Method, device and equipment for evaluating winding short-circuit performance based on reactor model

Abstract

The present application relates to a method, device, computer equipment, computer-readable storage medium and computer program product for evaluating the winding short-circuit performance based on a reactor model. The method includes: simulating the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model; determining the leakage magnetic flux component of the outgoing wire of the coil winding based on the preset short-circuit condition, the reactor model and the leakage magnetic flux distribution, and determining the simulated radial electrodynamic force of the outgoing wire based on the leakage magnetic flux component; determining the theoretical radial bearing force of the outgoing wire based on the reactor model; determining the radial bearing capacity parameter of the outgoing wire according to the simulated radial electrodynamic force and the theoretical radial bearing force, and obtaining the evaluation result of the radial force performance of the coil winding based on the radial bearing capacity parameter. Compared with the prior art, the present application helps to discover potential safety hazards of the reactor in advance through the comparison calculation of the simulation value and the theoretical value, so as to take measures for prevention in a timely manner.

Description

Technical Field

[0001] The present application relates to the technical field of reactors, and in particular to a method, device, computer device, computer-readable storage medium, and computer program product for evaluating the winding short-circuit performance based on a reactor model. Background Art

[0002] Power transformers are the core equipment for transmitting energy in the power grid. When a short-circuit fault occurs outside the transformer, under the action of the system impedance and the transformer's own impedance, the magnitude of the short-circuit current is determined. To effectively limit the short-circuit current passing through the transformer, transformers with large impedance are usually used. To increase the impedance of the transformer, one method is to connect a hollow reactor in series with the low-voltage winding.

[0003] However, when a short circuit occurs, the series reactor also needs to withstand the electromagnetic force generated by the large current. This electromagnetic force is a radial tensile force in the radial direction of the winding, that is, an outward force. Under the action of the radial tensile force, if the leading wire of the winding fails to effectively resist, it will cause the leading wire to protrude outward, which will further lead to problems such as loose winding compression, insulation damage, and reduction of insulation distance, seriously affecting the safe operation of the transformer. Currently, the common practice is to take measures such as tying and limiting the leading wire according to the experience of technicians to resist the radial tensile force acting on the leading wire and prevent the leading wire from protruding outward.

[0004] However, due to the variety of winding types and the different actual sizes of different windings, the performance of different windings under radial electrodynamic force (i.e., radial force) is also different. Relying solely on experience to determine the radial force and using this as a basis to limit the leading wire has poor applicability and effectiveness, resulting in poor stability of the leading wire during use and being unfavorable to the stable operation of the reactor. Summary of the Invention

[0005] Based on this, it is necessary to provide a method, device, computer device, computer-readable storage medium, and computer program product for evaluating the winding short-circuit performance based on a reactor model that can evaluate the radial force for windings of different models and sizes.

[0006] In a first aspect, the present application provides a method for evaluating the winding short-circuit performance based on a reactor model, the method comprising:

[0007] Simulating the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model;

[0008] Determining the leakage magnetic flux component of the leading wire of the coil winding based on the preset short-circuit condition, the reactor model, and the leakage magnetic flux distribution, and determining the simulated radial electrodynamic force of the leading wire based on the leakage magnetic flux component;

[0009] Determine the theoretical radial bearing force of the leading-out wire based on the reactor model;

[0010] Determine the radial bearing capacity parameter of the leading-out wire according to the simulated radial electromagnetic force and the theoretical radial bearing force, and obtain the evaluation result of the radial force performance of the coil winding based on the radial bearing capacity parameter.

[0011] In one embodiment, the simulation of the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model includes:

[0012] Apply an excitation to the coil winding in the reactor model based on preset excitation parameters, and make the reactor model simulate and operate under the excitation to obtain the magnetic field distribution of the coil winding.

[0013] In one embodiment, before the simulation of the operation of the reactor model under a preset short-circuit condition, it further includes:

[0014] Perform geometric modeling on the reactor according to the structural parameters of the reactor to obtain the geometric model of the reactor;

[0015] Add material properties to the geometric model according to the material of the reactor to obtain an intermediate geometric model;

[0016] Configure boundary conditions and excitation sources for the coil winding model in the intermediate geometric model to obtain a reactor model; the excitation source is used to apply an excitation to the coil winding model according to preset excitation parameters.

[0017] In one embodiment, determining the leakage magnetic flux component of the leading-out wire of the coil winding based on the reactor model, the leakage magnetic flux distribution, and the preset short-circuit condition, and determining the simulated radial electromagnetic force of the leading-out wire based on the leakage magnetic flux component includes:

[0018] Determine the position coordinates of the leading-out wire of the coil winding;

[0019] Extract the leakage magnetic flux component of the leading-out wire at the position coordinates based on the leakage magnetic flux distribution;

[0020] Determine the simulated radial electromagnetic force of the leading-out wire according to the preset excitation parameters, the leakage magnetic flux component, and the size parameters of the coil winding.

[0021] In one embodiment, at least two wire cakes are stacked axially along the coil winding in the coil winding; the method further includes:

[0022] Determine the first frictional force between the target wire cake to which the end lead wire belongs and the adjacent wire cake according to the attribute parameters of the reactor model; the attribute parameters include the friction coefficient between the target wire cake and the adjacent wire cake and the axial pressing force when the end lead wire is in a compressed state in the axial direction;

[0023] The determining the theoretical radial bearing force of the end lead wire based on the reactor model includes:

[0024] Determine the theoretical radial bearing force of the end lead wire based on the first frictional force.

[0025] In one embodiment, the method further includes:

[0026] Determine the second frictional force between the target wire cake and the adjacent wire cake based on the limiting acting force of the limiting structure between the target wire cake and the adjacent wire cake;

[0027] The determining the theoretical radial bearing force of the end lead wire based on the reactor model includes:

[0028] Determine the theoretical radial bearing force of the end lead wire based on the first frictional force and the second frictional force.

[0029] In one embodiment, the obtaining the radial force performance evaluation result of the coil winding based on the radial bearing capacity parameter includes:

[0030] Set a safety factor, compare the radial bearing capacity parameter with the safety factor to obtain a comparison result;

[0031] Determine the radial force performance evaluation result of the coil winding according to the comparison result.

[0032] In a second aspect, the present application further provides a winding short-circuit performance evaluation device based on a reactor model, and the device includes:

[0033] A simulation operation module, configured to simulate the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model;

[0034] A first calculation module, configured to determine the leakage magnetic flux component of the end lead wire of the coil winding based on the preset short-circuit condition, the reactor model and the leakage magnetic flux distribution, and determine the simulated radial electrodynamic force of the end lead wire based on the leakage magnetic flux component;

[0035] A second calculation module, configured to determine the theoretical radial bearing force of the end lead wire based on the reactor model;

[0036] A result evaluation module, configured to determine the radial bearing capacity parameter of the outgoing wire according to the simulated radial electrodynamic force and the theoretical radial bearing force, and obtain the evaluation result of the radial force performance of the coil winding based on the radial bearing capacity parameter.

