Magnetostriction self-elimination type extra-high voltage shunt reactor and regulation and control method

Abstract

The invention provides a magnetostriction self-elimination type extra-high voltage shunt reactor and a regulation and control method, and relates to the technical field of electrical equipment regulation and control. A plurality of layers of iron cores are stacked in the reactor, oriented silicon steel and non-oriented silicon steel materials are selected, and an iron core layer is constructed; current and voltage data of the reactor are collected in real time, real-time magnetic flux density is calculated based on the number of turns, the sectional area, the voltage and the power frequency of an iron core, and then real-time iron core loss and vibration noise are calculated. Real-time magnetic flux density, iron core loss and vibration noise are comprehensively evaluated and compared with respective threshold values, and the proportion of oriented silicon steel and non-oriented silicon steel in the iron core is dynamically adjusted, so that the magnetic flux density is kept in a safe range, meanwhile, the iron core loss and the vibration noise are reduced, and the service life of the iron core is prolonged. A comprehensive adjustment proportion is generated by combining the adjustment proportions of the three parameters and used for adjusting the proportion of oriented silicon steel in the iron core layer, and the purpose of optimizing the performance of the electric reactor is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment control, and in particular to a magnetostrictive self-eliminating ultra-high voltage shunt reactor and a control method thereof. Background Art

[0002] In the UHV power transmission system, the performance of the reactor as an important power equipment directly affects the stability and safety of the system. However, the traditional reactor will produce significant core loss and vibration noise during operation, especially in the high-frequency and high-voltage operating environment, these problems are more prominent. The selection and design of the core material has an important impact on the performance of the reactor. The existing technology is difficult to take into account the high efficiency and low noise characteristics of the reactor. Especially in high-load operation, the magnetostrictive effect of the core will cause additional mechanical vibration and noise, which will affect the user experience and the maintenance cost of the equipment.

[0003] Existing UHV shunt reactors usually use a single material to form the core, resulting in a lack of flexibility in performance control. On the one hand, the selection of core materials needs to take into account both magnetic conductivity and processing characteristics. On the other hand, the temperature, loss, and noise characteristics of the reactor under different working conditions are difficult to monitor and adjust in real time, resulting in low efficiency of the reactor in practical applications. Therefore, how to optimize the selection and stacking of core materials through intelligent control methods and realize adaptive adjustment of reactors is a technical problem that needs to be solved urgently in the current technical field.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0005] The object of the present invention is to provide a magnetostrictive self-eliminating ultra-high voltage shunt reactor and a control method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for controlling a magnetostrictive self-eliminating ultra-high voltage shunt reactor, the specific steps comprising: Step 1: stacking multiple layers of iron cores inside the magnetostriction elimination type UHV shunt reactor to form an iron core layer, wherein the material of the iron core includes oriented silicon steel and non-oriented silicon steel; Step 2: Generate real-time magnetic flux density based on the number of turns, cross-sectional area, voltage and power frequency of the iron core, generate real-time core loss based on the real-time magnetic flux density, power frequency and iron core characteristics, and generate real-time vibration noise based on the real-time magnetic flux density and magnetostriction coefficient of the iron core, wherein the iron core characteristics include hysteresis loss coefficient, magnetostriction loss index and eddy current loss coefficient of the iron core; Step 3: Based on the real-time magnetic flux density and the maximum magnetic flux density and the minimum magnetic flux density, the actual core loss and the core loss threshold, the actual vibration noise and the vibration noise threshold, generate a comprehensive adjustment ratio to adjust the ratio of oriented silicon steel and non-oriented silicon steel in the core, so that the real-time magnetic flux density is within the range of the maximum magnetic flux density and the minimum magnetic flux density, and the real-time core loss and the real-time vibration noise are reduced below the threshold.

[0007] Furthermore, the iron core layer is composed of a plurality of iron cores, some of which are made of oriented silicon steel materials, and other parts of which are made of non-oriented silicon steel materials, and the stacking method is alternating stacking.

