Three-phase Reactor Electrical Parameter Measurement Method and System

Abstract

The present invention relates to the technical field of measuring electrical variables, and particularly relates to a method and system for measuring electrical parameters of a three-phase reactor. The method includes: obtaining multiple sets of electrical parameters of a target three-phase reactor at multiple measurement frequencies; analyzing the similarity among the multiple sets of electrical parameters, and determining the environmental structure coefficient corresponding to each set of electrical parameters according to the similarity; obtaining the variation range of each set of electrical parameters, and obtaining the degree of environmental random influence according to the interval variation of the environmental structure coefficient on the variation range; adjusting the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple sets of electrical parameters. In the present invention, the environmental structure coefficient corresponding to each set of electrical parameters is determined according to similarity, which improves the ability to distinguish the change of true performance from environmental interference; through the degree of environmental random influence, the random influence of environmental factors on the measurement result is quantified, further improving the accuracy and reliability of the measurement result of the electrical parameters of the reactor.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring electrical variables, and particularly relates to a method and system for measuring electrical parameters of a three-phase reactor. Background Art

[0002] Reactors play a crucial role in modern power systems and are widely used in high-voltage, extra-high-voltage, and ultra-high-voltage transmission networks. They are mainly used to limit short-circuit current, improve power quality, and perform reactive power compensation. With the rapid development of renewable energy and the increasing power demand, the market demand for reactors continues to rise. With technological progress, the design and manufacturing of reactors have become more efficient. At the same time, the introduction of new materials and intelligent monitoring systems has also improved the performance and reliability of reactors.

[0003] When conducting on-site tests on reactors, due to the limitations of test instruments and test sites, it is often only possible to use the single-phase method to measure the reactance value, and the measurement results often have a large difference from the factory test values of the equipment. When measuring by the single-phase method, a known AC voltage can be applied, and the current and voltage at the output end can be monitored, and then the impedance and power factor of the reactor can be calculated. However, environmental factors such as temperature, humidity, and electromagnetic interference will cause the measured results of the electrical parameters of the single-phase method to deviate from the factory test values, thereby reducing the accuracy and reliability.

[0004] Therefore, how to improve the accuracy and reliability of the measured results of the electrical parameters of reactors is an urgent problem to be solved at present. Summary of the Invention

[0005] In order to solve the technical problem of how to improve the accuracy and reliability of the measured results of the electrical parameters of reactors, the purpose of the present invention is to provide a method and system for measuring electrical parameters of a three-phase reactor, and the specific technical solutions adopted are as follows:

[0006] An embodiment of the present application provides a method for measuring electrical parameters of a three-phase reactor, and the method includes:

[0007] Obtain multiple sets of electrical parameters of a target three-phase reactor at multiple measurement frequencies, where each of the measurement frequencies corresponds to a set of the electrical parameters;

[0008] Analyze the similarity situation among the multiple sets of electrical parameters, and determine the environmental structure coefficient corresponding to each set of the electrical parameters according to the similarity situation, where the environmental structure coefficient is used to indicate the influence of environmental factors on the structural variation of the electrical parameters;

[0009] Obtain the variation ranges of the electrical parameters in each group, and obtain the degree of random environmental influence according to the interval variation of the environmental structure coefficient in the variation ranges, where the degree of random environmental influence is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters;

[0010] Adjust the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple groups of electrical parameters, so as to achieve accurate measurement.

[0011] In an embodiment of the present application, the electrical parameters include voltage, current, and power factor.

[0012] In an embodiment of the present application, the obtaining of multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies includes:

[0013] At any measurement frequency, connect the three phase lines of the target three-phase reactor to a pre-configured single-phase power supply and turn on the power supply respectively, so as to obtain a group of electrical parameters of the target three-phase reactor during operation.

[0014] In an embodiment of the present application, the analyzing the similarity situation among the multiple groups of electrical parameters and determining the environmental structure coefficient corresponding to each group of electrical parameters includes:

[0015] Arrange each group of electrical parameters in the preset phase line order to form multiple groups of measurement vectors, and use the cosine similarity between any two groups of measurement vectors as the similarity of the two groups of measurement vectors;

[0016] Arrange each group of electrical parameters in ascending order according to the numerical value to form multiple groups of sequential vectors, and use the cosine similarity between any two groups of sequential vectors as the similarity of the two groups of sequential vectors;

[0017] Determine the environmental structure coefficient corresponding to each group of electrical parameters according to the similarity of the two groups of measurement vectors and the similarity of the two groups of sequential vectors.

[0018] In an embodiment of the present application, the obtaining of the variation ranges of the electrical parameters in each group and obtaining the degree of random environmental influence according to the interval variation of the environmental structure coefficient in the variation ranges includes:

[0019] For any group of electrical parameters, extract the maximum value and the minimum value, and determine the variation range according to the difference between the maximum value and the minimum value;

[0020] Determine the degree of random environmental influence according to the variation relationship of the environmental structure coefficients of two adjacent groups of electrical parameters in the variation range.

[0021] In one embodiment of the present application, adjusting the measurement environment of the target three-phase reactor according to the influence degree of the environmental factors on the multiple groups of electrical parameters includes:

[0022] Determining the threshold value of the acceptable interval size of the electrical parameters according to the random environmental influence degree;

[0023] Adjusting the measurement environment of the target three-phase reactor according to the threshold value of the acceptable interval size.

[0024] In one embodiment of the present application, determining the threshold value of the acceptable interval size of the electrical parameters according to the random environmental influence degree includes:

[0025] Taking the interval variation as a parameter, grouping the multiple groups of electrical parameters by dichotomy to obtain target parameter groups;

[0026] Constructing an objective function according to the cumulative sum of the random environmental influence degrees of the electrical parameters within the target parameter groups;

[0027] When the cumulative sum of the random environmental influence degrees in the objective function is the largest, determining the maximum parameter group;

[0028] Determining the threshold value of the acceptable interval size according to the random environmental influence degree and the variation interval corresponding to the electrical parameters in the maximum parameter group.

[0029] In one embodiment of the present application, adjusting the measurement environment of the target three-phase reactor according to the threshold value of the acceptable interval size includes:

[0030] When the variation interval is greater than the threshold value of the acceptable interval size, giving an alarm and adjusting the environmental factors of the three-phase reactor.

