Method and device for determining winding eddy current loss of power transformer and computer equipment

Abstract

The invention relates to a winding eddy current loss determination method and device of a power transformer, computer equipment, a storage medium and a computer program product. The method comprises the following steps: constructing a digital three-dimensional model for the power transformer; simulating the digital three-dimensional model to obtain the magnetic flux leakage distribution condition of any winding of the power transformer under each operation condition; based on the magnetic flux leakage distribution condition of any winding, determining an axial magnetic flux leakage component and a radial magnetic flux leakage component corresponding to each wire in any winding; according to the axial magnetic flux leakage component and the radial magnetic flux leakage component corresponding to each wire in any winding, eddy current loss information caused by the axial magnetic flux leakage component and the radial magnetic flux leakage component of each wire in any winding is determined; and determining the eddy current loss information of any winding according to the eddy current loss information caused by the axial magnetic flux leakage component and the radial magnetic flux leakage component of each wire in any winding. By adopting the method, the winding eddy-current loss of the power transformer can be accurately determined.

Description

Technical Field

[0001] The present application relates to the technical field of power systems, and in particular to a method, device, computer equipment, storage medium and computer program product for determining winding eddy current losses of a power transformer. Background Art

[0002] The power transformer is the core equipment for transmitting energy in the power grid. When operating under load, the power transformer conductor is in the leakage magnetic field, which will induce an electric potential inside the conductor and generate eddy current. The resistance loss generated when the eddy current flows is the eddy current loss of the conductor.

[0003] At present, in the calculation method of the eddy current loss of the winding of the power transformer, the magnetic flux density B of the oil channel gap is first calculated by the formula m , and assuming that the magnetic flux density of the winding from the inside to the position is B m When the magnetic flux density drops to zero, the magnetic flux density is linearly distributed, and then the loss density per unit mass is calculated and multiplied by the mass of the winding to obtain the eddy current loss value of the entire winding. However, this calculation method ignores the leakage magnetic distribution characteristics of the entire winding, the calculation accuracy is poor, and B m The calculation formula is based on empirical coefficients and deviates from the peak magnetic density under the actual operating conditions of the transformer.

[0004] Therefore, there is a problem in the conventional technology that the eddy current loss of the power transformer cannot be accurately determined. Summary of the invention

[0005] Based on this, it is necessary to provide a method, device, computer equipment, computer-readable storage medium and computer program product for determining the eddy current loss of the winding of a power transformer, which can accurately determine the eddy current loss of the power transformer, in order to address the above technical problems.

[0006] A method for determining winding eddy current loss of a power transformer, comprising:

[0007] Construct a digital 3D model for power transformers;

[0008] By simulating the digital three-dimensional model, the leakage magnetic distribution of any winding of the power transformer under various operating conditions can be obtained;

[0009] Based on the magnetic flux leakage distribution of any winding, determine the axial magnetic flux leakage component and radial magnetic flux leakage component corresponding to each conductor in any winding;

[0010] According to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each conductor in any winding, the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding is determined;

[0011] The eddy current loss information of any winding is determined according to the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding.

[0012] In an exemplary embodiment, constructing a digital three-dimensional model for a power transformer includes:

[0013] Obtaining three-dimensional model parameters of power transformer;

[0014] Based on the three-dimensional model parameters of the power transformer, a digital three-dimensional model of the power transformer is constructed.

[0015] In an exemplary embodiment, the three-dimensional model parameters include three-dimensional structural parameters corresponding to each component in the power transformer. Based on the three-dimensional model parameters of the power transformer, a digital three-dimensional model for the power transformer is constructed, including:

[0016] Based on the three-dimensional structural parameters corresponding to the components in the power transformer, a three-dimensional structural model corresponding to the components in the power transformer is generated;

[0017] A digital three-dimensional model of the power transformer is generated according to the three-dimensional structural models corresponding to the components in the power transformer.

[0018] In an exemplary embodiment, based on the magnetic leakage distribution of any winding, determining the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any winding includes:

[0019] According to the three-dimensional model parameters of the power transformer, the coordinates of the center point of the center section of each conductor in any winding are determined;

[0020] Based on the magnetic flux leakage distribution of any winding, the axial magnetic flux leakage component and the radial magnetic flux leakage component corresponding to the coordinates of the center point of the central cross section of each conductor in any winding are extracted;

[0021] The axial magnetic leakage component and the radial magnetic leakage component corresponding to the coordinates of the central point of the central cross section of each conductor in any winding are taken as the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding.