[0008] Furthermore, the formula for generating the magnetic flux density is: ; in, Indicates the real-time magnetic flux density, Indicates the rated working voltage of the reactor. Indicates the real-time power frequency, Indicates the number of turns of the core coil, Indicates the cross-sectional area of ​​the core; The formula for generating core losses is: ; in, Indicates the real-time core loss, represents the hysteresis loss coefficient, represents the hysteresis loss index, represents the eddy current loss coefficient; The formula for generating vibration noise is: ; in, Represents real-time vibration noise, represents the magnetostriction coefficient, represents the reference magnetic flux density, and .

[0009] Furthermore, the principle for generating a comprehensive adjustment ratio to adjust the ratio of oriented silicon steel to non-oriented silicon steel in the core is: The formula for calculating the adjustment ratio of oriented silicon steel based on magnetic flux density is: ; in, Indicates the adjustment ratio of oriented silicon steel under the influence of magnetic flux density, Indicates the magnetic flux density of oriented silicon steel, Represents the magnetic flux density of non-oriented silicon steel, Represents the maximum magnetic flux density, represents the minimum magnetic flux density, Indicates the current proportion of oriented silicon steel; The formula for calculating the adjustment ratio of oriented silicon steel based on core loss is: ; in, Indicates the adjustment ratio of oriented silicon steel under the influence of core loss, Indicates the core loss of oriented silicon steel. Indicates the core loss of non-oriented silicon steel, Indicates the core loss threshold; The formula for calculating the adjustment ratio of oriented silicon steel based on vibration noise is: ; in, Indicates the adjustment ratio of oriented silicon steel under the influence of vibration and noise, Indicates the vibration noise of oriented silicon steel. Indicates the noise and vibration of non-oriented silicon steel. Indicates the noise vibration threshold; Combining magnetic flux density, core loss and vibration noise, the formula for generating a comprehensive adjustment ratio is: ; in, represents the comprehensive adjustment ratio, They represent the weight coefficients of the adjustment ratios of the magnetic flux density, core loss, and vibration noise, respectively. ,and ; The proportion of oriented silicon steel after comprehensive adjustment is: ; in, Indicates the proportion of oriented silicon steel after adjustment, Indicates the proportion of oriented silicon steel before adjustment.

[0010] The present invention also provides a magnetostrictive self-eliminating ultra-high voltage shunt reactor, wherein the reactor has a stacked structure of multiple layers of iron core cakes, part of the iron core cakes are made of oriented silicon steel sheets, and the other part of the iron core cakes are made of non-oriented silicon steel sheets, and the ratio of the iron core cakes is controlled by the above-mentioned magnetostrictive self-eliminating ultra-high voltage shunt reactor control method.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention calculates the real-time magnetic flux density, core loss and vibration noise based on the collected current and voltage data, realizes dynamic monitoring of the operation state of the reactor, can timely feedback the operation state of the reactor, ensure that the magnetic flux density does not exceed the saturation point of the material, and avoid overheating or damage to the equipment. The core loss can reflect the loss changes under different working conditions, and timely discover the problem of excessive core loss caused by the design structure; the magnetic flux density is related to the magnetostrictive effect of the core in the sea area, and the magnetic flux density can also reflect the vibration noise caused by magnetostriction. The mechanical faults in the working process of the reactor can be timely identified through the vibration noise, so as to adjust the internal structure of the reactor and improve the safety of the reactor.

