Method and system for measuring electrical parameters of three-phase reactor

Abstract

The invention relates to the technical field of electrical variable measurement, in particular to a three-phase reactor electrical parameter measurement method and system, and the method comprises the steps: obtaining a plurality of groups of electrical parameters of a target three-phase reactor under a plurality of measurement frequencies; analyzing a similar condition among the plurality of groups of electrical parameters, and determining an environment structure coefficient corresponding to each group of electrical parameters according to the similar condition; obtaining a change interval of each group of electrical parameters, and obtaining an environment random influence degree according to interval change of the environment structure coefficient in the change interval; and 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. According to the method, the environment structure coefficient corresponding to each group of electrical parameters is determined according to the similarity, so that the capability of distinguishing actual performance change and environment interference is improved; through the random influence degree of the environment, the random influence of the environmental factors on the measurement result is quantified, and the accuracy and reliability of the electric parameter measurement result of the electric reactor are further improved.

Description

Technical Field

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

[0002] Reactors play a vital role in modern power systems and are widely used in high-voltage, ultra-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 increase in electricity demand, the market demand for reactors continues to rise. With the advancement of technology, the design and manufacture 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, the single-phase method can only be used to measure the reactance value, and the measurement results are often quite different from the factory test values ​​of the equipment. When measuring using the single-phase method, the impedance and power factor of the reactor can be calculated by applying a known AC voltage and monitoring the current and voltage at the output end. However, environmental factors such as temperature, humidity, and electromagnetic interference can cause the electrical parameter measurement results of the single-phase method to deviate from the factory test values, resulting in reduced accuracy and reliability.

[0004] Therefore, how to improve the accuracy and reliability of the electrical parameter measurement results of the reactor is a problem that needs to be solved urgently. Summary of the invention

[0005] In order to solve the technical problem of how to improve the accuracy and reliability of the electrical parameter measurement results of the reactor, the purpose of the present invention is to provide a three-phase reactor electrical parameter measurement method and system, the technical scheme adopted is as follows: The present invention provides a method for measuring electrical parameters of a three-phase reactor, the method comprising: 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 the 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.

[0006] In one embodiment of the present application, the electrical parameters include voltage, current, and power factor.

[0007] In one embodiment of the present application, the step of obtaining multiple sets 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.

[0008] In one embodiment of the present application, 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.

[0009] In one embodiment of the present application, 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.

[0010] In one embodiment of the present application, adjusting the measurement environment of the target three-phase reactor according to the degree of influence of environmental factors on the multiple sets 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.

[0011] In one embodiment of the present application, 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.

[0012] In one embodiment of the present application, adjusting the measurement environment of the target three-phase reactor according to the acceptable interval size threshold includes: 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.

[0013] In one embodiment of the present application, 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.

[0014] The present application also provides a three-phase reactor electrical parameter measurement system, the system comprising: 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 the 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.

