Intelligent power-saving protection method for amorphous alloy three-dimensional roll iron core

Abstract

The invention belongs to the technical field of amorphous alloy three-dimensional roll iron core power saving, and discloses an intelligent power-saving protection method for an amorphous alloy three-dimensional roll iron core. According to the method, the current harmonic distortion rate, the magnetic field non-uniform coefficient and the temperature gradient of the amorphous alloy three-dimensional roll iron core are collected, then the relevance model of the operation state parameters and the electric energy loss indexes is constructed, the equipment operation state can be comprehensively reflected, the relation between the parameters and the loss can be accurately revealed, loss prediction and energy-saving optimization are achieved, and the method is suitable for popularization and application. And equipment maintenance and performance improvement can be assisted. According to the invention, power-saving demand analysis is carried out in different regions, the power-saving potential regions are identified, dynamic regulation and control are carried out in a targeted manner, power utilization characteristics of different regions can be accurately positioned, blindness of a uniform energy-saving strategy is avoided, accurate resource putting is realized, and the effectiveness of energy-saving measures is improved; the strategy can be adjusted in real time according to the power utilization change of each region, the energy utilization efficiency is improved, and the overall energy consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of power saving of amorphous alloy three-dimensional wound cores, and relates to an intelligent power saving protection method for amorphous alloy three-dimensional wound cores. Background Art

[0002] The amorphous alloy three-dimensional wound core is a transformer core made of amorphous alloy material and having a three-dimensional winding structure. Conducting power saving analysis on the amorphous alloy three-dimensional wound core, the amorphous alloy material itself has the characteristics of low magnetic permeability and low loss. However, in its actual operation, due to factors such as current harmonics, uneven magnetic field distribution, and temperature field changes, the local loss may increase abnormally. Through power saving analysis, the potential of the material can be fully exploited to further reduce the no-load loss and load loss of the core. Therefore, the research on intelligent power saving protection based on amorphous alloy three-dimensional wound cores is of great significance.

[0003] There are also technical solutions regarding core power saving technology in the prior art. For example, a Chinese patent application for an invention of a high-voltage power saving system with seamless connection function, with the publication number CN105429142A, in which a star-connected three-dimensional wound core autotransformer is connected in series at the high-voltage input end, and its output end is an excitation winding of a multi-tap voltage regulator. Each gear output is connected to the corresponding gear of the tap changer, and the number of tap changer gears is the same as the number of transformer taps. The tap changer switches gears under the command of the tap changer controller, and the command comes from the central controller unit. The central controller unit drives the tap changer controller to switch gears according to the electrical parameter acquisition module and internal instruction settings, so that the electrical appliance operates at the minimum appropriate voltage to save energy. In addition, the series-connected three-dimensional wound core autotransformer can improve the system stability, filter and improve the system power factor.

[0004] Another Chinese patent application for an invention of a power saving device with the publication number CN116964699A can keep the output voltage stable and reduce power consumption when the input voltage changes. It uses the mutual inductance of the toroidal core to adjust the supply voltage to a stable value for the load side, which can improve the load performance and life, and thus save electricity. In particular, the toroidal core wound with primary and secondary coils is firmly fixed in the device by a core fixing member, and the heat generated by the toroidal core can be easily discharged to prevent the device temperature from rising.

[0005] Although the above two solutions propose some solutions for the core power saving technology, there are still certain limitations. For example, on the one hand, the prior art solutions do not establish a correlation model between the operating state parameters and the power loss index, cannot clearly understand the influence mechanism of the changes in each operating state parameter on the power loss, cannot accurately predict the power loss under different working conditions, and cannot formulate scientific and effective energy-saving optimization strategies based on the relationship between the two.

[0006] On the other hand, the existing technical solutions do not conduct power-saving demand analysis by region to further identify power-saving potential areas. This analysis method is difficult to accurately locate high-energy-consuming areas and cannot formulate power-saving strategies according to local conditions. As a result, the resource allocation is unreasonable, resources may be wasted in areas where key investment is not required, while the areas with real power-saving potential cannot be effectively explored, making it difficult to maximize energy-saving benefits and restricting the achievement of the overall energy-saving goal. Summary of the Invention

[0007] In view of this, to solve the problems raised in the above background technology, a smart power-saving protection method for amorphous alloy three-dimensional wound cores is proposed.

[0008] The object of the present invention can be achieved through the following technical solutions: A smart power-saving protection method for amorphous alloy three-dimensional wound cores, comprising the following steps: collecting the operation data of the amorphous alloy three-dimensional wound core, where the operation data includes current harmonic distortion rate, magnetic field non-uniformity coefficient, and temperature gradient.