[0037] In a third aspect, the present application further provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the method described above are implemented.

[0038] In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described above are implemented.

[0039] In a fifth aspect, the present application further provides a computer program product, including a computer program. When the computer program is executed by a processor, the steps of the method described above are implemented.

[0040] The above-mentioned winding short-circuit performance evaluation method, device, computer device, computer-readable storage medium, and computer program product based on the reactor model simulate the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic field distribution on the coil winding in the reactor model, determine the leakage magnetic field component of the outgoing wire of the coil winding based on the reactor model, the leakage magnetic field distribution, and the preset short-circuit condition, and determine the simulated radial electrodynamic force of the outgoing wire based on the leakage magnetic field component, which can accurately simulate the state of the reactor during actual operation, more accurately obtain the leakage magnetic field distribution on the coil winding, and then accurately calculate the leakage magnetic field component of the outgoing wire on the coil winding to obtain the simulated radial electrodynamic force. Subsequently, determine the theoretical radial bearing force of the outgoing wire based on the reactor model, determine the radial bearing capacity parameter of the outgoing wire according to the simulated radial electrodynamic force and the theoretical radial bearing force, and obtain the evaluation result of the radial force performance of the coil winding based on the radial bearing capacity parameter. Through the comparison calculation of the simulation value and the theoretical value, it helps to discover potential safety hazards of the reactor in advance, so as to take measures for prevention in a timely manner. At the same time, during the design stage of the reactor, it can also avoid multiple iterations and modifications during the actual manufacturing and testing processes, thus saving a large amount of R & D costs and time. Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for describing the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on these drawings.

[0042] Figure 1It is an application environment diagram of a winding short - circuit performance evaluation method based on a reactor model in an embodiment;

[0043] Figure 2 It is a schematic flow diagram of a winding short - circuit performance evaluation method based on a reactor model in an embodiment;

[0044] Figure 3 It is a schematic flow diagram of constructing a reactor model in an embodiment;

[0045] Figure 4 It is a schematic structural diagram of a reactor in an application example;

[0046] Figure 5 It is a contour map of the magnetic field distribution during the simulation operation of a reactor in an application example;

[0047] Figure 6 It is a schematic structural diagram of a coil winding in an application example;

[0048] Figure 7 It is a schematic diagram of the radial tensile force borne by the outgoing conductor in an application example;

[0049] Figure 8 It is a structural block diagram of a winding short - circuit performance evaluation device based on a reactor model in an embodiment;

[0050] Figure 9 It is an internal structural diagram of a computer device in an embodiment. Detailed implementation manners

[0051] In order to make the objectives, technical solutions, and advantages of this application clearer, the following further elaborates on this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0052] The winding short - circuit performance evaluation method based on a reactor model provided by the embodiments of this application can be applied to, for example Figure 1In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be integrated on the server 104, or placed on the cloud or other network servers. The server 104 calls the pre-built reactor model to simulate the operation of the reactor model under the preset short-circuit condition, so as to obtain the leakage magnetic flux distribution of the reactor model under the preset short-circuit condition, and determine the simulated radial electromagnetic force of the outgoing wire of the reactor model during the simulation operation based on the leakage magnetic flux distribution. The server 104 then determines the theoretical radial bearing force of the outgoing wire based on the reactor model. Subsequently, the simulated radial electromagnetic force is compared with the theoretical radial bearing force to obtain the radial bearing capacity parameter of the outgoing wire, and further obtain the evaluation result of the radial force performance of the coil winding, so as to provide an accurate and feasible reference basis for the limitation and fixation of the outgoing wire of the reactor and ensure the stable operation of the reactor. Among them, the terminal 102 can be, but is not limited to, various personal computers, laptop computers, smart phones, and tablet computers. The server 104 can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0053] In one embodiment, as Figure 2 shown, a method for evaluating the short-circuit performance of a winding based on a reactor model is provided. Taking the server 104 in Figure 1 as an example for illustration, it can be understood that this method can also be applied to the terminal 102 in Figure 1 and can also be applied to a system including the terminal 102 and the server 104, which is realized through the interaction between the terminal 102 and the server 104. The method of this embodiment includes:

[0054] Step S201, simulate the operation of the reactor model under the preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model.

[0055] Among them, the reactor model refers to a model obtained by mathematically or physically modeling the actual reactor, which is used to simulate the actual operation behavior of the reactor in the simulation software, so as to analyze and predict the relevant performance of the reactor under the preset working conditions; the reactor model can be an equivalent circuit model modeled based on circuit theory, or a finite element model modeled based on electromagnetic field theory.

[0056] In an optional embodiment, the reactor includes an oil tank, an upper yoke, a lower yoke disposed inside the oil tank, and at least one coil winding disposed between the upper yoke and the lower yoke. Among them, the upper yoke is located at the first axial end of the coil winding, the lower yoke is located at the second axial end of the coil winding, and the first axial end and the second axial end of the coil winding are respectively the two axial ends of the coil winding. The upper yoke and the lower yoke clamp the coil winding to cooperate with the limit and fix the coil winding, ensuring that the coil winding does not displace or deform during the operation of the reactor, thereby maintaining the stability and reliability of the reactor operation.

[0057] Among them, the coil winding, as the core part of the reactor, is wound by a wire and is used to store and release magnetic field energy. In this embodiment, the coil winding is of a pancake structure, that is, the coil winding includes at least two wire pancakes stacked axially.

[0058] Among them, the preset short-circuit condition refers to the setting of parameters such as the operating environment and working conditions of the reactor model before simulating the operation of the reactor model, so as to ensure that the reactor model simulates the actual operation of the reactor, and further ensure accurate simulation results. The preset short-circuit condition can include operating parameters such as the working voltage, current, and working frequency of the reactor model, and can also include environmental parameters such as environmental temperature and humidity.

[0059] Among them, simulating the operation of the reactor model refers to the process of dynamically simulating the reactor model using computer simulation software. During the simulation process, by inputting various parameters under the preset short-circuit condition, the response of the reactor model under these parameters is obtained, and then the relevant performance of the reactor model is obtained.

[0060] Among them, the leakage magnetic flux distribution refers to the distribution of the magnetic force lines that leak into the surrounding space when the magnetic field cannot be completely confined inside the coil winding during the simulation operation of the reactor model.