[0015] The present invention has the following beneficial effects: First, multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies are obtained, wherein each measurement frequency corresponds to a group of the electrical parameters; then, similarities between the multiple groups of electrical parameters are analyzed, and the environmental structural coefficients corresponding to each group of the electrical parameters are determined based on the similarities, wherein the environmental structural coefficients are used to indicate the influence of the environmental factors on the structural changes of the electrical parameters; then, the variation interval of each group of the electrical parameters is obtained, and the degree of random environmental influence is obtained based on the interval changes of the environmental structural coefficients in the variation interval, wherein the degree of random environmental influence is used to indicate the influence of random environmental factors on the interval changes of the electrical parameters; finally, based on 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. In the present 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) will 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 measurement; by analyzing the similarities between multiple groups of electrical parameters and determining the environmental structure coefficient corresponding to each group of electrical parameters based on this similarity, it is possible to identify which changes are caused by environmental factors, thereby improving the ability to distinguish between real performance changes and environmental interference, thereby improving the accuracy of the measurement; based on the environmental structure coefficient, the variation range of each group of electrical parameters and its variation in these ranges are analyzed to obtain the degree of random environmental influence, quantify the random influence of environmental factors on the measurement results, and help understand how external conditions specifically affect the measurement values, which not only helps to evaluate the quality of the current measurement environment, but also provides a basis for subsequent adjustments; according to the above analysis results, the measurement environment is adjusted to eliminate or reduce the impact of adverse environmental factors, thereby achieving more accurate measurements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of an implementation environment of a method for measuring electrical parameters of a three-phase reactor provided by an embodiment of the present invention; Figure 2 A schematic flow chart of a method for measuring electrical parameters of a three-phase reactor provided by an embodiment of the present invention; Figure 3 A schematic diagram of magnetic flux of a three-phase reactor provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a three-phase reactor electrical parameter measurement system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of a three-phase reactor electrical parameter measurement method and system proposed according to the present invention, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0019] It should be noted that the terms "first", "second", etc. in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0021] It should be noted that in order to ensure that the calculation results are meaningful, when performing fractional operations in the embodiments of the present invention, when the denominator is 0, it is necessary to add a parameter adjustment factor greater than 0 to the denominator to prevent the denominator from being 0. The value of the parameter adjustment factor is set by the implementer according to actual conditions, and this application does not impose any special restrictions.

[0022] The specific scheme of a three-phase reactor electrical parameter measurement method and system provided by the present invention is described in detail below with reference to the accompanying drawings.

[0023] First of all, it should be noted that the reactor is mainly composed of windings and iron cores (if it is an iron core reactor). When AC current passes through the reactor, an alternating magnetic field is generated, thereby inducing 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: in, is the voltage, is the inductor, is the rate of change of current with time.

[0024] In single-phase measurement, for example, when measuring phase A of a three-phase reactor, an AC voltage is applied to phase A. , the measured current and phase difference , the impedance can be calculated as: in, For impedance.

[0025] Then calculate the reactance and inductance: in, is the reactance, is a sine function, is the phase difference.

[0026] Combining the inductance formula, we can get: in, is the inductor, is a known frequency, is the ratio of pi.

[0027] When measuring three-phase reactors using the single-phase method, the fluctuation of electrical data is mainly affected by a variety of environmental factors. The installation location of the equipment will also have a significant impact on the measurement results. If the reactor is placed in an area with strong electromagnetic interference, it may cause instability in electrical parameters. For example, near large transformers or other equipment with strong electromagnetic fields, the surrounding magnetic field will cause fluctuations in the measured current and voltage, which will in turn affect the performance evaluation of the reactor. Changes in ambient temperature and humidity also have a significant impact. Rising temperature may cause changes in the conductivity of the material, thereby affecting the measurement results of resistance and inductance; while high humidity may cause insulation performance to deteriorate, increase leakage current, and lead to inaccurate measurement results. Under 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 leaving the factory. The randomness and uncertainty of these environmental factors will cause large fluctuations in the measurement results. Therefore, it is necessary to distinguish the impact of environmental factors from fluctuations caused by specific factors in data analysis in order to more accurately evaluate the reliability of electrical data.

[0028] See also Figure 1 , Figure 1 The following is a schematic diagram of an implementation environment of a method for measuring electrical parameters of a three-phase reactor provided by an embodiment of the present invention. Figure 1As shown, the implementation environment includes a measurement terminal 101 and a parameter acquisition terminal 102. The measurement terminal 101 may be a terminal device equipped with a three-phase reactor electrical parameter measurement system, including but not limited to a laptop computer, a tablet computer, a handheld computer, a PAD (tablet computer), a desktop computer, etc. with local computing capabilities; the three-phase reactor electrical parameter measurement system may be implemented in the form of a target client, and the target client may be a client supporting the three-phase reactor electrical parameter measurement, such as a video client, an instant messaging client, a browser client, etc.; the measurement terminal 101 may, but is not limited to, communicate with the parameter acquisition terminal 102 through a network, and the network may include but is not limited to: a wired network, a wireless network, wherein 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-mentioned measurement terminal 101 may, but is not limited to, include a human-computer interaction screen, a processor, and a memory. The above-mentioned human-computer interaction screen may, but is not limited to, be used to display the degree of influence of environmental factors on multiple sets of electrical parameters. The above processor may be used, but is not limited to, to respond to human-computer interaction operations, execute corresponding operations, or generate corresponding instructions.