[0022] In an exemplary embodiment, according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any winding, determining the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each wire in any winding, respectively, includes:

[0023] The axial magnetic leakage component corresponding to each conductor in any winding is input into the axial eddy current loss determination model to obtain the eddy current loss information caused by the axial magnetic leakage component of each conductor in any winding, and the radial magnetic leakage component corresponding to each conductor in any winding is input into the radial eddy current loss determination model to obtain the eddy current loss information caused by the radial magnetic leakage component of each conductor in any winding.

[0024] In an exemplary embodiment, according to the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding, the eddy current loss information of any winding is determined, including:

[0025] The eddy current loss information caused by the axial magnetic leakage component of each conductor in any winding is superimposed to obtain the eddy current loss information caused by the axial magnetic leakage component of any winding, and the eddy current loss information caused by the radial magnetic leakage component of each conductor in any winding is superimposed to obtain the eddy current loss information caused by the radial magnetic leakage component of any winding;

[0026] The eddy current loss information of any winding is determined according to the eddy current loss information caused by the axial magnetic leakage component and the eddy current loss information caused by the radial magnetic leakage component of any winding.

[0027] A device for determining winding eddy current loss of a power transformer, comprising:

[0028] A construction module for constructing a digital three-dimensional model of a power transformer;

[0029] A simulation module is used to obtain the leakage magnetic distribution of any winding of the power transformer under various operating conditions by simulating the digital three-dimensional model;

[0030] A first determination module is used to determine the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any winding based on the magnetic leakage distribution of any winding;

[0031] A second determination module is used to determine eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each conductor in any winding;

[0032] The third determination module is used to determine the eddy current loss information of any winding according to the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding.

[0033] A computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0034] A computer-readable storage medium stores a computer program, which implements the steps of the above method when executed by a processor.

[0035] A computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0036] The above-mentioned method, device, computer equipment, storage medium and computer program product for determining the winding eddy current loss of the power transformer construct a digital three-dimensional model for the power transformer; obtain the leakage magnetic distribution of any winding of the power transformer under various operating conditions by simulating the digital three-dimensional model; based on the leakage magnetic distribution of any winding, determine the axial leakage magnetic component and radial leakage magnetic component corresponding to each conductor in any winding; according to the axial leakage magnetic component and radial leakage magnetic component corresponding to each conductor in any winding, determine the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding; according to The eddy current loss information of any winding is determined by the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding; in this way, the leakage magnetic distribution of the power transformer winding can be obtained by simulation, and a more accurate leakage magnetic field can be calculated compared with the traditional technology of determining the leakage magnetic distribution based on the empirical formula, so as to obtain the winding eddy current loss that is closer to the actual situation. Furthermore, since the eddy current loss of the winding caused by the radial leakage magnetic component and the axial leakage magnetic component of the winding is taken into account, it is beneficial to determine the measures to reduce the eddy current loss of the winding in a more targeted manner in the future, thereby helping to extend the service life of the power transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] FIG1 is a diagram showing an application environment of a method for determining winding eddy current loss of a power transformer in one embodiment;

[0039] Figure 2 A schematic diagram of a flow chart of a method for determining winding eddy current loss of a power transformer in one embodiment;

[0040] Figure 3 A schematic diagram of a flow chart of steps for constructing a digital three-dimensional model of a power transformer in one embodiment;

[0041] Figure 4 A schematic diagram of building a CAD model of a power transformer in one embodiment;

[0042] Figure 5 A schematic diagram of magnetic leakage distribution on a power transformer winding in one embodiment;

[0043] Figure 6 A schematic diagram of extracting the coordinates of the center point of the center cross section of a conductor of a power transformer in another embodiment;

[0044] Figure 7 is a flow chart of a method for determining winding eddy current loss of a power transformer in one embodiment;

[0045] Figure 8 A schematic flow chart of a method for determining winding eddy current loss of a power transformer in another embodiment;

[0046] Fig. 9 A structural block diagram of a device for determining winding eddy current loss of a power transformer in one embodiment;