[0061] Exemplarily, the server sets the operating condition of the reactor model according to the preset short-circuit condition and controls the reactor model to simulate and operate under the preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model.

[0062] Simulate the operation of the reactor model under the preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model.

[0063] Step S202, based on the preset short-circuit condition, the reactor model, the leakage magnetic flux distribution, determine the leakage magnetic flux component of the outgoing wire of the coil winding, and determine the simulated radial electrodynamic force of the outgoing wire based on the leakage magnetic flux component.

[0064] Among them, the extended conductor refers to the wire part where the coil winding is connected to the external circuit. On the coil winding, the extended conductor is usually located on the wire cake at the first axial end or the second axial end of the coil winding. The extended conductor is usually located outside the reactor model and serves as the structure for the external connection of the coil winding, used for inputting or outputting current.

[0065] Among them, the leakage magnetic component refers to the magnetic line density or magnetic induction intensity in a specific direction in the leakage magnetic field, used to evaluate the degree of electromagnetic interference of the reactor model on the surrounding environment.

[0066] Among them, the simulated radial electrodynamic force refers to the simulated value of the radial electromagnetic force acting on the extended conductor of the coil winding calculated according to the leakage magnetic component during the simulation operation of the reactor model. The radial electromagnetic force is generated due to the interaction between the magnetic lines of force in the leakage magnetic field and the extended conductor.

[0067] Exemplarily, the server determines the leakage magnetic component acting on the extended conductor of the coil winding based on a preset short - circuit condition, the reactor model, and the leakage magnetic distribution, and determines the simulated value of the radial electromagnetic force on the extended conductor based on the leakage magnetic component on the extended conductor, thereby obtaining the simulated radial electrodynamic force of the extended conductor.

[0068] Step S203: Determine the theoretical radial bearing capacity of the extended conductor based on the reactor model.

[0069] Among them, the theoretical radial bearing capacity refers to the theoretical value of the radial electromagnetic force acting on the extended conductor of the coil winding calculated according to the relevant parameters in the modeling process of the reactor model. It is also generated due to the interaction between the magnetic lines of force in the leakage magnetic field and the extended conductor.

[0070] Exemplarily, the server calculates the theoretical value of the radial electrodynamic force on the extended conductor based on the relevant parameters in the modeling process of the reactor model, thereby obtaining the theoretical radial bearing capacity of the extended conductor.

[0071] Step S204: Determine the radial bearing capacity parameter of the extended conductor according to the simulated radial electrodynamic force and the theoretical radial bearing capacity, and obtain the evaluation result of the radial force performance of the coil winding based on the radial bearing capacity parameter.

[0072] Among them, the radial bearing capacity parameter refers to the parameter used to characterize the magnitude of the force that the extended conductor can bear in the radial direction. The larger the radial bearing capacity parameter, the greater the force that the extended conductor can bear, and it is not easy to deform, thus ensuring the stable operation of the reactor. On the contrary, it indicates that the force that the extended conductor can bear is smaller, it is easier to deform, and the operation of the reactor is more unstable.

[0073] Exemplarily, the server determines the radial bearing capacity parameter of the end lead according to the simulated radial electromagnetic force obtained during the simulation operation of the reactor model and the theoretical radial bearing force obtained based on the relevant parameters in the process of modeling the reactor model. Subsequently, based on the radial bearing capacity parameter, the evaluation result of the radial force performance of the coil winding is obtained, which is convenient for the designer to judge whether the radial electromagnetic force received by the end lead is within its bearing range.

[0074] In the above method for evaluating the short-circuit performance of the winding based on the reactor model, by simulating the operation of the reactor model under a preset short-circuit condition, the leakage magnetic flux distribution on the coil winding in the reactor model is obtained. Based on the reactor model, the leakage magnetic flux distribution, and the preset short-circuit condition, the leakage magnetic flux component of the end lead of the coil winding is determined, and based on the leakage magnetic flux component, the simulated radial electromagnetic force of the end lead is determined. It can accurately simulate the state of the reactor during actual operation, more accurately obtain the leakage magnetic flux distribution on the coil winding, and then accurately calculate the leakage magnetic flux component of the end lead on the coil winding to obtain the simulated radial electromagnetic force. Subsequently, based on the reactor model, the theoretical radial bearing force of the end lead is determined. According to the simulated radial electromagnetic force and the theoretical radial bearing force, the radial bearing capacity parameter of the end lead is determined. Based on the radial bearing capacity parameter, the evaluation result of the radial force performance of the coil winding is obtained. Through the comparison calculation of the simulation value and the theoretical value, it helps to discover potential safety hazards of the reactor in advance, so as to take measures for prevention in a timely manner. At the same time, in the design stage of the reactor, it can also avoid multiple iterations and modifications during the actual manufacturing and testing processes, thus saving a large amount of R & D costs and time.

[0075] In one embodiment, simulating the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model includes:

[0076] Loading an excitation on the coil winding in the reactor model based on the preset excitation parameters, enabling the reactor model to simulate and operate under the excitation to obtain the magnetic field distribution cloud map of the coil winding; based on the magnetic field distribution cloud map, determining the leakage magnetic flux distribution on the coil winding.

[0077] Among them, the preset excitation parameters refer to a series of parameters set in advance according to the actual operating conditions or design requirements of the reactor corresponding to the reactor model before simulating the operation of the reactor model, and are used to describe the excitation conditions applied to the reactor model. The preset excitation parameters include but are not limited to the magnitude of the current, frequency, waveform, and the amplitude and phase of the voltage, etc. Among them, the preset excitation parameter in this embodiment is mainly the current loaded on the coil winding. However, it can be understood that in some other embodiments, according to the purpose of the simulation operation, the preset excitation parameter can also be other parameters such as voltage.

[0078] Among them, applying an excitation to the coil winding means applying preset excitation parameters to the coil winding to make the reactor model operate in a simulation environment.

[0079] Among them, the magnetic field distribution nephogram refers to a graph used to display the magnetic field distribution in the reactor model. Usually, the magnitude of the magnetic field intensity is represented by colors or gray levels, which can intuitively display the magnetic field distribution inside the reactor model, facilitating the understanding and analysis of the electromagnetic characteristics of the reactor model. Through the magnetic field distribution nephogram, it is convenient to identify the regions with higher magnetic field intensity and potential magnetic leakage regions.