[0029] As an optional manner, the parameter acquisition terminal 102 may acquire multiple groups of electrical parameters of the target three-phase reactor at multiple measurement frequencies.

[0030] As an optional manner, the measurement terminal 101 may also be a server, which may 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 limitation to this.

[0031] As an optional manner, the following steps of the three-phase reactor electrical parameter measurement method may be performed on the measurement terminal 101: 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 the 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.

[0032] In the above method, 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) will 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 measurement; by analyzing the similarities between multiple groups of electrical parameters and determining the environmental structure coefficient corresponding to each group of electrical parameters based on this similarity, it is possible to identify which changes are caused by environmental factors, thereby improving the ability to distinguish between real performance changes and environmental interference, thereby improving the accuracy of measurement; based on the environmental structure coefficient, the variation range of each group of electrical parameters and its variation in these ranges are analyzed to obtain the degree of random environmental influence, quantify the random influence of environmental factors on the measurement results, and help understand how external conditions specifically affect the measurement values, which not only helps to evaluate the quality of the current measurement environment, but also provides a basis for subsequent adjustments; according to the above analysis results, the measurement environment is adjusted to eliminate or reduce the influence of adverse environmental factors, thereby achieving more accurate measurements.

[0033] As an optional example, this embodiment does not limit the execution subject of the above-mentioned three-phase reactor electrical parameter measurement method. The above-mentioned 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 steps of the above-mentioned three-phase reactor electrical parameter measurement method can be executed on the desktop computer.

[0034] The above section introduces the contents of an exemplary implementation environment for applying the technical solution of the present application. Next, the electrical parameter measurement method of a three-phase reactor of the present application will be introduced.

[0035] In order to solve the problem of how to improve the accuracy and reliability of the electrical parameter measurement results 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, and these embodiments will be described in detail below.

[0036] See also Figure 2 , Figure 2 A flow chart of a method for measuring electrical parameters of a three-phase reactor provided by an embodiment of the present invention, which can be applied to Figure 1 It should be understood that the method can also be applied to other exemplary implementation environments and specifically executed by devices in other implementation environments, and this embodiment does not limit the implementation environment to which the method is applicable.

[0037] like Figure 2 As shown, in an exemplary embodiment, the three-phase reactor electrical parameter measurement method includes at least steps S210 to S240, which are described in detail as follows: In step S210, a plurality of groups of electrical parameters of the target three-phase reactor at a plurality of measurement frequencies are obtained, wherein each of the measurement frequencies corresponds to a group of the electrical parameters.

[0038] Among them, the target three-phase reactor refers to a specific three-phase reactor device that is the measurement object. This type of equipment is used in the power system to limit short-circuit current, improve power quality, and perform reactive power compensation.

[0039] 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 test it at different frequencies to fully understand its performance.

[0040] Among them, electrical parameters, including but not limited to physical quantities such as voltage, current and power factor, are key indicators for measuring the working status of the reactor. By analyzing the changes in these parameters, the working efficiency and stability of the reactor can be evaluated.

[0041] In an embodiment of the present application, the electrical parameters include voltage, current, and power factor.

[0042] In step S220, similarities between the multiple groups of electrical parameters are analyzed, and environmental structural coefficients corresponding to each group of the electrical parameters are determined based on the similarities, wherein the environmental structural coefficients are used to indicate the influence of the environmental factors on the structural changes of the electrical parameters.