[0009] Based on the operation data, a correlation model between the operation state parameters and the power loss index of the amorphous alloy three-dimensional wound core is established by using a multi-physics field coupling simulation algorithm.

[0010] According to the correlation model, the power-saving potential areas of the amorphous alloy three-dimensional wound core are identified, and dynamic regulation instructions are generated by combining the operation data of the corresponding power-saving potential areas.

[0011] Execute the dynamic regulation instructions, synchronously collect the power loss change data of the amorphous alloy three-dimensional wound core, and generate a power-saving effect analysis report by using the time-domain comparison analysis method.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: (1) By collecting the current harmonic distortion rate, magnetic field non-uniformity coefficient, and temperature gradient of the amorphous alloy three-dimensional wound core, and then constructing a correlation model between the operation state parameters and the power loss index, the present invention can comprehensively reflect the operation state of the equipment, accurately reveal the relationship between parameters and losses, realize loss prediction and energy-saving optimization, and can also assist in equipment maintenance and performance improvement.

[0013] (2) By conducting power-saving demand analysis by region, then identifying power-saving potential areas and performing targeted dynamic regulation, the present invention can accurately locate the electricity consumption characteristics of different regions, avoid the blindness of unified energy-saving strategies, achieve precise resource allocation, improve the effectiveness of energy-saving measures; it can also adjust the strategy in real time according to the electricity consumption changes in each region, improve energy utilization efficiency, reduce overall energy consumption, and at the same time provide a scientific basis for regional energy planning and management. Description of the Drawings

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the implementation steps of the method of the present invention.

[0016] Figure 2 It is a schematic diagram of the positioning of the corresponding monitoring points of the amorphous alloy three-dimensional wound core provided by the present invention.

[0017] Figure 3 A schematic diagram of the process for judging the regulation result corresponding to an embodiment is provided.

[0018] Reference numerals: 1 - sub-region, 2 - monitoring point. Detailed implementation manners

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to Figure 1 As shown, the present invention provides an intelligent power-saving protection method for an amorphous alloy three-dimensional wound core, including the following steps: collecting the operation data of the amorphous alloy three-dimensional wound core, where the operation data includes the current harmonic distortion rate, the magnetic field non-uniformity coefficient, and the temperature gradient.

[0021] It should be noted that the current harmonic distortion rate, magnetic field non-uniformity coefficient, and temperature gradient are important parameters for evaluating the operating state and power loss of amorphous alloy three-dimensional wound cores, as follows: 1. The current harmonic distortion rate can reflect the degree to which the current waveform deviates from a sine wave. The higher the current harmonic distortion rate, the greater the harmonic content in the current, which will increase the eddy current loss and hysteresis loss of the core, resulting in increased core heating and power loss, and affecting the normal operation of the amorphous alloy three-dimensional wound core and the power utilization efficiency. 2. The magnetic field non-uniformity coefficient is used to characterize the uniformity of the magnetic field distribution on the surface of the amorphous alloy three-dimensional wound core. The larger the magnetic field non-uniformity coefficient, the more uneven the magnetic field distribution, which may cause local magnetic saturation in the core, increase the hysteresis loss and eddy current loss, and reduce the performance of the core and the power conversion efficiency. 3. The temperature gradient reflects the temperature difference between different parts of the core. A large temperature gradient may lead to uneven distribution of thermal stress in the core, accelerate the aging of the core, affect its performance, and at the same time, the interaction between heat and magnetism will further increase the power loss.

[0022] In a preferred embodiment of the present invention, the specific method for obtaining the current harmonic distortion rate is as follows: Please refer to Figure 2 As shown, a three-dimensional scanning device is used to obtain the three-dimensional distribution contour data of the amorphous alloy three-dimensional wound core, a surface contour model is constructed, the surface contour of the amorphous alloy three-dimensional wound core is meshed based on the spatial grid division technology, the surface of the amorphous alloy three-dimensional wound core is divided into multiple sub-regions, the center points of each sub-region are used as monitoring points, and the area size of the sub-region is preset.

[0023] It should be noted that the reasons for meshing the surface contour of the amorphous alloy three-dimensional wound core based on the spatial grid division technology are as follows: 1. Improve the accuracy of data collection. After the complex core surface is divided, using the center point of the sub-region as the monitoring point can accurately measure parameters such as the current harmonic distortion rate, avoid the error of overall measurement, and truly reflect the local characteristics. 2. Facilitate in-depth analysis of the physical field. By calculating the magnetic field non-uniformity coefficient, temperature gradient, etc. in the sub-region, the change law of physical quantities can be clearly grasped, providing a basis for optimizing the core. 3. Simplify the model calculation. Convert the complex surface into regular sub-regions, reduce the calculation difficulty, and improve the modeling and calculation efficiency. 4. Help to achieve precise control. Develop personalized strategies for the operating conditions of different sub-regions, separately control the power-saving potential areas, improve the overall power-saving protection effect, and at the same time avoid affecting other normal areas.