[0047] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] The method for determining the eddy current loss of the winding of the power transformer provided in the embodiment of the present application can be applied to the application environment shown in Figure 1. 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 it can be placed on the cloud or other network servers. The server 104 constructs a digital three-dimensional model for the power transformer; the server 104 obtains the leakage magnetic distribution of any winding of the power transformer under various operating conditions by simulating the digital three-dimensional model; the server 104 determines the axial leakage magnetic component and radial leakage magnetic component corresponding to each wire in any winding based on the leakage magnetic distribution of any winding; the server 104 determines the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each wire in any winding according to the axial leakage magnetic component and the radial leakage magnetic component corresponding to each wire in any winding; the server 104 determines the eddy current loss information of any winding according to the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each wire in any winding. The terminal 102 may be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, IoT devices, and portable wearable devices. The IoT devices may be smart speakers, smart TVs, smart air conditioners, smart car-mounted devices, etc. The portable wearable devices may be smart watches, smart bracelets, head-mounted devices, etc. The server 104 may be implemented as an independent server or a server cluster consisting of multiple servers.

[0050] In an exemplary embodiment, Figure 2 As shown, a method for determining the eddy current loss of a winding of a power transformer is provided, and the method is applied to the server 104 in FIG. 1 as an example for description, including the following steps 202 to 206. Among them:

[0051] Step 202: construct a digital three-dimensional model for the power transformer.

[0052] The digital three-dimensional model for the power transformer may refer to a simulation model of the power transformer constructed in simulation software, for example, a CAD model of the power transformer.

[0053] Optionally, the server constructs a digital three-dimensional model of the power transformer in simulation software, and subsequently performs finite element simulation.

[0054] Step 204, simulating the digital three-dimensional model to obtain the magnetic flux leakage distribution of any winding of the power transformer under various operating conditions.

[0055] The magnetic leakage distribution of the winding may refer to the distribution of the magnetic field inside the winding.

[0056] Optionally, the server performs finite element simulation on the digital three-dimensional model in simulation software to obtain the leakage magnetic distribution of any winding of the power transformer under various operating conditions.

[0057] Step 206: Based on the magnetic flux leakage distribution of any winding, determine the axial magnetic flux leakage component and the radial magnetic flux leakage component corresponding to each wire in any winding.

[0058] Optionally, the server determines the axial leakage magnetic component and radial leakage magnetic component corresponding to each wire in the winding based on the leakage magnetic distribution of the winding, that is, determines the axial leakage magnetic component and radial leakage magnetic component corresponding to each coil in the winding.

[0059] Step 208, according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any winding, determine the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each wire in any winding.

[0060] Optionally, the server determines the eddy current loss value caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in the winding, respectively, according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each conductor in the winding.

[0061] Step 210, determining the eddy current loss information of any winding according to the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding.

[0062] Optionally, the server determines the eddy current loss value of the winding according to the eddy current loss value caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in the winding.

[0063] In the above-mentioned method for determining the eddy current loss of the winding of the power transformer, a digital three-dimensional model for the power transformer is constructed; the digital three-dimensional model is simulated to obtain the leakage magnetic distribution of any winding of the power transformer under various operating conditions; based on the leakage magnetic distribution of any winding, the axial leakage magnetic component and the radial leakage magnetic component corresponding to each conductor in any winding are determined; according to the axial leakage magnetic component and the radial leakage magnetic component corresponding to each conductor in any winding, the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding is determined; according to the axial leakage magnetic component and the radial leakage magnetic component corresponding to each conductor in any winding, the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding is determined; The eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component is used to determine the eddy current loss information of any winding; in this way, the leakage magnetic distribution of the power transformer winding can be obtained by simulation, and a more accurate leakage magnetic field can be calculated compared with the traditional technology of determining the leakage magnetic distribution based on the empirical formula, so as to obtain the winding eddy current loss that is closer to the actual situation. Furthermore, since the winding eddy current loss caused by the radial leakage magnetic component and the axial leakage magnetic component of the winding is taken into account, it is beneficial to determine the measures to reduce the winding eddy current loss in a more targeted manner in the future, thereby helping to extend the operating life of the power transformer.

[0064] In an exemplary embodiment, Figure 3 As shown, step 202 includes steps 302 to 304. Among them:

[0065] Step 302: Acquire the three-dimensional model parameters of the power transformer.

[0066] The three-dimensional model parameters of the power transformer may refer to design parameters of the power transformer.

[0067] Optionally, the server obtains design parameters of the power transformer.

[0068] Step 304: construct a digital three-dimensional model for the power transformer based on the three-dimensional model parameters of the power transformer.

[0069] Optionally, the server constructs a digital three-dimensional model for the power transformer in the simulation software based on the three-dimensional model parameters of the power transformer.

