Ferroresonance suppression method and device for hybrid double-iron-core voltage transformer

Abstract

The invention provides a ferromagnetic resonance suppression method and device for a hybrid double-iron-core voltage transformer, and the method comprises the steps: arranging double-layer iron cores in the ferromagnetic resonance suppression hybrid double-iron-core voltage transformer to form a nested iron core layer, and enabling the iron core layer to comprise an outer-layer silicon steel sheet and an inner-layer iron-silicon-aluminum alloy; according to the number of turns of the iron core winding, the physical size parameter of the iron core, the applied voltage and the system frequency, the transient magnetic flux density is obtained; the instantaneous iron core loss is obtained according to the transient magnetic flux density, the transient system frequency and the inherent properties of the mixed iron core, and the inherent properties of the iron core layer comprise the hysteresis loss coefficient, the magnetic induced loss index and the eddy current loss coefficient of the iron core layer; according to the transient magnetic flux density, the first magnetic flux density and the second magnetic flux density, the silicon steel sheet adjustment proportion in the iron core is obtained; according to the actual iron core loss and the iron core loss threshold value, the proportion of the iron-silicon-aluminum alloy in the iron core is obtained; and obtaining a comprehensive adjustment proportion according to the silicon steel sheet adjustment proportion in the iron core and the iron-silicon-aluminum alloy proportion in the iron core.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment parameter optimization technology, and in particular to a method and device for suppressing ferroresonance in a hybrid dual-core voltage transformer. Background Technology

[0002] In power systems, voltage transformers are critical measurement and protection devices, and their performance directly affects the safe and stable operation of the system. However, in distribution networks with ungrounded neutral points or grounded via arc suppression coils, the interaction between electromagnetic voltage transformers and line-to-ground capacitance can easily induce ferroresonance, leading to core saturation and subsequently overvoltage and overcurrent. In severe cases, this can damage equipment or even cause system failures. Traditional suppression methods, such as adding damping resistors and harmonic suppression devices, can alleviate resonance problems, but they suffer from drawbacks such as slow response speed and high additional losses, and it is difficult to balance measurement accuracy with resonance suppression effectiveness. Existing voltage transformers mostly use a single core structure with fixed magnetic circuit characteristics, making it difficult to adaptively adjust excitation characteristics to suppress ferroresonance under different operating conditions. Furthermore, traditional designs lack systematic optimization methods for core material selection and parameter matching, resulting in a contradiction between suppressing resonance and ensuring measurement accuracy: on the one hand, high-permeability materials can improve measurement sensitivity but easily exacerbate the risk of core saturation; on the other hand, low-permeability materials, while suppressing resonance, reduce measurement accuracy. Summary of the Invention

[0003] To address the aforementioned problems in related technologies, embodiments of the present invention provide a method and device for suppressing ferroresonance in a hybrid dual-core voltage transformer.

[0004] In a first aspect, embodiments of the present invention provide a method for suppressing ferromagnetic resonance in a hybrid dual-core voltage transformer, comprising: within the ferromagnetic resonance-suppressing hybrid dual-core voltage transformer, forming a nested core layer with two core layers, the core layer comprising an outer silicon steel sheet and an inner iron-silicon-aluminum alloy; obtaining the transient magnetic flux density based on the number of turns of the core winding, the physical dimensional parameters of the core, the applied voltage, and the system frequency; and obtaining the instantaneous core loss based on the transient magnetic flux density, the transient system frequency, and the inherent properties of the hybrid core, and the core layer... The inherent properties include the hysteresis loss coefficient, magnetostrictive loss index, and eddy current loss coefficient of the core layer; the adjustment ratio of silicon steel sheets in the core is obtained based on the transient magnetic flux density, the first magnetic flux density, and the second magnetic flux density; the ratio of iron-silicon-aluminum alloy in the core is obtained based on the actual core loss and the core loss threshold; and a comprehensive adjustment ratio is obtained based on the adjustment ratio of silicon steel sheets in the core and the ratio of iron-silicon-aluminum alloy in the core, ensuring that the real-time magnetic flux density falls within the range of the first and second magnetic flux densities, and that the actual core loss is reduced to below the core loss threshold.

