Method, system, device and medium for inhibiting ferroresonance of a wideband electromagnetic voltage transformer

Abstract

The application discloses a method for inhibiting ferromagnetic resonance of a broadband electromagnetic voltage transformer, and discloses a system, equipment and medium with the method for inhibiting ferromagnetic resonance of the broadband electromagnetic voltage transformer. The method for inhibiting ferromagnetic resonance of the broadband electromagnetic voltage transformer establishes an equivalent circuit of inter-turn capacitance and hierarchical capacitance, and proposes an inter-turn and inter-layer capacitance calculation method. According to the calculation result, the PT capacitance is increased by optimizing the width of the high-voltage coil, increasing the number of coil layers and other measures, the voltage-current characteristic of the electromagnetic voltage transformer is changed, and the generation of the ferromagnetic resonance on site is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment metering, and in particular to a method, system, equipment and medium for suppressing ferromagnetic resonance of a broadband electromagnetic voltage transformer. Background Art

[0002] Electromagnetic voltage transformers (PTs) are flexible, low-frequency transmission equipment used for metering and protection, collecting information and directly impacting the safe and stable operation of power systems. During transient system faults, electromagnetic voltage transformers can generate ferromagnetic resonance with line capacitive components, leading to thermal breakdown of the PT or flashover of transformer equipment. Therefore, appropriate methods must be employed to suppress ferromagnetic resonance. Previous research and application of PT ferromagnetic resonance suppression methods have generally involved sampling and analyzing the voltage amplitude and frequency signals output by the PT's secondary side to determine harmonic content and determine if ferromagnetic resonance has occurred. If ferromagnetic resonance has occurred, a damping resistor is activated to dissipate the resonant energy and then removed. This method requires the design of additional secondary winding signal acquisition and damping devices, increasing product cost and shortening the life of the PT itself.

[0003] Since the core material of the electromagnetic voltage transformer is a nonlinear element with saturation characteristics, the PT's excitation inductance decreases rapidly. When the parameters of the ground capacitance are matched, ferromagnetic resonance occurs. Currently, there are several main methods to suppress the ferromagnetic resonance of electromagnetic voltage transformers:

[0004] 1) Improve the volt-ampere characteristics of the transformer, reduce the core magnetic density, and use magnetic materials with higher saturation magnetic density;

[0005] The selection of PT core is a key factor in its performance design. Replacing the core will affect the overall manufacturing process and performance of the PT.

[0006] 2) Adjust the line capacitance so that it is difficult to resonate with the inductance of the transformer;

[0007] This method requires additional capacitor equipment and may not be feasible in some circuits.

[0008] 3) Use damping, such as connecting an appropriate damping resistor to the remaining winding of the voltage transformer;

[0009] Additional equipment such as signal acquisition and damping resistor switching is required, which will affect the reliability of the PT.

[0010] 4) In low voltage systems, use a three-phase voltage transformer with high impedance at the neutral point.

[0011] In practice, this method is not particularly effective in suppressing ferromagnetic resonance. Summary of the Invention

[0012] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a method for suppressing ferromagnetic resonance of a broadband electromagnetic voltage transformer, which can change the volt-ampere characteristics of the electromagnetic voltage transformer and avoid the occurrence of ferromagnetic resonance.

[0013] The present invention also provides a system, a device and a storage medium having the above method for suppressing ferromagnetic resonance of a broadband electromagnetic voltage transformer.

[0014] According to the first embodiment of the present invention, the method for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer is characterized by comprising the following steps:

[0015] Establishing an equivalent circuit of the inter-turn capacitance and calculating its value to obtain a calculation result of the inter-turn capacitance;

[0016] Establishing an equivalent circuit of the interlayer capacitance and calculating its value to obtain a calculation result of the interlayer capacitance;

[0017] Optimize the high-voltage coil wiring width based on the calculation results of the inter-turn and inter-layer capacitance

[0018] The method for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer according to an embodiment of the present invention has at least the following beneficial effects:

[0019] This method establishes equivalent circuits for inter-turn and inter-layer capacitance and proposes calculation methods for inter-turn and inter-layer capacitance. Based on these calculation results, by optimizing the high-voltage coil width and increasing the number of coil layers, the PT capacitance is increased, the volt-ampere characteristics of the electromagnetic voltage transformer are modified, and the occurrence of ferromagnetic resonance is avoided, which is of great significance for improving power grid security.

[0020] According to some embodiments of the present invention, the inter-turn capacitance is the distributed capacitance between coils of the same layer of winding, and the inter-layer capacitance is the distributed capacitance between different layers of the same winding.

