the next set of double-line disc 3D entities. The starting point of the first set of main lines in the reverse disc of the three-dimensional entity is connected to the ending point of the last set of main lines in the positive disc of the previous set of double-line discs. The starting position of the first coil of the screen wire wound in the reverse disc of the next set of double-line discs is used as the position reference. The starting point of the first coil of the screen wire wound in the reverse disc of the next set of double-line discs is connected to the ending point of the outermost coil of the screen wire wound in the positive disc of the previous set of double-line discs through an arc. For the arc connecting two adjacent sets of double-line discs, the cross-section of the conductor is determined according to the radial width and axial height of the conductor used in the arc. Based on the cross-section, the arc is swept along the movement trajectory. The sweeping result is compared with multiple double-line discs to obtain a single-coil three-dimensional entity.

[0196] In one embodiment, the acquisition module is further configured to determine the origin of the three-dimensional rectangular coordinate system, and based on the origin, change the position of the point on the turn in the single coil three-dimensional entity to be represented using three-dimensional rectangular coordinates; based on the transformer design parameters, spatially locate at least two single coil three-dimensional entities; wherein the conditions for spatial positioning satisfy that the coils on different voltage sides of the same phase share the same center, and the center distance between the coils that are not in the same phase is equal to the spacing between the main columns of the transformer core; and merge the single coil three-dimensional entities after spatial positioning to obtain a multi-coil three-dimensional entity.

[0197] Each module in the parametric modeling device for the aforementioned internal shielded transformer winding can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the operations corresponding to each module.

[0198] In one exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 11As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When executed by the processor, the computer program implements a parametric modeling method for an internally shielded transformer winding.

[0199] Those skilled in the art will understand that Figure 11 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0200] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0201] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0202] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0203] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0204] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0205] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A parametric modeling method for inner-shielded transformer windings, characterized in that, The method includes: Obtain the initialization parameters of the disc winding, including the main line number and the screen line number; The number of main wires wound together is taken as the number of main wire sets within the wire cake. For the Nth set of main wires, the main wire numbered N and the main wires whose numbers are separated from the numbers of the preceding main wires by the number of main wire sets are connected in sequence. The screen wires are connected in sequence according to their numbers. Based on the connected main wires and screen wires, the wire turn model of the inner screen wire cake is obtained. Based on the coordinate-defined rules, the motion trajectory of the coil in the inner screen-type pie is determined, and the motion trajectory is corrected. Based on the radial width and axial height of the conductor used for the corresponding coil, the cross-section of the conductor is determined; based on the cross-section, a sweep is performed along the movement trajectory of the coil to generate a three-dimensional coil entity. Based on the number of retractions generated when correcting the motion trajectory, the starting arc and / or ending arc of the coil wound by the coil are corrected; the ordinate of the coil wound by the coil is corrected. The main line and screen line are connected to the positive and negative pie respectively. Based on the cross-section of the conductor used for the connection, the motion trajectory of the connection line is swept. The sweeping result is integrated with the three-dimensional line turn entity to obtain the three-dimensional entity of the double pie.

2. The method according to claim 1, characterized in that, The initialization parameters also include unit radians; obtaining the initialization parameters of the disc winding includes: The circumference of the corresponding turn of the disc winding is divided into multiple arcs, each arc is taken as a unit arc, and each unit arc corresponds to a unit gear. The main lines and screen lines of the reverse pie are numbered from the outside to the inside of the inner screen pie to obtain the main line number and screen line number of the reverse pie; the main lines and screen lines of the positive pie are numbered from the inside to the outside of the inner screen pie to obtain the main line number and screen line number of the positive pie. Starting from the inner diameter of the coil, the radial width of the material in the coil arrangement sequence is superimposed to obtain the starting winding point radius of the coil in the radial direction.

3. The method according to claim 1, characterized in that, The coordinate customization rules include setting the starting winding position of the first coil in the reverse disc to the first level, setting the interval between the starting winding positions of adjacent parallel main lines to level 1, connecting adjacent coils of the same main line end to end, setting each coil to full-turn winding, and setting the same coil to no displacement in the axial direction. The determination of the motion trajectory of the coil in the coil pie based on the coordinate-defined rules includes: The radial offset of the main line is obtained by superimposing the radial widths of each layer of material it passes through in the radial direction; the radial offset of the screen line is obtained by superimposing the radial widths of each layer of material it passes through in the radial direction. The motion trajectory of the coil in the coil is determined based on the radial offset of the main line, the radial offset of the screen line, the radius of the starting winding point of the coil in the coil disc in the radial direction, and the unit radian.