[0005] Based on the above method embodiments, the hybrid dual-core voltage transformer ferroresonance suppression method provided in this embodiment of the invention uses a U-shaped nesting structure for the dual-core.

[0006] Based on the above method embodiments, the hybrid dual-core voltage transformer ferromagnetic resonance suppression method provided in this embodiment of the invention, wherein the transient magnetic flux density is obtained based on the number of turns of the core winding, the physical size parameters of the core, the applied voltage, and the system frequency, includes:

[0007]

[0008] Where B is the instantaneous magnetic flux density; U e π is the rated operating voltage of the voltage transformer; f is the instantaneous system frequency; N is the number of turns of the iron core coil; and A is the cross-sectional area of ​​the iron core.

[0009] Based on the above method embodiments, the ferroresonant suppression method for hybrid dual-core voltage transformers provided in this embodiment of the invention, wherein the instantaneous core loss is obtained based on the transient magnetic flux density, transient system frequency, and inherent properties of the hybrid core, includes:

[0010] P = k h fB α +k e f 2 B 2

[0011] Where P is the actual core loss; k h α is the hysteresis loss coefficient; k is the hysteresis loss exponent; e This is the eddy current loss coefficient.

[0012] Based on the above method embodiments, the ferroresonance suppression method for a hybrid dual-core voltage transformer provided in this embodiment of the invention, wherein the adjustment ratio of silicon steel sheets in the core is obtained based on transient magnetic flux density, first magnetic flux density, and second magnetic flux density, includes:

[0013]

[0014] Where x is the adjustment ratio of silicon steel sheets in the iron core under the influence of magnetic flux density; B1 is the transient magnetic flux density of the silicon steel sheets; B2 is the transient magnetic flux density of the iron-silicon-aluminum alloy; B max B is the first magnetic flux density; min This represents the second magnetic flux density.

[0015] Based on the above method embodiments, the ferroresonance suppression method for hybrid dual-core voltage transformers provided in this invention includes obtaining the proportion of iron-silicon-aluminum alloy in the core based on the actual core loss and the core loss threshold, comprising:

[0016]

[0017] Where y is the proportion of iron-silicon-aluminum alloy in the core under the influence of core loss; P1 is the core loss of silicon steel sheet; P2 is the core loss of iron-silicon-aluminum alloy; P standard This is the core loss threshold.

[0018] Based on the above method embodiments, the ferroresonance suppression method for hybrid dual-core voltage transformers provided in this embodiment of the invention, wherein the comprehensive adjustment ratio is obtained based on the adjustment ratio of silicon steel sheets in the core and the ratio of iron-silicon-aluminum alloy in the core, includes:

[0019] u = w1x + w2y

[0020] 1 = w1 + w2

[0021] w1 > w2

[0022] Where u is the overall adjustment ratio; w1 is the weighting coefficient of the adjustment ratio affected by magnetic flux density; and w2 is the weighting coefficient of the adjustment ratio affected by core loss.