[0080] Exemplarily, the server, according to the simulated operating conditions of the reactor model, applies a corresponding excitation to the coil winding in the reactor model according to the preset excitation parameters, makes the reactor model simulate and operate under the excitation of the excitation parameters, and uses simulation software to obtain the magnetic field distribution nephogram of the coil winding; subsequently, the server further determines the magnetic leakage distribution on the coil winding based on the magnetic field distribution nephogram.

[0081] In this embodiment, through the simulation operation of the reactor model, the electromagnetic field distribution of the reactor in actual operation can be accurately simulated, thus avoiding the possible errors and uncertainties in traditional design methods. Moreover, the magnetic field distribution nephogram obtained through simulation can intuitively display the magnetic field distribution inside the reactor, especially the magnetic leakage distribution on the coil winding, so as to adjust the structural parameters and material properties of the reactor targeted to reduce magnetic leakage, improve the efficiency and safety of the reactor. Through multiple simulations, the optimal design scheme can be quickly found, improving the R & D efficiency. In addition, the simulation analysis can be completed on a computer without making a physical prototype for testing, thus greatly saving the R & D cost and time.

[0082] In one embodiment, as Figure 3 shown, before simulating the operation of the reactor model under a preset short-circuit condition, it further includes:

[0083] Step S301, perform geometric modeling on the reactor according to the structural parameters of the reactor to obtain a geometric model of the reactor.

[0084] Among them, the structural parameters of the reactor refer to the numerical values describing the physical shape and size of the reactor. The structural parameters of the reactor include but are not limited to the overall size of the reactor (such as length, width, height), the size of the coil winding (such as wire diameter, number of turns, winding method), the sizes of the upper yoke and the lower yoke, etc., so as to construct a reactor model matching the reactor.

[0085] Among them, geometric modeling refers to constructing the three-dimensional or two-dimensional geometric shape of the reactor according to the structural parameters of the reactor. Usually, the geometric modeling tools in CAD (Computer-Aided Design) software or simulation software can be used to complete it. In this embodiment, a finite element analysis software is used to model the reactor to obtain the corresponding geometric model of the reactor. Among them, according to the structure of the reactor, the geometric model of the reactor includes a tank model, an upper yoke model, a lower yoke model, and a coil winding model to accurately reflect the actual structure of the reactor.

[0086] Exemplarily, the server calls the finite element analysis software and constructs a tank model, an upper yoke model, a lower yoke model, and a coil winding model respectively according to the set structural parameters of the reactor to obtain the geometric model of the reactor.

[0087] Step S302: Add material properties to the geometric model according to the materials of the reactor to obtain an intermediate geometric model.

[0088] Among them, the materials of the reactor are used to describe the electrical performance and material properties of the reactor, such as the copper core of the wire of the coil winding of the reactor, the materials used for the outer insulation material, etc., to reflect the electrical parameters of the reactor and its coil winding wire, such as inductance, resistance, capacitance, loss, conductivity, magnetic permeability of magnetic materials, saturation magnetic induction intensity, resistivity, etc.

[0089] Among them, the material property refers to the quantitative description of the physical and mechanical properties of the material when modeling in the finite element analysis software, so that the constructed reactor model has the same properties and performance as the actual reactor.

[0090] Among them, the intermediate geometric model refers to the geometric model after adding material properties during the modeling process of the reactor, including an intermediate tank model, an intermediate upper yoke model, an intermediate lower yoke model, and an intermediate coil winding model. The intermediate geometric model contains the geometric shape and material property information of the reactor.

[0091] Exemplarily, the server adds the material quantities to the tank model, the upper yoke model, the lower yoke model, and the coil winding model respectively according to the set materials of the reactor to obtain an intermediate tank model, an intermediate upper yoke model, an intermediate lower yoke model, and an intermediate coil winding model, and obtain the intermediate geometric model.

[0092] Step S303: Configure boundary conditions and excitation sources for the coil winding model in the intermediate geometric model to obtain a reactor model.

[0093] Among them, the boundary conditions refer to the physical conditions on the boundary of the intermediate geometric model set for solving the electromagnetic field distribution during the simulation operation of the reactor model. The boundary conditions include, but are not limited to, the boundary conditions of the electromagnetic field (such as electric field strength, magnetic field strength, magnetic flux, etc.).

[0094] Among them, the excitation source refers to the current or voltage source applied during the simulation operation of the reactor model to simulate the working conditions of the reactor in actual operation; it is used to load the excitation on the coil winding model according to the preset excitation parameters.

[0095] Exemplarily, the server configures boundary conditions for the intermediate oil tank model, intermediate upper yoke model, intermediate lower yoke model, and intermediate coil winding model in the intermediate geometric model respectively, and configures an excitation source for the intermediate coil winding model to obtain the reactor model.

[0096] In this embodiment, by configuring accurate boundary conditions for the intermediate geometric model and configuring an excitation source for the coil winding model to obtain the final reactor model, the current and voltage conditions of the reactor in actual operation can be simulated, and then the accurate magnetic field distribution and physical characteristics can be obtained.

[0097] In one embodiment, based on the reactor model, leakage magnetic flux distribution, and preset short-circuit conditions, the leakage magnetic flux component of the outgoing wire of the coil winding is determined, and the simulated radial electrodynamic force of the outgoing wire is determined based on the leakage magnetic flux component, including:

[0098] Determine the position coordinates of the outgoing wire of the coil winding; based on the leakage magnetic flux distribution, extract the leakage magnetic flux component of the outgoing wire at the position coordinates; determine the simulated radial electrodynamic force of the outgoing wire according to the leakage magnetic flux component, preset excitation parameters, and the dimensional parameters of the coil winding.

[0099] Among them, the position coordinates of the outgoing wire refer to the coordinates of the outgoing wire in the coordinate system of the finite element analysis software, and this coordinate system is usually a Cartesian coordinate system. In this embodiment, since the outgoing wire has a certain radius, when determining the position coordinates, the center coordinate of the end face or cross section of the outgoing wire is used as the position coordinate of the outgoing wire, that is, the center point position coordinate of the outgoing wire. Of course, in some other embodiments, the position coordinate can also be selected as the coordinate of other positions on the end face or cross section of the outgoing wire. When the coil winding is wound by a single wire, the position coordinates of its outgoing wire are the position coordinates of the outgoing wire of the coil winding. When the coil winding is wound by two or more wires in parallel, the position coordinates of its outgoing wire are the position coordinates of the outgoing wire of the outermost coil winding.

[0100] Among them, according to the structure of the coil winding, the leakage magnetic components include axial leakage magnetic components and radial leakage magnetic components. The axial leakage magnetic component refers to the component obtained by decomposing the leakage magnetic along the axial direction of the coil winding; the radial leakage magnetic component refers to the component obtained by decomposing the leakage magnetic along the radial direction of the coil winding. Both the axial leakage magnetic component and the radial leakage magnetic component can be obtained through simulation by finite element analysis software.

