Inductive regulation method, device, adjustable reactor, medium and program product

Abstract

The application provides an inductance adjusting method and device, an adjustable reactor, a medium and a program product. It relates to the technical field of electric power. The method comprises the following steps: obtaining a working environment and a working frequency of an adjustable reactor; searching for an electric field calculation formula corresponding to the working environment in multiple electric field calculation formulas to obtain a target electric field calculation formula of the adjustable reactor, the electric field calculation formula being used to describe the relationship between dielectric characteristics and the working frequency under the working environment; obtaining a dielectric characteristic parameter of the adjustable reactor according to the target electric field calculation formula based on the working frequency of the adjustable reactor; and adjusting the inductance of the adjustable reactor based on the dielectric characteristic parameter. The application achieves the effect of accurate inductance adjustment.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to an inductance regulation method, device, adjustable reactor, dielectric and program product. Background Technology

[0002] In power systems, 220kV large-capacity adjustable reactors are core equipment supporting dynamic reactive power regulation and voltage stability control in high-voltage power grids. With their wide-range inductance regulation capability and high capacity carrying capacity, they are widely used in reactive power compensation and load fluctuation adaptation scenarios in 220kV and above high-voltage systems.

[0003] In related technologies, during electric field optimization, dielectric characteristic parameters are determined using a fixed-parameter electric field calculation formula with an adjustable reactor, and then the inductance value is adjusted in real time based on these parameters. However, in practical applications, there is a problem of inductance adjustment accuracy deviation, which significantly reduces the precision of reactive power compensation or load fluctuation adaptation in power grids.

[0004] Therefore, there is an urgent need for a highly accurate adjustable reactor inductance adjustment scheme. Summary of the Invention

[0005] This application provides inductance adjustment methods, devices, adjustable reactors, dielectrics, and program products to achieve precise inductance adjustment effects.

[0006] In a first aspect, this application provides an inductance adjustment method, comprising:

[0007] Obtain the operating environment and operating frequency of the adjustable reactor;

[0008] The electric field calculation formula corresponding to the working environment is found among multiple electric field calculation formulas to obtain the target electric field calculation formula of the adjustable reactor. The electric field calculation formula is used to describe the relationship between dielectric properties and operating frequency under the working environment.

[0009] Based on the operating frequency of the adjustable reactor, the dielectric characteristic parameters of the adjustable reactor are obtained according to the target electric field calculation formula.

[0010] The inductance of the adjustable reactor is adjusted based on the dielectric properties.

[0011] In one possible implementation, the electric field calculation formula is determined by the following methods:

[0012] Dielectric test data of the insulating components inside the adjustable reactor under multiple operating environments are obtained, and dielectric characteristic data corresponding to each operating environment are obtained. The dielectric characteristic data is used to describe the relationship between the operating environment and the operating frequency of the insulating components.

[0013] Based on the dielectric property data corresponding to each working environment, a nonlinear fitting algorithm is used to establish a piecewise function for each working environment. The piecewise function is used to describe the relationship between dielectric properties and working frequency.

[0014] By substituting the piecewise function into the electric field formula and correcting the electric field distribution parameters, the electric field calculation formula corresponding to each working environment is obtained.

[0015] In one possible implementation, based on the dielectric property data corresponding to each working environment, a nonlinear fitting algorithm is used to establish a piecewise function corresponding to each working environment, including:

[0016] The dielectric property data for each working environment are smoothed to obtain the test curve for each working environment.

[0017] A nonlinear fitting algorithm is used to fit the test curve to obtain a piecewise function corresponding to each working environment.

[0018] In one possible implementation, a nonlinear fitting algorithm is used to fit the test curve to obtain a piecewise function corresponding to each working environment, including:

[0019] Based on the operating frequency of the inflection point of the test curve, the test curve is divided to obtain multiple frequency fitting sub-intervals corresponding to the test curve.

[0020] Under the constraint of continuous boundary, a cubic polynomial function is used to fit the target data to obtain the sub-interval piecewise function corresponding to each frequency fitting sub-interval. The target data is the data set of dielectric property data corresponding to the test curve in the frequency fitting sub-interval. The sub-interval piecewise function is used to describe the relationship between dielectric properties and operating frequency in the frequency fitting sub-interval.

[0021] By integrating the sub-interval piecewise functions of multiple frequency-fitted sub-intervals corresponding to each working environment, the piecewise function corresponding to each working environment is obtained.

[0022] In one possible implementation, the piecewise function is substituted into the electric field formula to correct the electric field distribution parameters, resulting in the electric field calculation formula for each working environment, including:

[0023] Substituting the piecewise function into the electric field formula, we obtain the reference electric field calculation formula for each working environment.

[0024] Based on the reference electric field calculation formula and the adjustable reactor corresponding to each working environment, a simulation calculation model of the adjustable reactor is established.

[0025] Based on the simulation calculation model, the electric field distribution and inductance adjustment characteristics of the adjustable reactor are simulated and analyzed, and the simulation results of the adjustable reactor are obtained.

[0026] When the simulation results indicate that the adjustable point reactor meets the accuracy of the electric field calculation, the test results of adjusting the electric field of the adjustable reactor according to the working environment and the reference electric field calculation formula corresponding to each working environment are obtained.

[0027] If the experimental results indicate that the adjustable reactor for inductance adjustment using the electric field calculation formula is feasible, the reference electric field calculation formula for each working environment will be used as the electric field calculation formula for each working environment.

[0028] In one possible implementation, the dielectric properties include relative permittivity and conductivity, and / or the operating environment includes at least one of moisture content and temperature.

[0029] Secondly, this application provides an inductance adjustment device, comprising:

[0030] The acquisition module is used to acquire the operating environment and operating frequency of the adjustable reactor.

[0031] The processing module is used to find the electric field calculation formula corresponding to the working environment among multiple electric field calculation formulas, and obtain the target electric field calculation formula of the adjustable reactor. The electric field calculation formula is used to describe the relationship between dielectric properties and operating frequency under the working environment. Based on the operating frequency of the adjustable reactor, the dielectric characteristic parameters of the adjustable reactor are obtained according to the target electric field calculation formula.

