A transformer broadband modeling method, system, electronic device and medium

Abstract

The present invention relates to the field of transformer technology and discloses a method, system, electronic device, and medium for broadband transformer modeling. The method comprises: segmenting the primary and secondary windings of a converter transformer into a plurality of segmented coil units; coupling the plurality of segmented coil units to obtain an initial segmented model of the converter transformer; performing equivalence on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect; and inputting the equivalent component parameters into the initial segmented model of the converter transformer to obtain the segmented model of the converter transformer. This method can more accurately simulate the high-frequency characteristics of the converter transformer and accurately analyze the high-frequency impedance characteristics of the transformer, thereby achieving more accurate simulation results of the converter transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer broadband modeling method, system, electronic equipment, and medium. Background Art

[0002] Converter transformers strongly suppress disturbance propagation on the AC side, and their characteristics significantly influence disturbance level simulation. Both their power frequency characteristics and disturbance propagation characteristics must be considered in unified steady-state and disturbance calculations. Current DC projects generally require converter transformers to undergo additional inter-winding and winding-to-ground capacitance testing before shipment, necessitating broadband modeling of the converter transformer.

[0003] Existing transformer broadband modeling methods mainly use lumped parameters to simulate the high-frequency characteristics of converter transformers, but their simulation effect is extremely limited, especially in the high-frequency band, making it difficult to accurately analyze the high-frequency impedance characteristics of the transformer. Summary of the Invention

[0004] In view of this, the present invention provides a transformer broadband modeling method, system, electronic device and medium, which solves the technical problem that the simulation effect of the existing transformer broadband modeling method is extremely limited, especially in the high frequency band, and it is difficult to accurately analyze the high-frequency impedance characteristics of the transformer.

[0005] A first aspect of the present invention provides a transformer broadband modeling method, comprising:

[0006] The primary winding and the secondary winding of the converter transformer are segmented into a plurality of segmented coil units;

[0007] coupling a plurality of segmented coil units to obtain an initial segmented model of the converter transformer;

[0008] Equivalence of component parameters of the initial segmented model of the converter transformer based on high-frequency skin effect;

[0009] The equivalent component parameters are input into the initial segmented model of the converter transformer to obtain the segmented model of the converter transformer.

[0010] Optionally, the number of segments of the segmented coil unit satisfies the limitations of a preset simulation calculation time and a preset simulation calculation accuracy on the number of the segmented coil units, and the number of segments of the segmented coil unit satisfies the following formula:

[0011] ,and

[0012] Where n is the number of segments of the segmented coil unit, is the preset simulation calculation time, For the preset simulation calculation accuracy, 、 、 and are all constants.

[0013] Optionally, the step of coupling a plurality of segmented coil units to obtain an initial segmented model of the converter transformer includes:

[0014] For each segmented coil unit, the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are mutually coupled through mutual inductance, and the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are electrically connected through coupling capacitance to obtain an initial segmented model of the converter transformer.

[0015] Optionally, the segmented coil unit includes a first main winding segment inductance, a second main winding segment inductance, a mutual inductance, a first main winding resistance, a second main winding resistance, a first winding-to-ground resistance, a second winding-to-ground resistance, a first winding turn-to-turn resistance, a second winding turn-to-turn resistance, a first winding-to-ground capacitance, a second winding-to-ground capacitance, a first winding turn-to-turn capacitance, and a second winding turn-to-turn capacitance;

[0016] The first main winding segment inductance, the first main winding resistance, the mutual inductance, the second main winding resistance, the second main winding segment inductance, the first winding-to-ground capacitance, the first winding-to-ground resistance, the second winding-to-ground resistance, and the second winding-to-ground capacitance are sequentially connected in series to form a segmented loop; wherein the line between the first winding-to-ground resistance and the second winding-to-ground resistance is grounded;

[0017] A first end of the first winding inter-turn resistor is connected to a line between the mutual inductance and the second main winding resistor, a second end of the first winding inter-turn resistor is connected to a first end of the first winding inter-turn capacitor, and a second end of the first winding inter-turn capacitor is connected to a line between the second main winding segment inductance and the first winding ground capacitance;

[0018] The first end of the second winding inter-turn resistance is connected to the line between the mutual inductance and the first main winding resistance, the second end of the second winding inter-turn resistance is connected to the first end of the second winding inter-turn capacitance, and the second end of the second winding inter-turn capacitance is connected to the line between the first main winding segment inductance and the second winding ground capacitance.