[0023] Secondly, embodiments of the present invention provide a ferroresonant suppression device for a hybrid dual-core voltage transformer, comprising: a first main module for realizing the nested core layer formed by setting a double-core core inside the ferroresonant suppression hybrid dual-core voltage transformer, wherein the core layer includes an outer silicon steel sheet and an inner iron-silicon-aluminum alloy; a second main module for realizing the transient magnetic flux density based on the number of turns of the core winding, the physical size parameters of the core, the applied voltage, and the system frequency; and a third main module for realizing the instantaneous core loss based on the transient magnetic flux density, the transient system frequency, and the inherent properties of the hybrid core, and the core layer... The inherent properties include the hysteresis loss coefficient, magnetostrictive loss index, and eddy current loss coefficient of the core layer; the fourth main module is used to obtain the adjustment ratio of silicon steel sheets in the core based on the transient magnetic flux density, the first magnetic flux density, and the second magnetic flux density; the fifth main module is used to obtain the ratio of iron-silicon-aluminum alloy in the core based on the actual core loss and the core loss threshold; the sixth main module is used to obtain a comprehensive adjustment ratio based on the adjustment ratio of silicon steel sheets in the core and the ratio of iron-silicon-aluminum alloy in the core, ensuring that the real-time magnetic flux density falls within the range of the first and second magnetic flux densities, and that the actual core loss is reduced to below the core loss threshold.

[0024] Thirdly, embodiments of the present invention provide an electronic device, comprising:

[0025] At least one processor, at least one memory, and a communication interface; wherein,

[0026] The processor, memory, and communication interface communicate with each other;

[0027] The memory stores program instructions that can be executed by the processor. The processor calls the program instructions to execute the ferromagnetic resonance suppression method for hybrid dual-core voltage transformers provided by any of the various implementations of the first aspect.

[0028] Fourthly, embodiments of the present invention provide a non-transitory computer-readable storage medium storing computer instructions that cause a computer to execute a method for suppressing ferromagnetic resonance in a hybrid dual-core voltage transformer provided in any of the various implementations of the first aspect.

[0029] The hybrid dual-core voltage transformer ferroresonance suppression method and device provided in this invention utilizes a hybrid dual-core nested structure to ensure normal measurement accuracy by leveraging the high magnetic permeability of silicon steel sheets and the wide linear magnetization characteristics of iron-silicon-aluminum alloy to suppress core saturation, effectively reducing ferroresonance; optimizing core loss distribution, reducing heat generation, and extending the lifespan of the voltage transformer; requiring no additional harmonic suppression device, suitable for upgrading existing equipment and manufacturing new equipment, improving the safety and stability of power systems. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the process for suppressing ferroresonance in a hybrid dual-core voltage transformer according to an embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the structure of the hybrid dual-core voltage transformer ferroresonance suppression device provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In addition, the technical features of the various embodiments or individual embodiments provided by the present invention can be arbitrarily combined to form feasible technical solutions. Such combinations are not constrained by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention. If there are step numbers in the following embodiments, they are only set for ease of explanation and the order between steps is not limited. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0035] This invention provides a method for suppressing ferroresonance in a hybrid dual-core voltage transformer, see [link to relevant documentation]. Figure 1 The method includes: setting a nested core layer with two core layers inside a hybrid dual-core voltage transformer for suppressing ferromagnetic resonance, wherein the core layer includes an outer layer of silicon steel sheets and an inner layer of iron-silicon-aluminum alloy; obtaining the transient magnetic flux density based on the number of turns of the core winding, the physical size parameters of the core, the applied voltage, and the system frequency; obtaining the instantaneous core loss based on the transient magnetic flux density, the transient system frequency, and the inherent properties of the hybrid core, wherein the inherent properties of the core layer include the hysteresis loss coefficient, the magnetostrictive loss index, and the eddy current loss coefficient of the core layer; obtaining the silicon steel sheet adjustment ratio in the core based on the transient magnetic flux density, the first magnetic flux density, and the second magnetic flux density; obtaining the proportion of iron-silicon-aluminum alloy in the core based on the actual core loss and the core loss threshold; and obtaining a comprehensive adjustment ratio based on the silicon steel sheet adjustment ratio and the proportion of iron-silicon-aluminum alloy in the core to ensure that the real-time magnetic flux density falls within the range of the first and second magnetic flux densities, and that the actual core loss is reduced to below the core loss threshold.

[0036] Based on the above method embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonance suppression method provided in this embodiment of the invention uses a U-shaped nesting structure for the dual-core.