[0101] Among them, the dimensional parameters of the coil winding mainly refer to the perimeter of the lead wire of the wire cake at the corresponding end of the coil winding.

[0102] Exemplarily, first, the server obtains the position coordinates of the center of the end face of the lead wire in the Cartesian coordinate system from the finite element analysis model according to the structural parameters of the reactor model during modeling, expressed as , where respectively represent the three directions of the Cartesian coordinate system.

[0103] Next, based on the obtained leakage magnetic distribution, the server extracts the axial leakage magnetic component and the radial leakage magnetic component at this position coordinate, and uses the leakage magnetic component at this position coordinate to represent the leakage magnetic component of this lead wire. Based on the left-hand rule, the simulated radial electrodynamic force received by the lead wire in the radial direction is obtained. Among them, the simulated radial electrodynamic force is expressed as:

[0104] (1)

[0105] Where is the radial tensile force received by the lead wire in the radial direction, represents the radial direction; is the axial leakage magnetic component of the lead wire, represents the axial direction; is the short-circuit current of the lead wire, that is, the current on the lead wire during short circuit when the reactor model operates under the excitation of preset excitation parameters; is the dimensional parameter of the coil winding.

[0106] In this embodiment, for the convenience of analysis, the dimensional parameter of the coil winding takes the perimeter of a quarter circle of the lead wire to prevent the tensile forces received by the lead wire in the corresponding directions from canceling each other out. Thus, the dimensional parameter of the coil winding is expressed as:

[0107] (2)

[0108] Where is the radius of the lead wire.

[0109] Based on this, when the reactor model is short-circuited, the simulated radial electrodynamic force received by a quarter circumference of the lead wire is expressed as:

[0110] (3)

[0111] In this embodiment, by determining the central point position coordinates of the leading wire in the coil winding, extracting the leakage magnetic component borne by the leading wire at this position coordinate, and finally using the leakage magnetic component, combining the preset excitation parameters and the size parameters of the coil winding, the radial electrodynamic force received by the leading wire in the radial direction can be accurately simulated and calculated. This not only considers the direct influence of the leakage magnetic field, but also comprehensively considers the influence of the excitation conditions and the winding structure on the distribution of the radial electrodynamic force, which is conducive to obtaining an accurate simulated radial electrodynamic force.

[0112] In one embodiment, the coil winding includes at least two disk windings stacked along the axial direction of the coil winding; the above method further includes:

[0113] According to the attribute parameters of the reactor model, determine the first frictional force between the target disk winding to which the leading wire belongs and the adjacent disk winding.

[0114] Among them, the attribute parameters refer to the parameters used to determine the frictional force between the target disk winding and the adjacent disk winding of the reactor model; the attribute parameters of this embodiment include the friction coefficient between the target disk winding and the adjacent disk winding and the axial pressing force when the leading wire is in a compressed state axially.

[0115] Among them, the target disk winding refers to the disk winding located at the first axial end or the second axial end of the coil winding, that is, the disk winding in contact with the upper yoke or the lower yoke, and the leading wire is led out from the target disk winding. The adjacent disk winding refers to the disk winding in contact with the target disk winding, and the two may be in direct contact or indirectly in contact through a spacer.

[0116] Among them, the friction coefficient between the target disk winding and the adjacent disk winding refers to a physical quantity that characterizes the magnitude of the frictional force between the two contact surfaces of the target disk winding and the adjacent disk winding in a compressed state, and this value depends on the material properties of the outer insulation layer of the wire of each disk winding. In some other embodiments, when there is a spacer between the target disk winding and the adjacent disk winding, the friction coefficient may also be the friction coefficient between the leading wire of the target disk winding and the spacer.

[0117] Among them, the axial pressing force when the leading wire is in a compressed state axially refers to the acting force when each disk winding is pressed axially in the axial direction of the coil winding and the disk windings are squeezed and in contact with each other axially, which is used to ensure the tight arrangement and fixation of the wires (including the leading wire) of each disk winding. In this embodiment, the axial pressing force is the axial pressing force received by a quarter circumference of the leading wire.

[0118] Among them, the first frictional force refers to the resistance generated when the contact surface between the target coil pancake and the adjacent coil pancake moves relatively or attempts to move relatively under the action of the radial pressing force. When the coil winding is in a compressed state under the action of the axial pressing force, the first frictional force between the outgoing conductor and the conductor of the adjacent coil pancake will prevent the outgoing conductor and the conductor of the adjacent coil pancake from moving under the action of the radial electromagnetic force, so as to prevent the deformation of the outgoing conductor.

[0119] Exemplarily, the server determines the first frictional force between the target coil pancake and the adjacent coil pancake to which the outgoing conductor belongs according to the friction coefficient between the target coil pancake and the adjacent coil pancake of the reactor model and the axial pressing force when the outgoing conductor is in a compressed state axially. The first frictional force is expressed as:

[0120] (4)

[0121] Among them, is the first frictional force, is the friction coefficient between the outgoing conductor of the target coil pancake and the conductor of the adjacent coil pancake or the friction coefficient between the outgoing conductor of the target coil pancake and the spacer, is the axial pressing force received by a quarter of the circumference of the outgoing conductor, which depends on the structural characteristics of the reactor model.

[0122] In this embodiment, determining the theoretical radial bearing force of the outgoing conductor based on the reactor model includes:

[0123] Determining the theoretical radial bearing force of the outgoing conductor based on the first frictional force.

[0124] Among them, in this case, no limiting structure is added to the outgoing conductor, and the force hindering the radial movement of the outgoing conductor is only the frictional force provided by the conductor or spacer of the adjacent coil pancake in contact with it. Therefore, the theoretical radial bearing force is the first frictional force.

[0125] Exemplarily, the server determines the first frictional force as the theoretical radial bearing force of the outgoing conductor, that is:

[0126] (5)

[0127] Among them, is the theoretical radial bearing force when no limiting structure is added to the outgoing conductor.

[0128] In this embodiment, by determining the attribute parameters of the reactor model, the first frictional force between the outgoing conductor of the target coil pancake and the conductor of the adjacent coil pancake can be accurately calculated, and then the theoretical radial bearing force can be obtained, providing a theoretical basis for the subsequent performance evaluation of the coil winding.

[0129] In one embodiment, the above method further includes:

[0130] Determine the second frictional force between the target wire cake and the adjacent wire cake based on the limiting force of the limiting structure between the target wire cake and the adjacent wire cake.