[0019] Optionally, the step of performing equivalent operation on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect includes:

[0020] The equivalent inductance value of the main winding segment inductance is obtained by equalizing the actual main winding inductance corresponding to the primary winding and the secondary winding of the converter transformer, and the main winding segment inductance is the first main winding segment inductance or the second main winding segment inductance.

[0021] Optionally, the step of performing equivalent operation on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect includes:

[0022] The equivalent resistance value of the main winding resistance is determined according to the actual main winding resistance corresponding to the primary winding and the secondary winding of the converter transformer, the resistance material parameters, and the number of segments of the segmented coil unit. The main winding resistance is the first main winding resistance and the second main winding resistance.

[0023] Optionally, the equivalent resistance values ​​of the first winding-to-ground resistance, the second winding-to-ground resistance, the first winding turn-to-turn resistance, and the second winding turn-to-turn resistance are all 1500-2000Ω.

[0024] In a second aspect, the present invention further provides a transformer broadband modeling system, comprising:

[0025] The winding segmentation module is used to segment the primary winding and secondary winding of the converter transformer into several segmented coil units;

[0026] A circuit coupling module, configured to couple a plurality of segmented coil units to obtain an initial segmented model of the converter transformer;

[0027] A parameter equivalent module, used for performing equivalent operation on component parameters of the initial segmented model of the converter transformer based on a high-frequency skin effect;

[0028] The model building module is used to input equivalent component parameters into the initial segmented model of the converter transformer to obtain the segmented model of the converter transformer.

[0029] In a third aspect, the present invention further provides an electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the transformer broadband modeling method as described in the first aspect.

[0030] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the steps of the transformer broadband modeling method as described in the first aspect.

[0031] It can be seen from the above technical solutions that the present invention segments the primary winding and the secondary winding of the converter transformer, and by considering the high-frequency skin effect, the component parameters of the initial segmented model of the converter transformer are equivalent, thereby obtaining a segmented model of the converter transformer, which can more accurately simulate the high-frequency characteristics of the converter transformer and accurately analyze the high-frequency impedance characteristics of the transformer, making the simulation effect of the converter transformer more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a converter transformer provided in an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of frequency impedance comparison of valve-side winding impedance simulation provided by an embodiment of the present invention;

[0034] Figure 3 A schematic diagram showing the comparison of frequency and phase angle of valve-side winding impedance simulation provided by an embodiment of the present invention;

[0035] Figure 4 A flowchart of a transformer broadband modeling method provided by an embodiment of the present invention;

[0036] Figure 5 A circuit diagram of an initial segmented model of a converter transformer provided by an embodiment of the present invention;

[0037] Figure 6 A comparison chart of the simulation curve and the measured curve of the model provided in the embodiment of the present invention;

[0038] Figure 7 A schematic structural diagram of a transformer broadband modeling system provided by an embodiment of the present invention;

[0039] Figure 8 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] like Figure 1 The structure of the converter transformer shown in the figure uses lumped parameter capacitance to represent the effect of stray capacitance on high-frequency characteristics, including the primary winding to ground stray capacitance C 11 , secondary coil to ground stray capacitance C 22、Stray capacitance C between primary and secondary 12 、Capacitance between primary and secondary winding turns (C k1 、C k2 The spurious parameters are derived from the "winding-to-ground and interwinding capacitance measurements" during the factory type testing of equipment specified in standard GB1094-1. The different single-phase transformers are installed remotely, and their grounded housings provide strong shielding, making near-field coupling between the transformers negligible.

[0042] The various capacitors in the above model represent the stray capacitances between the grid-side winding and ground, the valve-side winding and ground, the grid-side winding and the valve-side winding, and the internal capacitances of the grid-side winding and the internal capacitance of the valve-side winding of the converter transformer.

