Transformer broadband modeling method and system, electronic equipment and medium

Abstract

The invention relates to the technical field of transformers, and discloses a transformer broadband modeling method and system, electronic equipment and a medium, and the method comprises the steps: segmenting a primary winding and a secondary winding of a converter transformer, and dividing the primary winding and the secondary winding into a plurality of segmented coil units; coupling the plurality of segmented coil units to obtain an initial segmentation model of the converter transformer; carrying out equivalence on element parameters of the initial segmentation model of the converter transformer based on a high-frequency skin effect; and inputting the equivalent element parameters into the initial segmentation model of the converter transformer to obtain a segmentation model of the converter transformer. According to the method, the high-frequency characteristics of the converter transformer can be simulated more accurately, and the high-frequency impedance characteristics of the transformer can be analyzed accurately, so that the simulation effect of the converter transformer is more accurate.

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] The converter transformer has a strong inhibitory effect on the propagation of disturbances on the AC side. Its characteristics have a great influence on the simulation of disturbance levels. In the unified calculation of steady state and disturbance, its power frequency characteristics and disturbance propagation characteristics must be taken into account. In current DC projects, it is generally required that the converter transformer be tested for inter-winding and winding-to-ground capacitance before leaving the factory, which requires broadband modeling of the converter transformer.

[0003] 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, and it is 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] Based on the high-frequency skin effect, component parameters of the initial segmented model of the converter transformer are equivalent;

[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 meets the limitation of the number of the segmented coil units by a preset simulation calculation time and a preset simulation calculation accuracy, and the number of segments of the segmented coil unit meets the following formula:

[0011] ,and

[0012] Where n is the number of segments of the segmented coil unit, is the preset simulation calculation time, is 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 comprises:

[0014] For each segmented coil unit, the segmented coil unit of the primary winding is mutually coupled with the segmented coil unit of the secondary winding through mutual inductance, and the segmented coil unit of the primary winding is electrically connected with the segmented coil unit of the secondary winding through coupling capacitance, so as 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] The first end of the first winding inter-turn resistance is connected to the line between the mutual inductance and the second main winding resistance, the second end of the first winding inter-turn resistance is connected to the first end of the first winding inter-turn capacitance, and the second end of the first winding inter-turn capacitance is connected to the 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 capacitance to ground.

[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 comprises:

[0020] The actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer are evenly divided to obtain an 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.

[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 comprises:

[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, and the main winding resistance is the first main winding resistance and the second main winding resistance.

[0023] Optionally, 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] A winding segmentation module is used to segment the primary winding and the secondary winding of the converter transformer into a plurality of segmented coil units;

[0026] A circuit coupling module, used for coupling 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 the component parameters of the initial segmented model of the converter transformer based on the 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 the memory stores a computer program, 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, and when the computer program is executed, the steps of the transformer broadband modeling method as described in the first aspect are implemented.

[0031] It can be seen from the above technical scheme that the present invention segments the primary winding and the secondary winding of the converter transformer, and equivalentizes the component parameters of the initial segmented model of the converter transformer by considering the high-frequency skin effect, 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 diagram of the structure 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 of frequency and phase angle comparison 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 An initial segmented model circuit diagram of a converter transformer provided by an embodiment of the present invention;

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

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

[0039] Figure 8 A schematic diagram of the structure 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 scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in 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 creative work are 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 influence of stray capacitance on high frequency characteristics, including the stray capacitance C of the primary coil to the ground. 11 , stray capacitance of secondary coil to ground C 22、Stray capacitance C between primary and secondary 12 , primary and secondary winding turn-to-turn capacitance (C k1 , C k2 ). The stray parameters are obtained from the results of "winding-to-ground and inter-winding capacitance measurement" in the equipment factory type test specified in standard GB1094-1. Different single-phase transformers are installed far away, and the grounded shell can also play a strong shielding role, so the near-field coupling between different transformers can be ignored.

[0042] The various capacitors in the above model represent the stray capacitance between the grid-side winding and the ground, the valve-side winding and the ground, the grid-side winding and the valve-side winding, the inside of the grid-side winding and the inside 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 are different from those of single-phase two-winding. There is electromagnetic coupling between windings of different phases or windings of the same phase with different connections. Capacitive coupling (expressed by stray capacitance) will affect the conduction of electromagnetic interference. The windings of different phases of the power transformer are generally in different core columns. The coupling between windings of different phases is smaller than the coupling between high and low voltage windings of the same phase, and can be ignored in the calculation. Its 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: Figure 2~3 As shown, in Figure 2~3 In the figure, the black curve is the measured curve, and the red curve is the simulated waveform using the above model. Figure 2~3 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 the impedance characteristics cannot be accurately simulated. 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, and the simplified model that concentrates the stray capacitance on the converter transformer port can only fit the main resonance point with the largest impedance well, and cannot reflect other resonance points. That is, 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, it is 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 by the embodiment of the present application can be applicable 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. Among them:

[0049] Step S1, segmenting 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 meets the following formula:

[0051] ,and

[0052] Where n is the number of segments of the segmented coil unit, is the preset simulation calculation time, is 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] Among them, the simulation calculation time and simulation calculation accuracy can be set based on actual needs, or can be determined by satisfying the following formula:

[0054]

[0055]

[0056] Step S2: couple a plurality of segmented coil units to obtain an initial segmented model of the converter transformer.