4. The method according to claim 1, characterized in that, The correction of the motion trajectory includes: Obtain the first product between the total number of turns to be reversed and the unit radian, and get the reversal radian. Reverse the terminating radian of the last turn of the main line to the reversal radian to correct the movement trajectory of the main line turn. When the number of turns of the screen wire is not a full integer, the difference in turns between the number of turns of the screen wire and the full integer number of turns obtained by rounding up the number of turns of the screen wire is obtained. The difference in turns is converted into a difference range number. The second product between the result of rounding up the difference range number and the unit radian is obtained. The termination radian of the last turn of the screen wire is returned to the corresponding radian of the second product to correct the movement trajectory of the screen wire turns.

5. The method according to claim 1, characterized in that, The correction of the starting and / or ending arc of the coil wound on the coil based on the number of retractions generated when correcting the motion trajectory includes: In the case of a retraction in the reversed coil, the retraction number corresponding to the retraction of the last coil of the reversed coil is multiplied by the unit arc to obtain a third product; based on the third product, the starting arc and / or ending arc of each coil of the forward coil are corrected.

6. The method according to claim 1, characterized in that, The connection of the main line and screen line between the positive and negative pie charts includes: Based on the way the main lines are interchanged between the positive and negative pie charts, an arc is used to connect the end point of the last set of main lines in the negative pie chart to the beginning point of the first set of main lines in the positive pie chart. Using the starting position of the first coil of the screen wire wound in the reverse disc as the position reference, the starting point of the first coil of the screen wire wound in the reverse disc is connected to the ending point of the outermost coil of the screen wire wound in the positive disc through an arc.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: For two adjacent sets of double-line disc three-dimensional entities, the arc of the last turn of the positive disc in the previous set of double-line disc three-dimensional entities is backed by the corresponding number of arcs, multiplied by the unit arc, to obtain the fourth product; based on the fourth product, the starting arc and ending arc of each turn of the reverse disc in the next set of double-line disc three-dimensional entities are corrected. Based on the ordinate of the coils wound in the previous set of double-coil three-dimensional entities and the axial spacing between two adjacent sets of double-coil three-dimensional entities, the ordinate of the coils wound in the next set of double-coil three-dimensional entities is corrected. Based on the main line transposition method between the positive cake in the previous set of double-lined 3D entities and the negative cake in the next set of double-lined 3D entities, the starting point of the last set of main lines in the negative cake in the next set of double-lined 3D entities is connected to the ending point of the last set of main lines in the positive cake in the previous set of double-lined 3D entities by an arc. Using the starting position of the first coil of the screen line in the reverse pancake of the next set of double-pancake three-dimensional entities as the position reference, the starting point of the first coil of the screen line in the reverse pancake of the next set of double-pancake three-dimensional entities is connected to the ending point of the outermost coil of the screen line in the positive pancake of the previous set of double-pancake three-dimensional entities through an arc. For the arc connecting two adjacent sets of double-line disc three-dimensional entities, the cross-section of the conductor is determined according to the radial width and axial height of the conductor used for the arc. Based on the cross-section, a sweep is performed along the movement trajectory of the arc. The sweep result is compared with multiple double-line disc three-dimensional entities to obtain a single-coil three-dimensional entity.

8. The method according to claim 7, characterized in that, The method further includes: Determine the origin of the three-dimensional rectangular coordinate system, and based on the origin, change the position of the point on the turn in the three-dimensional entity of the single coil to be represented using three-dimensional rectangular coordinates; Based on transformer design parameters, at least two single-coil three-dimensional entities are spatially located; wherein, the conditions for spatial location are that coils on different voltage sides of the same phase share the same center, and the center distance between coils that are not in the same phase is equal to the spacing between the main columns of the transformer core. After spatial positioning is completed, the single-coil 3D entity is merged to obtain a multi-coil 3D entity.

9. A parametric modeling device for an internally shielded transformer winding, characterized in that, The device includes: The acquisition module is used to acquire the initialization parameters of the disc winding, including the main line number and the screen line number. The connection module is used to take the number of main wires wound as the number of main wire sets in the wire cake. For the Nth set of main wires, the main wire numbered N and the main wires whose numbers are separated from the numbers of the preceding main wires by the number of main wire sets are connected in sequence. The screen wires are connected in sequence according to the screen wire numbers. Based on the connected main wires and screen wires, the wire turn model of the inner screen wire cake is obtained. The correction module is used to determine the motion trajectory of the coil in the inner screen-type coil based on the coordinate custom rules, and to correct the motion trajectory; The sweeping module is used to determine the cross-section of the conductor based on the radial width and axial height of the conductor used in the coil; based on the cross-section, it sweeps along the movement trajectory of the coil to generate a three-dimensional coil entity. The correction module is also used to correct the starting arc and / or ending arc of the coil wound by the coil based on the number of retractions generated when correcting the motion trajectory; and to correct the ordinate of the coil wound by the coil. The sweeping module is also used to make lead-out connections of the main line and screen line between the positive and negative pie, respectively. Based on the cross-section of the conductor used for the lead-out connection, it sweeps along the movement trajectory of the lead-out connection line and integrates the sweeping result with the three-dimensional line turn entity to obtain the three-dimensional entity of the double-line pie.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8.

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