[0012] The present invention also generates adjustment ratios to adjust the ratio of oriented silicon steel and non-oriented silicon steel by comparing the real-time magnetic flux density with the maximum magnetic flux density and the minimum magnetic flux density, the actual core loss with the core loss threshold, and the actual vibration noise with the vibration noise threshold. Oriented silicon steel has better magnetic permeability in a specific direction and can reduce the loss of magnetic flux density; while non-oriented silicon steel is uniform in all directions. By adjusting the ratio, the magnetic properties of the reactor can be optimized under different load and frequency conditions, its working efficiency can be improved, and stable reactor performance can be maintained; the superior performance of oriented silicon steel helps to reduce hysteresis loss, while non-oriented silicon steel can reduce eddy current loss in structure. Adjusting the ratio of the two can effectively reduce the overall core loss and improve energy efficiency while maintaining good magnetic properties, directly leading to a reduction in heat generation, thereby reducing the temperature rise of the equipment, extending the service life of the equipment, and reducing maintenance costs; different types of silicon steel have differences in magnetostrictive characteristics, and adjusting the ratio of oriented and non-oriented silicon steel can make the vibration characteristics of the core more balanced during operation, thereby reducing vibration noise, reducing mechanical failures caused by vibration, and thus improving the overall stability and durability of the equipment. It can ensure that the reactor is always in the best working condition, so that the reactor can adapt to the changing needs of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the method flow of an embodiment of the present invention. DETAILED DESCRIPTION

[0014] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0015] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0016] Example: See also Figure 1 , the present invention provides a technical solution: A method for controlling a magnetostrictive self-eliminating ultra-high voltage shunt reactor, the specific steps comprising: Step 1: stacking multiple layers of iron cores inside the magnetostriction elimination type UHV shunt reactor to form an iron core layer, wherein the material of the iron core includes oriented silicon steel and non-oriented silicon steel; In this embodiment, the iron core layer is composed of a plurality of iron cores, some of which are made of oriented silicon steel material, and the other part of which are made of non-oriented silicon steel material, and the stacking method is alternating stacking.

[0017] The initial iron core is stacked alternately according to the stacking ratio of oriented silicon steel material to non-oriented silicon steel material of 1:1, and an insulating layer is added between each layer of the iron core to prevent eddy current loss and local overheating; alternating stacking means that oriented silicon steel and non-oriented silicon steel are stacked alternately according to the stacking ratio, such as one layer of oriented silicon steel + one layer of non-oriented silicon steel or two layers of oriented silicon steel + one layer of non-oriented silicon steel.

[0018] Step 2: Generate real-time magnetic flux density based on the number of turns, cross-sectional area, voltage and power frequency of the iron core, generate real-time core loss based on the real-time magnetic flux density, power frequency and iron core characteristics, and generate real-time vibration noise based on the real-time magnetic flux density and magnetostriction coefficient of the iron core, wherein the iron core characteristics include hysteresis loss coefficient, magnetostriction loss index and eddy current loss coefficient of the iron core; In this embodiment, the formula for generating the magnetic flux density is: ; in, Indicates the real-time magnetic flux density, Indicates the rated working voltage of the reactor. Indicates the real-time power frequency, Indicates the number of turns of the core coil, Indicates the cross-sectional area of ​​the core; In an AC system, the peak value of the AC voltage With rated working voltage The relationship between ,Right now , , , so ,in, It represents magnetic flux; magnetic flux density reflects the amount of magnetic flux per unit area. The greater the magnetic flux density, the greater the magnetic field strength. When the magnetic flux density is close to the saturation magnetic flux density of the core material, the core will enter a saturated state, resulting in a sharp increase in loss. By controlling the magnetic flux density, the core loss and vibration noise of the reactor can be optimized. An increase in voltage will lead to an increase in magnetic field strength, thereby increasing the magnetic flux density. The magnetic flux density is proportional to the rated working voltage. Under the same voltage, the higher the power supply frequency, the faster the rate of change of the magnetic flux, and thus the smaller the magnetic flux density. The power supply frequency is inversely proportional to the power supply frequency. An increase in the number of coil turns will disperse the magnetic flux, thereby reducing the magnetic flux density. The number of turns of the core coil is inversely proportional to the magnetic flux density. An increase in cross-sectional area will disperse the magnetic flux, thereby reducing the magnetic flux density. The effective cross-sectional area of ​​the core is inversely proportional to the magnetic flux density.