[0043] Among them, since the single-phase measurement process of the three-phase reactor is easily affected by various factors in the actual operating environment, the measurement results are usually manifested as the electrical parameters of the three phases A, B, and C becoming smaller to varying degrees.

[0044] For example, see Figure 3 , Figure 3 A schematic diagram of the magnetic flux of a three-phase reactor provided by an embodiment of the present invention. Figure 3 In the figure, the three-phase reactor includes 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 , the dotted line with an arrow is the direction of the magnetic flux. Figure 3In the three-phase reactor flux schematic diagram 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 A phase flux always passes through phases B and C evenly. Due to the loss of the adjustment effect of the magnetomotive force of phases B and C, the flux generated by the magnetomotive force of phase A will preferentially pass through the part with small magnetic resistance. Since the B phase iron core column is closer to phase A, ignoring the manufacturing process error, the magnetic circuit formed by 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 7.4A, and the calculated reactance value of the coil is 2.7027Ω; in the three-phase method, the magnetomotive force of phase A is 72A, the coil current is 7.2A, and the calculated reactance value of the coil is 2.7778Ω. It can be seen that the asymmetry of the magnetic circuit structure leads to large errors when measuring three-phase iron core reactors using the single-phase method, and the measured reactance value is always too small; similar to the magnetic field influence 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. The monitoring results will change significantly after the position is changed. The influence of factors such as temperature and humidity in the environment more obviously manifests the random influence on the measurement results of electrical parameters. From the perspective of the numerical value of electrical parameters, it increases the range of parameter variation and the fluctuation changes in multiple numerical values. Therefore, it is necessary to analyze the influence of environmental factors and realize the extraction of electrical parameter fluctuation conditions under different environmental factors.

[0045] The similarity refers to the similarity or difference between the electrical parameter groups obtained at different frequencies. This similarity can be quantified by mathematical methods (such as cosine similarity) to evaluate whether the change pattern of the reactor electrical parameters is consistent under different measurement conditions. The similarity helps to identify which changes are caused by environmental factors and which are caused by the characteristics of the equipment itself.

[0046] Structural changes refer to the relationship between electrical parameters at different frequencies and their pattern changes. For example, whether there is a consistent change trend or a specific relationship pattern between electrical parameters at different frequencies can help identify changes or anomalies in the internal structure of the system.

[0047] Environmental factors include temperature, humidity, electromagnetic interference, etc., which may affect the measurement results of the electrical parameters of the reactor. Understanding and quantifying these effects is crucial to improving measurement accuracy.

[0048] In step S230, the variation interval of each group of the electrical parameters is obtained, and the degree of environmental random influence is obtained according to the interval variation of the environmental structure coefficient in the variation interval, wherein the degree of environmental random influence is used to indicate the influence of random environmental factors on the interval variation of the electrical parameters.

[0049] The variation range refers to the difference between the maximum and minimum values ​​of 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, we can understand the impact of environmental factors on the measurement results and how these impacts change with changing conditions.

[0050] In step S240, the measurement environment of the target three-phase reactor is adjusted according to the degree of influence of environmental factors on the multiple groups of electrical parameters to achieve accurate measurement.

[0051] Among them, when adjusting the measurement environment of the target three-phase reactor according to the influence of environmental factors on the multiple groups 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, thereby achieving more accurate measurement.

[0052] For example, suppose you want to measure the electrical parameters of a three-phase reactor for a high-voltage transmission network. You can select three different measurement frequencies (50Hz, 60Hz, 100Hz) and record electrical parameters such as voltage, current, and power factor at each frequency. 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 at low frequencies. Calculating the difference between the maximum and minimum values ​​of the voltage and current at each frequency, it is found that the variation range at some frequencies is large, which may be due to changes in ambient 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 interference.