[0043] The structures of single-phase three-winding, three-phase two-winding, and three-phase three-winding systems differ from those of single-phase two-winding systems. Electromagnetic coupling exists between windings of different phases or between windings of the same phase but with different connections. Capacitive coupling (represented by stray capacitance) can affect the conduction of electromagnetic interference. Different-phase windings of power transformers are generally located on different core legs. The coupling between different-phase windings is smaller than the coupling between the same-phase high- and low-voltage windings and can be ignored in calculations. Typical values ​​are shown in Table 1.

[0044] Table 1 Converter station transformer stray capacitance parameters

[0045]

[0046] According to the above model, when the grid side is short-circuited and grounded, the simulation results of the valve side winding impedance are as follows: Figures 2 and 3 As shown, in Figures 2 and 3 In the figure, the black curve is the measured curve, and the red curve is the simulated waveform using the above model. Figures 2 and 3 It can be concluded that the simulation effect of the above model is poor, especially in the high frequency band (such as above 10KHz), and it is impossible to accurately simulate the impedance characteristics. From the measured impedance characteristic curve, it can be seen that due to the dispersed characteristics of the stray capacitance, multiple resonance points are generated in the mid-frequency band around 10kHz. The simplified model that concentrates the stray capacitance on the converter transformer port can only well fit the main resonance point with the largest impedance, and cannot reflect other resonance points. In other words, the existing transformer broadband modeling method mainly uses concentrated parameters to simulate the high-frequency characteristics of the converter transformer, but its simulation effect is extremely limited, especially in the high-frequency band, making it difficult to accurately analyze the high-frequency impedance characteristics of the transformer.

[0047] To this end, an embodiment of the present application provides a transformer broadband modeling method. The transformer broadband modeling method provided in the embodiment of the present application can be applied to the case of transformer broadband modeling. The method can be executed by a transformer broadband modeling device. The transformer broadband modeling device can be implemented in the form of hardware and / or software. The transformer broadband modeling device can be configured in a computer device.

[0048] like Figure 4 As shown, the embodiment of the present application provides a transformer broadband modeling method, including steps S1 to S4.

[0049] Step S1: segment the primary winding and the secondary winding of the converter transformer into a plurality of segmented coil units.

[0050] The number of segments of the segmented coil unit can be selected from 4 to 6. In order to meet the simulation requirements, the number of segments of the segmented coil unit meets the limitations of the preset simulation calculation time and the preset simulation calculation accuracy on the number of segmented coil units. The number of segments of the segmented coil unit satisfies the following formula:

[0051] ,and

[0052] Where n is the number of segments of the segmented coil unit, is the preset simulation calculation time, For the preset simulation calculation accuracy, 、 、 and are all constants, among which, 、 、 and Preferably, 0.26, 0.38, 0.96, and 0.88 are used respectively.

[0053] The simulation calculation time and accuracy can be set based on actual needs, or determined by satisfying the following formula:

[0054]

[0055]

[0056] Step S2: Couple several segmented coil units to obtain an initial segmented model of the converter transformer.

[0057] The segmented coil units corresponding to the primary winding and the secondary winding are symmetrical after coupling. Specifically, for each segmented coil unit, the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are mutually coupled through mutual inductance, and the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are electrically connected through coupling capacitance to obtain the initial segmented model of the converter transformer.

[0058] The initial segmentation model of the converter transformer is as follows: Figure 5The initial segmented model of the converter transformer disperses the stray capacitance originally concentrated at the ports within the windings, connects them to the segmented reactances of the converter transformer, and connects the grid-side and valve-side windings between the two sides of the converter transformer in the form of mutual inductors.