[0024] It should be explained that the reasons for taking the center points of each sub-region as monitoring points are as follows: 1. Improve measurement accuracy. The surface of the amorphous alloy three-dimensional wound core is complex. The center point can represent the overall characteristics of the sub-region, reduce the interference of other points within the region, and collect data such as the current harmonic distortion rate more accurately to reflect local characteristics. 2. Facilitate calculation and analysis. Based on the data of the center point, calculations such as the magnetic field non-uniformity coefficient and temperature gradient can be carried out, which can simplify the calculation model, reduce the calculation complexity, and improve the calculation efficiency. 3. Contribute to achieving precise regulation. According to the data of the center point, regions with high losses and other regions can be accurately located, and special regulation strategies can be formulated for these regions, such as injecting reverse harmonic current, to improve the overall power-saving protection effect.

[0025] It should be noted that the basis for presetting the area size of the sub-region: The area size of the sub-region is preset according to the actual situation of the iron core and research requirements. On the one hand, the size and physical properties of the iron core itself affect the setting. For a large-sized iron core, the area of the sub-region can be appropriately increased, and vice versa for a small-sized one; those with complex physical properties require small-area sub-regions to capture changes. On the other hand, research accuracy and data processing volume are important considerations. For high-precision research, the area of the sub-region should be small, but it will increase the data processing volume; if you want to control the data volume, the area can be appropriately increased, and a balance needs to be struck between the two to determine the appropriate size.

[0026] Current acquisition sensors are set at each monitoring point, and the current acquisition sensors are used to collect the current signals of each monitoring point based on equal-interval cycle durations, and then input into a harmonic analyzer to calculate the effective value of the fundamental wave and the effective values of each harmonic component through Fourier transform. The ratio of the square root of the sum of the squares of the effective values of each harmonic component to the effective value of the fundamental wave is used as the current harmonic distortion rate of each monitoring point.

[0027] It should be noted that the equal-interval cycle duration refers to a fixed duration in which the time interval for each data acquisition remains equal during the data acquisition process. In the method of the present invention, the equal-interval cycle duration is adopted when collecting current signals, magnetic flux density components, and temperature data. From the perspective of data accuracy, equal-interval acquisition can ensure the uniformity of the time series of data, which is convenient for subsequent analysis. If the acquisition interval duration is not fixed, it is difficult to analyze the data fluctuation law. When analyzing the current harmonic distortion rate, for example, equal-interval acquisition can ensure the accuracy of Fourier transform calculation. From the perspective of model establishment and regulation, equal-interval data can provide a stable data basis for establishing a correlation model, and can also make dynamic regulation instructions more accurate. Based on the stably collected data, the operating state of the iron core is judged, and the operating parameters are adjusted in a timely manner.

[0028] A preferred embodiment, the analysis formula of the current harmonic distortion rate: , where represents the th harmonic component effective value, represents the fundamental wave effective value, Indicates the number of harmonic components, , indicates the number of harmonic components.

[0029] In a preferred embodiment of the present invention, the specific analysis method of the magnetic field non-uniformity coefficient is as follows: Multiaxial Hall sensors are embedded at each monitoring point on the surface of the amorphous alloy three-dimensional wound core to form a multiaxial Hall sensor array. The multiaxial Hall sensor array is used to collect the magnetic flux density components in each direction at each monitoring point based on an equally spaced periodic time duration, and the effective value of the three-dimensional magnetic induction intensity vector is calculated by synthesizing the magnetic flux density components in each direction to obtain the effective value of the magnetic induction intensity at each monitoring point.

[0030] In a preferred embodiment, the formula for calculating the effective value of the synthesized three-dimensional magnetic induction intensity vector: , where respectively represent the magnetic flux density components in three mutually perpendicular directions. Specifically, represents the magnetic flux density component in the direction, represents the magnetic flux density component in the direction, represents the magnetic flux density component in the direction.

[0031] The effective values of the magnetic induction intensity at each monitoring point are respectively subjected to mean value calculation and standard deviation calculation to obtain the corresponding average magnetic density and magnetic field standard deviation, and then the ratio of the magnetic field standard deviation to the average magnetic density is calculated to obtain the magnetic field non-uniformity coefficient at each monitoring point.