[0031] In one embodiment of the present application, adjusting the environmental factors of the three-phase reactor includes:

[0032] Adjusting the environmental temperature and environmental humidity level of the target three-phase reactor;

[0033] Adding an electromagnetic shielding device to reduce the influence of external electromagnetic interference on the target three-phase reactor;

[0034] Reducing the background noise in the measurement environment of the target three-phase reactor.

[0035] An embodiment of the present application further provides a three-phase reactor electrical parameter measurement system, and the system includes:

[0036] A parameter acquisition module, configured to acquire multiple sets of electrical parameters of a target three-phase reactor at multiple measurement frequencies, wherein each of the measurement frequencies corresponds to a set of the electrical parameters;

[0037] A structural change analysis module, configured to analyze the similarity among the multiple sets of electrical parameters, and determine an environmental structure coefficient corresponding to each set of the electrical parameters according to the similarity, wherein the environmental structure coefficient is used to indicate the influence of environmental factors on the structural change of the electrical parameters;

[0038] An interval change analysis module, configured to obtain the change interval of each set of the electrical parameters, and obtain an environmental random influence degree according to the interval change of the environmental structure coefficient on the change interval, wherein the environmental random influence degree is used to indicate the influence of random environmental factors on the interval change of the electrical parameters;

[0039] An adjustment module, configured to adjust the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple sets of electrical parameters, so as to achieve accurate measurement.

[0040] The present invention has the following beneficial effects:

[0041] First, obtain multiple sets of electrical parameters of the target three-phase reactor at multiple measurement frequencies, where each of the measurement frequencies corresponds to a set of the electrical parameters; then, analyze the similarity among the multiple sets of electrical parameters, and determine the environmental structure coefficient corresponding to each set of the electrical parameters according to the similarity, where the environmental structure coefficient is used to indicate the influence of environmental factors on the structural variation of the electrical parameters; then, obtain the variation range of each set of the electrical parameters, and obtain the environmental random influence degree according to the interval variation of the environmental structure coefficient on the variation range, where the environmental random influence degree is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters; finally, adjust the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple sets of electrical parameters to achieve accurate measurement. In this application, by measuring at different frequencies, the performance of the reactor under different working conditions can be captured, because the characteristics of the reactor (such as impedance and power factor) change with the frequency. This multi-frequency data acquisition method can provide more comprehensive information and help identify details that may be missed by single-frequency point measurement; analyzing the similarity among multiple sets of electrical parameters and determining the environmental structure coefficient corresponding to each set of electrical parameters according to this similarity can identify which changes are caused by environmental factors, improve the ability to distinguish between real performance changes and environmental interference, and thus improve the accuracy of measurement; based on the environmental structure coefficient, analyze the variation range of each set of electrical parameters and their variation on these ranges to obtain the environmental random influence degree, which quantifies the random influence of environmental factors on the measurement result, helps understand how external conditions specifically affect the measured value, not only helps evaluate the quality of the current measurement environment, but also provides a basis for subsequent adjustment; adjust the measurement environment according to the above analysis results to eliminate or reduce the influence of adverse environmental factors, so as to achieve more accurate measurement. Brief Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings 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.

[0043] Figure 1 Schematic diagram of the implementation environment of a method for measuring electrical parameters of a three-phase reactor provided by an embodiment of the present invention;

[0044] Figure 2 Flow chart of a method for measuring electrical parameters of a three-phase reactor provided by an embodiment of the present invention;

[0045] Figure 3The schematic diagram of the magnetic flux of a three-phase reactor provided by an embodiment of the present invention;

[0046] Figure 4 The structural schematic diagram of a three-phase reactor electrical parameter measurement system provided by an embodiment of the present invention. Specific embodiments

[0047] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following describes in detail a three-phase reactor electrical parameter measurement method and system proposed according to the present invention, its specific embodiments, structures, features and effects in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0048] It should be noted that the terms "first", "second", etc. in the specification of this application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs.

[0050] It should be noted that to ensure the significance of the calculation results, in the fractional operations in the embodiments of the present invention, when encountering the situation where the denominator is 0, a tuning parameter factor greater than 0 needs to be added to the denominator to prevent the denominator from being 0. The value of the tuning parameter factor is set by the implementer according to the actual situation, and this application does not make special restrictions.

[0051] The following specifically describes the specific solutions of a three-phase reactor electrical parameter measurement method and system provided by the present invention in conjunction with the accompanying drawings.

[0052] First of all, it should be noted that a reactor is mainly composed of windings and an iron core (if it is an iron core reactor). When an alternating current passes through the reactor, an alternating magnetic field will be generated, thereby inducing an electromotive force in the iron core. According to Faraday's law of electromagnetic induction, the relationship between the inductance of the reactor and the current is: Among them, is voltage, is inductance, is the rate of change of current with respect to time.

[0053] In single-phase method measurement, for example, when measuring the A phase of a three-phase reactor, an AC voltage is applied to the A phase, and the measured current and the phase difference are obtained. Then the impedance can be calculated as: where is the impedance.

[0054] Furthermore, the reactance and inductance are calculated: where is the reactance, is the sine function, is the phase difference.

[0055] Combined with the formula of inductance, we can get: where is the inductance, is the known frequency, is the pi.

[0056] When performing single-phase method measurement on a three-phase reactor, the fluctuations of electrical data are mainly affected by various environmental factors. The installation position of the equipment also has a significant impact on the measurement results. If the reactor is placed in an area with strong electromagnetic interference, it may lead to instability of electrical parameters. For example, when close to a large transformer or other equipment with strong electromagnetic fields, the surrounding magnetic field will cause fluctuations in the measured current and voltage, thereby affecting the performance evaluation of the reactor. The changes in environmental temperature and humidity also have obvious effects. The increase in temperature will cause changes in the conductivity of materials, thus affecting the measurement results of resistance and inductance; while high humidity may lead to a decrease in insulation performance, an increase in leakage current, resulting in inaccurate measurement results. At low-frequency conditions, the resistance of the reactor may increase due to phenomena such as eddy current loss, further deviating from the standard value at the time of factory. The randomness and uncertainty of these environmental factors will cause large fluctuations in the measurement results. Therefore, it is necessary to distinguish the influence of environmental factors from the fluctuations caused by specific factors in data analysis in order to more accurately evaluate the reliability of electrical data.