[0059] Among them, the structure of each segmented coil unit is consistent, and the segmented coil unit includes a first main winding segment inductance, a second main winding segment inductance, a mutual inductance, a first main winding resistance, a second main winding resistance, a first winding-to-ground resistance, a second winding-to-ground resistance, a first winding turn-to-turn resistance, a second winding turn-to-turn resistance, a first winding-to-ground capacitance, a second winding-to-ground capacitance, a first winding turn-to-turn capacitance, and a second winding turn-to-turn capacitance;

[0060] The first main winding segment inductance, the first main winding resistance, the mutual inductance, the second main winding resistance, the second main winding segment inductance, the first winding-to-ground capacitance, the first winding-to-ground resistance, the second winding-to-ground resistance, and the second winding-to-ground capacitance are sequentially connected in series to form a segmented loop; wherein the line between the first winding-to-ground resistance and the second winding-to-ground resistance is grounded;

[0061] A first end of the first winding inter-turn resistor is connected to a line between the mutual inductance and the second main winding resistor, a second end of the first winding inter-turn resistor is connected to a first end of the first winding inter-turn capacitor, and a second end of the first winding inter-turn capacitor is connected to a line between the second main winding segment inductance and the first winding capacitance to ground;

[0062] The first end of the second winding inter-turn resistance is connected to the line between the mutual inductance and the first main winding resistance, the second end of the second winding inter-turn resistance is connected to the first end of the second winding inter-turn capacitance, and the second end of the second winding inter-turn capacitance is connected to the line between the first main winding segment inductance and the second winding ground capacitance.

[0063] Step S3: performing equivalence on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect.

[0064] Specifically, in step S3, the process of performing equivalence on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect includes:

[0065] The actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer are evenly divided to obtain the equivalent inductance value of the main winding segment inductance, where the main winding segment inductance is the first main winding segment inductance or the second main winding segment inductance.

[0066] In this embodiment of the present application, the actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer are evenly divided, that is:

[0067]

[0068] Where L10 and L20 represent the main winding segment inductances corresponding to the primary and secondary windings of the converter transformer, respectively; L11 and L22 represent the actual main winding inductances corresponding to the primary and secondary windings of the converter transformer, respectively. The actual main winding inductances can be obtained through transformer testing; and n is the number of segments of the segmented coil unit.

[0069] In some embodiments, the equivalent resistance value of the main winding resistance is determined based on the actual main winding resistance, resistance material parameters, and the number of segments of the segmented coil unit corresponding to the primary winding and secondary winding of the converter transformer, respectively. The main winding resistance includes a first main winding resistance and a second main winding resistance.

[0070] Specifically, in actual high-frequency resonance, as the frequency increases, the skin effect intensifies, the circuit resistance increases, and it is no longer the low resistance at low frequencies, which reduces the resonance quality factor. Therefore, the calculation method for the equivalent resistance value of the main winding resistor is as follows:

[0071]

[0072]

[0073] In the formula, R10 and R20 represent the main winding segment resistance corresponding to the primary winding and secondary winding of the converter transformer respectively. is the conductivity per unit length of the conductor material, is the magnetic permeability of the material, is the angular frequency, R1 is the DC resistance of the grid-side winding, and R2 is the DC resistance of the valve-side winding.

[0074] It can be understood that dividing the transformer into equal parts according to its actual parameters and connecting them in series can effectively express the transformer's power frequency impedance.

[0075] In some embodiments, in the current common broadband model, the actual inter-turn capacitance C1K, C2K of the converter transformer and the actual winding-to-ground capacitance C1K, C2 ... 、 , the actual inter-winding capacitance C12 is used to simulate the high-frequency characteristics. In this model, the above capacitance is also segmented to obtain the capacitance parameters corresponding to the primary winding and secondary winding of the converter transformer. The specific calculation formula is as follows:

[0076]

[0077] Where, 、 are the winding-to-ground capacitances corresponding to the primary and secondary windings of the converter transformer, 、 are the inter-turn capacitances corresponding to the primary and secondary windings of the converter transformer, is the coupling capacitance of the converter transformer.

[0078] The first winding-to-ground resistance, the second winding-to-ground resistance, the first winding turn-to-turn resistance, and the second winding turn-to-turn resistance primarily characterize the quality factor of broadband impedance. In some embodiments, the equivalent resistance values ​​of the first winding-to-ground resistance, the second winding-to-ground resistance, the first winding turn-to-turn resistance, and the second winding turn-to-turn resistance are all between 1500 and 2000 Ω.