[0131] Among them, the limiting structure refers to the structure used to fix the target wire cake and the adjacent wire cake. The limiting structure can be a heat shrinkable tape, a pressing block, etc. to limit and fix the target wire cake and the adjacent wire cake; each limiting structure can be set selectively or simultaneously, specifically determined according to the requirement of how much frictional force is needed between the target wire cake and the adjacent wire cake to resist the radial electromagnetic force. The limiting force refers to the force used to prevent the target wire cake and the adjacent wire cake from separating or displacing.

[0132] Among them, the second frictional force refers to the resistance generated when the contact surface between the target wire cake and the adjacent wire cake moves relatively or attempts to move relatively under the action of the limiting force of the limiting structure. When the coil winding is in a compressed state under the action of the limiting force, the second frictional force between the leading-out wire and the wire of the adjacent wire cake is superimposed with the first frictional force to further prevent the leading-out wire and the wire of the adjacent wire cake from moving under the action of the radial electromagnetic force, thereby further preventing the leading-out wire from deforming. The determination method of the second frictional force is similar to that of the first frictional force.

[0133] Exemplarily, the server determines the second frictional force between the target wire cake to which the leading-out wire belongs and the adjacent wire cake according to the friction coefficient between the target wire cake and the adjacent wire cake of the reactor model and the limiting force provided by the limiting structure. The second frictional force is expressed as:

[0134] (6)

[0135] Among them, is the second frictional force, is the friction coefficient between the leading-out wire of the target wire cake and the wire of the adjacent wire cake or the friction coefficient between the leading-out wire of the target wire cake and the spacer block, is the limiting force received by a quarter of the circumference of the leading-out wire.

[0136] In this embodiment, determining the theoretical radial bearing capacity of the leading-out wire based on the reactor model includes:

[0137] Determine the theoretical radial bearing capacity of the leading-out wire based on the first frictional force and the second frictional force.

[0138] Among them, in this case, the leading-out wire is provided with a limiting structure, and the force that hinders the leading-out wire from moving radially is the resultant force after the superposition of the first frictional force and the second frictional force. Therefore, the theoretical radial bearing capacity is the resultant force of the first frictional force and the second frictional force.

[0139] Exemplarily, the server determines the resultant force of the first frictional force and the second frictional force as the theoretical radial bearing force of the extended conductor, that is:

[0140] (7)

[0141] wherein, is the theoretical radial bearing force when a limiting structure is added to the extended conductor.

[0142] In this embodiment, by determining the second frictional force of the extended conductor under the action of the limiting structure and according to the attribute parameters of the reactor model, the second frictional force between the extended conductor of the target coil turn and the conductors of adjacent coil turns can be accurately calculated, and then the theoretical radial bearing force with the action of the limiting structure can be obtained, providing a theoretical basis for the performance evaluation of the subsequent coil winding.

[0143] In one embodiment, based on the radial bearing capacity parameter, the evaluation result of the radial force performance of the coil winding is obtained, including:

[0144] Set a safety factor, compare the radial bearing capacity parameter with the safety factor to obtain a comparison result; determine the evaluation result of the radial force performance of the coil winding according to the comparison result.

[0145] wherein, the safety factor is a coefficient used to measure whether the axial bearing capacity parameter exceeds the range. The comparison result is the result of whether the radial bearing capacity parameter of the coil winding meets the requirements of the safety factor.

[0146] wherein, the radial bearing capacity parameter is expressed as:

[0147] (8)

[0148] wherein, is the radial bearing capacity parameter.

[0149] Exemplarily, set a safety factor, the server compares the radial bearing capacity parameter with the safety factor to obtain a comparison result. If the radial bearing capacity parameter is greater than or equal to the safety factor, it means that the radial electrodynamic force received by the extended conductor is within the range that the extended conductor can bear. If the radial bearing capacity parameter is less than the safety factor, it means that the radial electrodynamic force received by the extended conductor exceeds the range that the extended conductor can bear, and thus the evaluation result of the radial force performance of the coil winding is obtained.

[0150] In this embodiment, by setting a safety factor and comparing the determined radial bearing capacity parameter with the safety factor, it can be judged whether the radial electrodynamic force received by the extended conductor is within the range that it can bear, and the radial force performance of the coil winding can be quantitatively evaluated to improve the objectivity and accuracy of the performance evaluation.

[0151] In an application example, a method for evaluating the short-circuit performance of windings based on a reactor model is provided. By obtaining the leakage magnetic flux distribution under short-circuit current of the air-core reactor built in a power transformer, the axial leakage magnetic flux component at the winding end is obtained, and then the radial tensile force received by the conductor at the end is calculated and compared with the restraining force received by the end to evaluate the short-circuit withstand capacity of the conductor at the end. The specific steps are as follows:

[0152] Step 1: Modeling to determine the leakage magnetic flux distribution.

[0153] Based on the detailed design parameters of the air-core reactor, a three-dimensional CAD model of the reactor is established. As Figure 4 shown, the reactor includes a coil 401, an upper yoke 402, a lower yoke 403, and an oil tank 404. For the CAD model of the reactor, corresponding material parameters are loaded for each group of components, and corresponding excitation parameters are loaded for the coil 401. By simulating and solving the leakage magnetic flux distribution on the coil of the reactor under the corresponding operating conditions, as Figure 5 shown, it is the magnetic field distribution nephogram during the simulation operation of the reactor model, from which the leakage magnetic flux distribution can be obtained.

[0154] Step 2: Based on the leakage magnetic flux distribution, determine the axial leakage magnetic flux at the center point of the end conductor and calculate the radial tensile force of the 1 / 4 circle of the outermost conductor.

[0155] According to the design parameters of the reactor, the coordinate data of the center point of the conductor at the end of the coil is obtained. As Figure 6 shown. Figure (6a) is formed by a single conductor, and Figure (6b) is formed by radially parallel winding of multiple conductors. In the figure, it is the A-phase winding of the transformer. The center point coordinates of the end cake conductor are expressed as , where respectively represent the positions of the A-phase winding in three directions of the Cartesian coordinate system. A represents the A-phase winding; the same applies to the B-phase and C-phase windings.

[0156] Based on the solved leakage magnetic flux distribution, the axial leakage magnetic flux and radial leakage magnetic flux components at this coordinate data are extracted. The leakage magnetic flux components at this center point are used to represent the leakage magnetic flux components of this conductor.

[0157] The axial leakage magnetic flux component of the conductor is expressed as , represents the axial direction, and represents the radial direction. Based on the left-hand rule, the radial tensile force received by the end conductor is:

[0158] (9)

[0159] Where is the radial tensile force received by the end conductor in the radial direction, is the short-circuit current of the end conductor, To represent the length of 1 / 4 circumference of the protruding lead 1, as Figure 7 shown by the arrow in

[0160] The calculation method is as follows.