[0021] According to some embodiments of the present invention, the inter-turn capacitance is in the i-th layer, each inter-turn capacitance is connected in series, and the equivalent inter-turn capacitance C of the i-th unit is ti The expression is:

[0022]

[0023] Among them, N i is the number of turns in the i-th layer, C t ' is the inter-turn capacitance, and the inter-turn capacitance between different windings in the same layer is the same.

[0024] According to some embodiments of the present invention, when calculating the interlayer capacitance, the layer is used as the calculation unit. The interlayer capacitance reflects the electric field relationship between the current layer and the upper and lower layers. During the calculation, it is assumed that there is an equipotential surface between each layer of coils, and the capacitance between each layer is divided into two halves. The interlayer capacitance between the current layer and the upper and lower layers is connected in parallel to the inductance of the current layer.

[0025] According to some embodiments of the present invention, the electromagnetic voltage transformer adopts a single-stage graded winding structure.

[0026] According to some embodiments of the present invention, the odd-numbered layers of the electromagnetic voltage transformer are layered wound, and the odd-numbered layer capacitors are divided into C i1 +C i2. The even-numbered layers are wound as a whole layer, and the capacitance between them and the adjacent odd-numbered layers is C (i+1)1 +C (i+1)2 , the total series capacitance of the two layers is:

[0027] C i,i+1 =(C i1 +C i2 )×(C (i+1)1 +C (i+1)2 ) / ((C i1 +C i2 )+(C (i+1)1 +C (i+1)2) ).

[0028] According to some embodiments of the present invention, the voltage transformer has a lumped parameter unit, and the capacitance to ground in the lumped parameter unit is calculated according to the coaxial cylinder formula:

[0029]

[0030] Where: R i is the radius of the conductor in the i-th layer; R i+1 is the radius of the (i+1)th layer of conductor; ε is the equivalent dielectric constant of the combined medium between the coil and the core; l is the effective axial length of the two layers of conductor.

[0031] According to a second aspect of the present invention, a system for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer is characterized by comprising:

[0032] The inter-turn capacitance calculation module is used to establish an inter-turn capacitance equivalent circuit and calculate its value;

[0033] Interlayer capacitance calculation module, used to establish an interlayer capacitance equivalent circuit and calculate its value;

[0034] The capacitance optimization module can optimize the high-voltage coil wiring width based on the calculation results of the inter-turn and inter-layer capacitance, thereby increasing the capacitance and changing the volt-ampere characteristics.

[0035] According to the terminal provided in the embodiment of the third aspect of the present invention, the terminal includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer is implemented.

[0036] According to a fourth aspect of the present application, a computer-readable storage medium is provided, which stores computer-executable instructions for executing the above-mentioned method for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer.

[0037] The embodiments of the present application provide a method for suppressing ferromagnetic resonance based on the improvement of the electromagnetic voltage transformer's own structure, based on the existing technology. An equivalent circuit of inter-turn capacitance and layer capacitance is established, and a calculation method for inter-turn and inter-layer capacitance is proposed. Ferromagnetic suppression adopts measures to increase the product's equivalent capacitance. The implementation method is to optimize the high-voltage coil wiring width, increase the number of coil layers, adjust the values ​​of the two, increase the capacitance design value, change the volt-ampere characteristics of the electromagnetic voltage transformer, and avoid the occurrence of ferromagnetic resonance on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0039] Figure 1 A schematic diagram of the steps of a method for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer according to an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of a PT capacitance simulation calculation model considering a shielding cover provided in an embodiment of the present invention;

[0041] Figure 3 Equivalent circuit diagram of PT inter-turn capacitance and inter-layer capacitance provided by an embodiment of the present invention;

[0042] Figure 4 for Figure 2 Schematic diagram of equivalent circuit of inter-turn capacitance of PT layer i shown in FIG;

[0043] Figure 5 Schematic diagram of the interlayer capacitance transformation and equivalent circuit of the PT layer winding provided by the embodiment of the present invention, a is a schematic diagram of the equivalent transformation of the interlayer equivalent capacitance, and b is a schematic diagram of the distribution of the equivalent circuit of the voltage transformer layer winding;

[0044] Figure 6 Schematic diagram of a single-stage (pagoda-shaped) layered winding structure provided by an embodiment of the present invention;

[0045] Figure 7This is a structural block diagram of a system for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0047] The core material of an electromagnetic voltage transformer is a nonlinear element with saturation characteristics. This rapidly reduces the excitation inductance of the electromagnetic voltage transformer (PT), generating ferromagnetic resonance when matched with the parameters of the ground capacitance. Several solutions have been proposed in the prior art, but these solutions have issues with feasibility and effectiveness. To address the shortcomings of the prior art and provide new solutions, this application provides a new solution, as detailed below.