[0057] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the implementation environment of a method for measuring electrical parameters of a three-phase reactor provided by an embodiment of the present invention. As shown in Figure 1As shown in the figure, the implementation environment includes a measurement terminal 101 and a parameter acquisition terminal 102. The measurement terminal 101 can be a terminal device configured with a three-phase reactor electrical parameter measurement system, including but not limited to a laptop computer, a tablet computer, a personal digital assistant (PDA), a desktop computer, etc. with local computing capabilities; the three-phase reactor electrical parameter measurement system can be implemented in the form of a target client, and the target client can be a video client, an instant messaging client, a browser client, etc. that support the measurement of three-phase reactor electrical parameters; the measurement terminal 101 can communicate with the parameter acquisition terminal 102 through a network, which can include but not limited to: a wired network, a wireless network, where the wired network includes: a local area network, a metropolitan area network, and a wide area network, and the wireless network includes: Bluetooth, WIFI (Wireless Fidelity, a technology that allows electronic devices to connect to a wireless local area network), and other networks that implement wireless communication. The above measurement terminal 101 can include but not limited to a human-computer interaction screen, a processor, and a memory. The above human-computer interaction screen can be used to display the influence degree of environmental factors on multiple groups of electrical parameters. The above processor can be used to respond to human-computer interaction operations, execute corresponding operations, or generate corresponding instructions.

[0058] As an alternative, the parameter acquisition terminal 102 can obtain multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies.

[0059] As an alternative, the above measurement terminal 101 can also be a server, which can be a single server, a server cluster composed of multiple servers, or a cloud server. The above is only an example, and this embodiment does not make any limitations in this regard.

[0060] As an alternative, the following steps of the three-phase reactor electrical parameter measurement method can be executed on the measurement terminal 101:

[0061] Obtain multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies, where each of the measurement frequencies corresponds to a group of the electrical parameters;

[0062] Analyze the similarity situation among the multiple groups of electrical parameters, and determine the environmental structure coefficient corresponding to each group of the electrical parameters according to the similarity situation, where the environmental structure coefficient is used to indicate the influence of environmental factors on the structural change of the electrical parameters;

[0063] Obtain the variation interval of each group of the electrical parameters, and obtain the environmental random influence degree according to the interval variation of the environmental structure coefficient on the variation interval, where the environmental random influence degree is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters;

[0064] Adjust the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple sets of electrical parameters, so as to achieve accurate measurement.

[0065] In the above method, by measuring at different frequencies, the performance of the reactor under different operating conditions can be captured. Since the characteristics of the reactor (such as impedance and power factor) change with frequency, this multi-frequency data acquisition method can provide more comprehensive information, which helps to identify details that may be missed by single-frequency point measurement; analyze the similarity between multiple sets of electrical parameters, and determine the environmental structure coefficient corresponding to each set of electrical parameters according to this similarity, which can identify which changes are caused by environmental factors, improve the ability to distinguish between real performance changes and environmental interference, and thus improve the accuracy of measurement; based on the environmental structure coefficient, analyze the variation range of each set of electrical parameters and their variation conditions in these ranges to obtain the degree of random environmental influence, quantify the random influence of environmental factors on the measurement results, help to understand how external conditions specifically affect the measured values, not only helps to evaluate the quality of the current measurement environment, but also provides a basis for subsequent adjustment; adjust the measurement environment according to the above analysis results to eliminate or reduce the influence of adverse environmental factors, so as to achieve more accurate measurement.

[0066] As an optional example, the execution subject of the above three-phase reactor electrical parameter measurement method is not limited in this embodiment. The above three-phase reactor electrical parameter measurement method can be executed on the measurement terminal 101. For example, when the measurement terminal 101 is a desktop computer, some or all of the steps of the above three-phase reactor electrical parameter measurement method can be executed on the desktop computer.

[0067] The above part introduces the content of the exemplary implementation environment applying the technical solution of the present application. Next, the three-phase reactor electrical parameter measurement method of the present application will be continued to be introduced.

[0068] To solve the problem of how to improve the accuracy and reliability of the measurement results of the electrical parameters of the reactor in the prior art, the embodiments of the present application respectively propose a three-phase reactor electrical parameter measurement method and a three-phase reactor electrical parameter measurement system. These embodiments will be described in detail below.

[0069] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of a three-phase reactor electrical parameter measurement method provided by an embodiment of the present invention. This method can be applied to Figure 1 the implementation environment shown. It should be understood that this method can also be applicable to other exemplary implementation environments and be specifically executed by devices in other implementation environments. This embodiment does not limit the implementation environment applicable to this method.

[0070] As Figure 2 shown, in an exemplary embodiment, the method for measuring the electrical parameters of a three-phase reactor includes at least steps S210 to S240, which are introduced in detail as follows:

[0071] In step S210, multiple sets of electrical parameters of the target three-phase reactor at multiple measurement frequencies are obtained, where each of the measurement frequencies corresponds to a set of the electrical parameters.

[0072] Among them, the target three-phase reactor refers to a specific three-phase reactor device used as the measurement object. Such devices are used in the power system to limit short-circuit current, improve power quality, and perform reactive power compensation, etc.

[0073] Among them, the multiple measurement frequencies refer to different AC power supply frequencies used when measuring the electrical parameters of the target three-phase reactor. Since the characteristics of the reactor change with the frequency, it is necessary to conduct tests at different frequencies to comprehensively understand its performance.

[0074] Among them, the electrical parameters include, but are not limited to, physical quantities such as voltage, current, and power factor. These are key indicators for measuring the working state of the reactor. By analyzing the changes in these parameters, the working efficiency and stability of the reactor can be evaluated.

[0075] In an embodiment of the present application, the electrical parameters include voltage, current, and power factor.

[0076] In step S220, the similarity situation between the multiple sets of electrical parameters is analyzed, and the environmental structure coefficient corresponding to each set of the electrical parameters is determined according to the similarity situation, where the environmental structure coefficient is used to indicate the influence of environmental factors on the structural variation of the electrical parameters.