[0161] (10)

[0162] Among them, is the radius of the protruding lead, and this parameter can be obtained from the design parameters of the reactor.

[0163] In summary, the radial electromagnetic force on the 1 / 4 circumference of the protruding lead of the reactor during short circuit is:

[0164] (11)

[0165] Step 3: Calculate the ability of the protruding lead to withstand the radial force.

[0166] The ability of the actual reactor to withstand the radial force is mainly affected by the following factors:

[0167] (1) Wire friction force

[0168] The entire coil 401 of the built-in reactor is in an axially stressed and compressed state. The friction force between the wires will prevent the wires from moving under the action of the radial tensile force. The calculation of the friction force between the pancakes is as follows:

[0169] (12)

[0170] Among them, is the friction force between the pancakes; is the friction coefficient between the pancakes. Specifically, if there are spacers between the pancakes, it represents the friction coefficient between the spacers and the wires; if there are no spacers between the pancakes, it represents the friction coefficient between the pancakes. This value depends on the material properties of the outer insulation layer of the wire and the spacers; represents the axial compression force on the 1 / 4 circumference of the protruding lead at the end of the coil, which depends on the structural characteristics of the reactor.

[0171] (2) Heat shrinkable tape bundling

[0172] Adjacent pancakes are bundled with heat shrinkable tape to provide an additional axial force , and then generate a friction force , and the calculation method is the same as above.

[0173] (3) Other limiting measures

[0174] Provide the radial bearing capacity , and generate a friction force .

[0175] In summary, the ability of the leading wire to withstand the radial force at a 1 / 4 circumferential length is as follows:

[0176] (13)

[0177] Step 4: Compare the calculated radial electromagnetic force with the ability of the leading wire to withstand the radial force. According to the actual design scheme of the reactor, set the safety factor S, and compare and evaluate the ability of the leading wire of the reactor to withstand the radial force.

[0178] The evaluation scheme is as follows:

[0179] (14)

[0180] If > S, it means that the radial electromagnetic force on the leading wire of the reactor is within its bearing range;

[0181] If < S, it means that the radial electromagnetic force on the leading wire of the reactor exceeds its bearing capacity.

[0182] Based on the above, the present example has the following beneficial effects:

[0183] ① Based on the finite element simulation algorithm, calculate the leakage magnetic field distribution at the leading part of the reactor winding. Compared with the empirical formula, the calculation result of the leakage magnetic field is more accurate, so the radial electromagnetic force of the leading wire obtained is closer to the actual value;

[0184] ② The calculation method is applicable to various types of reactors and is not affected by factors such as winding type, size, leading type, and reactor design size. This evaluation method can be used to judge the radial short-circuit withstand ability of the leading wire of the reactor.

[0185] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps do not necessarily have to be executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages do not necessarily have to be executed at the same time, but can be executed at different times. The execution order of these steps or stages does not necessarily have to be sequential, but can be executed alternately or alternately with at least a part of the steps or stages in other steps or other steps.

[0186] Based on the same inventive concept, an embodiment of the present application further provides a winding short-circuit performance evaluation device based on a reactor model for implementing the above-mentioned winding short-circuit performance evaluation method based on a reactor model. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the winding short-circuit performance evaluation device based on a reactor model provided below can refer to the limitations on the winding short-circuit performance evaluation method based on a reactor model in the above text, and will not be repeated here.

[0187] In an exemplary embodiment, as Figure 8 shown, a winding short-circuit performance evaluation device based on a reactor model is provided, including: a simulation operation module 801, a first calculation module 802, a second calculation module 803, and a result evaluation module 804, where:

[0188] The simulation operation module 801 is used to simulate the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic flux distribution on the coil winding in the reactor model.

[0189] The first calculation module 802 is used to determine the leakage magnetic flux component of the end lead wire of the coil winding based on the preset short-circuit condition, the reactor model, and the leakage magnetic flux distribution, and determine the simulated radial electrodynamic force of the end lead wire based on the leakage magnetic flux component.

[0190] The second calculation module 803 is used to determine the theoretical radial bearing force of the end lead wire based on the reactor model.

[0191] The result evaluation module 804 is used to determine the radial bearing capacity parameter of the end lead wire according to the simulated radial electrodynamic force and the theoretical radial bearing force, and obtain the evaluation result of the radial force performance of the coil winding based on the radial bearing capacity parameter.

[0192] In an alternative embodiment, the simulation operation module 801 is further used to apply an excitation to the coil winding in the reactor model based on preset excitation parameters, so that the reactor model simulates and operates under the excitation to obtain the magnetic field distribution of the coil winding.

[0193] In an alternative embodiment, the above device further includes a model construction module, which is used to perform geometric modeling on the reactor according to the structural parameters of the reactor to obtain a geometric model of the reactor; add material properties to the geometric model according to the material of the reactor to obtain an intermediate geometric model; configure boundary conditions and excitation sources for the coil winding model in the intermediate geometric model to obtain a reactor model; the excitation source is used to apply an excitation to the coil winding model according to preset excitation parameters.

[0194] In an alternative embodiment, the first calculation module 802 is further configured to determine the position coordinates of the leading wire of the coil winding; extract the leakage magnetic component of the leading wire at the position coordinates based on the leakage magnetic distribution; and determine the simulated radial electrodynamic force of the leading wire according to the preset excitation parameters, the leakage magnetic component, and the dimensional parameters of the coil winding.

[0195] In an alternative embodiment, the coil winding includes at least two disk windings stacked along the axial direction of the coil winding. The above device further includes a first friction force calculation module, configured to determine a first friction force between the target disk winding to which the leading wire belongs and an adjacent disk winding according to the attribute parameters of the reactor model; the attribute parameters include the friction coefficient between the target disk winding and the adjacent disk winding and the axial pressing force when the leading wire is in a compressed state axially.

[0196] The second calculation module 803 is further configured to determine the theoretical radial bearing force of the leading wire based on the first friction force.

[0197] In an alternative embodiment, the above device further includes a second friction force calculation module, configured to determine a second friction force between the target disk winding and the adjacent disk winding based on the limiting acting force of the limiting structure between the target disk winding and the adjacent disk winding.

[0198] The second calculation module 803 is further configured to determine the theoretical radial bearing force of the leading wire based on the first friction force and the second friction force.

[0199] In an alternative embodiment, the result evaluation module 804 is further configured to set a safety factor, compare the radial bearing capacity parameter with the safety factor to obtain a comparison result; and determine the evaluation result of the radial force performance of the coil winding according to the comparison result.