[0037] A nested core layer is formed by setting two core layers inside a hybrid dual-core voltage transformer to suppress ferroresonance. The core materials include an outer layer of silicon steel sheets and an inner layer of iron-silicon-aluminum alloy. The transient magnetic flux density is obtained by acquiring the number of turns of the core winding, the physical dimensions of the core, the applied voltage, and the system frequency. The instantaneous core loss is obtained based on the transient magnetic flux density, the transient system frequency, and the inherent characteristics of the hybrid core, including the hysteresis loss coefficient, the magnetostrictive loss index, and the eddy current loss coefficient of the core.

[0038] Based on the above method embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferromagnetic resonance suppression method provided in this embodiment of the invention, wherein the transient magnetic flux density is obtained based on the number of turns of the core winding, the physical size parameters of the core, the applied voltage, and the system frequency, includes:

[0039]

[0040] Where B is the instantaneous magnetic flux density; U e π is the rated operating voltage of the voltage transformer; f is the instantaneous system frequency; N is the number of turns of the iron core coil; and A is the cross-sectional area of ​​the iron core.

[0041] Based on the instantaneous magnetic flux density and its highest and lowest thresholds, as well as the actual core loss and its threshold, a comprehensive adjustment ratio is generated to adjust the proportion of silicon steel sheets and iron-silicon-aluminum alloy in the core. This ensures that the real-time magnetic flux density is within the range of the highest and lowest magnetic flux density, and that the real-time core loss is reduced below the threshold. Its characteristics are: the core layer is formed by two nested cores; the outer core uses silicon steel sheets, and the inner core uses iron-silicon-aluminum alloy, with a U-shaped nesting structure. The generated magnetic flux density is shown in Figure B.

[0042] Based on the above method embodiments, as an optional embodiment, the ferroresonant suppression method for hybrid dual-core voltage transformers provided in this embodiment of the invention, wherein the instantaneous core loss is obtained based on the transient magnetic flux density, transient system frequency, and inherent properties of the hybrid core, includes:

[0043] P = k h fB α +k e f 2 B 2

[0044] Where P is the actual core loss; k h α is the hysteresis loss coefficient; k is the hysteresis loss exponent; e This is the eddy current loss coefficient.

[0045] This invention utilizes the high magnetic permeability of silicon steel sheets and the wide linear magnetization of iron-silicon-aluminum alloys. By optimizing the magnetic circuit distribution through a nested structure, the current transformer maintains high measurement accuracy during normal operation. Under overvoltage or resonance conditions, the iron-silicon-aluminum alloy portion can delay core saturation and reduce excitation current surges, thereby effectively suppressing ferroresonance and preventing system overvoltage and PT burnout accidents.

[0046] Based on the above method embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonance suppression method provided in this embodiment of the invention, wherein the adjustment ratio of silicon steel sheets in the core is obtained according to the transient magnetic flux density, the first magnetic flux density, and the second magnetic flux density, includes:

[0047]

[0048] Where x is the adjustment ratio of silicon steel sheets in the iron core under the influence of magnetic flux density; B1 is the transient magnetic flux density of the silicon steel sheets; B2 is the transient magnetic flux density of the iron-silicon-aluminum alloy; B max B is the first magnetic flux density; min This represents the second magnetic flux density.

[0049] The BH curve of a traditional single-core voltage transformer changes drastically in the saturation region. However, the hybrid dual-core structure of this invention, through the synergistic effect of silicon steel sheets (high permeability, easy to saturate) and iron-silicon-aluminum alloy (low permeability, wide linearity), makes the overall BH curve exhibit a smoother transition characteristic, reduces the nonlinear distortion of the excitation current, and thus reduces the probability of resonance.