[0057] 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 is electrically connected to the segmented coil unit of the secondary winding through coupling capacitance, so as to obtain the initial segmented model of the converter transformer.

[0058] The initial segmentation model of the converter transformer is as follows: Figure 5As shown in the figure, the initial segmented model of the converter transformer disperses the stray capacitance originally concentrated at the port inside the winding, connects it to the segmented reactance of the converter transformer respectively, 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 structures of each segmented coil unit are 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 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 ground capacitance;

[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 capacitance to ground.

[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] According to the actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer, an equal division process is performed to obtain an equivalent inductance value of the main winding segment inductance, and 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] Wherein, L10 and L20 represent the main winding segment inductances corresponding to the primary winding and secondary winding of the converter transformer, respectively; L11 and L22 represent the actual main winding inductances corresponding to the primary winding and secondary winding 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 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, and the main winding resistance is the first main winding resistance and the second main winding resistance.

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

[0071]

[0072]

[0073] In the formula, R10 and R20 represent the main winding segment resistances 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 material magnetic permeability, 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 power frequency impedance of the transformer.

[0075] In some embodiments, in the current common broadband model, the actual winding turn-to-turn capacitance C1K, C2K, and the actual winding-to-ground capacitance of the converter transformer are used. , , 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 the secondary winding of the converter transformer. The specific calculation formula is as follows:

[0076]

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

[0078] Among them, 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 mainly represent 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 1500~2000Ω.

[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 uses the segmented model of the converter transformer determined by the transformer broadband modeling method proposed in the embodiment of the present application to perform simulation, and obtains a comparison between the simulated curve and the measured curve of the impedance characteristic at both ends of the valve side winding. Figure 6 As shown, the impedance characteristic curve at both ends of the valve-side winding obtained by simulation can have a good fit 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 equivalentizes the component parameters of the initial segmented model of the converter transformer by considering the high-frequency skin effect, 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 recorded in the above method, so 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, a transformer broadband modeling system provided by an embodiment of the present application includes:

[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 operation on the 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 meets the limitation of the number of segmented coil units by the preset simulation calculation time and the preset simulation calculation accuracy, and the number of segments of the segmented coil unit meets the following formula:

[0090] ,and

[0091] Where n is the number of segments of the segmented coil unit, is the preset simulation calculation time, is 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 is mutually coupled with the segmented coil unit of the secondary winding through mutual inductance, and the segmented coil unit of the primary winding is electrically connected with the segmented coil unit of the secondary winding through coupling capacitance, so as 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 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;

[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 ground capacitance;

[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 capacitance to ground.

[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] According to the actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer, an equal division process is performed to obtain an equivalent inductance value of the main winding segment inductance, and 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 the secondary winding of the converter transformer, the equivalent resistance value of the main winding resistance is determined, and the main winding resistance is 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 can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, electronic device and computer storage medium 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 inherent to these processes, methods, products or apparatus.

[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, a program segment or a part of a code, and a part of a module, a program segment or a code includes 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 from 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 only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, 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 an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

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

[0110] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0111] If the integrated unit is implemented in the form of 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, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for executing all or part of the steps of the method described in each embodiment of the present invention through a computer device (which can be a personal computer, server, or network device, etc.). The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: Read-Only Memory, English abbreviation: ROM), random access memory (full name in English: Random Access Memory, English abbreviation: RAM), disk or optical disk, etc. Various media that can store program codes.

[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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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 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; coupling a plurality of segmented coil units to obtain an initial segmented model of the converter transformer; Based on the high-frequency skin effect, component parameters of the initial segmented model of the converter transformer are equivalent; 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 limitation 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, is the preset simulation calculation time, is the preset simulation calculation accuracy. , , and 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 comprises: For each segmented coil unit, the segmented coil unit of the primary winding is mutually coupled with the segmented coil unit of the secondary winding through mutual inductance, and the segmented coil unit of the primary winding is electrically connected with the segmented coil unit of the secondary winding through coupling capacitance, so as to obtain an initial segmented model of the converter transformer.

4. The transformer broadband modeling method according to any one of claims 1 to 3, characterized in that: 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; The first end of the first winding inter-turn resistance is connected to the line between the mutual inductance and the second main winding resistance, the second end of the first winding inter-turn resistance is connected to the first end of the first winding inter-turn capacitance, and the second end of the first winding inter-turn capacitance is connected to the line between the second main winding segment inductance and the first winding ground capacitance; 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 capacitance to ground.

5. The transformer broadband modeling method according to claim 4, 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 comprises: The actual main winding inductances corresponding to the primary winding and the secondary winding of the converter transformer are evenly divided to obtain an 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.

6. The transformer broadband modeling method according to claim 4, 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 comprises: 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, and the main winding resistance is the first main winding resistance and the second main winding resistance.

7. The transformer broadband modeling method according to claim 4, characterized in that: 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.

8. A transformer broadband modeling system, characterized in that: include: A winding segmentation module is used to segment the primary winding and the secondary winding of the converter transformer into a plurality of segmented coil units; A circuit coupling module, used for coupling 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 the component parameters of the initial segmented model of the converter transformer based on the high-frequency skin effect; 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.

9. An electronic device, characterized in that: The electronic device includes 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 according to any one of claims 1 to 7.

10. 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 7 are implemented.

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