[0032] In a preferred embodiment of the present invention, the specific analysis method of the temperature gradient is as follows: Fiber Bragg grating temperature sensors are embedded at each monitoring point on the surface of the amorphous alloy three-dimensional wound core to form a fiber Bragg grating temperature sensor array. The fiber Bragg grating temperature sensor array is used to collect the temperature at each monitoring point based on an equally spaced periodic time duration, and at the same time, the temperatures of the corresponding adjacent monitoring points are obtained.

[0033] A three-dimensional scanning device is used to obtain the temperature influence distance between each adjacent monitoring point. The temperature difference is calculated by subtracting the temperature values of each monitoring point from those of the corresponding adjacent monitoring points, and then the ratio of the temperature difference to the corresponding temperature influence distance is calculated to obtain the temperature change rate.

[0034] The average value of the temperature change rates of each monitoring point with respect to the corresponding adjacent monitoring points is calculated to obtain the temperature gradient at each monitoring point.

[0035] It should be noted that the greater the temperature change rate, the more drastic the temperature change in the local area, and there may be greater thermal stress, which will affect the performance and life of the core, and may also lead to increased thermal magnetic coupling loss. By calculating the average of the temperature change rate of each monitoring point and the corresponding adjacent monitoring points, the temperature gradient of each monitoring point can be obtained, which further reflects the change of the core surface temperature as a whole, providing an important basis for judging the core operation status and formulating power saving protection strategies.

[0036] Based on the operating data, a multi-physical field coupling simulation algorithm is used to establish a correlation model between the operating state parameters of the amorphous alloy three-dimensional wound core and the power loss index.

[0037] In a preferred embodiment of the present invention, the specific method of establishing a correlation model between the operating status parameters of the amorphous alloy three-dimensional wound core and the power loss index is as follows: extract the current harmonic distortion rate, magnetic field non-uniformity coefficient and temperature gradient of each monitoring point corresponding to each sub-region, normalize them with the preset extreme operating condition reference values respectively, and then generate the power loss index evaluation index of each sub-region through multi-physical field data fusion analysis.

[0038] In a preferred embodiment, the calculation formula of the power loss index evaluation index is: ,in , , They represent the surface of the amorphous alloy three-dimensional coil core. The current harmonic distortion rate, magnetic field inhomogeneity coefficient and temperature gradient of each sub-region, Indicates the sub-area number, , represents the number of sub-areas, , , They represent the current harmonic distortion rate, magnetic field non-uniformity coefficient and temperature gradient under the preset extreme working condition reference values. They respectively represent the weights corresponding to the current harmonic distortion rate, magnetic field non-uniformity coefficient and temperature gradient. In practical applications, they need to be determined based on a large amount of experimental data, theoretical analysis or machine learning algorithms to accurately reflect the influence of each parameter on power loss.

[0039] It should be noted that establishing a correlation model between the operating state parameters of the amorphous alloy three-dimensional wound core and the power loss index is of great significance. It integrates multiple parameters to accurately evaluate the loss, avoids the limitations of single-parameter analysis, and enables the operation and maintenance personnel to accurately grasp the energy consumption status. With the evaluation index generated by the model, the power-saving potential areas can be accurately located, providing a direction for the power-saving strategy. Moreover, the model provides a basis for generating dynamic regulation instructions, optimizes the operation of the core in real time, and improves the energy utilization efficiency. In addition, by monitoring the model parameters, the fault risk can be warned, the probability of equipment damage can be reduced, the service life of the core can be extended, and the stable operation of the power system can be guaranteed.

[0040] It should be noted that the present invention collects the current harmonic distortion rate, magnetic field non-uniformity coefficient, and temperature gradient of the amorphous alloy three-dimensional wound core, and then constructs a correlation model between the operating state parameters and the power loss index, which can comprehensively reflect the operating state of the equipment, accurately reveal the relationship between the parameters and the loss, realize loss prediction and energy-saving optimization, and can also assist in equipment maintenance and performance improvement.

[0041] Identify the power-saving potential areas of the amorphous alloy three-dimensional wound core according to the correlation model, and generate dynamic regulation instructions by combining the operation data of the corresponding power-saving potential areas.

[0042] In a preferred embodiment of the present invention, the specific analysis method of the power-saving potential area is as follows: extract the magnetic field non-uniformity coefficient and temperature gradient of each sub-area, and then perform a correlation analysis to obtain the thermomagnetic coupling coefficient of each sub-area. Compare the thermomagnetic coupling coefficient with the pre-set thermomagnetic coupling coefficient threshold respectively. If the thermomagnetic coupling coefficient of a certain sub-area is greater than or equal to the thermomagnetic coupling coefficient threshold, identify this sub-area as a thermomagnetic coupling loss hot spot area.