[0050] Based on the above method embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonance suppression method provided in this embodiment of the invention, wherein obtaining the proportion of iron-silicon-aluminum alloy in the core according to the actual core loss and the core loss threshold includes:

[0051]

[0052] Where y is the proportion of iron-silicon-aluminum alloy in the core under the influence of core loss; P1 is the core loss of silicon steel sheet; P2 is the core loss of iron-silicon-aluminum alloy; P standard This is the core loss threshold.

[0053] During normal operation, the silicon steel sheet section provides a high magnetic permeability path, ensuring the measurement accuracy of the voltage transformer; while under transient overvoltage or resonance conditions, the iron-silicon-aluminum alloy section can limit the growth of magnetic flux, avoid deep saturation of the iron core, and ensure that the transformer can still provide an effective signal during faults, thereby improving the reliability of relay protection.

[0054] Based on the above method embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonance suppression method provided in this embodiment of the invention, wherein obtaining a comprehensive adjustment ratio based on the adjustment ratio of silicon steel sheets in the core and the ratio of iron-silicon-aluminum alloy in the core, includes:

[0055] u = w1x + w2y

[0056] 1 = w1 + w2

[0057] w1 > w2

[0058] Where u is the overall adjustment ratio; w1 is the weighting coefficient of the adjustment ratio affected by magnetic flux density; and w2 is the weighting coefficient of the adjustment ratio affected by core loss.

[0059] Iron-silicon-aluminum alloys have low eddy current losses and high resistivity. When combined with silicon steel sheets, they can optimize the distribution of hysteresis and eddy current losses in the iron core, reduce heat generation, improve heat dissipation efficiency, thereby reducing equipment temperature rise, extending the service life of voltage transformers, and reducing maintenance costs.

[0060] The ferroresonance suppression method for hybrid dual-core voltage transformers provided in this invention utilizes a hybrid dual-core nested structure. It leverages the high magnetic permeability of silicon steel sheets to ensure normal measurement accuracy, and utilizes the wide linear magnetization characteristics of iron-silicon-aluminum alloys to suppress core saturation, effectively reducing ferroresonance. It also optimizes core loss distribution, reduces heat generation, and extends the lifespan of the voltage transformer. Furthermore, it requires no additional harmonic suppression device, making it suitable for upgrading existing equipment and manufacturing new equipment, thereby improving the safety and stability of power systems.

[0061] The present invention also provides a hybrid dual-core voltage transformer for suppressing ferroresonance, characterized in that: the transformer has a nested structure of double-core, the outer core is made of silicon steel sheet, the inner core is made of iron-silicon-aluminum alloy, the nesting method is a U-shaped nesting, and the ratio of the two cores is controlled by the above-mentioned parameter optimization method for suppressing ferroresonance hybrid dual-core voltage transformer.

[0062] The nested U-shaped structure of the present invention is an optimization based on the traditional voltage transformer core. It does not require an additional harmonic suppression device, has a compact structure, and is suitable for the transformation of existing electromagnetic PTs or the manufacture of new equipment, thus having high engineering practical value.

[0063] The implementation of the various embodiments of this invention is based on programmed processing (i.e., software) using a device with processor functionality. Therefore, in practical engineering, the technical solutions and functions of the various embodiments of this invention can be encapsulated into various modules. Based on this reality, and building upon the above embodiments, this invention provides a hybrid dual-core voltage transformer ferroresonance suppression device, which is used to execute the hybrid dual-core voltage transformer ferroresonance suppression method in the above method embodiments. See also... Figure 2 The device includes: a first main module for setting a nested core layer with two core layers inside a hybrid dual-core voltage transformer for suppressing ferroresonant resonance, wherein the core layer includes an outer silicon steel sheet and an inner iron-silicon-aluminum alloy; a second main module for obtaining the transient magnetic flux density based on the number of turns of the core winding, the physical dimensions of the core, the applied voltage, and the system frequency; and a third main module for obtaining the instantaneous core loss based on the transient magnetic flux density, the transient system frequency, and the inherent properties of the hybrid core, wherein the inherent properties of the core layer include the hysteresis loss coefficient of the core layer. The system comprises six main modules: a first main module for determining the magnetostriction index and the eddy current loss coefficient; a second main module for determining the silicon steel sheet adjustment ratio in the core based on the transient magnetic flux density, the first magnetic flux density, and the second magnetic flux density; a third main module for determining the iron-silicon-aluminum alloy ratio in the core based on the actual core loss and the core loss threshold; and a fourth main module for determining the iron-silicon-aluminum alloy ratio in the core based on the silicon steel sheet adjustment ratio and the iron-silicon-aluminum alloy ratio in the core, thereby ensuring that the real-time magnetic flux density falls within the range of the first and second magnetic flux densities and that the actual core loss is reduced to below the core loss threshold.