[0079] Step S4: input equivalent component parameters into the initial segmented model of the converter transformer to obtain the segmented model of the converter transformer.

[0080] The following is a simulation of the converter transformer segment model determined by the transformer broadband modeling method proposed in the embodiment of the present application, and a comparison between the simulated curve and the measured curve of the impedance characteristic at both ends of the valve side winding is obtained. Figure 6 As shown, the impedance characteristic curve at both ends of the valve-side winding obtained by simulation can be well matched with the measured curve, can reflect the resonance characteristics within 10 kHz, and can reflect the fitting of stray capacitance in the high frequency band, indicating that the transformer broadband modeling method proposed in the embodiment of the present application is more accurate than the existing modeling method.

[0081] It should be noted that the embodiment of the present application segments the primary winding and the secondary winding of the converter transformer, and by considering the high-frequency skin effect, the component parameters of the initial segmented model of the converter transformer are equivalent, thereby obtaining a segmented model of the converter transformer, which can more accurately simulate the high-frequency characteristics of the converter transformer and accurately analyze the high-frequency impedance characteristics of the transformer, making the simulation effect of the converter transformer more accurate.

[0082] Based on the same inventive concept, an embodiment of the present application further provides a transformer broadband modeling system for implementing the above-mentioned transformer broadband modeling method.

[0083] The implementation solution provided by the system to solve the problem is similar to the implementation solution described in the above method. Therefore, the specific limitations in one or more transformer broadband modeling system embodiments provided below can refer to the limitations on the transformer broadband modeling method above and will not be repeated here.

[0084] like Figure 7 As shown, an embodiment of the present application provides a transformer broadband modeling system, comprising:

[0085] The winding segmentation module 100 is used to segment the primary winding and the secondary winding of the converter transformer into a plurality of segmented coil units;

[0086] The circuit coupling module 200 is used to couple a plurality of segmented coil units to obtain an initial segmented model of the converter transformer;

[0087] A parameter equivalent module 300 is used to perform equivalent component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect;

[0088] The model building module 400 is used to input equivalent component parameters into the initial segmented model of the converter transformer to obtain the segmented model of the converter transformer.

[0089] In some embodiments, the number of segments of the segmented coil unit satisfies the limitations of a preset simulation calculation time and a preset simulation calculation accuracy on the number of segmented coil units, and the number of segments of the segmented coil unit satisfies the following formula:

[0090] ,and

[0091] Where n is the number of segments of the segmented coil unit, is the preset simulation calculation time, For the preset simulation calculation accuracy, 、 、 and are all constants.

[0092] In some embodiments, the step of coupling a plurality of segmented coil units to obtain an initial segmented model of the converter transformer includes:

[0093] For each segmented coil unit, the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are mutually coupled through mutual inductance, and the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are electrically connected through coupling capacitance to obtain an initial segmented model of the converter transformer.

[0094] In some embodiments, the segmented coil unit includes a first main winding segment inductance, a second main winding segment inductance, a mutual inductance, a first main winding resistance, a second main winding resistance, a first winding-to-ground resistance, a second winding-to-ground resistance, a first winding inter-turn resistance, a second winding inter-turn resistance, a first winding-to-ground capacitance, a second winding-to-ground capacitance, a first winding inter-turn capacitance, and a second winding inter-turn capacitance;

[0095] The first main winding segment inductance, the first main winding resistance, the mutual inductance, the second main winding resistance, the second main winding segment inductance, the first winding-to-ground capacitance, the first winding-to-ground resistance, the second winding-to-ground resistance, and the second winding-to-ground capacitance are sequentially connected in series to form a segmented loop; wherein the line between the first winding-to-ground resistance and the second winding-to-ground resistance is grounded;

[0096] A first end of the first winding inter-turn resistor is connected to a line between the mutual inductance and the second main winding resistor, a second end of the first winding inter-turn resistor is connected to a first end of the first winding inter-turn capacitor, and a second end of the first winding inter-turn capacitor is connected to a line between the second main winding segment inductance and the first winding capacitance to ground;

[0097] The first end of the second winding inter-turn resistance is connected to the line between the mutual inductance and the first main winding resistance, the second end of the second winding inter-turn resistance is connected to the first end of the second winding inter-turn capacitance, and the second end of the second winding inter-turn capacitance is connected to the line between the first main winding segment inductance and the second winding ground capacitance.