[0053] It can be seen from the above steps S210 to S240 that in the scheme 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) will change with the frequency, and this multi-frequency data acquisition method can provide more comprehensive information, which is helpful to identify the details that may be missed by single-frequency measurement; by analyzing the similarity between multiple groups of electrical parameters, and determining the environmental structure coefficient corresponding to each group of electrical parameters based on this similarity, it is possible to identify which changes are caused by environmental factors, thereby improving the ability to distinguish between real performance changes and environmental interference, thereby improving the accuracy of measurement; based on the environmental structure coefficient, the variation interval of each group of electrical parameters and its variation in these intervals are analyzed to obtain the degree of random environmental influence, quantify the random influence of environmental factors on the measurement results, help understand how external conditions specifically affect the measurement value, not only help to evaluate the quality of the current measurement environment, but also provide a basis for subsequent adjustments; according to the above analysis results, the measurement environment is adjusted to eliminate or reduce the influence of adverse environmental factors, thereby achieving more accurate measurement.

[0054] In one embodiment of the present application, the step of obtaining multiple sets 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.

[0055] Exemplarily, the single-phase measurement process of a three-phase reactor includes equipment preparation, ensuring that the three-phase reactor and measuring instruments (such as a multimeter, a power analyzer) are in good condition, and performing a safety check to confirm the safety of the equipment grounding and the measurement environment.

[0056] Connect any phase line of the reactor to the measuring instrument, connect to the single-phase power supply and turn on the power supply, observe the operating status of the reactor, and record the initial voltage (V) and current (I) values. Measure the voltage and current under different load conditions, use a power analyzer to record the power factor (PF), and calculate the impedance (Z = V / I) based on the voltage and current to analyze the performance of the reactor, including efficiency, power factor and impedance. In the process of acquiring data, the electrical parameters of the single phase are measured separately, and the complete three-phase electrical parameters are regarded as the same set of measurement results. The measurement process adopts multi-frequency measurement, that is, the complete three-phase measurement at multiple frequencies, and multiple sets of electrical parameters at multiple frequencies are obtained separately.

[0057] In one embodiment of the present application, analyzing the similarities between the multiple 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.

[0058] Among them, due to the electrical parameter measurement results under multiple frequencies, the influencing factors will be manifested as interval changes in the local electrical parameter values. Correspondingly, if the influencing factors tend to be types such as temperature and humidity, the interval changes will be obvious in multiple intervals, thus showing an overall impact. However, the analysis of the interval change should depend on the specific change conditions of the electrical parameter values ​​of each phase of the reactor measured by the three-phase single-phase method. For example, the change relationship of the specific electrical parameter values ​​between the three phases caused by the asymmetry of the magnetic circuit structure, that is, the relative size relationship, can more finely distinguish the electrical parameters of the three-phase reactor affected by different factors.

[0059] The phase line sequence refers to the fact that in a three-phase reactor, there are usually three phase lines (phase A, phase B, and phase C). The "phase line sequence" here refers to arranging each set of electrical parameters in a fixed order (such as ABC). This is done to ensure that data obtained at different frequencies or under different conditions can be compared and analyzed on the same basis.

[0060] Among them, cosine similarity is a method to measure the cosine value of the angle between two vectors, which is used to evaluate their directional similarity. Its value is between -1 and 1, where 1 represents the exact same direction, 0 represents the orthogonal direction, and -1 represents the exact opposite direction. In this embodiment, cosine similarity is used to quantify the similarity between different groups of electrical parameters to help identify the impact of environmental factors on the measurement results.