[0043] A preferred embodiment, the calculation formula of the thermomagnetic coupling coefficient: , where the thermomagnetic coupling coefficient is obtained by taking the numerical part of the calculation result of this formula, and the thermomagnetic coupling coefficient indicates the correlation between the temperature gradient and the magnetic field gradient.

[0044] It should be explained that the thermomagnetic coupling coefficient threshold is a standard value comprehensively determined according to the design parameters, operation requirements of the amorphous alloy three-dimensional wound core, and long-term experimental and practical experience, etc.

[0045] Extract the current harmonic distortion rate and magnetic field non-uniformity coefficient of each sub-area, and compare them with the pre-set current harmonic distortion rate threshold and magnetic field non-uniformity coefficient threshold respectively. If the current harmonic distortion rate of a certain sub-area is greater than the current harmonic distortion rate threshold or the magnetic field non-uniformity coefficient is greater than the magnetic field non-uniformity coefficient threshold, identify this area as a high-loss potential area.

[0046] It should be noted that an excessively high current harmonic distortion rate will increase the eddy current loss in the iron core because harmonic currents will generate additional eddy currents in the iron core, causing the iron core to heat up and thus increasing the energy loss. The larger the magnetic field non-uniformity coefficient, the more obvious the non-uniformity of the magnetic field distribution, which will cause the magnetic flux density in local areas of the iron core to be too high or too low. When the local magnetic flux density is too high, the iron core material is more likely to reach the magnetic saturation state, resulting in an increase in the area of the hysteresis loop and an increase in the hysteresis loss. Therefore, when the current harmonic distortion rate of a certain sub-region is greater than the current harmonic distortion rate threshold or the magnetic field non-uniformity coefficient is greater than the magnetic field non-uniformity coefficient threshold, this region can be identified as a high-loss potential region.

[0047] Compare the evaluation index of the power loss index of each sub-region with the pre-set evaluation index threshold of the power loss index. If the evaluation index of the power loss index of a certain sub-region is greater than the evaluation index threshold of the power loss index, identify this sub-region as a power loss abnormal region.

[0048] If a certain sub-region is one or more of the thermomagnetic coupling loss hot spot regions, high-loss potential regions, and power loss abnormal regions, then identify this sub-region as a power saving potential region.

[0049] It should be noted that when a sub-region meets any one of the thermomagnetic coupling loss hot spot regions, high-loss potential regions, and power loss abnormal regions, or meets multiple situations at the same time, this region is identified as a power saving potential region. This is because the loss conditions in these regions are relatively high. By taking some targeted power saving measures, such as optimizing the magnetic field distribution, controlling current harmonics, and improving the heat dissipation conditions, it is very likely to reduce the power loss in this region, thereby achieving the overall power saving effect. That is to say, there is a large energy saving space in these regions, so they are called power saving potential regions.

[0050] In a preferred embodiment of the present invention, the specific method for generating the dynamic regulation instruction is as follows: Compare the temperature of each sub-region with the pre-set reference temperature threshold. Mark the regions where the temperature is greater than the reference temperature threshold as temperature exceeding regions. Count the number of temperature exceeding regions, and then calculate the ratio of the number of temperature exceeding regions to the total number of sub-regions to obtain the ratio of the number of temperature exceeding regions. If the ratio of the number of temperature exceeding regions is greater than the pre-set ratio threshold of the number of temperature exceeding regions, start the cooling fan to cool the temperature exceeding regions.

[0051] It should be noted that starting the cooling fan to cool the temperature exceeding regions when the ratio is greater than the threshold is an automatic and effective response mechanism. The cooling fan can increase the air flow, take away the heat, reduce the temperature of the temperature exceeding regions, prevent the equipment from being damaged due to overheating for a long time, thereby ensuring the stable operation of the equipment and extending the service life of the equipment.

[0052] If there is a hot spot area of thermomagnetic coupling loss, adjust the phase angle of the input voltage.

[0053] It should be noted that during the operation of the amorphous alloy three-dimensional wound core, the appearance of a hot spot area of thermomagnetic coupling loss means that due to the interaction of magnetic field non-uniformity and temperature gradient in this area, additional energy loss and local overheating occur. Adjusting the phase angle of the input voltage is a possible solution, and the reasons are as follows: 1. Changing the magnetic field distribution: The phase angle of the input voltage determines the establishment process and distribution of the magnetic field in the core. By adjusting the phase angle, the distribution law of the magnetic field in the core can be changed, so that the originally non-uniform magnetic field distribution can be adjusted, which may reduce the magnetic field strength in the hot spot area and reduce the loss caused by magnetic field concentration.