[0098] In some embodiments, the step of performing equivalent operation on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect includes:

[0099] The actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer are evenly divided to obtain the equivalent inductance value of the main winding segment inductance, where the main winding segment inductance is the first main winding segment inductance or the second main winding segment inductance.

[0100] In some embodiments, the step of performing equivalent operation on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect includes:

[0101] According to the actual main winding resistance, resistance material parameters and the number of segments of the segmented coil unit corresponding to the primary winding and secondary winding of the converter transformer respectively, the equivalent resistance value of the main winding resistance is determined, and the main winding resistance includes the first main winding resistance and the second main winding resistance.

[0102] In some embodiments, the equivalent resistance values ​​of the first winding-to-ground resistance, the second winding-to-ground resistance, the first winding turn-to-turn resistance, and the second winding turn-to-turn resistance are all 1500-2000Ω.

[0103] like Figure 8 As shown, an embodiment of the present application further provides an electronic device, the electronic device 10 includes a memory 20 and a processor 30, the memory 20 stores a computer program, and when the computer program is executed by the processor 30, the processor 30 executes the steps of the transformer broadband modeling method in any of the above embodiments.

[0104] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed, the steps of the transformer broadband modeling method in any of the above embodiments are implemented.

[0105] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described systems, electronic devices, and computer storage media can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0106] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or apparatuses.

[0107] In several embodiments provided by the present invention, it is understood that each box in the flow chart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved.

[0108] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, electronic devices, computer storage media and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0109] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0110] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0111] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for executing all or part of the steps of the method described in each embodiment of the present invention via a computer device (which can be a personal computer, server, or network device, etc.). The aforementioned storage medium includes various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0112] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A transformer broadband modeling method, characterized in that: include: The primary winding and the secondary winding of the converter transformer are segmented into a plurality of segmented coil units; The segmented coil unit includes a first main winding segment inductance, a second main winding segment inductance, a mutual inductance, a first main winding resistance, a second main winding resistance, a first winding-to-ground resistance, a second winding-to-ground resistance, a first winding turn-to-turn resistance, a second winding turn-to-turn resistance, a first winding-to-ground capacitance, a second winding-to-ground capacitance, a first winding turn-to-turn capacitance, and a second winding turn-to-turn capacitance; The first main winding segment inductance, the first main winding resistance, the mutual inductance, the second main winding resistance, the second main winding segment inductance, the first winding-to-ground capacitance, the first winding-to-ground resistance, the second winding-to-ground resistance, and the second winding-to-ground capacitance are sequentially connected in series to form a segmented loop; wherein the line between the first winding-to-ground resistance and the second winding-to-ground resistance is grounded; A first end of the first winding inter-turn resistor is connected to a line between the mutual inductance and the second main winding resistor, a second end of the first winding inter-turn resistor is connected to a first end of the first winding inter-turn capacitor, and a second end of the first winding inter-turn capacitor is connected to a line between the second main winding segment inductance and the first winding ground capacitance; A first end of the second winding inter-turn resistor is connected to a line between the mutual inductance and the first main winding resistor, a second end of the second winding inter-turn resistor is connected to a first end of the second winding inter-turn capacitor, and a second end of the second winding inter-turn capacitor is connected to a line between the first main winding segment inductance and the second winding ground capacitance; coupling a plurality of segmented coil units to obtain an initial segmented model of the converter transformer; The component parameters of the initial segmented model of the converter transformer are equivalent based on the high-frequency skin effect, including: Performing equal division processing on actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer, respectively, to obtain equivalent inductance values ​​of main winding segment inductances, where the main winding segment inductances are the first main winding segment inductances or the second main winding segment inductances; The equivalent component parameters are input into the initial segmented model of the converter transformer to obtain the segmented model of the converter transformer.