[0070] In this embodiment, by acquiring the three-dimensional model parameters of the power transformer, a digital three-dimensional model of the power transformer is constructed based on the three-dimensional model parameters of the power transformer. In this way, the digital three-dimensional model of the power transformer can be accurately constructed, which is conducive to the subsequent acquisition of more accurate simulation data.

[0071] In an exemplary embodiment, the three-dimensional model parameters include three-dimensional structural parameters corresponding to each component in the power transformer. Based on the three-dimensional model parameters of the power transformer, a digital three-dimensional model for the power transformer is constructed, including: based on the three-dimensional structural parameters corresponding to each component in the power transformer, generating a three-dimensional structural model corresponding to each component in the power transformer; based on the three-dimensional structural model corresponding to each component in the power transformer, generating a digital three-dimensional model for the power transformer.

[0072] Among them, the components of the power transformer may include iron core, coil, pull plate clamp, magnetic shield, oil tank and other structures.

[0073] The three-dimensional structural parameters corresponding to the components may refer to the design parameters corresponding to structures such as the iron core, the coil, the pull plate clamp, the magnetic shield, and the oil tank.

[0074] The three-dimensional structural model corresponding to the component may refer to the three-dimensional models corresponding to structures such as the iron core, the coil, the pull plate clamp, the magnetic shield, and the oil tank.

[0075] Optionally, the server generates a three-dimensional structural model corresponding to each component of the power transformer in the simulation software based on the three-dimensional structural parameters corresponding to each component in the power transformer, and then generates a digital three-dimensional model for the power transformer in the simulation software based on the three-dimensional structural model corresponding to each component in the power transformer.

[0076] In practical applications, it is necessary to build a three-dimensional refined model of the power transformer based on the detailed design parameters of the power transformer, including the core, coil, plate clamp, magnetic shield, oil tank and other structures. Figure 4 For the transformer CAD model, the corresponding material parameters are loaded for each component, the corresponding excitation parameters are loaded for the coil, and then the leakage magnetic distribution on the power transformer winding under the corresponding operating conditions is solved through simulation, as shown in Figure 5 shown.

[0077] In this embodiment, a three-dimensional structural model corresponding to each component in the power transformer is generated based on the three-dimensional structural parameters corresponding to each component in the power transformer. A digital three-dimensional model for the power transformer is generated according to the three-dimensional structural model corresponding to each component in the power transformer. This can construct a refined three-dimensional structural model of each component of the power transformer, which is conducive to constructing a more accurate digital three-dimensional model, and further facilitates the subsequent acquisition of more accurate simulation data.

[0078] In an exemplary embodiment, based on the leakage magnetic distribution of any winding, the axial leakage magnetic component and radial leakage magnetic component corresponding to each conductor in any winding are determined, including: determining the coordinates of the center point of the central cross-section of each conductor in any winding according to the three-dimensional model parameters of the power transformer; based on the leakage magnetic distribution of any winding, extracting the axial leakage magnetic component and radial leakage magnetic component corresponding to the coordinates of the center point of the central cross-section of each conductor in any winding; using the axial leakage magnetic component and radial leakage magnetic component corresponding to the coordinates of the center point of the central cross-section of each conductor in any winding as the axial leakage magnetic component and radial leakage magnetic component of each conductor in any winding.

[0079] The coordinates of the center point of the central cross section of any conductor in any winding may refer to the coordinates corresponding to the center of the central cross section of any conductor in the winding.

[0080] Optionally, the server obtains the coordinate data of the center point on the center section of each conductor in any winding according to the three-dimensional model parameters of the power transformer, i.e., the design parameters, such as Figure 6 As shown, the server extracts the axial leakage magnetic component and radial leakage magnetic component of each center point based on the leakage magnetic distribution of any winding obtained by solving, and uses the axial leakage magnetic component and radial leakage magnetic component of the center point of the central cross-section of each conductor in any winding as the axial leakage magnetic component and radial leakage magnetic component of each conductor in any winding.