[0054] 2. Reducing the thermomagnetic coupling effect: Due to the change in the magnetic field distribution, the magnetic field non-uniformity coefficient in the hot spot area will change, which in turn affects the thermomagnetic coupling coefficient. Since the thermomagnetic coupling loss is closely related to the magnetic field non-uniformity coefficient, adjusting the magnetic field distribution can reduce the thermomagnetic coupling effect and reduce the additional loss and heating in the hot spot area.

[0055] 3. Optimizing the operating state of the core: Appropriately adjusting the phase angle of the input voltage can make the magnetic flux distribution in the core more uniform as a whole, and the hysteresis loss and eddy current loss of each part will also be more balanced, avoiding excessive loss and temperature rise in local areas, thereby optimizing the operating state of the core and improving the efficiency and reliability of the equipment.

[0056] If there is no hot spot area of thermomagnetic coupling loss and there is a high-loss potential area, enable the active filter to inject reverse harmonic current.

[0057] It should be noted that the reasons for enabling the active filter to inject reverse harmonic current are as follows: 1. For the cause of high-loss potential: The formation of a high-loss potential area may be due to an excessive current harmonic distortion rate. When there are harmonics in the current, it will increase the eddy current loss in the core, cause the core to heat up, and increase the energy loss. The active filter can detect the harmonic current in the line and then inject a harmonic current with the same magnitude and opposite direction to cancel out the original harmonic current, thereby reducing the current harmonic distortion rate.

[0058] 2. Reducing the loss risk: By injecting reverse harmonic current through the active filter, the harmonic components in the current can be effectively reduced, thereby reducing the additional loss caused by harmonics, avoiding the high-loss potential area from further developing into an actual high-loss area or even a fault area, and ensuring the normal operation of the equipment and the efficient utilization of electric energy.

[0059] 3. Protection of Equipment and Optimization of Operation: If high-loss potential areas are not dealt with in a timely manner, they may cause long-term damage to the equipment, affecting its service life and performance. Enabling active filters can improve the current quality, reduce the burden on the equipment, optimize the operating conditions of the equipment, and enhance the stability and reliability of the entire system.

[0060] Execute dynamic regulation instructions, synchronously collect the power loss change data of amorphous alloy three-dimensional wound cores, and generate an energy-saving effect analysis report using time-domain comparative analysis method.

[0061] In a preferred embodiment of the present invention, the power loss change data includes a loss reduction rate and an energy efficiency improvement index.

[0062] It should be noted that the loss reduction rate refers to the proportion of the energy loss of the equipment or system reduced relative to that before improvement after taking certain energy-saving measures or technological improvements. It reflects the effect of energy-saving measures on reducing energy loss. The higher the loss reduction rate, the more effective the energy-saving measures are, which can help enterprises or users reduce energy costs, reduce energy waste, and at the same time contribute to improving energy utilization efficiency and reducing environmental impact.

[0063] It should be noted that the energy efficiency improvement index is a comprehensive index used to measure the improvement degree of the energy utilization efficiency of equipment, systems or the entire production process. It takes into account multiple factors such as energy consumption, production output, product quality, etc. to comprehensively evaluate the change of energy utilization efficiency. The energy efficiency improvement index can more comprehensively reflect the improvement of energy utilization efficiency, not only focusing on the reduction of energy consumption, but also considering other factors in the production process. It can help evaluate the effect of energy management measures, formulate more scientific and reasonable energy policies and development plans, and promote energy conservation and sustainable development of the whole society.

[0064] In a preferred embodiment of the present invention, the specific analysis method of the power loss change data is as follows: Obtain the average power data before regulation and the average power data under the same load condition after regulation, and then perform difference calculation and normalization processing to obtain the loss reduction rate.

[0065] Obtain the output power and input power under the same load condition before and after regulation, calculate the ratio of the output power and the input power to obtain the total system efficiency before and after regulation, and perform difference calculation and normalization processing on the total system efficiency after regulation and the total system efficiency before regulation to obtain the energy efficiency improvement index.

[0066] In a preferred embodiment of the present invention, the specific analysis of the energy-saving effect analysis report further includes: Please refer to Figure 3As shown, the loss reduction rate and the energy efficiency improvement index are compared with the preset expected loss reduction rate and the expected energy efficiency improvement index. If the loss reduction rate is greater than the loss reduction rate threshold and the energy efficiency improvement index is greater than the energy efficiency improvement index threshold, it is determined that the regulation is successful; otherwise, it is determined that the regulation fails.