[0077] Among them, since the single-phase method for measuring a three-phase reactor in the actual working environment is easily affected by various factors, the measurement results usually show that the electrical parameters of the A, B, and C phases decrease to varying degrees.

[0078] Exemplarily, refer to Figure 3 , Figure 3 which is the schematic diagram of the magnetic flux of a three-phase reactor provided by an embodiment of the present invention. In Figure 3 , the three-phase reactor includes three phases A, B, and C. The magnetic flux of phase A is , the magnetic flux of phase B is , the magnetic flux of phase C is , and the dashed line with an arrow is the magnetic flux direction. In Figure 3In the schematic diagram of the magnetic flux of the three-phase reactor shown, when the voltage applied to the three-phase iron-core reactor is a three-phase symmetrical voltage, taking phase A as the research object, the magnetic flux of phase A always uniformly passes through phases B and C. Due to the loss of the adjustment effect of the magnetomotive forces of phases B and C, the magnetic flux generated by the magnetomotive force of phase A will preferentially pass through the part with a smaller magnetic resistance. Since the iron-core column of phase B is closer to phase A, in the case of ignoring the manufacturing process error, the magnetic path formed through phase B is short and the magnetic resistance is relatively smaller. In the single-phase method, the magnetomotive force of phase A is 74 A, the coil current is 7.4 A, and the calculated reactance value of the coil is 2.7027 Ω; in the three-phase method, the magnetomotive force of phase A is 72 A, the coil current is 7.2 A, and the calculated reactance value of the coil is 2.7778 Ω. It can be seen from this that the asymmetry of the magnetic circuit structure leads to large errors easily occurring when measuring the three-phase iron-core reactor by the single-phase method, and the measured reactance value is always on the small side; and similar to the influence of the magnetic field in the actual operation area, it depends on the relative position relationship between the installation position of the three-phase reactor and the magnetic field generated by the surrounding equipment, and the monitoring results will change greatly after changing the position. Affected by factors such as temperature and humidity in the environment, the influence on the measurement results of electrical parameters is more obviously manifested as a random influence. Considering from the numerical values of electrical parameters, what it increases is the variation range of the parameters and the fluctuations in the magnitudes of multiple values. Therefore, it is necessary to analyze the influence of environmental factors to realize the extraction of the fluctuation conditions of electrical parameters under different environmental factor compositions.

[0079] Among them, the similar situation refers to the similarity or difference between electrical parameter groups obtained at different frequencies. This similarity can be quantified by mathematical methods (such as cosine similarity) to evaluate whether the change patterns of the electrical parameters of the reactor are consistent under different measurement conditions. The similar situation helps to identify which changes are caused by environmental factors and which are due to the characteristics of the equipment itself.

[0080] Among them, the structural change refers to the mutual relationship and pattern change situation between electrical parameters at different frequencies. For example, whether there is a consistent change trend or a specific relationship pattern between electrical parameters at different frequencies, which helps to identify changes or abnormalities in the internal structure of the system.

[0081] Among them, environmental factors are factors such as temperature, humidity, and electromagnetic interference, which may affect the measurement results of the electrical parameters of the reactor. Understanding and quantifying these influences is crucial for improving the measurement accuracy.

[0082] In step S230, obtain the variation intervals of each group of the electrical parameters, and obtain the environmental random influence degree according to the interval variation of the environmental structure coefficient on the variation intervals, where the environmental random influence degree is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters.

[0083] Among them, the variation range refers to the difference between the maximum value and the minimum value in the electrical parameters at the same frequency. It reflects the fluctuation range of the electrical parameters under specific measurement conditions. By analyzing the variation range, the influence degree of environmental factors on the measurement results can be understood, as well as how these influences change with the change of conditions.

[0084] In step S240, according to the influence degree of environmental factors on the multiple sets of electrical parameters, the measurement environment of the target three-phase reactor is adjusted to achieve accurate measurement.

[0085] Among them, when adjusting the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple sets of electrical parameters, corresponding measures can be taken based on the above analysis results to optimize the measurement environment, reduce or eliminate the influence of adverse environmental factors on the measurement results, so as to achieve more accurate measurement.

[0086] Exemplarily, assume that it is necessary to measure the electrical parameters of a three-phase reactor for a high-voltage power transmission network. Three different measurement frequencies (50Hz, 60Hz, 100Hz) can be selected, and electrical parameters such as voltage, current, and power factor are recorded at each frequency. By comparing the electrical parameters at different frequencies, it is found that as the frequency increases, the power factor gradually decreases, indicating that the performance of the reactor at high frequencies is different from that under low-frequency conditions. Calculate the difference between the maximum value and the minimum value of the voltage and current at each frequency, and it is found that the variation range is relatively large at some frequencies, which may be caused by the change of environmental temperature. According to the analysis results, if it is found that temperature is the main influencing factor, the experiment can be repeated under constant temperature conditions; if it is electromagnetic interference, a shielding device can be used to reduce the interference.

[0087] It can be seen from the above steps S210 to S240 that in the solution proposed in this embodiment, by measuring at different frequencies, the performance of the reactor under different working conditions can be captured, because the characteristics of the reactor (such as impedance and power factor) change with the change of frequency. This multi-frequency data acquisition method can provide more comprehensive information, which helps to identify the details that may be missed by single-frequency point measurement; analyze the similarity between multiple sets of electrical parameters, and determine the environmental structure coefficient corresponding to each set of electrical parameters according to this similarity, which can identify which changes are caused by environmental factors, improve the ability to distinguish between real performance changes and environmental interference, and thus improve the accuracy of measurement; based on the environmental structure coefficient, analyze the variation range of each set of electrical parameters and their variation on these ranges to obtain the degree of random influence of environmental factors, quantify the random influence of environmental factors on the measurement results, help to understand how external conditions specifically affect the measured values, not only helps to evaluate the quality of the current measurement environment, but also provides a basis for subsequent adjustment; adjust the measurement environment according to the above analysis results to eliminate or reduce the influence of adverse environmental factors, so as to achieve more accurate measurement.