[0081] In practical applications, it is necessary to obtain the coordinate data of the center point on the center section of each conductor of the winding according to the detailed design parameters of the power transformer, such as Figure 6 shown. Figure 6 The vertical core window section of the power transformer A phase is shown in the figure. The same is true for phases B and C. The coordinates of the center point of each coil are expressed as (x ALi ,y ALi, z ALi ), where x, y, and z represent the three directions of the Cartesian coordinate system, A represents the A-phase winding, B represents the B-phase winding, C represents the C-phase winding, and L represents the low-voltage winding. Similarly, H, M, and T represent the high-voltage winding, the medium-voltage winding, and the voltage regulating winding, respectively. i represents the i-th winding from the top to the bottom. Figure 6 The low-voltage winding has n cakes in total, and the high-voltage winding has m cakes in total. Based on the leakage magnetic distribution obtained by the previous simulation, the axial leakage magnetic component and radial leakage magnetic component under the coordinate data of the center point on the center section of the conductor are extracted, and the leakage magnetic component of the center point on the center section of the conductor represents the leakage magnetic component of the conductor. In addition, the radial leakage magnetic component of each conductor of the high-voltage winding can be expressed as B rHi The axial leakage magnetic component of each conductor of the high-voltage winding can be expressed as B zHi The radial leakage magnetic component of each conductor of the low-voltage winding can be expressed as B rLi The axial leakage magnetic component of each conductor of the low-voltage winding can be expressed as B zLi , r represents the radial direction, and z represents the axial direction.

[0082] In this embodiment, the coordinates of the center point of the central cross section of each conductor in any winding are determined according to the three-dimensional model parameters of the power transformer; based on the leakage magnetic distribution of any winding, the axial leakage magnetic component and the radial leakage magnetic component corresponding to the coordinates of the center point of the central cross section of each conductor in any winding are extracted; the axial leakage magnetic component and the radial leakage magnetic component corresponding to the coordinates of the center point of the central cross section of each conductor in any winding are used as the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding; in this way, the axial leakage magnetic component and the radial leakage magnetic component corresponding to the coordinates of the center point of the central cross section of the conductor can be directly used as the axial leakage magnetic component and the radial leakage magnetic component of the conductor, so that the axial leakage magnetic component and the radial leakage magnetic component corresponding to each conductor of each winding can be accurately determined.

[0083] In an exemplary embodiment, according to the axial leakage magnetic component and the radial leakage magnetic component corresponding to each conductor in any winding, the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding is determined, including: inputting the axial leakage magnetic component corresponding to each conductor in any winding into the axial eddy current loss determination model to obtain the eddy current loss information caused by the axial leakage magnetic component of each conductor in any winding, and inputting the radial leakage magnetic component corresponding to each conductor in any winding into the radial eddy current loss determination model to obtain the eddy current loss information caused by the radial leakage magnetic component of each conductor in any winding.

[0084] Optionally, the server inputs the axial magnetic leakage component corresponding to each conductor in any winding into the axial eddy current loss determination model to obtain the eddy current loss value caused by the axial magnetic leakage component for each conductor in any winding, and the server inputs the radial magnetic leakage component corresponding to each conductor in any winding into the radial eddy current loss determination model to obtain the eddy current loss value caused by the radial magnetic leakage component for each conductor in any winding.

[0085] In practical applications, the eddy current loss determination model can be expressed as:

[0086] ;

[0087] Among them, K e is the eddy current coefficient, the value of which depends on the properties of the magnetic material; B m is the maximum value of magnetic flux density, in Wb / m2; t is the thickness of the lamination, in m; f is the reversal frequency of the magnetic field, in H z ; V is the volume of the magnetic material, in m 3 .

[0088] By bringing the axial magnetic leakage component and the radial magnetic leakage component into the eddy current loss determination model, the eddy current loss caused by the axial magnetic leakage component and the radial magnetic leakage component of each winding and each conductor can be obtained. Among them, the eddy current loss power caused by the radial magnetic leakage component of each conductor of the high-voltage winding can be expressed as P rHi ; The eddy current loss power caused by the axial leakage magnetic component of each conductor of the high-voltage winding can be expressed as P zHi ; The eddy current loss power caused by the radial leakage magnetic component of each conductor of the low-voltage winding can be expressed as P rLi ; The eddy current loss power caused by the axial leakage magnetic component of each conductor of the low-voltage winding can be expressed as P zLi .

[0089] In this embodiment, by inputting the axial magnetic leakage component corresponding to each conductor in any winding into the axial eddy current loss determination model, the eddy current loss information caused by the axial magnetic leakage component of each conductor in any winding is obtained, and by inputting the radial magnetic leakage component corresponding to each conductor in any winding into the radial eddy current loss determination model, the eddy current loss information caused by the radial magnetic leakage component of each conductor in any winding is obtained, so that the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of the conductor can be accurately determined.