[0200] Each module in the above device for evaluating the short-circuit performance of the winding based on the reactor model can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor in the computer device in hardware form or independent of it, or stored in the memory in the computer device in software form, so as to facilitate the processor to call and execute the operations corresponding to the above modules.

[0201] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as Figure 9As shown in the figure. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as excitation parameters, structural parameters, materials, electrical parameters, and dimensional parameters of the reactor. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a method for evaluating the winding short-circuit performance based on a reactor model.

[0202] Those skilled in the art can understand that Figure 9 the structure shown in the figure is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0203] In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements the method for evaluating the winding short-circuit performance based on a reactor model in the above embodiment.

[0204] In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, it implements the method for evaluating the winding short-circuit performance based on a reactor model in the above embodiment.

[0205] In an embodiment, a computer program product is provided, including a computer program. When the computer program is executed by the processor, it implements the method for evaluating the winding short-circuit performance based on a reactor model in the above embodiment.

[0206] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0207] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present 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), magnetoresistive 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 be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., without limitation.

[0208] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered to be within the scope recorded in the present application.

[0209] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A method for evaluating winding short-circuit performance based on a reactor model, characterized in that: The method comprises: Simulating the operation of the reactor model under a preset short-circuit condition to obtain a leakage magnetic field distribution on the coil winding in the reactor model; Determine the position coordinates of the lead wire of the coil winding based on the preset short-circuit working condition, the reactor model and the leakage magnetic distribution; extract the leakage magnetic component of the lead wire at the position coordinates based on the leakage magnetic distribution; determine the simulated radial electromotive force of the lead wire according to the preset excitation parameters, the leakage magnetic component and the size parameters of the coil winding; Determining the theoretical radial bearing capacity of the lead-out conductor based on the reactor model; Determine the radial bearing capacity parameter of the lead wire according to the simulated radial electromotive force and the theoretical radial bearing force, and obtain the radial force bearing performance evaluation result of the coil winding based on the radial bearing capacity parameter; The coil winding comprises at least two coils stacked in the axial direction of the coil winding; the method further comprises: Determine a first friction force between a target coil to which the lead-out conductor belongs and an adjacent coil according to the property parameters of the reactor model; the property parameters include a friction coefficient between the target coil and the adjacent coil and an axial compression force when the lead-out conductor is in a compressed state in the axial direction; Determine a second friction force between the target wire coil and the adjacent wire coil based on a limiting force of a limiting structure between the target wire coil and the adjacent wire coil; Wherein, determining the theoretical radial bearing capacity of the lead-out conductor based on the reactor model includes: The theoretical radial bearing capacity of the lead wire is determined based on the first friction force; or the theoretical radial bearing capacity of the lead wire is determined based on the first friction force and the second friction force.

2. The method according to claim 1, characterized in that The operation of the reactor model is simulated under a preset short-circuit condition to obtain the leakage magnetic distribution on the coil winding in the reactor model, including: Based on preset excitation parameters, an excitation is loaded on the coil winding in the reactor model, so that the reactor model is simulated and operated under the excitation to obtain the magnetic field distribution of the coil winding.

3. The method according to claim 2, characterized in that Before simulating the operation of the reactor model under the preset short-circuit condition, the method further includes: Performing geometric modeling on the reactor according to the structural parameters of the reactor to obtain a geometric model of the reactor; Adding material properties to the geometric model according to the material of the reactor to obtain an intermediate geometric model; Boundary conditions and excitation sources are configured for the coil winding model in the intermediate geometric model to obtain a reactor model; the excitation source is used to load excitation on the coil winding model according to preset excitation parameters.

4. The method according to any one of claims 1 to 3, characterized in that The obtaining of the radial force performance evaluation result of the coil winding based on the radial bearing capacity parameter includes: Setting a safety factor, comparing the radial bearing capacity parameter with the safety factor, and obtaining a comparison result; The radial force performance evaluation result of the coil winding is determined according to the comparison result.

5. A winding short-circuit performance evaluation device based on a reactor model, characterized in that: The device comprises: A simulation operation module, used to simulate the operation of the reactor model under a preset short-circuit condition to obtain the leakage magnetic distribution on the coil winding in the reactor model; A first calculation module is used to determine the position coordinates of the lead wire of the coil winding based on the preset short-circuit working condition, the reactor model and the leakage magnetic distribution; extract the leakage magnetic component of the lead wire at the position coordinates based on the leakage magnetic distribution; and determine the simulated radial electromotive force of the lead wire according to the preset excitation parameters, the leakage magnetic component and the size parameters of the coil winding; A second calculation module is used to determine the theoretical radial bearing capacity of the lead wire based on the reactor model; A result evaluation module, used to determine the radial bearing capacity parameter of the lead wire according to the simulated radial electromotive force and the theoretical radial bearing force, and obtain the radial force performance evaluation result of the coil winding based on the radial bearing capacity parameter; The coil winding includes at least two coils stacked in the axial direction of the coil winding; the device also includes: A first friction force calculation module is used to determine a first friction force between a target coil to which the lead-out conductor belongs and an adjacent coil according to attribute parameters of the reactor model; the attribute parameters include a friction coefficient between the target coil and the adjacent coil and an axial compression force when the lead-out conductor is in a compressed state in the axial direction; A second friction force calculation module, used to determine a second friction force between the target wire coil and the adjacent wire coil based on a limiting force of a limiting structure between the target wire coil and the adjacent wire coil; The second calculation module is further used to determine the theoretical radial bearing capacity of the lead-out conductor based on the first friction force, or to determine the theoretical radial bearing capacity of the lead-out conductor based on the first friction force and the second friction force.

6. The device according to claim 5, characterized in that The simulation operation module is also used to load excitation on the coil winding in the reactor model based on preset excitation parameters, so that the reactor model can be simulated and run under the excitation to obtain the magnetic field distribution of the coil winding.

7. The device according to claim 6, characterized in that The device also includes: A model building module is used to geometrically model the reactor according to the structural parameters of the reactor to obtain the geometric model of the reactor; add material properties to the geometric model according to the material of the reactor to obtain an intermediate geometric model; configure boundary conditions and excitation sources for the coil winding model in the intermediate geometric model to obtain the reactor model; the excitation source is used to load excitation on the coil winding model according to preset excitation parameters.

8. The device according to any one of claims 5 to 7, characterized in that The result evaluation module is also used to set a safety factor, compare the radial bearing capacity parameter with the safety factor to obtain a comparison result; and determine the radial force performance evaluation result of the coil winding according to the comparison result.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

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

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