[0032] The adjustment module is used to adjust the inductance of the adjustable reactor based on dielectric characteristic parameters.

[0033] In one possible implementation, the processing module determines the electric field calculation formula by means of:

[0034] Dielectric test data of the insulating components inside the adjustable reactor under multiple operating environments are obtained, and dielectric characteristic data corresponding to each operating environment are obtained. The dielectric characteristic data is used to describe the relationship between the operating environment and the operating frequency of the insulating components.

[0035] Based on the dielectric property data corresponding to each working environment, a nonlinear fitting algorithm is used to establish a piecewise function for each working environment. The piecewise function is used to describe the relationship between dielectric properties and working frequency.

[0036] By substituting the piecewise function into the electric field formula and correcting the electric field distribution parameters, the electric field calculation formula corresponding to each working environment is obtained.

[0037] In one possible implementation, the processing module is further configured to:

[0038] The dielectric property data for each working environment are smoothed to obtain the test curve for each working environment.

[0039] A nonlinear fitting algorithm is used to fit the test curve to obtain a piecewise function corresponding to each working environment.

[0040] In one possible implementation, the processing module is further configured to:

[0041] Based on the operating frequency of the inflection point of the test curve, the test curve is divided to obtain multiple frequency fitting sub-intervals corresponding to the test curve.

[0042] Under the constraint of continuous boundary, a cubic polynomial function is used to fit the target data to obtain the sub-interval piecewise function corresponding to each frequency fitting sub-interval. The target data is the data set of dielectric property data corresponding to the test curve in the frequency fitting sub-interval. The sub-interval piecewise function is used to describe the relationship between dielectric properties and operating frequency in the frequency fitting sub-interval.

[0043] By integrating the sub-interval piecewise functions of multiple frequency-fitted sub-intervals corresponding to each working environment, the piecewise function corresponding to each working environment is obtained.

[0044] In one possible implementation, the processing module is further configured to:

[0045] Substituting the piecewise function into the electric field formula, we obtain the reference electric field calculation formula for each working environment.

[0046] Based on the reference electric field calculation formula and the adjustable reactor corresponding to each working environment, a simulation calculation model of the adjustable reactor is established.

[0047] Based on the simulation calculation model, the electric field distribution and inductance adjustment characteristics of the adjustable reactor are simulated and analyzed, and the simulation results of the adjustable reactor are obtained.

[0048] When the simulation results indicate that the adjustable point reactor meets the accuracy of the electric field calculation, the test results of adjusting the electric field of the adjustable reactor according to the working environment and the reference electric field calculation formula corresponding to each working environment are obtained.

[0049] If the experimental results indicate that the adjustable reactor for inductance adjustment using the electric field calculation formula is feasible, the reference electric field calculation formula for each working environment will be used as the electric field calculation formula for each working environment.

[0050] In one possible implementation, the dielectric properties include relative permittivity and conductivity, and / or the operating environment includes at least one of moisture content and temperature.

[0051] Thirdly, this application provides an adjustable reactor, including: a memory and a processor;

[0052] The memory stores instructions that the computer executes;

[0053] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0054] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible embodiments of the first aspect.

[0055] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0056] The inductor adjustment method, apparatus, adjustable reactor, dielectric, and program products provided in this application provide data support for inductor adjustment by obtaining the operating environment and operating frequency of the adjustable reactor. By searching for the electric field calculation formula corresponding to the operating environment among multiple electric field calculation formulas, the target electric field calculation formula for the adjustable reactor is obtained. This more accurately describes the relationship between the dielectric characteristics and operating frequency of the adjustable reactor under the current operating environment, providing a reliable basis for accurately calculating dielectric characteristic parameters. Based on the operating frequency of the adjustable reactor, the dielectric characteristic parameters of the adjustable reactor are obtained according to the target electric field calculation formula. This accurately obtains the dielectric characteristic parameters of the adjustable reactor under the current operating environment and operating frequency, providing a precise basis for inductor adjustment and ensuring that the adjustable reactor operates in its optimal state. Adjusting the inductance of the adjustable reactor based on the dielectric characteristic parameters allows for more accurate adjustment of the inductance, enabling the adjustable reactor to achieve optimal operating performance in the actual working environment. Attached Figure Description

[0057] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0058] Figure 1 A schematic diagram of a scenario for the inductor adjustment method provided in an embodiment of this application;

[0059] Figure 2 A flowchart illustrating the inductance adjustment method provided in the embodiments of this application. Figure 1 ;

[0060] Figure 3 A flowchart illustrating the inductance adjustment method provided in the embodiments of this application. Figure 2 ;

[0061] Figure 4 A flowchart illustrating the inductance adjustment method provided in the embodiments of this application. Figure 3 ;

[0062] Figure 5 Test curves for dielectric property data provided in embodiments of this application;

[0063] Figure 6 This is a schematic diagram of the inductance adjustment device provided in the embodiments of this application;

[0064] Figure 7 This is a schematic diagram of the adjustable reactor provided in an embodiment of this application.

[0065] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0066] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0067] In related technologies, during electric field optimization, dielectric characteristic parameters are determined using a fixed-parameter electric field calculation formula with an adjustable reactor, and then the inductance value is adjusted in real time based on these parameters. However, in practical applications, there is a problem of inductance adjustment accuracy deviation, which significantly reduces the precision of reactive power compensation or load fluctuation adaptation in power grids.

[0068] The inductor adjustment method provided in this application, by searching for the electric field calculation formula corresponding to the working environment among multiple electric field calculation formulas, obtains the target electric field calculation formula for the adjustable reactor. This more accurately describes the relationship between the dielectric characteristics and the operating frequency of the adjustable reactor under the current working environment, providing a reliable basis for accurately calculating the dielectric characteristic parameters. Based on the operating frequency of the adjustable reactor, and according to the target electric field calculation formula, the dielectric characteristic parameters of the adjustable reactor are obtained. This accurately yields the dielectric characteristic parameters of the adjustable reactor under the current working environment and operating frequency, providing a precise basis for inductor adjustment and ensuring that the adjustable reactor operates in its optimal state. Adjusting the inductance of the adjustable reactor based on the dielectric characteristic parameters allows for more accurate inductance adjustment, enabling the adjustable reactor to achieve optimal operating performance in the actual working environment.