[0090] In an exemplary embodiment, the eddy current loss information of any winding is determined based on the eddy current loss information caused by the axial leakage magnetic component and the radial leakage magnetic component of each conductor in any winding, including: superimposing the eddy current loss information caused by the axial leakage magnetic component of each conductor in any winding to obtain the eddy current loss information caused by the axial leakage magnetic component of any winding, and superimposing the eddy current loss information caused by the radial leakage magnetic component of each conductor in any winding to obtain the eddy current loss information caused by the radial leakage magnetic component of any winding; determining the eddy current loss information of any winding based on the eddy current loss information caused by the axial leakage magnetic component and the eddy current loss information caused by the radial leakage magnetic component of any winding.

[0091] Optionally, the server superimposes the eddy current loss values ​​caused by the axial leakage magnetic component of each wire in any winding to obtain the eddy current loss value caused by the axial leakage magnetic component of any winding, and the server superimposes the eddy current loss values ​​caused by the radial leakage magnetic component of each wire in any winding to obtain the eddy current loss value caused by the radial leakage magnetic component of any winding. The server then determines the eddy current loss value of any winding based on the eddy current loss value caused by the axial leakage magnetic component and the eddy current loss value caused by the radial leakage magnetic component of any winding.

[0092] In practical applications, the eddy current loss values ​​of each conductor in the winding are superimposed to obtain the eddy current loss of the entire winding, and the eddy current loss of the entire winding is distinguished from the eddy current loss caused by radial magnetic leakage and axial magnetic leakage. Among them: the eddy current loss power caused by the radial magnetic leakage component of the high-voltage winding can be expressed as: ; The eddy current loss power caused by the axial leakage magnetic component of the high-voltage winding can be expressed as: ; The eddy current loss power caused by the radial leakage magnetic component of the low-voltage winding can be expressed as: ; The eddy current loss power caused by the axial leakage magnetic component of the low-voltage winding can be expressed as: .

[0093] In this embodiment, the eddy current loss information caused by the axial leakage magnetic component of each conductor in any winding is superimposed to obtain the eddy current loss information caused by the axial leakage magnetic component of any winding, and the eddy current loss information caused by the radial leakage magnetic component of each conductor in any winding is superimposed to obtain the eddy current loss information caused by the radial leakage magnetic component of any winding; according to the eddy current loss information caused by the axial leakage magnetic component of any winding and the eddy current loss information caused by the radial leakage magnetic component, the eddy current loss information of any winding is determined, and the eddy current losses caused by the axial leakage magnetic component and the radial leakage magnetic component of the winding respectively can be accurately determined.

[0094] In order to facilitate the understanding of those skilled in the art, Figure 7 A flow chart of a method for determining the eddy current loss of a power transformer winding is also exemplified, the method specifically comprising: establishing a CAD model for the power transformer based on the design scheme of the power transformer; determining the distribution of winding leakage flux; extracting the axial leakage flux component and radial leakage flux component of each conductor based on the coordinates of the center point of the central cross-section of each conductor of the winding; calculating the eddy current loss caused by the axial leakage flux and radial leakage flux of each conductor of each winding respectively; and superimposing the eddy current losses of each conductor in the same direction of the same winding to obtain the eddy current loss of the winding.

[0095] In another embodiment, Figure 8 As shown, a method for determining the eddy current loss of a winding of a power transformer is provided, and the method is applied to the server 104 in FIG. 1 as an example for description, and includes the following steps:

[0096] Step S802, obtaining three-dimensional model parameters of the power transformer.

[0097] Step S804: constructing a digital three-dimensional model of the power transformer based on the three-dimensional model parameters of the power transformer.

[0098] Step S806: construct a digital three-dimensional model for the power transformer.

[0099] Step S808, obtaining the magnetic flux leakage distribution of any winding of the power transformer under various operating conditions by simulating the digital three-dimensional model.

[0100] Step S810, determining the coordinates of the center point of the center section of each conductor in any winding according to the three-dimensional model parameters of the power transformer.

[0101] Step S812: based on the magnetic flux leakage distribution of any winding, extract the axial magnetic flux leakage component and the radial magnetic flux leakage component corresponding to the coordinates of the center point of the central cross section of each conductor in any winding.

[0102] Step S814: taking the axial magnetic leakage component and the radial magnetic leakage component corresponding to the coordinates of the center point of the central cross section of each conductor in any winding as the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding.

[0103] Step S816, determining eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each conductor in any winding.

[0104] Step S818, determining the eddy current loss information of any winding according to the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding.