[0019] The formula for generating core losses is: ; in, Indicates the real-time core loss, represents the hysteresis loss coefficient, represents the hysteresis loss index, represents the eddy current loss coefficient; Core loss is mainly divided into hysteresis loss and eddy current loss. Hysteresis loss means that the core material is repeatedly magnetized in the alternating magnetic field. The change of current causes the change of the material magnetic field, resulting in internal friction and energy dissipation. Eddy current loss is caused by the induced current generated in the conductive material. Under the action of the alternating electric field, the current in the core will form eddy currents. These eddy currents consume energy. The hysteresis loss coefficient It reflects the hysteresis loss of the material at unit frequency and unit magnetic flux density, which is determined by the hysteresis characteristics of the material. The hysteresis loss coefficient of the material is measured by the Epstein circle method and fitted to obtain , hysteresis loss index It reflects the nonlinear dependence of hysteresis loss on magnetic flux density. The size of hysteresis loss index is related to the material. Usually, the hysteresis loss index of oriented silicon steel is 1.6~1.8, and the hysteresis loss index of non-oriented silicon steel is 1.8~2.0; eddy current loss coefficient It reflects the eddy current loss at unit frequency and unit magnetic flux density, which is related to the resistivity and thickness of the material. The higher the resistivity and the thinner the material, The smaller it is, the eddy current loss coefficient of the material is measured by the Epstein square circle method; the hysteresis loss is proportional to the hysteresis loss, power supply frequency, magnetic flux density and hysteresis loss index, and the eddy current loss is proportional to the eddy current loss coefficient, power supply frequency and magnetic flux density.

[0020] The formula for generating vibration noise is: ; in, Represents real-time vibration noise, represents the magnetostriction coefficient, represents the reference magnetic flux density, and ; Vibration noise is mainly caused by magnetostrictive effect. Magnetostrictive effect means that the iron core undergoes periodic deformation under the action of alternating magnetic field, thus generating mechanical vibration and noise. It reflects the deformation ability of the material under the action of an external magnetic field. The value is related to the material. Usually, the magnetostriction coefficient of oriented silicon steel is greater than that of non-oriented silicon steel. It is used to convert the vibration amplitude into decibel value. The larger the magnetostriction coefficient and magnetic flux density, the more obvious the magnetostriction effect and the greater the vibration noise. Usually 1T is used to standardize the vibration and noise levels in different situations. It reflects the change in noise level generated by the reactor under different magnetic flux densities.

[0021] Step 3: Based on the real-time magnetic flux density and the maximum magnetic flux density and the minimum magnetic flux density, the actual core loss and the core loss threshold, the actual vibration noise and the vibration noise threshold, generate a comprehensive adjustment ratio to adjust the ratio of oriented silicon steel and non-oriented silicon steel in the core, so that the real-time magnetic flux density is within the range of the maximum magnetic flux density and the minimum magnetic flux density, and the real-time core loss and the real-time vibration noise are reduced below the threshold.

[0022] In this embodiment, the principle for generating a comprehensive adjustment ratio to adjust the ratio of oriented silicon steel to non-oriented silicon steel in the core is: The adjustment ratio is adjusted based on the total amount of oriented silicon steel and non-oriented silicon steel, which is different from the stacking ratio in step 1.