[0061] Exemplarily, each set of electrical parameters is arranged in the order of three phases A, B, and C to form a measurement vector, and the similarity of the measurement results between any two sets of electrical parameters can be represented by the cosine similarity of the measurement vector; Under the influence of similar magnetic circuit results, we cannot only consider the numerical size of the three-phase results. The change in the relative size relationship between the three-phase electrical parameters can better reflect the change in the similarity relationship of the measurement results. Therefore, each set of electrical parameters is arranged in ascending order according to the numerical values ​​of the three phases A, B, and C to form a sequence vector. The greater the difference in the corresponding sequence vectors, the more obvious the type of influence is on the three-phase data of the reactor. Correspondingly, for a more accurate correlation between the measurement results of any two sets of electrical parameters, the more similar the measurement vectors are and the less similar the sequence vectors are, the more obvious the structural performance of the environmental type influence factors on the two sets of electrical parameters is.

[0062] For example, The environmental structure coefficient corresponding to the group electrical parameters can be expressed as: in, Indicates Environmental structural coefficient corresponding to the group electrical parameters; Indicates A measurement vector of a set of electrical parameters; Indicates A measurement vector of a set of electrical parameters; Indicates Sequential vector of group electrical parameters; Indicates Sequential vector of group electrical parameters; Represents the norm function defined on the vector space.

[0063] in, Indicates The measurement vector of the electrical parameters of the first cosine similarity of the measurement vectors of the group electrical parameters; Indicates The order vector of the electrical parameters of the group Cosine similarity of the sequential vectors of the group electrical parameters.

[0064] in, The larger it is, the more similar the measurement vectors are, the more dissimilar the sequence vectors are, and the more obvious the structural performance of the environmental type factors affecting the two sets of electrical parameters is.

[0065] It should be noted that when obtaining the environmental structure coefficient corresponding to each group of electrical parameters, you can first obtain the similarity between any group of electrical parameters and all other groups of electrical parameters, and then obtain multiple environmental structure coefficients based on the similarity. By summing these multiple environmental structure coefficients, you can get the environmental structure coefficient of the group of electrical parameters.

[0066] In this embodiment, by constructing vectors in two ways, namely, arranging the phase lines in order and arranging the values ​​in ascending order, and using cosine similarity for comparison, the data change patterns under different conditions can be more accurately identified, thereby better understanding the impact 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 accurately quantify the specific impact of environmental factors on the measurement results, and then take corresponding adjustment measures.

[0067] In one embodiment of the present application, 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 interval variation 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.

[0068] Among them, since the environmental structural coefficient of electrical parameters is a more refined distinction between the electrical parameter changes of the three phases of the reactor from the perspective of structural changes, it only quantifies the data relationship obtained from the two measurement results and cannot reflect the impact of different environmental factors. Therefore, it is necessary to analyze the range of interval changes of electrical parameters.

[0069] Among them, the variation relationship between the environmental structure coefficients of the two adjacent groups of electrical parameters in the variation range refers to comparing the electrical parameters obtained under adjacent frequencies or adjacent conditions, and analyzing how their environmental structure coefficients change with the variation range. Specifically, the environmental structure coefficient reflects the degree of influence of environmental factors on electrical parameters under different measurement conditions. By observing the changes of these coefficients in the variation range at different frequencies, the degree of influence of random environmental factors on 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 susceptible to interference from environmental factors, so that corresponding measures can be taken to improve measurement accuracy.

[0070] For example, for the applied current data changes of different frequencies, the maximum and minimum values ​​of the single-phase data of each set of electrical parameters are extracted and recorded as the change range of the electrical parameters. ; If there are large structural changes in the corresponding electrical parameters under different frequencies, it means that the location of the reactor is more affected by random environmental factors, that is, the change relationship of the environmental structure coefficients of two adjacent groups of electrical parameters extracted in the ascending direction of frequency change is expressed as the volatility of the environmental structure coefficient sequence.

[0071] For example, The calculation formula for the degree of environmental random influence on the group electrical parameters is: in, Indicates The degree of random environmental influence on the group electrical parameters, Indicates Environmental structural coefficient corresponding to the group electrical parameters, Indicates Environmental structural coefficient corresponding to the group electrical parameters, Indicates the number of frequency groups, Indicates The variation range of the group electrical parameters, exp(-) represents the normalization operation.