[0105] It should be noted that the specific limitations of the above steps can refer to the specific limitations of the method for determining the winding eddy current loss of a power transformer mentioned above.

[0106] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0107] Based on the same inventive concept, the embodiment of the present application also provides a device for determining the eddy current loss of the winding of a power transformer for implementing the above-mentioned method for determining the eddy current loss of the winding of a power transformer. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in the embodiments of the device for determining the eddy current loss of the winding of one or more power transformers provided below can refer to the limitations of the method for determining the eddy current loss of the winding of the power transformer above, and will not be repeated here.

[0108] In an exemplary embodiment, Fig. 9 As shown, a device for determining winding eddy current loss of a power transformer is provided, comprising: a construction module 902, a simulation module 904, a first determination module 909, a second determination module 908 and a third determination module 910, wherein:

[0109] A construction module 902 is used to construct a digital three-dimensional model for a power transformer;

[0110] The simulation module 904 is used to obtain the magnetic flux leakage distribution of any winding of the power transformer under various operating conditions by simulating the digital three-dimensional model;

[0111] A first determination module 906 is used to determine the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any winding based on the magnetic leakage distribution of any winding;

[0112] A second determination module 908 is used to determine eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each conductor in any winding;

[0113] The third determination module 910 is used to determine the eddy current loss information of any winding according to the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding.

[0114] In an exemplary embodiment, the construction module 902 is specifically used to obtain the three-dimensional model parameters of the power transformer; and construct a digital three-dimensional model of the power transformer based on the three-dimensional model parameters of the power transformer.

[0115] In an exemplary embodiment, the three-dimensional model parameters include three-dimensional structural parameters corresponding to each component in the power transformer, and the construction module 902 is specifically used to generate a three-dimensional structural model corresponding to each component in the power transformer based on the three-dimensional structural parameters corresponding to each component in the power transformer; and generate a digital three-dimensional model for the power transformer based on the three-dimensional structural model corresponding to each component in the power transformer.

[0116] In an exemplary embodiment, the first determination module 906 is specifically used to determine the coordinates of the center point of the central cross-section of each conductor in any winding according to the three-dimensional model parameters of the power transformer; based on the leakage magnetic distribution of any winding, extract the axial leakage magnetic component and radial leakage magnetic component corresponding to the coordinates of the center point of the central cross-section of each conductor in any winding; and use the axial leakage magnetic component and radial leakage magnetic component corresponding to the coordinates of the center point of the central cross-section of each conductor in any winding as the axial leakage magnetic component and radial leakage magnetic component of each conductor in any winding.

[0117] In an exemplary embodiment, the second determination module 908 is specifically used to input the axial magnetic leakage component corresponding to each conductor in any winding into the axial eddy current loss determination model to obtain the eddy current loss information caused by the axial magnetic leakage component of each conductor in any winding, and to input the radial magnetic leakage component corresponding to each conductor in any winding into the radial eddy current loss determination model to obtain the eddy current loss information caused by the radial magnetic leakage component of each conductor in any winding.

[0118] In an exemplary embodiment, the third determination module 910 is specifically used to superimpose the eddy current loss information caused by the axial leakage magnetic component of each conductor in any winding to obtain the eddy current loss information caused by the axial leakage magnetic component of any winding, and to superimpose the eddy current loss information caused by the radial leakage magnetic component of each conductor in any winding to obtain the eddy current loss information caused by the radial leakage magnetic component of any winding; based on the eddy current loss information caused by the axial leakage magnetic component and the eddy current loss information caused by the radial leakage magnetic component of any winding, the eddy current loss information of any winding is determined.

[0119] Each module in the above-mentioned device for determining winding eddy current loss of power transformer can be implemented in whole or in part by software, hardware and a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module above.

[0120] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Fig.10 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to 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 the determination data of the winding eddy current loss of the power transformer. The input / output interface of the computer device is used to exchange information between the processor and the external device. 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, a method for determining the winding eddy current loss of a power transformer is implemented.

[0121] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure 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 a different arrangement of components.

[0122] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above-mentioned method for determining the eddy current loss of the winding of a power transformer. The steps of the method for determining the eddy current loss of the winding of a power transformer here may be the steps of the method for determining the eddy current loss of the winding of a power transformer in each of the above-mentioned embodiments.

[0123] In one embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the processor executes the steps of the above-mentioned method for determining the eddy current loss of the winding of a power transformer. Here, the steps of the method for determining the eddy current loss of the winding of a power transformer may be the steps of the method for determining the eddy current loss of the winding of a power transformer in each of the above-mentioned embodiments.