[0048] Reference Figure 1 The embodiment of the present application provides a method for suppressing ferromagnetic resonance of a broadband electromagnetic voltage transformer, the method comprising at least the following steps:

[0049] Step S100: establishing an equivalent circuit of inter-turn capacitance and layer capacitance.

[0050] Step S200: Propose a method for calculating inter-turn and inter-layer capacitance based on the equivalent circuit.

[0051] Step S300: Optimize the high-voltage coil wiring width based on the calculation results of the inter-turn and inter-layer capacitances to increase the capacitance and change the volt-ampere characteristics.

[0052] In order to explain the steps of this application in more detail, we will now start with the principles of this application.

[0053] The capacitance parameters of an electromagnetic voltage transformer (PT) depend not only on the coil geometry but also on process and impact conditions. Accurately calculating these parameters is extremely difficult because calculating them requires a complex electromagnetic field solution. To date, calculations have been performed within engineering limits using simplified models. The capacitance parameters of a voltage transformer are categorized as longitudinal and transverse capacitance.

[0054] Longitudinal capacitance represents the capacitance between adjacent turns. It is connected in parallel with the inductor along the coil direction and is calculated by converting the inter-turn geometric capacitance and inter-layer geometric capacitance into equivalent values. This is calculated based on the electric field energy equivalence principle, which states that the electrostatic energy stored in geometrically distributed capacitance is equal to the electrostatic energy stored in equivalent capacitance. Transverse capacitance represents the electric field effect of a coil unit on adjacent coils, the core leg, and the fuel tank. It is divided into ground capacitance and inter-winding capacitance. Ground capacitance includes the capacitance of the coil to the core and tank, and is calculated using the coaxial cylindrical capacitance formula. Improving PT capacitance parameters primarily increases inter-turn capacitance and inter-layer capacitance.

[0055] First, in order to simplify the model to a certain extent, the following assumptions are made:

[0056] 1) The dielectric constant of the interlayer medium does not change with frequency;

[0057] 2) The influence of the shielding cover on the capacitance calculation is not considered (to consider the influence of the shielding cover, a three-dimensional finite element model (or a two-dimensional axisymmetric finite element model) needs to be established according to the specific size of the voltage transformer, such as Figure 2 As shown, finite element software is used to calculate the electrostatic field and extract the capacitance parameters when the shielding cover is considered).

[0058] 3) To simplify the calculation, the PT interlayer capacitance is calculated assuming that the voltage is evenly distributed on the turns and that the potential of each turn is equal to the average voltage between the start and end of the turn.

[0059] Step S100: Establish an equivalent circuit of the inter-turn capacitance and calculate its value.

[0060] The distributed capacitance between the turns of the same layer of winding is called inter-turn capacitance, and the distributed capacitance between different layers of the same winding is called inter-layer capacitance. Figure 3 shown.

[0061] If the units are divided into layers, the inter-turn capacitance can be ignored. The calculation formula for the equivalent inter-turn capacitance is given below and the inter-turn capacitance is roughly calculated based on the flat plate capacitance.

[0062] like Figure 4 As shown, taking the i-th layer, all the inter-turn capacitances are connected in series, so the equivalent inter-turn capacitance C of the i-th unit is ti The expression is:

[0063]

[0064] Among them, N i is the number of turns in the i-th layer, C t ' is the inter-turn capacitance, and the inter-turn capacitance between different windings in the same layer is the same.

[0065] From the above, we can see that according to the distribution of inter-turn capacitance, the equivalent inter-turn capacitance of a unit is the value of the series connection of all coil inter-turn capacitances in the corresponding layer of the unit.

[0066] Step S200: Establish an interlayer capacitance equivalent circuit and calculate its value.

[0067] The interlayer capacitance is the main component of the coil distributed capacitance. When the layer is used as the calculation unit, the interlayer capacitance reflects the electric field relationship between the current layer and the upper and lower layers. Therefore, when calculating, it is assumed that there is an equipotential surface between each layer of coils, and the capacitance between each layer is divided into two halves. The interlayer capacitance between the current layer and the upper and lower layers is connected in parallel to the inductance of the current layer. The specific transformation of the interlayer capacitance and the equivalent circuit after the transformation are as follows: Figure 5 As shown in (a), the interlayer capacitance of the second layer winding can be replaced by Cs2, which represents the sum of the capacitances between the two equipotential surfaces after energy equivalence and is connected in parallel with the inductor. The equivalent circuit of the voltage transformer after the simplified layer winding is as follows Figure 5 (b) shown.