[0069] Figure 1 This is a schematic diagram illustrating a scenario of the inductor adjustment method provided in an embodiment of this application. Figure 1 As shown, the specific application scenarios of this application include the adjustable inductor 11 and the control center 12, wherein:

[0070] The control center 12 and the adjustable inductor 11 are communicatively connected. Optionally, the control center 12 with communication connection is deployed internally within the adjustable inductor 11. Optionally, the adjustable inductor 11 and the control center 12 are deployed separately. Optionally, the control center 12 is deployed externally to the adjustable inductor 11. The control center 12 is used to determine the target electric field calculation formula of the adjustable inductor 11 based on the operating environment and operating frequency of the adjustable inductor 11. The adjustable inductor 11 can adjust its inductance according to the target electric field calculation formula.

[0071] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0072] Figure 2 A flowchart illustrating the inductance adjustment method provided in the embodiments of this application. Figure 1 .like Figure 2 As shown, the method includes:

[0073] S201. Obtain the operating environment and operating frequency of the adjustable reactor.

[0074] An adjustable reactor is a reactor whose inductance value can be adjusted according to different circuit requirements. Adjustable reactors can be used in power electronics and power systems to compensate for reactive power and perform filtering functions. The operating frequency is the frequency of the AC signal processed by the adjustable reactor when it operates in a circuit. The operating frequency affects the inductance characteristics and inductance losses of the adjustable reactor. The operating environment refers to the surrounding environmental conditions in which the adjustable reactor operates. The operating environment affects the performance and parameters of the adjustable reactor. Optionally, the operating environment includes at least one of the following factors: temperature, humidity, air pressure, and altitude.

[0075] The operating environment of the adjustable reactor is obtained through sensors. Optionally, the sensors can be deployed separately from the adjustable reactor; the sensors can also be deployed inside the adjustable reactor; or the sensors can be deployed outside the adjustable reactor. Optionally, the sensors include at least one of the following: a temperature sensor to measure temperature, a humidity sensor to measure humidity, etc.

[0076] The operating frequency of the adjustable reactor is obtained by using a frequency detection device connected to the circuit in which the adjustable reactor is located.

[0077] S202. Find the electric field calculation formula corresponding to the working environment among multiple electric field calculation formulas to obtain the target electric field calculation formula of the adjustable reactor. The electric field calculation formula is used to describe the relationship between dielectric properties and operating frequency under the working environment.

[0078] The electric field calculation formula is a mathematical expression used to describe the relationship between various physical quantities in an electric field and parameters such as dielectric properties and operating frequency. The target electric field calculation formula is a formula that matches the current operating environment of the adjustable reactor and accurately describes the relationship between dielectric properties and operating frequency under that environment. Optional physical quantities include electric field strength and electric displacement.

[0079] The relationship between dielectric properties and operating frequency may differ under different working environments. By finding a target electric field calculation formula that conforms to the working environment, the relationship between dielectric properties and operating frequency of adjustable reactors under the current working environment can be described more accurately, providing a reliable basis for accurately calculating dielectric property parameters.

[0080] Optionally, a target electric field calculation formula that fits the working environment can be found from a database of multiple electric field calculation formulas.

[0081] Optionally, a database query system can be constructed based on multiple electric field calculation formulas. The working environment is input into the database query system, which then performs a matching search based on the working environment, finding the electric field calculation formula that matches the current working environment conditions and identifying it as the target electric field calculation formula.

[0082] S203. Based on the operating frequency of the adjustable reactor, the dielectric characteristic parameters of the adjustable reactor are obtained according to the target electric field calculation formula.

[0083] Dielectric properties are parameters used to reflect the degree of polarization of a dielectric material under the influence of an electric field. Different dielectric properties correspond to different operating states of an adjustable reactor.

[0084] Optionally, the operating frequency can be substituted into the target electric field calculation formula and solved to obtain the dielectric characteristic parameters of the adjustable reactor.

[0085] Optionally, the operating frequency and the target electric field calculation formula are input into the calculation unit. Following the mathematical rules of the target electric field calculation formula, the calculation unit substitutes the operating frequency as a known variable into the formula to perform calculations, thereby obtaining the dielectric characteristic parameters of the adjustable reactor. Optionally, the calculation unit may include one of the following: a computer, a microcontroller, etc.

[0086] By calculating based on the actual operating frequency and the matching target electric field, the dielectric characteristic parameters of the adjustable reactor under the current operating environment and operating frequency can be accurately obtained, providing a precise basis for inductance adjustment and ensuring that the adjustable reactor can work in the best condition.

[0087] S204. Adjust the inductance of the adjustable reactor based on dielectric characteristic parameters.

[0088] Inductance adjustment allows the adjustable reactor to adapt to different circuit requirements and operating conditions by changing its inductance value, thereby achieving functions such as reactive power compensation and filtering.

[0089] Based on dielectric characteristic parameters, the inductance value of the adjustable reactor is changed by controlling its adjustment mechanism. Optionally, the adjustment mechanism includes at least one of the following: a motor drive mechanism for a mechanically adjustable reactor, a transistor control circuit for an electronically adjustable reactor, etc. By accurately adjusting the dielectric characteristic parameters, the inductance of the adjustable reactor can be more precisely controlled, enabling it to achieve optimal performance in actual working environments, improving the stability and efficiency of the power system, and better meeting the circuit's requirements for reactive power compensation and filtering.

[0090] For example, if the adjustable reactor is a mechanically adjustable reactor, the motor of the mechanically adjustable reactor is controlled to rotate, moving the tap of the inductor coil, thereby changing the inductance value of the mechanically adjustable reactor, based on the correspondence between dielectric characteristic parameters and inductance value. For example, if the mechanically adjustable reactor is an electronically adjustable reactor, the inductance characteristics of the mechanically adjustable reactor are changed by controlling the conduction level of the transistors within the mechanically adjustable reactor, thus achieving inductance value adjustment.