[0124] In one embodiment, a computer program product is provided, including a computer program, which, when executed by a processor, causes the processor to execute the steps of the above-mentioned method for determining the eddy current loss of a winding of a power transformer. The steps of the method for determining the eddy current loss of a winding of a power transformer here may be the steps of the method for determining the eddy current loss of a winding of a power transformer in each of the above-mentioned embodiments.

[0125] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and 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-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile 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. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0126] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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 specification.

[0127] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for determining eddy current loss of a power transformer winding, characterized in that: The method comprises: Construct a digital 3D model for power transformers; By simulating the digital three-dimensional model, the magnetic flux leakage distribution of any winding of the power transformer under various operating conditions is obtained; Based on the magnetic flux leakage distribution of any one of the windings, determining the axial magnetic flux leakage component and the radial magnetic flux leakage component corresponding to each wire in any one of the windings; According to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any one winding, determining the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each wire in any one winding; The eddy current loss information of any of the windings is determined according to the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any of the windings.

2. The method according to claim 1, characterized in that Construct a digital 3D model of the power transformer, including: Acquiring three-dimensional model parameters of the power transformer; Based on the three-dimensional model parameters of the power transformer, a digital three-dimensional model of the power transformer is constructed.

3. The method according to claim 2, characterized in that The three-dimensional model parameters include three-dimensional structural parameters corresponding to each component in the power transformer. The digital three-dimensional model of the power transformer is constructed based on the three-dimensional model parameters of the power transformer, including: Based on the three-dimensional structural parameters corresponding to the components in the power transformer, generating a three-dimensional structural model corresponding to the components in the power transformer; A digital three-dimensional model of the power transformer is generated according to the three-dimensional structural model corresponding to each component in the power transformer.

4. The method according to claim 2, characterized in that: The determining, based on the magnetic leakage distribution of any one of the windings, the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any one of the windings comprises: Determining the coordinates of the center point of the center section of each conductor in any winding according to the three-dimensional model parameters of the power transformer; Based on the magnetic flux leakage distribution of any one of the windings, extracting the axial magnetic flux leakage component and the radial magnetic flux leakage component corresponding to the coordinates of the center point of the central cross section of each conductor in any one of the windings; The axial magnetic leakage component and the radial magnetic leakage component corresponding to the coordinates of the central point of the central cross section of each conductor in any one winding are used as the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any one winding.

5. The method according to claim 1, characterized in that The determining, according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any one winding, the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each wire in any one winding, respectively, comprises: The axial magnetic leakage component corresponding to each conductor in any one of the windings is input into the axial eddy current loss determination model to obtain the eddy current loss information of each conductor in any one of the windings caused by the axial magnetic leakage component, and the radial magnetic leakage component corresponding to each conductor in any one of the windings is input into the radial eddy current loss determination model to obtain the eddy current loss information of each conductor in any one of the windings caused by the radial magnetic leakage component.

6. The method according to claim 1, characterized in that Determining the eddy current loss information of any winding according to the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each conductor in any winding comprises: Superimposing the eddy current loss information caused by the axial magnetic leakage component of each conductor in any of the windings to obtain the eddy current loss information caused by the axial magnetic leakage component of any of the windings, and superimposing the eddy current loss information caused by the radial magnetic leakage component of each conductor in any of the windings to obtain the eddy current loss information caused by the radial magnetic leakage component of any of the windings; The eddy current loss information of any of the windings is determined according to the eddy current loss information caused by the axial magnetic leakage component and the eddy current loss information caused by the radial magnetic leakage component of any of the windings.

7. A device for determining winding eddy current loss of a power transformer, characterized in that: The device comprises: A construction module for constructing a digital three-dimensional model of a power transformer; A simulation module, used for simulating the digital three-dimensional model to obtain the leakage magnetic distribution of any winding of the power transformer under various operating conditions; A first determination module is used to determine the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any winding based on the magnetic leakage distribution of any winding; A second determination module is used to determine, according to the axial magnetic leakage component and the radial magnetic leakage component corresponding to each wire in any one winding, the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each wire in any one winding; The third determination module is used to determine the eddy current loss information of any of the windings according to the eddy current loss information caused by the axial magnetic leakage component and the radial magnetic leakage component of each wire in any of the windings.

8. 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 6 are implemented.

9. 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 6 are implemented.

10. A computer program product, comprising a computer program, 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 6 are implemented.

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