[0072] in, The measurement is The more consistent the structural changes in the variation range of the group electrical parameters, the smaller the value, the more common the environmental factors it is affected by, and the greater the impact on the subsequent acquisition of the optimal range.

[0073] In this embodiment, by performing a detailed analysis of the electrical parameter variation intervals and their environmental structural coefficients at adjacent frequencies, the specific impact of environmental factors on the measurement results can be quantified more accurately. This method not only takes into account 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 random environmental influence, targeted measures can be taken to reduce the impact 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.

[0074] In one embodiment of the present application, 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.

[0075] Among them, the degree of random environmental influence on the electrical parameter variation range obtained represents the reliability of the electrical parameters of the three-phase reactor reflected by the electrical parameters. Therefore, the random influence of environmental factors can be adjusted by data interpolation, but for local intentional influences, specific measures should be taken to eliminate abnormal conditions, such as adjusting the installation position to reduce the influence of the magnetic field. It is necessary to obtain the threshold value of the acceptable range of electrical parameters to achieve preliminary screening of electrical parameter measurement results.

[0076] Among them, the acceptable interval size threshold refers to the upper limit of the range of electrical parameter variation determined according to the degree of random environmental influence. Specifically, it is a maximum allowable fluctuation range set based on the analysis results of the electrical parameter variation range obtained under different frequencies or conditions. If the variation range in the actual measurement exceeds this threshold, it is considered that the current measurement environment has large environmental interference or other problems, and adjustments need to be made to ensure the accuracy and reliability of the measurement results. This threshold can help identify which measurement data is reliable and guide how to optimize the measurement conditions.

[0077] In one embodiment of the present application, 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.

[0078] Among them, binary grouping is to group multiple groups of electrical parameters using the binary idea. Specifically, based on the interval variation of each group of data (i.e. the difference between the maximum and minimum values), the optimal grouping scheme is found by gradually narrowing the search range, so that the electrical parameters in each group have similar degrees of environmental random influence.

[0079] The cumulative sum refers to the sum of the environmental random impacts of the electrical parameters calculated in each group. This step is to quantify the overall environmental impact of each group so as to further analyze and compare the differences between different groups.

[0080] Among them, the objective function is a mathematical expression used to measure the pros and cons of each group. The objective function is usually constructed based on the cumulative sum of the degree of random environmental influence of all electrical parameters in the group. The optimization goal may be to maximize or minimize this cumulative sum, depending on the needs of the application scenario. For example, the goal here is to find a group that maximizes the cumulative sum of its degree of random environmental influence, thereby determining the largest parameter grouping.

[0081] For example, the dichotomy method is used to group the electrical parameters with the size of the variation interval as a parameter, and the objective function is constructed as the cumulative sum of the environmental random influence degrees of all electrical parameter variation intervals in the group, which can be expressed as: in, Indicates that the change interval size is used as a parameter. Indicates two target parameter groups, It represents the maximum value of the cumulative sum of the environmental random influence degrees of all electrical parameter change intervals within the group after binary grouping.

[0082] The grouping result when the cumulative sum of the environmental random influence degrees of all electrical parameter change intervals in the group after the two-grouping is obtained is the maximum, and all interval sizes of the maximum group are extracted. The environmental random influence degree is used as the interval size weight to obtain the optimal interval size as the acceptable interval size threshold.

[0083] Exemplarily, the acceptable interval size threshold may be expressed as: in, is the acceptable interval size threshold, and L is the number of electrical parameters in the maximum parameter grouping.

[0084] During the three-phase reactor measurement process, after completing each set of measurement processes to obtain the three-phase measurement results, the acceptable interval size threshold As a preliminary screening condition, when the three-phase variation range is greater than the threshold, an early warning is issued, prompting further electrical parameter reliability analysis.