[0088] In one embodiment of the present application, the obtaining of multiple sets of electrical parameters of the target three-phase reactor at multiple measurement frequencies includes:

[0089] At any measurement frequency, connect the three phase lines of the target three-phase reactor to a pre-configured single-phase power supply and turn on the power supply respectively to obtain a set of electrical parameters of the target three-phase reactor during operation.

[0090] Exemplarily, the single-phase method measurement process of the three-phase reactor includes equipment preparation, ensuring that the three-phase reactor and measurement instruments (such as multimeters, power analyzers) are in good condition, and performing safety inspections to confirm the grounding of the equipment and the safety of the measurement environment.

[0091] Connect any phase line of the reactor to the measurement instrument, connect to the single-phase power supply and turn on the power supply, observe the operating state of the reactor, and record the initial voltage (V) and current (I) values at the same time. Measure the voltage and current under different load conditions, use the power analyzer to record the power factor (PF), and calculate the impedance (Z = V / I) according to the voltage and current, and analyze the performance of the reactor, including efficiency, power factor and impedance. During the process of obtaining data, the electrical parameter measurements are carried out for each single phase respectively, and the complete three-phase electrical parameters are regarded as the same set of measurement results. The measurement process adopts multi-frequency determination, that is, complete three-phase measurements at multiple frequencies, and multiple sets of electrical parameters at multiple frequencies are obtained respectively.

[0092] In one embodiment of the present application, the analyzing the similarity among the multiple sets of electrical parameters and determining the environmental structure coefficient corresponding to each set of electrical parameters according to the similarity includes:

[0093] Arrange each set of electrical parameters in the preset phase line order to form multiple sets of measurement vectors, and use the cosine similarity between any two sets of measurement vectors as the similarity of the two sets of measurement vectors;

[0094] Arrange each set of electrical parameters in ascending order of numerical value to form multiple sets of sequential vectors, and use the cosine similarity between any two sets of sequential vectors as the similarity of the two sets of sequential vectors;

[0095] Determine the environmental structure coefficient corresponding to each set of electrical parameters according to the similarity of the two sets of measurement vectors and the similarity of the two sets of sequential vectors.

[0096] Among them, due to the measurement results of electrical parameters at multiple frequencies, the influencing factors will be manifested as interval variations in the values of local electrical parameters. Correspondingly, when the influencing factors tend to be types such as temperature and humidity, their interval variation conditions will be obvious in multiple intervals, thus showing an overall influence. However, the analysis of the interval variation conditions should depend on the specific variation conditions of the electrical parameter values of each phase of the reactor measured by the three-phase single-phase method. For example, the variation relationship of the specific electrical parameter values between the three phases caused by the asymmetry of the magnetic circuit structure, that is, the relative magnitude relationship, can more finely distinguish the performance of the electrical parameters of the three-phase reactor affected by different factors.

[0097] Among them, the phase sequence refers to that in a three-phase reactor, there are usually three phase lines (phase A, phase B, and phase C). Here, the "phase sequence" means arranging each set of electrical parameters in a fixed order (such as A - B - C). This is done to ensure that the data obtained under different frequencies or different conditions can be compared and analyzed on the same basis.

[0098] Among them, the cosine similarity is a method for measuring the cosine value of the angle between two vectors, used to evaluate their directional similarity. Its value ranges from -1 to 1, where 1 represents exactly the same direction, 0 represents an orthogonal direction, and -1 represents exactly the opposite direction. In this embodiment, the cosine similarity is used to quantify the similarity between different sets of electrical parameters to help identify the influence of environmental factors on the measurement results.

[0099] Exemplarily, arranging each set of electrical parameters in the order of phases A, B, and C to form a measurement vector, then for the similarity of the measurement results between any two sets of electrical parameters, it can be represented by the cosine similarity of the measurement vectors;

[0100] Under the influence of factors such as a similar magnetic circuit result, one cannot only consider the magnitudes of the three-phase results numerically. The change in the relative magnitude relationship between the three-phase electrical parameters can better reflect the change in the similarity relationship of the measurement results. Therefore, arranging each set of electrical parameters in ascending order of the numerical magnitudes of phases A, B, and C to form an order vector, the greater the difference in the corresponding order vectors, the more it indicates that there is no obvious type influence on the three-phase data of the reactor. Correspondingly, for the more accurate correlation relationship between the measurement results of any two sets of electrical parameters, it is jointly affected by the measurement vector and the order vector. The more similar the measurement vectors and the less similar the order vectors, the more obvious the structural performance of the environmental type influencing factors to which these two sets of electrical parameters are subjected.

[0101] Exemplarily, the environmental structure coefficient corresponding to the set of electrical parameters can be expressed as: Among them, represents the environmental structure coefficient corresponding to the set of electrical parameters; represents the measurement vector of the nth group of electrical parameters; represents the measurement vector of the mth group of electrical parameters; represents the sequence vector of the nth group of electrical parameters; represents the sequence vector of the mth group of electrical parameters; represents the norm function defined on the vector space.

[0102] Among them, represents the cosine similarity between the measurement vector of the nth group of electrical parameters and the measurement vector of the mth group of electrical parameters; represents the cosine similarity between the sequence vector of the nth group of electrical parameters and the sequence vector of the mth group of electrical parameters.

[0103] Among them, the larger it is, the more similar the measurement vectors are, the less similar the sequence vectors are, and the more obvious the structural performance of the environmental type influencing factors on these two groups of electrical parameters is.

[0104] It should be noted that when obtaining the environmental structure coefficient corresponding to each group of electrical parameters, the similarity between any group of electrical parameters and all other groups of electrical parameters can be obtained first, and then multiple environmental structure coefficients can be obtained according to the similarity situation. By summing these multiple environmental structure coefficients, the environmental structure coefficient of this group of electrical parameters can be obtained.

[0105] In this embodiment, by constructing vectors in two ways: arranging the phase wires in sequence and arranging the numerical values in ascending order, and using the cosine similarity for comparison, the data change patterns under different conditions can be identified more accurately, so as to better understand the influence of environmental factors on the electrical parameters of the reactor. This method not only considers the direct similarity of the original data, but also further verifies the similarity through the re - ordered data, making the evaluation more comprehensive. This helps to more precisely quantify the specific influence of environmental factors on the measurement results, and then take corresponding adjustment measures.