[0091] The inductor adjustment method provided in this application provides data support for inductor adjustment by acquiring the operating environment and operating frequency of the adjustable reactor. By searching for the electric field calculation formula corresponding to the operating environment among multiple electric field calculation formulas, the target electric field calculation formula for the adjustable reactor is obtained. This more accurately describes the relationship between the dielectric characteristics and operating frequency of the adjustable reactor under the current operating environment, providing a reliable basis for accurately calculating dielectric characteristic parameters. Based on the operating frequency of the adjustable reactor, and according to the target electric field calculation formula, the dielectric characteristic parameters of the adjustable reactor are obtained. This accurately yields the dielectric characteristic parameters of the adjustable reactor under the current operating environment and operating frequency, providing a precise basis for inductor adjustment and ensuring that the adjustable reactor operates in its optimal state. Adjusting the inductance of the adjustable reactor based on the dielectric characteristic parameters allows for more accurate adjustment of the inductance, enabling the adjustable reactor to achieve optimal operating performance in the actual working environment.

[0092] Figure 3A flowchart illustrating the inductance adjustment method provided in the embodiments of this application. Figure 2 .like Figure 3 As shown, in this embodiment... Figure 2 Based on the examples, a detailed explanation is provided on how to determine the electric field calculation formula, including:

[0093] S301. Obtain dielectric test data of the insulating components inside the adjustable reactor under multiple working environments, and obtain dielectric characteristic data corresponding to each working environment. The dielectric characteristic data is used to describe the relationship between the working environment and the working frequency of the insulating components.

[0094] The internal insulation components of an adjustable reactor are used to isolate parts with different potentials and prevent leakage and breakdown. The performance of the insulation components directly affects the safety and reliability of the adjustable reactor. Common insulation materials include insulating paper, insulating varnish, and ceramics.

[0095] Dielectric test data are data obtained by testing insulating components under different operating environments and frequencies using specific dielectric testing equipment and methods. Dielectric test data reflects the dielectric properties of the insulating components. Optionally, dielectric test data may include at least one of the following: dielectric constant, dielectric loss factor, etc.

[0096] Dielectric property data is a set of data obtained by organizing and analyzing dielectric test data, used to describe the relationship between insulating components and different working environments and frequencies.

[0097] By acquiring dielectric property data under different working environments, we can gain a comprehensive understanding of the dielectric performance variation of insulating components under different conditions. This provides rich data support for the piecewise function and electric field calculation formula corresponding to each working environment, thereby improving the accuracy of performance analysis and adjustment of adjustable reactors.

[0098] Optionally, based on this method, the insulating components within the adjustable reactor are placed on a specially constructed dielectric testing platform. Dielectric testing instruments are used to test the insulating components at different operating frequencies, and the corresponding dielectric test data is recorded. This testing process is repeated for each different operating environment. The obtained data is then processed and analyzed to obtain the dielectric characteristic data corresponding to each operating environment. The dielectric testing platform can simulate different operating environments.

[0099] S302. Based on the dielectric characteristic data corresponding to each working environment, a nonlinear fitting algorithm is used to establish a piecewise function corresponding to each working environment. The piecewise function is used to describe the relationship between dielectric characteristics and working frequency.

[0100] A nonlinear fitting algorithm adjusts the parameters of a piecewise function to best fit the dielectric properties. Optionally, the nonlinear fitting algorithm can be at least one of the least squares method, the Levenberg-Marquardt algorithm, etc. The nonlinear fitting algorithm can find a set of parameters for a piecewise function that minimizes the sum of squared errors between the piecewise function values ​​and the actual values.

[0101] A piecewise function is a function that divides the operating frequency into several intervals, representing each interval with a different functional expression. Since the relationship between dielectric properties and operating frequency may exhibit different patterns in different frequency ranges, piecewise functions are used to more accurately describe this relationship. Optionally, a piecewise function can be expressed using a mathematical formula or a mathematical model.

[0102] The dielectric property data corresponding to each working environment is imported into mathematical calculation software. A suitable nonlinear fitting algorithm is selected, and the segmentation points and functional form of the piecewise function are determined based on the characteristics and distribution of the dielectric property data. Then, the nonlinear fitting algorithm is used to fit the dielectric property data, continuously adjusting the parameters of the piecewise function until the fitting error meets the error requirement, thus obtaining the piecewise function corresponding to each working environment. The error requirement is used to limit the error range between the piecewise function and the dielectric property data. Optionally, the functional form includes at least one of the following: polynomial function, exponential function, etc. Optionally, the error requirement is that the fitting error is less than or equal to 5%.

[0103] By employing a nonlinear fitting algorithm to establish a piecewise function, the complex relationship between dielectric properties and operating frequency can be described more accurately. Furthermore, the piecewise function can better adapt to the different variation patterns across different frequency bands.

[0104] Based on the dielectric property data corresponding to each working environment, a nonlinear fitting algorithm is used to establish a piecewise function for each working environment. The piecewise function is used to describe the relationship between dielectric properties and operating frequency.

[0105] For example, dielectric property data at 0℃ is fitted, and based on the operating frequency, the dielectric property data is divided into two intervals: interval 1 and interval 2. A piecewise cubic polynomial is used to fit the dielectric property data for each interval, and the sum of squared residuals between the fitted value and the dielectric property data is minimized using the least squares method to obtain the piecewise function at 0℃. The piecewise cubic polynomial can be expressed as: .

[0106] The piecewise function at 0℃ includes the relative permittivity fitting function for the first interval, the relative permittivity fitting function for the second interval, the conductivity fitting function for the first interval, and the conductivity fitting function for the second interval. Among these, the relative permittivity fitting function for the first interval... It can be represented as:

[0107]

[0108] The relative permittivity fitting function in the second interval It can be represented as:

[0109]

[0110] Conductivity fitting function in the first interval It can be represented as:

[0111]

[0112] Conductivity fitting function in the second interval It can be represented as:

[0113]

[0114] in, Indicates the operating frequency.

[0115] S303. Substitute the piecewise function into the electric field formula, correct the electric field distribution parameters, and obtain the electric field calculation formula for each working environment.