[0085] In this embodiment, the electrical parameters can be effectively classified according to the degree of random influence of the environment through binary grouping, ensuring that the data in each group has similar characteristics. This refined grouping method helps to more accurately evaluate and control the impact of environmental factors. By calculating the cumulative sum of the degree of random influence of the environment of the electrical parameters in each group and constructing the objective function, the overall environmental impact of each group can be quantified. This method not only takes into account the changes in a single data point, but also comprehensively evaluates the stability of the entire group, thereby improving the accuracy of the analysis. The maximum parameter grouping is determined according to the objective function value, and the acceptable interval size threshold is set accordingly, providing a method for dynamically adjusting the measurement environment. When the actual measurement result exceeds the threshold, measures can be taken in time to adjust it to ensure the accuracy and reliability of the measurement result.

[0086] In one embodiment of the present application, adjusting the measurement environment of the target three-phase reactor according to the acceptable interval size threshold includes: 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.

[0087] In one embodiment of the present application, 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.

[0088] Among them, the environmental factors of the three-phase reactor are adjusted by taking measures to optimize or improve the unfavorable 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, by adjusting the ambient temperature to reduce the impact of temperature fluctuations on the measurement results; 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 technology or equipment to reduce background noise; other physical conditions, such as adjusting the position of the measuring equipment, replacing cables or connectors, etc.

[0089] 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 the electrical equipment and keep it running stably under various working conditions, but also prolongs the service life of the equipment and reduces the failure rate, thereby reducing maintenance and replacement costs. Accurate measurement results can enhance the reliability of the system, ensure the normal operation of the equipment under various environmental conditions, avoid safety hazards caused by performance fluctuations, and provide a basis for formulating effective maintenance strategies, so that potential problems can be discovered in a timely manner, reducing equipment downtime and maintenance costs.

[0090] Figure 4 A schematic diagram of a three-phase reactor electrical parameter measurement system provided by an embodiment of the present invention. The system can be applied to Figure 1 The system can also be applied to other exemplary implementation environments and specifically configured in other devices. This embodiment does not limit the implementation environment to which the system is applied.

[0091] like Figure 4 As shown, the exemplary three-phase reactor electrical parameter measurement system includes: A parameter acquisition module 401 is used to acquire multiple groups of electrical parameters of a target three-phase reactor at multiple measurement frequencies, wherein each measurement frequency corresponds to a group of electrical parameters; The structural change analysis module 402 is used to analyze the similarities between the plurality of groups of electrical parameters, and determine the 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 the environmental factors on the structural changes of the electrical parameters; The interval variation analysis module 403 is 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 404 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.

[0092] In this exemplary three-phase reactor electrical parameter measurement system, by measuring at different frequencies, the reactor performance under different working conditions can be captured. Because the characteristics of the reactor (such as impedance and power factor) will change with frequency, this multi-frequency data acquisition method can provide more comprehensive information and help identify details that may be missed by single-frequency measurement; by analyzing the similarities between multiple groups of electrical parameters and determining the environmental structure coefficient corresponding to each group of electrical parameters based on this similarity, it is possible to identify which changes are caused by environmental factors, thereby improving the ability to distinguish between real performance changes and environmental interference, thereby improving the accuracy of measurement; based on the environmental structure coefficient, the variation range of each group of electrical parameters and its variation in these ranges are analyzed to obtain the degree of random environmental influence, quantify the random influence of environmental factors on the measurement results, and help understand how external conditions specifically affect the measurement values, which not only helps to evaluate the quality of the current measurement environment, but also provides a basis for subsequent adjustments; according to the above analysis results, the measurement environment is adjusted to eliminate or reduce the influence of adverse environmental factors, thereby achieving more accurate measurements.

[0093] 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, wherein the specific manner in which each module and unit performs the operation has 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 is not limited here.

[0094] It should be noted that the sequence of the above embodiments of the present invention is for description only and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0095] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on 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 the 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 the 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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