[0106] In an embodiment of the present application, obtaining the variation range of each group of the electrical parameters, and obtaining the environmental random influence degree according to the interval variation of the environmental structure coefficient on the variation range includes:

[0107] For any group of the electrical parameters, extract the maximum value and the minimum value, and determine the variation range according to the difference between the maximum value and the minimum value;

[0108] Determine the degree of random environmental influence based on the variation relationship of the environmental structure coefficients of two adjacent groups of the electrical parameters within the variation interval.

[0109] Among them, since the environmental structure coefficient of the electrical parameters more precisely differentiates the variation of the electrical parameters of the three phases of the reactor from the perspective of structural variation, and it only quantifies the data relationship obtained from the two measurement results and cannot reflect the influence results of different environmental factors, it is necessary to analyze the range of the interval variation of the electrical parameters.

[0110] Among them, the variation relationship of the environmental structure coefficients of two adjacent groups of the electrical parameters within the variation interval refers to comparing the electrical parameters obtained under adjacent frequencies or adjacent conditions and analyzing how their environmental structure coefficients change with the change of the variation interval. Specifically, the environmental structure coefficient reflects the influence degree of environmental factors on the electrical parameters under different measurement conditions. By observing the change of these coefficients within the variation interval at different frequencies, the influence degree of random environmental factors on the electrical parameters (i.e., the degree of random environmental influence) can be evaluated. This analysis helps to identify at which frequencies or conditions the reactor is more vulnerable to environmental factor interference, so as to take corresponding measures to improve the measurement accuracy.

[0111] Exemplarily, for the variation of the current data with different applied frequencies, the maximum value and the minimum value of the single-phase data of each group of electrical parameters obtained are extracted and recorded as the variation interval under this electrical parameter. ; correspondingly, if there are large structural variations in the electrical parameters at different frequencies, it indicates that the location where the reactor is located is more affected by random environmental factors. That is, the variation relationship of the environmental structure coefficients of two adjacent groups of electrical parameters extracted from the ascending order direction of the frequency variation is expressed as the volatility of the environmental structure coefficient sequence.

[0112] Exemplarily, the calculation formula for the degree of random environmental influence of the th group of electrical parameters is: Among them, represents the degree of random environmental influence of the th group of electrical parameters, represents the environmental structure coefficient corresponding to the th group of electrical parameters, represents the environmental structure coefficient corresponding to the th group of electrical parameters, represents the number of frequency groups, represents the th group of electrical parameter variation interval, and exp(-) represents the normalization operation.

[0113] Among them, measures the The more consistent the structural change situation is within the variation range of a set of electrical parameters, the smaller its value, the more common the influence of environmental factors it is subject to, and the greater the impact on obtaining the optimal range subsequently.

[0114] In this embodiment, by analyzing in detail the variation range of electrical parameters at adjacent frequencies and their environmental structure coefficients, the specific influence of environmental factors on the measurement results can be quantified more precisely. This method not only considers the numerical differences but also deeply analyzes the reasons behind these differences, which helps to identify key environmental variables. By identifying and quantifying the degree of environmental random influence, targeted measures can be taken to reduce the influence of adverse environmental factors, such as adjusting the temperature, humidity, or electromagnetic shielding conditions of the measurement environment, thereby improving the reliability and consistency of the measurement results.

[0115] In an embodiment of the present application, adjusting the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple sets of electrical parameters includes:

[0116] Determining the size threshold of the acceptable range of the electrical parameters according to the degree of environmental random influence;

[0117] Adjusting the measurement environment of the target three-phase reactor according to the size threshold of the acceptable range.

[0118] Among them, the degree of environmental random influence of the obtained variation range of electrical parameters represents the reliability of the electrical parameters of the three-phase reactor reflected by this electrical parameter. Therefore, for the random influence of environmental factors, data interpolation can be used for adjustment, but for local specific influence, specific measures should be taken to exclude abnormal conditions, such as adjusting the installation position to reduce magnetic field influence. It is necessary to obtain the size threshold of the acceptable range of electrical parameters to achieve a preliminary screening of the measurement results of electrical parameters.

[0119] Among them, the size threshold of the acceptable range refers to the upper limit value of a variation range of electrical parameters determined according to the degree of environmental random influence. Specifically, it is a set maximum allowable fluctuation range based on the analysis results of the variation ranges of electrical parameters obtained under different frequencies or conditions. If the variation range in actual measurement exceeds this threshold, it is considered that there are large environmental interferences or other problems in the current measurement environment, and adjustments are needed to ensure the accuracy and reliability of the measurement results. This threshold can help identify which measurement data are reliable and guide how to optimize the measurement conditions.

[0120] In an embodiment of the present application, determining the size threshold of the acceptable range of the electrical parameters according to the degree of environmental random influence includes:

[0121] Taking the variation within the interval as a parameter, the multiple groups of electrical parameters are grouped by the dichotomy method to obtain the target parameter grouping;

[0122] According to the cumulative sum of the environmental random influence degrees of the electrical parameters within the target parameter grouping, a target function is constructed;

[0123] When the cumulative sum of the environmental random influence degrees in the target function is the largest, the maximum parameter grouping is determined;

[0124] According to the environmental random influence degrees and variation intervals corresponding to the electrical parameters in the maximum parameter grouping, the size threshold of the acceptable interval is determined.

[0125] Among them, the dichotomy grouping is to group multiple groups of electrical parameters using the dichotomy idea. Specifically, based on the interval variation (i.e., the difference between the maximum value and the minimum value) of each group of data, the optimal grouping scheme is found by gradually narrowing the search range, so that the electrical parameters within each grouping have similar environmental random influence degrees.

[0126] Among them, the cumulative sum refers to calculating the total sum of the environmental random influence degrees of the electrical parameters within each grouping. This step is to quantify the overall environmental influence degree of each grouping for further analyzing and comparing the differences between different groupings.

[0127] Among them, the target function is a mathematical expression used to measure the quality of each grouping. The target function is usually constructed based on the cumulative sum of the environmental random influence degrees of all electrical parameters within the grouping. The optimization goal may be to maximize or minimize this cumulative sum, depending on the requirements of the application scenario. For example, here the goal is to find a grouping such that the cumulative sum of its environmental random influence degrees is the largest, thereby determining the maximum parameter grouping.