[0064] The hybrid dual-core voltage transformer ferroresonance suppression device provided in this embodiment of the invention employs... Figure 2 Several modules within the system utilize a hybrid double-core nested structure. The high magnetic permeability of silicon steel sheets ensures normal measurement accuracy, while the wide linear magnetization characteristics of iron-silicon-aluminum alloy suppress core saturation, effectively reducing ferroresonance. The system optimizes core loss distribution, reduces heat generation, and extends the lifespan of voltage transformers. No additional harmonic suppression devices are required, making it suitable for upgrading existing equipment and manufacturing new equipment, thereby improving the safety and stability of power systems.

[0065] It should be noted that the apparatus in the device embodiments provided by the present invention can be used not only to implement the methods in the above method embodiments, but also to implement the methods in other method embodiments provided by the present invention. The difference lies only in setting corresponding functional modules (i.e., software). Its principle is basically the same as that of the above device embodiments provided by the present invention. As long as those skilled in the art, based on the above device embodiments and referring to the specific technical solutions in other method embodiments, obtain corresponding technical means and technical solutions composed of these technical means by combining technical features, and under the premise of ensuring the practicality of the technical solution, they can improve the apparatus in the above device embodiments to obtain corresponding device-type embodiments (i.e., software) for implementing the methods in other method-type embodiments. For example:

[0066] Based on the above device embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferromagnetic resonance suppression device provided in this embodiment of the invention further includes: a first sub-module, used to realize that the nesting method of the dual-core is a U-shaped nesting structure.

[0067] Based on the above-described device embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonant suppression device provided in this embodiment further includes: a second submodule, used to realize the calculation of transient magnetic flux density based on the number of turns of the core winding, the physical size parameters of the core, the applied voltage, and the system frequency, including:

[0068]

[0069] Where B is the instantaneous magnetic flux density; U e π is the rated operating voltage of the voltage transformer; f is the instantaneous system frequency; N is the number of turns of the iron core coil; and A is the cross-sectional area of ​​the iron core.

[0070] Based on the above-described device embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonant suppression device provided in this invention further includes: a third submodule, used to obtain the instantaneous core loss based on the transient magnetic flux density, transient system frequency, and the inherent properties of the hybrid core, including:

[0071] P = k h fB α +k e f 2 B 2

[0072] Where P is the actual core loss; k h α is the hysteresis loss coefficient; k is the hysteresis loss exponent; e This is the eddy current loss coefficient.

[0073] Based on the above-described device embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonant suppression device provided in this embodiment further includes: a fourth sub-module, used to realize the determination of the silicon steel sheet adjustment ratio in the core based on the transient magnetic flux density, the first magnetic flux density, and the second magnetic flux density, including:

[0074]

[0075] Where x is the adjustment ratio of silicon steel sheets in the iron core under the influence of magnetic flux density; B1 is the transient magnetic flux density of the silicon steel sheets; B2 is the transient magnetic flux density of the iron-silicon-aluminum alloy; B max B is the first magnetic flux density; min This represents the second magnetic flux density.