[0023] From the perspective of magnetic flux density, oriented silicon steel has a higher magnetic permeability. Increasing the proportion of oriented silicon steel can increase the local magnetic permeability, thereby increasing the magnetic flux density. Non-oriented silicon steel has a lower magnetic permeability. Increasing the proportion of non-oriented silicon steel can reduce the local magnetic permeability, thereby reducing the magnetic flux density. If the real-time magnetic flux density exceeds the maximum magnetic flux density, the magnetic flux density needs to be reduced, which can be achieved by increasing the proportion of non-oriented silicon steel. If the real-time magnetic flux density is lower than the minimum magnetic flux density, the magnetic flux density needs to be increased, which can be achieved by increasing the proportion of oriented silicon steel. The formula for calculating the adjustment ratio of oriented silicon steel is: ; in, Indicates the adjustment ratio of oriented silicon steel under the influence of magnetic flux density, Indicates the magnetic flux density of oriented silicon steel, Represents the magnetic flux density of non-oriented silicon steel, Represents the maximum magnetic flux density, Indicates the minimum magnetic flux density; when When , it means that the proportion of oriented silicon steel is reduced, and the greater the magnetic flux density, the greater the reduction ratio of oriented silicon steel, so as to reduce the magnetic flux density; when When , it means that the proportion of oriented silicon steel is increased, and the smaller the magnetic flux density is, the greater the increase proportion of oriented silicon steel is, so as to increase the magnetic flux density; when When the ratio of oriented silicon steel is 100%, no adjustment is needed to maintain the current ratio of oriented silicon steel; Indicates the magnetic flux density of oriented silicon steel, that is, the proportion of oriented silicon steel is 100%, and the highest magnetic flux density in the actual process , It represents the magnetic flux density of non-oriented silicon steel, that is, the proportion of non-oriented silicon steel is 100%, and the proportion of oriented silicon steel is 0. ; calculated The absolute value is between 0 and 1, and When it is positive, it means increasing the proportion of oriented silicon steel. When it is negative, it means that the proportion of oriented silicon steel is reduced.

[0024] Maximum magnetic flux density Indicates the saturation magnetic flux density of the core material, usually 90% of the material saturation value. The minimum magnetic flux density indicates the lower limit of the core material utilization rate, usually 70% of the material saturation value. The material saturation value indicates the magnetic flux density corresponding to all oriented silicon steel or all non-oriented silicon steel. The actual magnetic flux density is controlled within and To avoid magnetic saturation and insufficient material utilization; when When the magnetic flux density is too high, it may lead to magnetic saturation of the core material, causing a sharp increase in core loss and excessive temperature rise. The magnetic permeability of non-oriented silicon steel is low, which can reduce the local magnetic flux density. Therefore, the proportion of non-oriented silicon steel needs to be increased at this time; when When the magnetic flux density is too low, it may lead to insufficient utilization of the core material. The magnetic permeability of oriented silicon steel is higher, which can increase the local magnetic flux density. Therefore, it is necessary to increase the proportion of oriented silicon steel at this time. When the magnetic flux density is within the safe range, the material ratio does not need to be adjusted; The goal of calculating the adjustment ratio formula is to adjust the ratio of oriented silicon steel to non-oriented silicon steel so that the real-time magnetic flux density reaches the target range. Reflects the difference between the real-time magnetic flux density and the target magnetic flux density. It reflects the difference in magnetic flux density between oriented silicon steel and non-oriented silicon steel under the same working conditions. The larger the value, the higher the magnetic permeability of the oriented silicon steel, and the smaller the adjustment required to reduce the magnetic flux density. The adjustment ratio is inversely proportional to the difference in magnetic flux density between oriented silicon steel and non-oriented silicon steel, and is inversely proportional to the difference between the real-time magnetic flux density and the target magnetic flux density. is inversely proportional to the difference.

[0025] From the perspective of core loss, oriented silicon steel has higher hysteresis loss but excellent magnetic permeability, while non-oriented silicon steel has lower hysteresis loss and eddy current loss but lower magnetic permeability. Increasing the proportion of oriented silicon steel will increase magnetic permeability and core loss; increasing the proportion of non-oriented silicon steel will reduce magnetic permeability and core loss. The formula for calculating the adjustment ratio of oriented silicon steel is: ; in, Indicates the adjustment ratio of oriented silicon steel under the influence of core loss, Indicates the core loss of oriented silicon steel. Indicates the core loss of non-oriented silicon steel, Indicates the core loss threshold; when When the core loss is reduced, the proportion of oriented silicon steel needs to be reduced. The higher the core loss, the greater the reduction proportion of oriented silicon steel. The hysteresis loss of oriented silicon steel is relatively high at high frequency and high magnetic flux density, while non-oriented silicon steel has relatively uniform magnetism in all directions and its hysteresis loss is relatively low. Indicates the adjustment required to adjust the real-time core loss to the core loss threshold. When , it means that the real-time core loss exceeds the threshold, and it is necessary to increase non-oriented silicon steel to reduce the core loss; when When the core loss does not reach the threshold, the proportion of oriented silicon steel can be appropriately increased to improve the performance of the reactor. Each time the oriented silicon steel is increased, the real-time core loss and the core loss threshold are calculated. If it is still within the core loss threshold, the proportion of oriented silicon steel can continue to be increased.