[0067] It should be noted that when the loss reduction rate is greater than the loss reduction rate threshold and the energy efficiency improvement index is greater than the energy efficiency improvement index threshold, it indicates that the regulation measures have achieved good results. The energy loss of the equipment or system has been reduced by a greater extent than expected, and at the same time, the energy utilization efficiency has also been improved beyond expectations. This means that the regulation measures taken, such as optimizing equipment operation parameters, adopting energy-saving technologies, or improving production processes, are effective and have achieved the pre-set energy-saving and energy efficiency improvement goals. Therefore, it is determined that the regulation is successful. On the contrary, if the loss reduction rate is less than or equal to the loss reduction rate threshold, or the energy efficiency improvement index is less than or equal to the energy efficiency improvement index threshold, it means that the regulation measures have not achieved the expected results. It may be that the intensity of the regulation measures is insufficient, the method is improper, or there are some unconsidered factors affecting the energy-saving and energy efficiency improvement effects. At this time, it is necessary to further analyze the reasons and adjust the regulation strategy to achieve the expected energy-saving and energy efficiency improvement goals.

[0068] It should be noted that the present invention analyzes the power-saving requirements by region, then identifies the power-saving potential regions and conducts targeted dynamic regulation. It can accurately locate the electricity consumption characteristics of different regions, avoid the blindness of unified energy-saving strategies, achieve precise resource allocation, improve the effectiveness of energy-saving measures; it can also adjust the strategy in real time according to the electricity consumption changes in each region, improve the energy utilization efficiency, reduce the overall energy consumption, and at the same time provide a scientific basis for regional energy planning and management.

[0069] The above content is only an example and explanation of the concept of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they should fall within the protection scope of the present invention.

Claims

1. A method for intelligent power-saving protection of an amorphous alloy three-dimensional wound core, characterized in that, It includes the following steps: Collect the operation data of the amorphous alloy three-dimensional wound core, where the operation data includes the current harmonic distortion rate, the magnetic field non-uniformity coefficient, and the temperature gradient; Based on the operation data, establish a correlation model between the operation state parameters and the power loss index of the amorphous alloy three-dimensional wound core by using a multi-physics field coupling simulation algorithm; Identify the power-saving potential areas of the amorphous alloy three-dimensional wound core according to the correlation model, and generate dynamic regulation instructions by combining the operation data of the corresponding power-saving potential areas; Execute the dynamic regulation instructions, synchronously collect the power loss change data of the amorphous alloy three-dimensional wound core, and generate a power-saving effect analysis report by using the time-domain comparison analysis method.

2. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core according to claim 1, wherein: The specific acquisition method of the current harmonic distortion rate is as follows: Use a three-dimensional scanning device to obtain the three-dimensional distribution contour data of the amorphous alloy three-dimensional wound core, construct a surface contour model, divide the surface contour of the amorphous alloy three-dimensional wound core based on the spatial grid division technology, divide the surface of the amorphous alloy three-dimensional wound core into multiple sub-regions, take the center point of each sub-region as a monitoring point, and the area size of the sub-region is preset; Set current acquisition sensors at each monitoring point, use the current acquisition sensors to collect the current signals of each monitoring point based on an equally spaced cycle duration, and then input them into a harmonic analyzer to calculate the effective value of the fundamental wave and the effective values of each harmonic component through Fourier transform. Take the square root of the sum of the squares of the effective values of each harmonic component divided by the effective value of the fundamental wave as the current harmonic distortion rate of each monitoring point.

3. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core according to claim 2, wherein: The specific analysis method of the magnetic field non-uniformity coefficient is as follows: Embed multi-axis Hall sensors at each monitoring point on the surface of the amorphous alloy three-dimensional wound core to form a multi-axis Hall sensor array. Use the multi-axis Hall sensor array to collect the magnetic flux density components in each direction of each monitoring point based on an equally spaced cycle duration, and calculate the effective value of the magnetic induction intensity of each monitoring point by synthesizing the effective values of the three-dimensional magnetic induction intensity vectors of the magnetic flux density components in each direction; Perform mean value calculation and standard deviation calculation on the effective values of the magnetic induction intensity of each monitoring point to obtain the corresponding average magnetic density and magnetic field standard deviation, and then calculate the ratio of the magnetic field standard deviation to the average magnetic density to obtain the magnetic field non-uniformity coefficient of each monitoring point.

4. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core according to claim 3, characterized in that: The specific analysis method of the temperature gradient is as follows: Embed fiber Bragg grating temperature sensors at each monitoring point on the surface of the amorphous alloy three-dimensional wound core to form a fiber Bragg grating temperature sensor array. Use the fiber Bragg grating temperature sensor array to collect the temperature of each monitoring point based on an equally spaced cycle duration, and simultaneously obtain the temperatures of the corresponding adjacent monitoring points; Use a three-dimensional scanning device to obtain the temperature influence distance between each adjacent monitoring point, calculate the difference between the temperature values of each monitoring point and each adjacent monitoring point to obtain the corresponding temperature difference, and then calculate the ratio of the temperature difference to the corresponding temperature influence distance to obtain the temperature change rate; Perform mean value calculation on the temperature change rates of each monitoring point and the corresponding adjacent monitoring points to obtain the temperature gradient of each monitoring point.

5. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core according to claim 1, wherein: The specific method for establishing the correlation model between the operation state parameters and the power loss index of the amorphous alloy three-dimensional wound core is as follows: Extract the current harmonic distortion rate, magnetic field non-uniformity coefficient, and temperature gradient corresponding to each monitoring point in each monitoring area, perform normalization processing on them respectively with the preset reference values under extreme working conditions, and then generate the evaluation index of the power loss index for each monitoring area through multi-physical field data fusion analysis.

6. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core according to claim 5, characterized in that: The specific analysis method for the power-saving potential area is as follows: Extract the magnetic field non-uniformity coefficient and temperature gradient of each monitoring area, and then perform correlation analysis to obtain the thermomagnetic coupling coefficient of each monitoring area. Compare the thermomagnetic coupling coefficient with the preset thermomagnetic coupling coefficient threshold respectively. If the thermomagnetic coupling coefficient of a certain monitoring area is greater than or equal to the thermomagnetic coupling coefficient threshold, identify this monitoring area as a thermomagnetic coupling loss hot spot area; Extract the current harmonic distortion rate and magnetic field non-uniformity coefficient of each monitoring area, and compare them with the preset current harmonic distortion rate threshold and magnetic field non-uniformity coefficient threshold respectively. If the current harmonic distortion rate of a certain monitoring area is greater than the current harmonic distortion rate threshold or the magnetic field non-uniformity coefficient is greater than the magnetic field non-uniformity coefficient threshold, identify this area as a high-loss potential area; Compare the evaluation index of the power loss index of each monitoring area with the preset evaluation index threshold of the power loss index. If the evaluation index of the power loss index of a certain monitoring area is greater than the evaluation index threshold of the power loss index, identify this monitoring area as a power loss abnormal area; If a certain monitoring area is one or more of the thermomagnetic coupling loss hot spot area, high-loss potential area, and power loss abnormal area, identify this monitoring area as a power-saving potential area.

7. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core as described in claim 6, characterized in that: The specific method for generating the dynamic regulation instruction is as follows: Compare the temperature of each monitoring area with the preset reference temperature threshold, record the area with a temperature higher than the reference temperature threshold as the temperature over-standard area, count the number of temperature over-standard areas, and then calculate the ratio with the total number of monitoring areas to obtain the ratio of the number of temperature over-standard areas. If the ratio of the number of temperature over-standard areas is greater than the preset ratio threshold of the number of temperature over-standard areas, start the cooling fan to cool the temperature over-standard area; If there is a thermomagnetic coupling loss hot spot area, adjust the input voltage phase angle; If there is no thermomagnetic coupling loss hot spot area and there is a high-loss potential area, enable the active power filter to inject reverse harmonic current.

8. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core as described in claim 1, characterized in that: The power loss change data includes the loss reduction rate and the energy efficiency improvement index.

9. The intelligent power-saving protection method for an amorphous alloy three-dimensional wound core according to claim 8, wherein: The specific analysis method for the power loss change data is as follows: Obtain the average power data before regulation and the average power data under the same load condition after regulation, and then perform difference calculation and normalization processing to obtain the loss reduction rate; Obtain the output power and input power under the same load condition before and after regulation, calculate the ratio of the output power and the input power to obtain the total system efficiency before and after regulation, and perform difference calculation and normalization processing on the total system efficiency after regulation and the total system efficiency before regulation to obtain the energy efficiency improvement index.

10. A method for intelligent power-saving protection of an amorphous alloy three-dimensional wound core according to claim 8, characterized in that: The specific analysis of the power-saving effect analysis report also includes: Compare the loss reduction rate and the energy efficiency improvement index with the preset expected loss reduction rate and the expected energy efficiency improvement index. If the loss reduction rate is greater than the loss reduction rate threshold and the energy efficiency improvement index is greater than the energy efficiency improvement index threshold, it is determined that the regulation is successful; otherwise, it is determined that the regulation fails.

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