[0076] Based on the above-described device embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonance suppression device provided in this invention further includes: a fifth sub-module, used to realize the determination of the proportion of iron-silicon-aluminum alloy in the core based on the actual core loss and the core loss threshold, including:

[0077]

[0078] Where y is the proportion of iron-silicon-aluminum alloy in the core under the influence of core loss; P1 is the core loss of silicon steel sheet; P2 is the core loss of iron-silicon-aluminum alloy; P standard This is the core loss threshold.

[0079] Based on the above-described device embodiments, as an optional embodiment, the hybrid dual-core voltage transformer ferroresonance suppression device provided in this embodiment further includes: a sixth sub-module, used to realize the comprehensive adjustment ratio obtained based on the adjustment ratio of silicon steel sheets in the core and the ratio of iron-silicon-aluminum alloy in the core, including:

[0080] u = w1x + w2y

[0081] 1 = w1 + w2

[0082] w1 > w2

[0083] Where u is the overall adjustment ratio; w1 is the weighting coefficient of the adjustment ratio affected by magnetic flux density; and w2 is the weighting coefficient of the adjustment ratio affected by core loss.

[0084] The method in this embodiment of the invention is implemented using an electronic device; therefore, it is necessary to introduce the relevant electronic device. For this purpose, this embodiment of the invention provides an electronic device, such as... Figure 3 As shown, the electronic device includes at least one processor, a communications interface, at least one memory, and a communications bus, wherein the at least one processor, the communications interface, and the at least one memory communicate with each other via the communications bus. The at least one processor can invoke logical instructions stored in the at least one memory to execute all or part of the steps of the methods provided in the foregoing method embodiments.

[0085] Furthermore, when the logical instructions in at least one of the aforementioned memories can be implemented as software functional units and sold or used as independent products, they 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 related technologies, or a portion 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 to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various method embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0086] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The 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 the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0087] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. These computer software products can be stored in computer-readable storage media, such as ROM / RAM, magnetic disks, optical disks, etc., and include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0088] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. Based on this understanding, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, or sometimes in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0089] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Any expressions such as "predetermined threshold," "preset threshold," etc., without specifying a particular value, can be determined by those skilled in the art through simple experimentation or appropriate adjustments.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for suppressing ferroresonance in a hybrid dual-core voltage transformer, characterized in that, include: Inside a hybrid dual-core voltage transformer designed to suppress ferromagnetic resonance, a nested core layer is formed by two core layers, comprising an outer layer of silicon steel sheets and an inner layer of iron-silicon-aluminum alloy. The transient magnetic flux density is obtained based on the number of turns in the core winding, the physical dimensions of the core, the applied voltage, and the system frequency. The instantaneous core loss is obtained based on the transient magnetic flux density, the transient system frequency, and the inherent properties of the hybrid core. These inherent properties include the hysteresis loss coefficient, magnetostrictive loss index, and eddy current loss coefficient of the core layer. The adjustment ratio of the silicon steel sheets in the core is obtained based on the transient magnetic flux density, the first magnetic flux density, and the second magnetic flux density. The proportion of the iron-silicon-aluminum alloy in the core is obtained based on the actual core loss and the core loss threshold. Finally, a comprehensive adjustment ratio is obtained based on the silicon steel sheet adjustment ratio and the iron-silicon-aluminum alloy proportion, ensuring that the real-time magnetic flux density falls within the range of the first and second magnetic flux densities, and that the actual core loss is reduced to below the core loss threshold.

2. The method for suppressing ferroresonance in a hybrid dual-core voltage transformer according to claim 1, characterized in that, The double-layer iron core is nested in a U-shaped nesting structure.

3. The method for suppressing ferroresonance in a hybrid dual-core voltage transformer according to claim 2, characterized in that, The method of obtaining transient magnetic flux density based on the number of turns of the iron core winding, the physical dimensions of the iron core, the applied voltage, and the system frequency includes: Where B is the instantaneous magnetic flux density; U e π is the rated operating voltage of the voltage transformer; f is the instantaneous system frequency; N is the number of turns of the iron core coil; and A is the cross-sectional area of ​​the iron core.