[0068] Step S300: Optimize the high-voltage coil wiring width based on the calculation results of the inter-turn and inter-layer capacitances to increase the capacitance and change the volt-ampere characteristics.

[0069] Reference Figure 6 The voltage transformer adopts a single-stage (pagoda-shaped) graded winding structure. By analyzing the equivalent circuits of inter-turn capacitance and inter-layer capacitance, the equivalent circuit of PT capacitance under this structure can be obtained.

[0070] The odd-numbered layer capacitors are divided into C i1 +C i2. The even-numbered layers are wound as a whole layer, and the capacitance between them and the adjacent odd-numbered layers is C (i+1)1 +C (i+1)2 The total series capacitance of the two layers is:

[0071] C i,i+1 =(C i1 +C i2 )×(C (i+1)1 +C (i+1)2 ) / ((C i1 +C i2 )+(C (i+1)1 +C (i+1)2) )(2).

[0072] The calculation method of the capacitance between different layers is the same as the above analysis, which is to connect them in parallel first and then in series.

[0073] The capacitance to ground in the lumped parameter unit of a single-stage voltage transformer is calculated using the coaxial cylinder formula:

[0074]

[0075] Where: R i is the radius of the conductor in the i-th layer; R i+1 is the radius of the (i+1)th layer of conductor; ε is the equivalent dielectric constant of the combined medium between the coil and the core; l is the effective axial length of the two layers of conductor.

[0076] Another embodiment of the present application provides a system for suppressing ferromagnetic resonance of a broadband electromagnetic voltage transformer, such as Figure 7 As shown, the system 70 includes: an inter-turn capacitance calculation module 701 , an inter-layer capacitance calculation module 702 , and a capacitance optimization module 703 .

[0077] The inter-turn capacitance calculation module 701 is used to establish an inter-turn capacitance equivalent circuit and calculate its value;

[0078] Interlayer capacitance calculation module 702, used to establish an interlayer capacitance equivalent circuit and calculate its value;

[0079] The capacitance optimization module 703 can optimize the width of the high-voltage coil according to the calculation results of the inter-turn and inter-layer capacitance, thereby increasing the capacitance and changing the volt-ampere characteristics.

[0080] The embodiments of this application establish equivalent circuits for inter-turn capacitance and layer capacitance, and calculate inter-turn and inter-layer capacitance based on these circuits. Based on the calculation results, the capacitance of the electromagnetic voltage transformer is increased by optimizing the high-voltage coil width, increasing the number of coil layers, and modifying the volt-ampere characteristics to avoid the occurrence of ferromagnetic resonance.

[0081] Furthermore, the inter-turn capacitance is the distributed capacitance between the turns of the same layer of winding, and the distributed capacitance between different layers of the same winding is called inter-layer capacitance.

[0082] Furthermore, the inter-turn capacitance is in the i-th layer, and each inter-turn capacitance is connected in series. The equivalent inter-turn capacitance C of the i-th unit ti The expression is:

[0083]

[0084] Among them, N i is the number of turns in the i-th layer, C t ' is the inter-turn capacitance, and the inter-turn capacitance between different windings in the same layer is the same.

[0085] Furthermore, when calculating the interlayer capacitance, the layer is used as the calculation unit. The interlayer capacitance reflects the electric field relationship between the current layer and the upper and lower layers. When calculating, it is assumed that there is an equipotential surface between each layer of coils, and the capacitance between each layer is divided into two halves. The interlayer capacitance between the current layer and the upper and lower layers is connected in parallel with the inductance of the current layer.

[0086] Furthermore, the electromagnetic voltage transformer adopts a single-stage graded winding structure.

[0087] Furthermore, the odd-numbered layers of the electromagnetic voltage transformer are wound in layers, and the odd-numbered layer capacitors are divided into C i1 +C i2. The even-numbered layers are wound as a whole layer, and the capacitance between them and the adjacent odd-numbered layers is C (i+1)1 +C (i+1)2 The total series capacitance of the two layers is:

[0088] C i,i+1 =(C i1 +C i2 )×(C (i+1)1 +C (i+1)2 ) / ((C i1 +C i2 )+(C (i+1)1 +C (i+1)2) ).