[0116] The electric field formula is a mathematical expression describing the distribution of physical quantities such as electric field intensity and electric displacement in an electric field. The electric field formula typically does not consider changes in the dielectric properties of insulating components. However, in practice, the dielectric properties of insulating components vary with the working environment and operating frequency, thus affecting the electric field distribution.

[0117] Electric field distribution parameters are parameters used in electric field formulas to describe the characteristics of electric field distribution. Optionally, electric field distribution parameters include at least one of the following: magnitude and direction of electric field intensity, magnitude of electric displacement, etc. Electric field distribution parameters are affected by the dielectric properties of the insulating component.

[0118] The piecewise function corresponding to each working environment is substituted into the electric field formula, replacing the original fixed dielectric characteristic parameters. Based on the characteristics of the piecewise function, the electric field distribution parameters in the electric field formula are modified and adjusted accordingly to ensure that the obtained electric field calculation formula can accurately reflect the electric field distribution in different frequency bands. This improves the accuracy of the calculation of the internal electric field distribution of the adjustable reactor, providing a more reliable basis for analyzing the reactor's performance, optimizing its design, and ensuring safe operation.

[0119] For example, the electric field formula It can be represented as:

[0120]

[0121] in, This refers to the voltage between windings. The vacuum permittivity, For traditional design fixed values, This refers to the thickness of the insulation layer.

[0122] Next, the relative permittivity fitting function for the first interval is... As Substituting into the electric field formula The electric field calculation formula considering dielectric property fluctuations is obtained. :

[0123]

[0124] Figure 4 A flowchart illustrating the inductance adjustment method provided in the embodiments of this application. Figure 3 .like Figure 4 As shown, in this embodiment... Figure 3 Based on the examples, a detailed explanation is provided on how to determine the electric field calculation formula, including:

[0125] In one possible implementation, step S302 may further include:

[0126] S3021. Smooth the dielectric characteristic data corresponding to each working environment to obtain the test curve corresponding to each working environment.

[0127] Smoothing can reduce noise and random fluctuations in dielectric property data, making the data smoother and more continuous, thus more clearly revealing the inherent trends and patterns of the dielectric property data. Optionally, smoothing methods include one or more of the following: locally weighted scatter smoothing, moving average method, exponential smoothing method, spline interpolation method, etc.

[0128] The test curve is a curve plotted by using the smoothed dielectric property data with the operating frequency as the horizontal axis and the dielectric property parameters as the vertical axis. The test curve can intuitively reflect the change of dielectric properties with the operating frequency.

[0129] For the dielectric property data corresponding to each working environment, an appropriate smoothing method is selected to obtain smoothed dielectric property data. Then, the smoothed dielectric property data is plotted as a test curve.

[0130] Optionally, if the dielectric property data fluctuates relatively little and has a certain periodicity, a moving average method can be used for smoothing. By setting an appropriate window size, the average value of the dielectric property data within the window is calculated to replace the dielectric property data at the center of the window. The window is then slid sequentially to complete the smoothing of all dielectric property data.

[0131] Optionally, if high smoothness and continuity are required for dielectric property data, spline interpolation can be used for smoothing. By constructing a spline function to fit the data points of the dielectric property data, a smooth test curve can be obtained.

[0132] By smoothing the dielectric property data, noise and random fluctuations can be effectively removed, making the test curve smoother and more accurate, and more clearly showing the trend of dielectric properties with operating frequency, thereby improving the accuracy and stability of nonlinear fitting.

[0133] S3022. A nonlinear fitting algorithm is used to fit the test curve to obtain the piecewise function corresponding to each working environment.

[0134] The test curve data corresponding to each working environment is imported into mathematical calculation software, and the segmentation points and function forms are determined based on the shape and characteristics of the test curves. Based on the segmentation points, multiple segmented intervals and the function form for each segmented interval are obtained. Then, a suitable nonlinear fitting algorithm is selected to fit the dielectric property data within each segmented interval. The function parameters corresponding to the function form are continuously adjusted to ensure that the error between the fitted piecewise function and the test curve meets the error requirements, thus obtaining the piecewise function corresponding to each working environment. By establishing piecewise functions, the complex nonlinear relationship between dielectric properties and operating frequency can be better described, and the dielectric property data can be fitted more accurately.

[0135] Optionally, based on the shape and characteristics of the test curve, three segmented intervals are obtained: the first segmented interval, the second segmented interval, and the third segmented interval. Where the test curve exhibits linear growth in the first segmented interval, exponential growth in the second segmented interval, and tends to plateau in the third segmented interval, then a linear function can be chosen as the function form for the first segmented interval, an exponential function for the second segmented interval, and a constant function for the third segmented interval.

[0136] In one possible implementation, step S303 may further include:

[0137] S3031. Substitute the piecewise function into the electric field formula to obtain the reference electric field calculation formula for each working environment.

[0138] By accurately substituting the piecewise function corresponding to each working environment into the electric field formula according to the variable correspondence, the reference electric field calculation formula for each working environment is obtained. The reference electric field calculation formula is a formula corresponding to each working environment and can be used for preliminary calculation of electric field strength after substituting the piecewise function into the electric field formula.

[0139] S3032. Based on the reference electric field calculation formula and the adjustable reactor corresponding to each working environment, establish a simulation calculation model of the adjustable reactor.

[0140] Simulation calculation model: A virtual model that uses computer software and mathematical methods to simulate and calculate the physical phenomena of an adjustable reactor under specific conditions. It is built based on the reference electric field calculation formula and the actual parameters of the adjustable reactor.

[0141] Based on the actual geometric dimensions and structure of the adjustable reactor, a geometric model of the adjustable reactor is established. Then, the reference electric field calculation formula corresponding to each operating environment is set as the boundary condition for electric field calculation in the geometric model. Simultaneously, the solution parameters of the geometric model are set to obtain the simulation calculation model of the adjustable reactor. By establishing the simulation calculation model, the electric field distribution of the adjustable reactor under different operating environments can be simulated and analyzed on a computer, avoiding the high cost and complexity of actual experiments. This allows for quick and convenient acquisition of electric field information under different conditions, providing important reference for the design and optimization of adjustable reactors.

[0142] S3033. Based on the simulation calculation model, the electric field distribution and inductance adjustment characteristics of the adjustable reactor are simulated and analyzed to obtain the simulation results of the adjustable reactor.