[0128] Exemplarily, correspondingly using the dichotomy method, with the size of the variation interval as a parameter, the grouping of electrical parameters is realized, and the target function is constructed as the cumulative sum of the environmental random influence degrees of the variation intervals of all electrical parameters within the grouping, which can be expressed as: Among them, represents taking the size of the variation interval as a parameter, represents two target parameter groupings, represents the maximum value of the cumulative sum of the environmental random influence degrees of the variation intervals of all electrical parameters within the grouping after dichotomy grouping.

[0129] Obtain the grouping result when the cumulative sum of the environmental random influence degrees of the variation intervals of all electrical parameters within the grouping after dichotomy grouping is the largest, extract all the interval sizes of the maximum grouping, take the environmental random influence degree as the interval size weight, and obtain the best interval size as the size threshold of the acceptable interval.

[0130] Exemplarily, the representation of the acceptable interval size threshold can be: Wherein, is the acceptable interval size threshold, and L is the number of electrical parameters of the maximum parameter group.

[0131] During the measurement process of the three-phase reactor, after obtaining the three-phase measurement results for each group of measurements, the acceptable interval size threshold is used as a preliminary screening condition. When the three-phase variation interval is greater than this threshold, a warning is given to prompt further reliability analysis of the electrical parameters.

[0132] In this embodiment, through the dichotomy grouping, the electrical parameters can be effectively classified according to their environmental random influence degree, ensuring that the data within each group has similar characteristics. This refined grouping method helps to more accurately evaluate and control the influence of environmental factors. By calculating the cumulative sum of the environmental random influence degree of the electrical parameters within each group and constructing an objective function, the overall environmental influence degree of each group can be quantified. This method not only considers the change of individual data points but also comprehensively evaluates the stability of the entire group, thus improving the accuracy of the analysis. Determining the maximum parameter group according to the objective function value and setting the acceptable interval size threshold accordingly provides a method for dynamically adjusting the measurement environment. When the actual measurement result exceeds this threshold, measures can be taken in a timely manner for adjustment to ensure the accuracy and reliability of the measurement result.

[0133] In an embodiment of the present application, adjusting the measurement environment of the target three-phase reactor according to the acceptable interval size threshold includes:

[0134] When the variation interval is greater than the acceptable interval size threshold, a warning is given and the environmental factors of the three-phase reactor are adjusted.

[0135] In an embodiment of the present application, adjusting the environmental factors of the three-phase reactor includes:

[0136] Adjusting the environmental temperature and environmental humidity level of the target three-phase reactor;

[0137] Adding an electromagnetic shielding device to reduce the influence of external electromagnetic interference on the target three-phase reactor;

[0138] Reducing the background noise in the measurement environment of the target three-phase reactor.

[0139] Among them, adjusting the environmental factors of the three-phase reactor means taking measures to optimize or improve the adverse factors in the measurement environment when it is detected that the variation range of the electrical parameters exceeds the preset acceptable range size threshold. These adjustments may include, but are not limited to, the following methods: temperature control, reducing the impact of temperature fluctuations on the measurement results by adjusting the ambient temperature; humidity control, using dehumidification equipment or humidifiers to maintain a relatively stable humidity level; electromagnetic shielding, adding electromagnetic shielding devices to reduce the impact of external electromagnetic interference on the measurement; noise suppression, using noise suppression technologies or equipment to reduce background noise; other physical condition adjustments, such as adjusting the position of the measurement equipment, replacing cables or connectors, etc.

[0140] In this embodiment, by effectively identifying and controlling environmental factors such as electromagnetic interference, temperature, and humidity that may affect the measurement results, the accuracy and reliability of the measurement can be significantly improved. This accuracy not only helps to optimize the overall performance of electrical equipment, enabling it to operate stably under various working conditions, but also extends the service life of the equipment, reduces the failure rate, and thus reduces the maintenance and replacement costs. Accurate measurement results can enhance the reliability of the system, ensure that the equipment operates normally under various environmental conditions, avoid potential safety hazards caused by performance fluctuations, provide a basis for formulating effective maintenance strategies, enabling timely detection of potential problems, and reducing equipment downtime and maintenance costs.

[0141] Figure 4 The structural schematic diagram of a three-phase reactor electrical parameter measurement system provided by an embodiment of the present invention. This system can be applied to Figure 1 the shown implementation environment. This system can also be applicable to other exemplary implementation environments and be specifically configured in other devices. This embodiment does not limit the implementation environment applicable to this system.

[0142] As Figure 4 shown, this exemplary three-phase reactor electrical parameter measurement system includes:

[0143] A parameter acquisition module 401, configured to acquire multiple groups of electrical parameters of a target three-phase reactor at multiple measurement frequencies, where each of the measurement frequencies corresponds to a group of the electrical parameters;

[0144] A structure variation analysis module 402, configured to analyze the similarity among the multiple groups of electrical parameters and determine an environmental structure coefficient corresponding to each group of the electrical parameters according to the similarity, where the environmental structure coefficient is used to indicate the influence of environmental factors on the structural variation of the electrical parameters;

[0145] The interval variation analysis module 403 is configured to obtain the variation intervals of the electrical parameters of each group, and obtain the degree of random environmental influence according to the interval variation of the environmental structure coefficient on the variation intervals, where the degree of random environmental influence is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters;

[0146] The adjustment module 404 is configured to adjust the measurement environment of the target three-phase reactor according to the influence degree of environmental factors on the multiple groups of electrical parameters, so as to achieve accurate measurement.

[0147] In this exemplary three-phase reactor electrical parameter measurement system, by measuring at different frequencies, the performance of the reactor under different working conditions can be captured. Since the characteristics of the reactor (such as impedance and power factor) change with frequency, this multi-frequency data acquisition method can provide more comprehensive information, which helps to identify details that may be missed by single-frequency point measurement; analyzing the similarity between multiple groups of electrical parameters and determining the environmental structure coefficients corresponding to each group of electrical parameters according to this similarity can identify which changes are caused by environmental factors, improving the ability to distinguish between real performance changes and environmental interference, thereby improving the measurement accuracy; based on the environmental structure coefficients, analyzing the variation intervals of each group of electrical parameters and their variation conditions on these intervals to obtain the degree of random environmental influence, quantifying the random influence of environmental factors on the measurement results, helping to understand how external conditions specifically affect the measured values, which not only helps to evaluate the quality of the current measurement environment, but also provides a basis for subsequent adjustment; adjusting the measurement environment according to the above analysis results to eliminate or reduce the influence of adverse environmental factors, thereby achieving more accurate measurement.