[0089] Furthermore, the capacitance to ground in the lumped parameter unit of the single-stage voltage transformer is calculated according to the coaxial cylinder formula:

[0090]

[0091] Where: R i is the radius of the conductor in the i-th layer; R i+1 is the radius of the (i+1)th layer of conductor; ε is the equivalent dielectric constant of the combined medium between the coil and the core; l is the effective axial length of the two layers of conductor.

[0092] Another embodiment of the present application provides a terminal, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned method for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer.

[0093] Specifically, a processor may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. A processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0094] Specifically, the processor is connected to the memory via a bus. The bus may include a path for transmitting information. The bus may be a PCI bus or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, etc.

[0095] The memory may be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, or an EEPROM, CD-ROM or other optical disk storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.

[0096] Optionally, the memory is used to store the code of the computer program for executing the solution of the present application, and the execution is controlled by the processor. The processor is used to execute the application code stored in the memory to implement Figure 6 The illustrated embodiment provides an operation for suppressing the ferromagnetic resonance of a wide-band electromagnetic voltage transformer system.

[0097] This application example establishes equivalent circuits for inter-turn and inter-layer capacitance and proposes methods for calculating inter-turn and inter-layer capacitance. Based on the calculation results, by optimizing the high-voltage coil width and increasing the number of coil layers, the capacitance of the electromagnetic voltage transformer is increased, the volt-ampere characteristics are modified, and ferromagnetic resonance is avoided.

[0098] Another embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions for executing the above-mentioned Figure 1 The method for suppressing ferromagnetic resonance of a broadband electromagnetic voltage transformer is shown.

[0099] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.

[0100] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include computer storage media (or non-transitory media) and communication media (or temporary media). As known to those skilled in the art, the term computer storage media is included in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data) and is volatile and non-volatile, removable, and non-removable. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disks (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage, or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0101] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for suppressing ferromagnetic resonance of a broadband electromagnetic voltage transformer, characterized in that: The following steps are involved: The electromagnetic voltage transformer adopts a single-stage graded winding structure; the odd-numbered layers of the electromagnetic voltage transformer are layered wound, and the odd-numbered layer capacitors are divided into C i1 +C i2 The even-numbered layers are wound as a whole layer, and the capacitance between them and the adjacent odd-numbered layers is C (i+1)1 +C (i+1)2 , the total series capacitance of the two layers is: C i,i+1 =(C i1 +C i2 )×(C (i+1)1 +C (i+1)2 ) / ((C i1 +C i2 )+(C (i+1)1 +C (i+1)2 )) The voltage transformer has a lumped parameter unit, and the capacitance to ground in the lumped parameter unit is calculated according to the coaxial cylinder formula: Where: R i is the radius of the conductor in the i-th layer; R i+1 is the radius of the wire in the i+1th layer; l is the effective axial length of the two-layer conductor; Establish an equivalent circuit of the inter-turn capacitance and calculate its value to obtain the calculation result of the inter-turn capacitance; the inter-turn capacitance is the distributed capacitance between the turns of the same layer of winding, and the inter-layer capacitance is the distributed capacitance between different layers of the same winding; the inter-turn capacitance is in the i-th layer, and each inter-turn capacitance is connected in series. The equivalent inter-turn capacitance C of the i-th unit ti The expression is: Among them, N i is the number of turns in the i-th layer, C t ' is the inter-turn capacitance, and the inter-turn capacitance between different windings in the same layer is the same; Establish an equivalent circuit for the interlayer capacitance and calculate its value to obtain the calculated result of the interlayer capacitance. When calculating the interlayer capacitance, the layer is used as the calculation unit. The interlayer capacitance reflects the electric field relationship between the current layer and the upper and lower layers. When calculating, it is assumed that there is an equipotential surface between each layer of coils. The capacitance between each layer is divided into two halves. The interlayer capacitance between the current layer and the upper and lower layers is connected in parallel with the inductance of the current layer. The high-voltage coil wiring width is optimized based on the calculation results of the inter-turn and inter-layer capacitances.

2. A system for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer, applying the method for suppressing ferromagnetic resonance of a wide-band electromagnetic voltage transformer according to claim 1, characterized in that: include: The inter-turn capacitance calculation module is used to establish an inter-turn capacitance equivalent circuit and calculate its value; Interlayer capacitance calculation module, used to establish an interlayer capacitance equivalent circuit and calculate its value; The capacitance optimization module can optimize the high-voltage coil wiring width based on the calculation results of the inter-turn and inter-layer capacitance, thereby increasing the capacitance and changing the volt-ampere characteristics.

3. A terminal comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method of claim 1. 4 . A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the method of claim 1 .

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