[0026] From the perspective of vibration and noise, oriented silicon steel has a high magnetostriction coefficient and is prone to produce large vibration noise. Non-oriented silicon steel has a low magnetostriction coefficient and produces small vibration noise. Increasing the proportion of oriented silicon steel will lead to increased vibration noise, while increasing the proportion of non-oriented silicon steel will lead to reduced vibration noise. The formula for calculating the adjustment ratio of oriented silicon steel is: ; in, Indicates the adjustment ratio of oriented silicon steel under the influence of vibration and noise, Indicates the vibration noise of oriented silicon steel. Indicates the noise and vibration of non-oriented silicon steel. Indicates the noise vibration threshold; when When the vibration noise is reduced, the proportion of oriented silicon steel needs to be reduced, and the greater the vibration noise, the greater the reduction proportion of oriented silicon steel; The main source of vibration noise is the magnetostrictive effect. Indicates the adjustment amount required to adjust the real-time vibration noise to the vibration noise threshold. When , it means that the real-time vibration noise exceeds the threshold, and it is necessary to increase the proportion of non-oriented silicon steel to reduce the vibration noise; when It means that the vibration noise has not reached the threshold. The proportion of oriented silicon steel can be appropriately increased to improve the performance of the reactor. Each time the oriented silicon steel is increased, the real-time vibration noise and the vibration noise threshold are calculated. If it is still within the vibration noise threshold, the proportion of oriented silicon steel can continue to be increased.

[0027] Combining magnetic flux density, core loss and vibration noise, the formula for generating a comprehensive adjustment ratio is: ; in, represents the comprehensive adjustment ratio, They represent the weight coefficients of the adjustment ratios of the magnetic flux density, core loss, and vibration noise, respectively. ,and .

[0028] Magnetic flux density is the core parameter of reactor performance, which directly affects magnetic field strength and equipment efficiency. Magnetic flux density also affects core loss and vibration noise. Therefore, the control of magnetic flux density is the primary task and has the highest weight. Core loss directly affects the operating efficiency and temperature rise of the equipment, and vibration noise affects the operating environment and user experience of the equipment. The two are equally important and are given the same weight. ; Magnetic flux density, core loss and vibration noise all have an impact on the ratio of oriented silicon steel and non-oriented silicon steel. A comprehensive adjustment ratio is generated by combining the influence of magnetic flux density, core loss and vibration noise, which reflects the comprehensive impact on the adjustment ratio of oriented silicon steel.

[0029] The proportion of oriented silicon steel after comprehensive adjustment is: ,in, Indicates the proportion of oriented silicon steel after adjustment, Indicates the proportion of oriented silicon steel before adjustment.

[0030] The present invention also provides a magnetostrictive self-eliminating ultra-high voltage shunt reactor, wherein the reactor has a stacked structure of multiple layers of iron core cakes, part of the iron core cakes are made of oriented silicon steel sheets, and the other part of the iron core cakes are made of non-oriented silicon steel sheets, and the ratio of the iron core cakes is controlled by the above-mentioned magnetostrictive self-eliminating ultra-high voltage shunt reactor control method.

[0031] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0032] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented by software, the above embodiments may be implemented in whole or in part in the form of a computer program product. Those skilled in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software methods depends on the specific application and design constraints of the technical solution.

[0033] 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, and 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.