4. The method for suppressing ferroresonance in a hybrid dual-core voltage transformer according to claim 3, characterized in that, The instantaneous core loss is obtained based on the transient magnetic flux density, transient system frequency, and the inherent properties of the hybrid core, including: P=k h fB α +k e f 2 B 2 Where P is the actual core loss; k h α is the hysteresis loss coefficient; k is the hysteresis loss exponent; e This is the eddy current loss coefficient.

5. The method for suppressing ferroresonance in a hybrid dual-core voltage transformer according to claim 4, characterized in that, The process of obtaining the adjustment ratio of silicon steel sheets in the iron core based on transient magnetic flux density, first magnetic flux density, and second magnetic flux density includes: Where x is the adjustment ratio of silicon steel sheets in the iron core under the influence of magnetic flux density; B1 is the transient magnetic flux density of the silicon steel sheets; B2 is the transient magnetic flux density of the iron-silicon-aluminum alloy; B max B is the first magnetic flux density; min This represents the second magnetic flux density.

6. The method for suppressing ferroresonance in a hybrid dual-core voltage transformer according to claim 5, characterized in that, The process of obtaining the proportion of iron-silicon-aluminum alloy in the iron core based on actual core loss and core loss threshold includes: Where y is the proportion of iron-silicon-aluminum alloy in the core under the influence of core loss; P1 is the core loss of silicon steel sheet; P2 is the core loss of iron-silicon-aluminum alloy; P standard This is the core loss threshold.

7. The method for suppressing ferroresonance in a hybrid dual-core voltage transformer according to claim 6, characterized in that, The comprehensive adjustment ratio is obtained based on the adjustment ratio of silicon steel sheets in the iron core and the ratio of iron-silicon-aluminum alloy in the iron core, including: u = w1x + w2y 1 = w1 + w2 w1 > w2 Where u is the overall adjustment ratio; w1 is the weighting coefficient of the adjustment ratio affected by magnetic flux density; and w2 is the weighting coefficient of the adjustment ratio affected by core loss.

8. A ferroresonance suppression device for a hybrid dual-core voltage transformer, characterized in that, include: The first main module is used to implement a nested core layer with two core layers inside the hybrid dual-core voltage transformer for suppressing ferromagnetic resonance. The core layer includes an outer silicon steel sheet and an inner iron-silicon-aluminum alloy. The second main module is used to obtain the transient magnetic flux density based on the number of turns of the core winding, the physical dimensions of the core, the applied voltage, and the system frequency. The third main module is used to obtain the instantaneous core loss based on the transient magnetic flux density, the transient system frequency, and the inherent properties of the hybrid core. The inherent properties of the core layer include the hysteresis loss coefficient and magnetically induced loss coefficient. The system comprises six main modules: a first main module for calculating the loss index and eddy current loss coefficient; a second main module for calculating the silicon steel sheet adjustment ratio in the core based on transient magnetic flux density, a first magnetic flux density, and a second magnetic flux density; a third main module for calculating the iron-silicon-aluminum alloy ratio in the core based on actual core loss and a core loss threshold; and a fourth main module for calculating a comprehensive adjustment ratio based on the silicon steel sheet adjustment ratio and the iron-silicon-aluminum alloy ratio in the core, ensuring that the real-time magnetic flux density falls within the range of the first and second magnetic flux densities, and that the actual core loss is reduced to below the core loss threshold.

9. An electronic device, characterized in that, include: At least one processor, at least one memory, and a communication interface; wherein, The processor, memory, and communication interface communicate with each other; The memory stores program instructions that can be executed by the processor, which invokes the program instructions to perform the method described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions that cause the computer to perform the method described in any one of claims 1 to 7.

Images