[0143] Electric field distribution refers to the distribution of the magnitude and direction of the electric field intensity at various points inside the adjustable reactor, reflecting the spatial variation characteristics of the electric field within the reactor. Inductance regulation characteristics describe the variation of the inductance value of the adjustable reactor under different operating conditions, reflecting the reactor's ability to adjust its inductance. Simulation results are data and graphs obtained after analyzing the electric field distribution and inductance regulation characteristics of the adjustable reactor using a simulation calculation model. Optionally, simulation results may include electric field intensity distribution contour maps, inductance value variation curves with operating frequency or operating environment parameters, etc.

[0144] In the established simulation model, different operating conditions are set. Based on the operating conditions, the electric field equations are solved using simulation software to perform simulation analysis on the electric field distribution and inductance adjustment characteristics of the adjustable reactor, obtaining simulation results that include both electric field distribution and inductance adjustment characteristics.

[0145] S3034. When the simulation results indicate that the adjustable point reactor meets the accuracy of the electric field calculation, obtain the test results of the adjustable reactor adjusting the electric field according to the working environment and the reference electric field calculation formula.

[0146] When the simulation results show that the electric field distribution of the adjustable reactor is reasonable under various working environments, and the calculation error of parameters such as electric field strength is within the set electric field calculation accuracy range, the experimental results of adjusting the electric field of the adjustable reactor according to the working environment and the reference electric field calculation formula are obtained.

[0147] The test results indicate that the results obtained through actual experiments can verify the accuracy and reliability of the simulation results. At the same time, the test results can further help us understand the performance of the adjustable reactor in the actual working environment, ensuring that the adjustable reactor can meet the requirements of electric field regulation in actual operation.

[0148] For example, the test results are obtained using a 220kV adjustable reactor prototype, after adjusting the electric field according to the working environment and a reference electric field calculation formula. The test results show that the actual electric field strength is as follows: [Insert actual electric field strength here]. The calculation error of the reference electric field calculation formula is 2.05%. If the expected error requirement is 5%, then the adjustable reactor for inductance adjustment using the electric field calculation formula is considered feasible at a temperature of 0℃ and an operating frequency of f=50Hz. Experimental results show that under all operating conditions, the error calculated using the reference electric field calculation formula is less than or equal to 3%, thus confirming the feasibility of the adjustable reactor for inductance adjustment using the electric field calculation formula under all operating conditions.

[0149] S3035. If the experimental results indicate that the adjustable reactor for inductance adjustment using the electric field calculation formula is feasible, the reference electric field calculation formula for each working environment shall be used as the electric field calculation formula for each working environment.

[0150] The experimental results were analyzed to examine the electric field adjustment effect of the adjustable reactor in actual tests. By judging whether the experimental results met expectations, the feasibility of using an adjustable reactor for inductance adjustment based on the electric field calculation formula was determined.

[0151] For example, by judging whether the deviation between the actual electric field value and the theoretical calculation value in the experimental results is within the allowable range, if the deviation is within the allowable range, it is determined that the adjustable reactor for inductance adjustment based on the electric field calculation formula is feasible.

[0152] If adjustable reactors are feasible, the reference electric field calculation formula for each working environment should be determined as the electric field calculation formula for each working environment to ensure the accuracy and reliability of the electric field calculation formula and guarantee the safe and stable operation of the power system.

[0153] In one possible implementation, step S3022 may further include:

[0154] Step A: Based on the operating frequency of the inflection point of the test curve, divide the test curve to obtain multiple frequency fitting sub-intervals corresponding to the test curve.

[0155] The inflection point of a test curve represents the point in the test curve where the direction of the curve changes significantly. The inflection point corresponds to the critical point where the dielectric properties change.

[0156] A frequency fitting sub-interval is a small interval divided into the entire operating frequency range covered by the test curve, based on the operating frequency of the inflection point of the test curve. Within the frequency fitting sub-interval, the dielectric properties change relatively consistently with the operating frequency.

[0157] Based on the operating frequency corresponding to the inflection point in the test curve, the entire operating frequency range involved in the test curve is divided into multiple frequency fitting sub-intervals. By dividing the test curve into frequency fitting sub-intervals, complex test curves can be classified and processed according to the characteristics of different frequency bands. This makes the variation of dielectric properties with frequency relatively simple within each frequency fitting sub-interval, improving the accuracy and effectiveness of the fitting.

[0158] For example, if the operating frequency of the test curve is 10⁻²Hz or higher, and there are inflection points at the operating frequencies of 10¹Hz and 10³Hz, then the operating frequency range can be divided into three frequency fitting sub-intervals: 10⁻²Hz - 10¹Hz, 10¹Hz - 10³Hz, and 10³Hz and higher.

[0159] Step B: Under the constraint of continuous boundary, a cubic polynomial function is used to fit the target data to obtain the sub-interval piecewise function corresponding to each frequency fitting sub-interval. The target data is the data set of dielectric property data corresponding to the test curve within the frequency fitting sub-interval. The sub-interval piecewise function is used to describe the relationship between dielectric properties and operating frequency within the frequency fitting sub-interval.

[0160] Boundary continuity constraints are used to require that the function values ​​and target derivatives of the piecewise functions obtained by fitting adjacent frequency sub-intervals be equal at the boundaries. This ensures that the entire piecewise function is continuous and smooth overall, avoiding jumps or abrupt changes. The target derivative includes at least one of the first and second derivatives. Cubic polynomial functions offer good flexibility and smoothness, enabling them to fit complex data trends effectively.

[0161] The dielectric property data corresponding to each frequency fitting sub-interval is obtained from the test curve to obtain the target data. The target data shows the variation of the dielectric property with operating frequency within the frequency fitting sub-interval.

[0162] For each frequency fitting sub-interval, a cubic polynomial function is used to fit the target data to obtain a sub-interval piecewise function. This sub-interval piecewise function describes the relationship between the dielectric properties and the operating frequency within the frequency fitting sub-interval.

[0163] Step C: By integrating the sub-interval piecewise functions of multiple frequency fitting sub-intervals corresponding to each working environment, the piecewise function corresponding to each working environment is obtained.