[0034] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A method for controlling a magnetostrictive self-eliminating ultra-high voltage shunt reactor, characterized in that: The specific steps include: Step 1: stacking multiple layers of iron cores inside the magnetostriction elimination type UHV shunt reactor to form an iron core layer, wherein the material of the iron core includes oriented silicon steel and non-oriented silicon steel; Step 2: Generate real-time magnetic flux density based on the number of turns, cross-sectional area, voltage and power frequency of the iron core, generate real-time core loss based on the real-time magnetic flux density, real-time power frequency and iron core characteristics, and generate real-time vibration noise based on the real-time magnetic flux density and magnetostriction coefficient of the iron core, wherein the iron core characteristics include hysteresis loss coefficient, magnetostriction loss index and eddy current loss coefficient of the iron core; Step 3: Based on the real-time magnetic flux density and the maximum magnetic flux density and the minimum magnetic flux density, the actual core loss and the core loss threshold, the actual vibration noise and the vibration noise threshold, generate a comprehensive adjustment ratio to adjust the ratio of oriented silicon steel and non-oriented silicon steel in the core, so that the real-time magnetic flux density is within the range of the maximum magnetic flux density and the minimum magnetic flux density, and the real-time core loss and the real-time vibration noise are reduced below the threshold.

2. The method for controlling a magnetostrictive self-eliminating UHV shunt reactor according to claim 1, characterized in that: The iron core layer is composed of multiple iron cores, some of which are made of oriented silicon steel materials, and the other part of the iron cores are made of non-oriented silicon steel materials, and the stacking method is alternating stacking.

3. The method for controlling a magnetostrictive self-eliminating UHV shunt reactor according to claim 1, characterized in that: The formula for generating the magnetic flux density in step 2 is: ； in, Indicates the real-time magnetic flux density, Indicates the rated working voltage of the reactor. Indicates the real-time power frequency, Indicates the number of turns of the core coil, Indicates the cross-sectional area of ​​the core; The formula for generating core losses is: ； in, Indicates the real-time core loss, represents the hysteresis loss coefficient, represents the hysteresis loss index, represents the eddy current loss coefficient; The formula for generating vibration noise is: ； in, Represents real-time vibration noise, represents the magnetostriction coefficient, represents the reference magnetic flux density, and .

4. A method for controlling a magnetostrictive self-eliminating UHV shunt reactor according to claim 3, characterized in that: The standard for generating a comprehensive adjustment ratio to adjust the ratio of oriented silicon steel and non-oriented silicon steel in the core is: The formula for calculating the adjustment ratio of oriented silicon steel based on magnetic flux density is: ； in, Indicates the adjustment ratio of oriented silicon steel under the influence of magnetic flux density, Indicates the magnetic flux density of oriented silicon steel, Represents the magnetic flux density of non-oriented silicon steel, Represents the maximum magnetic flux density, Indicates the minimum magnetic flux density; The formula for calculating the adjustment ratio of oriented silicon steel based on core loss is: ； in, Indicates the adjustment ratio of oriented silicon steel under the influence of core loss, Indicates the core loss of oriented silicon steel. Indicates the core loss of non-oriented silicon steel, Indicates the core loss threshold; The formula for calculating the adjustment ratio of oriented silicon steel based on vibration noise is: ； in, Indicates the adjustment ratio of oriented silicon steel under the influence of vibration and noise, Indicates the vibration noise of oriented silicon steel. Indicates the noise and vibration of non-oriented silicon steel. Indicates the noise vibration threshold; Combining magnetic flux density, core loss and vibration noise, the formula for generating a comprehensive adjustment ratio is: ； in, represents the comprehensive adjustment ratio, They represent the weight coefficients of the adjustment ratios of the magnetic flux density, core loss, and vibration noise, respectively. ,and ; The proportion of oriented silicon steel after comprehensive adjustment is: ； in, Indicates the proportion of oriented silicon steel after adjustment, Indicates the proportion of oriented silicon steel before adjustment.

5. A magnetostrictive self-eliminating UHV shunt reactor, characterized in that: The reactor has a stacked structure of multiple layers of core cakes, some of which are made of oriented silicon steel sheets, and the other parts are made of non-oriented silicon steel sheets. The ratio of the core cakes is controlled by the magnetostrictive self-eliminating UHV shunt reactor control method described in any one of claims 1 to 4.

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