2. The transformer broadband modeling method according to claim 1, characterized in that: The number of segments of the segmented coil unit meets the limitations of the preset simulation calculation time and the preset simulation calculation accuracy on the number of the segmented coil units, and the number of segments of the segmented coil unit meets the following formula: and Where n is the number of segments of the segmented coil unit, T c is the preset simulation calculation time, σ is the preset simulation calculation accuracy, K a , K b , K c and K d are all constants.

3. The transformer broadband modeling method according to claim 1, characterized in that: The step of coupling a plurality of segmented coil units to obtain an initial segmented model of the converter transformer includes: For each segmented coil unit, the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are mutually coupled through mutual inductance, and the segmented coil unit of the primary winding and the segmented coil unit of the secondary winding are electrically connected through coupling capacitance to obtain an initial segmented model of the converter transformer.

4. The transformer broadband modeling method according to claim 1, characterized in that: The step of performing equivalent operation on the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect includes: The equivalent resistance value of the main winding resistance is determined according to the actual main winding resistance corresponding to the primary winding and the secondary winding of the converter transformer, the resistance material parameters, and the number of segments of the segmented coil unit. The main winding resistance is the first main winding resistance and the second main winding resistance.

5. The transformer broadband modeling method according to claim 1, characterized in that: The equivalent resistance values ​​of the first winding-to-ground resistance, the second winding-to-ground resistance, the first winding inter-turn resistance, and the second winding inter-turn resistance are all 1500-2000Ω.

6. A transformer broadband modeling system, characterized in that: include: The winding segmentation module is used to segment the primary winding and secondary winding of the converter transformer into several segmented coil units; The segmented coil unit includes a first main winding segment inductance, a second main winding segment inductance, a mutual inductance, a first main winding resistance, a second main winding resistance, a first winding-to-ground resistance, a second winding-to-ground resistance, a first winding turn-to-turn resistance, a second winding turn-to-turn resistance, a first winding-to-ground capacitance, a second winding-to-ground capacitance, a first winding turn-to-turn capacitance, and a second winding turn-to-turn capacitance; The first main winding segment inductance, the first main winding resistance, the mutual inductance, the second main winding resistance, the second main winding segment inductance, the first winding-to-ground capacitance, the first winding-to-ground resistance, the second winding-to-ground resistance, and the second winding-to-ground capacitance are sequentially connected in series to form a segmented loop; wherein the line between the first winding-to-ground resistance and the second winding-to-ground resistance is grounded; A first end of the first winding inter-turn resistor is connected to a line between the mutual inductance and the second main winding resistor, a second end of the first winding inter-turn resistor is connected to a first end of the first winding inter-turn capacitor, and a second end of the first winding inter-turn capacitor is connected to a line between the second main winding segment inductance and the first winding ground capacitance; A first end of the second winding inter-turn resistor is connected to a line between the mutual inductance and the first main winding resistor, a second end of the second winding inter-turn resistor is connected to a first end of the second winding inter-turn capacitor, and a second end of the second winding inter-turn capacitor is connected to a line between the first main winding segment inductance and the second winding ground capacitance; A circuit coupling module, configured to couple a plurality of segmented coil units to obtain an initial segmented model of the converter transformer; A parameter equivalent module, used for performing equivalent operation on component parameters of the initial segmented model of the converter transformer based on a high-frequency skin effect; The component parameters of the initial segmented model of the converter transformer are equivalent based on the high-frequency skin effect, including: Performing equal division processing on actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer, respectively, to obtain equivalent inductance values ​​of main winding segment inductances, where the main winding segment inductances are the first main winding segment inductances or the second main winding segment inductances; The model building module is used to input equivalent component parameters into the initial segmented model of the converter transformer to obtain the segmented model of the converter transformer.

7. An electronic device, characterized in that: The electronic device includes a memory and a processor, wherein a computer program is stored in the memory. When the computer program is executed by the processor, the processor performs the steps of the transformer broadband modeling method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the steps of the transformer broadband modeling method according to any one of claims 1 to 5 are implemented.

Images