[0148] It should be noted that the three-phase reactor electrical parameter measurement system provided in the above embodiment and the three-phase reactor electrical parameter measurement method provided in the above embodiment belong to the same concept. The specific ways in which each module and unit perform operations have been described in detail in the method embodiment, and will not be repeated here. In practical applications, the three-phase reactor electrical parameter measurement system provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the system into different functional modules to complete all or part of the functions described above, and this will not be limited here either.

[0149] It should be noted that: the above sequence of the embodiments of the present invention is only for description and does not represent the superiority or inferiority of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0150] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.

Claims

1. A method for measuring electrical parameters of a three-phase reactor, characterized in that: The method comprises: Acquire multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies, wherein each of the measurement frequencies corresponds to a group of the electrical parameters; Analyzing similarities between the plurality of groups of electrical parameters, and determining an environmental structural coefficient corresponding to each group of the electrical parameters according to the similarities, wherein the environmental structural coefficient is used to indicate the influence of environmental factors on the structural changes of the electrical parameters; Obtaining the variation interval of each group of the electrical parameters, and obtaining the degree of random environmental influence according to the interval variation of the environmental structure coefficient in the variation interval, wherein the degree of random environmental influence is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters; According to the degree of influence of environmental factors on the multiple groups of electrical parameters, the measurement environment of the target three-phase reactor is adjusted to achieve accurate measurement.

2. The method for measuring electrical parameters of a three-phase reactor according to claim 1, wherein: The electrical parameters include voltage, current, and power factor.

3. The method for measuring electrical parameters of a three-phase reactor according to claim 1, characterized in that: The step of obtaining multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies includes: At any measurement frequency, the three phase lines of the target three-phase reactor are respectively connected to a preconfigured single-phase power supply and powered on to obtain a set of electrical parameters of the target three-phase reactor during operation.

4. The method for measuring electrical parameters of a three-phase reactor according to claim 1, characterized in that: The analyzing the similarities between the plurality of groups of electrical parameters and determining the environmental structure coefficient corresponding to each group of the electrical parameters according to the similarities includes: Arranging each group of the electrical parameters according to a preset phase line order to form a plurality of groups of measurement vectors, and taking the cosine similarity between any two groups of measurement vectors as the similarity of the two groups of measurement vectors; Arrange the electrical parameters of each group in ascending order according to their numerical values ​​to form multiple groups of sequence vectors, and use the cosine similarity between any two groups of sequence vectors as the similarity of the two groups of sequence vectors; According to the similarity of the two groups of measurement vectors and the similarity of the two groups of sequence vectors, the environmental structure coefficient corresponding to each group of the electrical parameters is determined.

5. The method for measuring electrical parameters of a three-phase reactor according to claim 1, characterized in that: The step of obtaining the variation interval of each group of the electrical parameters and obtaining the degree of random environmental influence according to the variation interval of the environmental structure coefficient in the variation interval includes: For any group of the electrical parameters, extract the maximum value and the minimum value, and determine the variation range according to the difference between the maximum value and the minimum value; The degree of the random influence of the environment is determined according to the variation relationship between the environmental structural coefficients of two adjacent groups of the electrical parameters in the variation interval.

6. The method for measuring electrical parameters of a three-phase reactor according to claim 5, characterized in that: The step of adjusting the measurement environment of the target three-phase reactor according to the degree of influence of environmental factors on the multiple groups of electrical parameters includes: Determining an acceptable range size threshold of the electrical parameter according to the degree of random influence of the environment; According to the acceptable interval size threshold, the measurement environment of the target three-phase reactor is adjusted.

7. The method for measuring electrical parameters of a three-phase reactor according to claim 6, characterized in that: The step of determining the acceptable range size threshold of the electrical parameter according to the degree of random influence of the environment includes: Taking the interval variation as a parameter, performing binary grouping on the multiple groups of electrical parameters to obtain target parameter grouping; Constructing an objective function according to the cumulative sum of the environmental random influence degrees of the electrical parameters in the target parameter group; When the cumulative sum of the degree of random influence of the environment in the objective function is maximum, determining the maximum parameter grouping; The acceptable interval size threshold is determined according to the environmental random influence degree and variation interval corresponding to the electrical parameters in the maximum parameter group.

8. The method for measuring electrical parameters of a three-phase reactor according to claim 6, characterized in that: The step of adjusting the measurement environment of the target three-phase reactor according to the acceptable interval size threshold comprises: When the variation interval is greater than the acceptable interval size threshold, an early warning is issued and the environmental factors of the three-phase reactor are adjusted.

9. The method for measuring electrical parameters of a three-phase reactor according to claim 8, characterized in that: The adjusting of the environmental factors of the three-phase reactor includes: adjusting the ambient temperature and humidity level of the target three-phase reactor; Adding an electromagnetic shielding device to reduce the influence of external electromagnetic interference on the target three-phase reactor; The background noise in the measurement environment of the target three-phase reactor is reduced.

10. A three-phase reactor electrical parameter measurement system, characterized in that: The system comprises: A parameter acquisition module, used to acquire multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies, wherein each of the measurement frequencies corresponds to a group of the electrical parameters; A structural change analysis module, used for analyzing similarities between the plurality of groups of electrical parameters, and determining an environmental structural coefficient corresponding to each group of the electrical parameters according to the similarities, wherein the environmental structural coefficient is used to indicate the influence of environmental factors on the structural change of the electrical parameters; An interval variation analysis module, used to obtain the variation interval of each group of the electrical parameters, and obtain the degree of random environmental influence according to the interval variation of the environmental structure coefficient in the variation interval, wherein the degree of random environmental influence is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters; The adjustment module is used to adjust the measurement environment of the target three-phase reactor according to the influence of environmental factors on the multiple groups of electrical parameters to achieve accurate measurement.

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