[0164] The piecewise functions of all frequency fitting sub-intervals corresponding to each working environment are integrated to form a complete piecewise function, so as to comprehensively and accurately describe the relationship between dielectric properties and working frequency under the working environment.

[0165] In one possible implementation, the dielectric properties include relative permittivity and conductivity, and / or the operating environment includes at least one of moisture content and temperature.

[0166] The relative permittivity is a physical quantity that reflects the degree of polarization of a dielectric, representing the ratio of its ability to store charge under an electric field to its ability to store charge in a vacuum. Different insulating materials have different relative permittivity at different frequencies and under different environments. Electrical conductivity is a physical quantity used to describe the ease with which charge flows within an insulating component, reflecting the strength of the insulating material's ability to conduct electricity.

[0167] Moisture content refers to the ratio of the mass of water contained in the insulating material to the dry mass of the insulating material. For some materials, moisture content can significantly affect the dielectric properties of the insulating component.

[0168] Temperature is a physical quantity that indicates the degree of hotness or coldness of an insulating component. Changes in temperature affect the thermal motion of molecules inside the insulating component material, thereby altering the dielectric properties of the insulating component material.

[0169] Optionally, if the operating environment includes moisture content and temperature, the dielectric test data should include the relationship between moisture content and operating frequency, and temperature and operating frequency. Optionally, the node test data should include a composite relationship between "moisture content-temperature" and operating frequency.

[0170] Figure 5 Test curves for dielectric property data provided in embodiments of this application. For example... Figure 5 As shown, the test curves for dielectric property data provided in this embodiment include:

[0171] Figure 5(a) represents the change of relative permittivity with operating frequency from 0°C to 90°C; Figure 5 (b) represents the change of relative permittivity with operating frequency from 90°C to 180°C. Figure 5 (c) represents the change in conductivity with operating frequency from 0℃ to 90℃; Figure 5 (d) represents the change in conductivity with operating frequency from 90℃ to 180℃. Figure 5 (a) Figure 5 (b) Figure 5 (c) and Figure 5 (d) The horizontal axis represents the operating frequency, and the unit is Hz. Figure 5 (a) and Figure 5 (b) The vertical axis represents the relative permittivity. Figure 5 (a) and Figure 5 (b) The vertical axis represents electrical conductivity, in Siemens per meter.

[0172] If the operating frequency is divided into a low-frequency band of 10⁻²~10²Hz and a high-frequency band above 10²Hz, then... Figure 5 (a) and Figure 5 (b) It can be observed that the relative permittivity decreases rapidly with increasing frequency in the low-frequency range, while gradually stabilizing in the high-frequency range. Furthermore, at the same operating frequency, the relative permittivity increases with higher temperatures. For example, the relative permittivity exceeds 15 in the low-frequency range at 180°C, and is less than 8 in the low-frequency range at 0°C.

[0173] pass Figure 5 (c) and Figure 5 (d) It can be observed that the conductivity increases exponentially with increasing operating frequency. Furthermore, the conductivity increases slowly at low frequencies but accelerates at high frequencies. Temperature also significantly affects conductivity; the conductivity at 180℃ is three orders of magnitude higher than that at the same frequency at 0℃.

[0174] pass Figure 5 (a) Figure 5 (b) Figure 5 (c) and Figure 5 The data in (d) can intuitively demonstrate the dependence of the dielectric properties of insulating paperboard on temperature and frequency.

[0175] Figure 6 This is a schematic diagram of the inductance adjustment device provided in an embodiment of this application. Figure 6 As shown, the inductance adjustment device 60 provided in this embodiment includes:

[0176] The acquisition module 601 is used to acquire the operating environment and operating frequency of the adjustable reactor;

[0177] The processing module 602 is used to find the electric field calculation formula corresponding to the working environment among multiple electric field calculation formulas, and obtain the target electric field calculation formula of the adjustable reactor. The electric field calculation formula is used to describe the relationship between dielectric properties and operating frequency under the working environment. Based on the operating frequency of the adjustable reactor, the dielectric characteristic parameters of the adjustable reactor are obtained according to the target electric field calculation formula.

[0178] The adjustment module 603 is used to adjust the inductance of the adjustable reactor based on dielectric characteristic parameters.

[0179] In one possible implementation, the processing module 602 determines the electric field calculation formula by: acquiring dielectric test data of the insulating components inside the adjustable reactor under multiple operating environments to obtain dielectric characteristic data corresponding to each operating environment, wherein the dielectric characteristic data is used to describe the relationship between the operating environment and the operating frequency of the insulating components; based on the dielectric characteristic data corresponding to each operating environment, using a nonlinear fitting algorithm to establish a piecewise function corresponding to each operating environment, wherein the piecewise function is used to describe the relationship between the dielectric characteristics and the operating frequency; substituting the piecewise function into the electric field formula to correct the electric field distribution parameters, thereby obtaining the electric field calculation formula corresponding to each operating environment.

[0180] In one possible implementation, the processing module 602 is further configured to: smooth the dielectric characteristic data corresponding to each working environment to obtain a test curve corresponding to each working environment; and use a nonlinear fitting algorithm to fit the test curve to obtain a piecewise function corresponding to each working environment.

[0181] In one possible implementation, the processing module 602 is further configured to: divide the test curve based on the operating frequency of the inflection point of the test curve to obtain multiple frequency fitting sub-intervals corresponding to the test curve; under the constraint of continuous boundary, fit the target data with a cubic polynomial function to obtain a sub-interval piecewise function corresponding to each frequency fitting sub-interval, wherein the target data is the data set of dielectric property data corresponding to the test curve within the frequency fitting sub-interval, and the sub-interval piecewise function is used to describe the relationship between dielectric properties and operating frequency within the frequency fitting sub-interval; and obtain a piecewise function corresponding to each operating environment by integrating the sub-interval piecewise functions of multiple frequency fitting sub-intervals corresponding to each operating environment.

[0182] In one possible implementation, the processing module 602 is further configured to: substitute the piecewise function into the electric field formula to obtain the reference electric field calculation formula for each working environment; establish a simulation calculation model of the adjustable reactor based on the reference electric field calculation formula for each working environment and the adjustable reactor; perform simulation analysis on the electric field distribution and inductance adjustment characteristics of the adjustable reactor based on the simulation calculation model to obtain the simulation results of the adjustable reactor; when the simulation results indicate that the adjustable reactor meets the electric field calculation accuracy, obtain the experimental results of the adjustable reactor adjusting the electric field according to the working environment and the reference electric field calculation formula for each working environment; if the experimental results indicate that the adjustable reactor adjusting the inductance through the electric field calculation formula is feasible, use the reference electric field calculation formula for each working environment as the electric field calculation formula for each working environment.

[0183] In one possible implementation, the dielectric properties include relative permittivity and conductivity, and / or the operating environment includes at least one of moisture content and temperature.

[0184] The inductance adjustment device provided in this embodiment can perform the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0185] Figure 7 This is a schematic diagram of the adjustable reactor provided in an embodiment of this application. Figure 7 As shown, the electronic device 70 provided in this embodiment includes at least one processor 701 and a memory 702. Optionally, the device 70 further includes a communication component 703. The processor 701, memory 702, and communication component 703 are connected via a bus 704.

[0186] In a specific implementation, at least one processor 701 executes computer execution instructions stored in memory 702, causing at least one processor 701 to perform the above-described method.

[0187] The specific implementation process of processor 701 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0188] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this application can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0189] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0190] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings of this application's embodiments are not limited to only one bus or one type of bus.

[0191] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0192] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed, implement any of the methods described above.

[0193] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random-Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0194] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0195] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0196] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0197] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0198] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0199] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0200] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for adjusting inductance, characterized in that, include: Obtain the operating environment and operating frequency of the adjustable reactor; The target electric field calculation formula of the adjustable reactor is obtained by searching for the electric field calculation formula corresponding to the working environment among multiple electric field calculation formulas. The electric field calculation formula is used to describe the relationship between the dielectric properties and the working frequency under the working environment. Based on the operating frequency of the adjustable reactor, the dielectric characteristic parameters of the adjustable reactor are obtained according to the target electric field calculation formula; The inductance of the adjustable reactor is adjusted based on the dielectric characteristic parameters.

2. The method according to claim 1, characterized in that, The electric field calculation formula is determined in the following ways, including: The dielectric test data of the insulating component inside the adjustable reactor under multiple operating environments are obtained to obtain dielectric characteristic data corresponding to each operating environment. The dielectric characteristic data is used to describe the relationship between the operating environment and the operating frequency of the insulating component. Based on the dielectric property data corresponding to each working environment, a nonlinear fitting algorithm is used to establish a piecewise function corresponding to each working environment. The piecewise function is used to describe the relationship between dielectric properties and operating frequency. Substituting the piecewise function into the electric field formula, the electric field distribution parameters are corrected to obtain the electric field calculation formula corresponding to each working environment.

3. The method according to claim 2, characterized in that, Based on the dielectric property data corresponding to each working environment, a nonlinear fitting algorithm is used to establish a piecewise function corresponding to each working environment, including: The dielectric property data for each working environment are smoothed to obtain the test curve for each working environment. A nonlinear fitting algorithm is used to fit the test curve to obtain the piecewise function corresponding to each working environment.

4. The method according to claim 3, characterized in that, The nonlinear fitting algorithm is used to fit the test curve to obtain the piecewise function corresponding to each working environment, including: Based on the operating frequency of the inflection point of the test curve, the test curve is divided to obtain multiple frequency fitting sub-intervals corresponding to the test curve. Under the constraint of continuous boundary, a cubic polynomial function is used to fit the target data to obtain a sub-interval piecewise function corresponding to each frequency fitting sub-interval. The target data is the data set of dielectric property data corresponding to the test curve within the frequency fitting sub-interval. The sub-interval piecewise function is used to describe the relationship between the dielectric property and the operating frequency within the frequency fitting sub-interval. By integrating the sub-interval piecewise functions of multiple frequency fitting sub-intervals corresponding to each working environment, the piecewise function corresponding to each working environment is obtained.

5. The method according to claim 2, characterized in that, The step of substituting the piecewise function into the electric field formula to correct the electric field distribution parameters and obtain the electric field calculation formula corresponding to each working environment includes: Substituting the piecewise function into the electric field formula, we obtain the reference electric field calculation formula for each working environment. Based on the reference electric field calculation formula and the adjustable reactor corresponding to each working environment, a simulation calculation model of the adjustable reactor is established. Based on the simulation calculation model, the electric field distribution and inductance adjustment characteristics of the adjustable reactor are simulated and analyzed to obtain the simulation results of the adjustable reactor. When the simulation results indicate that the adjustable point reactor meets the accuracy of the electric field calculation, the test results of adjusting the electric field of the adjustable reactor according to the working environment and the reference electric field calculation formula corresponding to each working environment are obtained. If the experimental results indicate that the adjustable reactor for inductance adjustment using the electric field calculation formula is feasible, the reference electric field calculation formula corresponding to each working environment shall be used as the electric field calculation formula corresponding to each working environment.

6. The method according to any one of claims 1-5, characterized in that, The dielectric properties include relative permittivity and conductivity, and / or the operating environment includes at least one of moisture content and temperature.

7. An inductance adjustment device, characterized in that, include: An acquisition module is used to acquire the operating conditions of the adjustable reactor, wherein the operating conditions include the operating environment and the operating frequency; The processing module is used to search for the electric field calculation formula corresponding to the working environment among multiple electric field calculation formulas to obtain the target electric field calculation formula of the adjustable reactor. The electric field calculation formula is used to describe the relationship between the dielectric properties and the operating frequency under the working environment. Based on the operating frequency of the adjustable reactor, the dielectric property parameters of the adjustable reactor are obtained according to the target electric field calculation formula. An adjustment module is used to adjust the inductance of the adjustable reactor based on the dielectric characteristic parameters.

8. An adjustable reactor, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed, are used to implement the method as described in any one of claims 1-6.

10. A computer program product, characterized in that, Includes a computer program, which, when executed, implements the method according to any one of claims 1-6.

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