A structural parameter regulation and optimization method for improving the electrical performance of a wall bushing

Abstract

This invention discloses a method for structural parameter control and optimization to improve the electrical withstand capability of through-wall bushings, relating to the field of power transmission insulation equipment technology. The method includes: obtaining electrical withstand capability influence characteristics; obtaining at least one electrical withstand material; obtaining a first influence function of the mechanical protection structure's loss relative to the electrical withstand material; obtaining a second influence function of the electrical withstand material's effect on the electrical withstand capability of the through-wall bushing; obtaining a third influence function of the electrical withstand material's effect on the conductivity of the through-wall bushing; obtaining an upper limit for the thickness of at least one mechanical protection structure and an upper limit for the volume of the electrical withstand structure; obtaining at least one structural parameter scheme; selecting the structural parameter scheme with the lowest conductivity coefficient as the target structural parameter scheme; and using the parameters in the target structural parameter scheme as the actual structural parameters of the through-wall bushing. Through comprehensive optimization of the mechanical protection structure and the electrical withstand structure, sufficient electrical withstand capability and insulation performance are ensured for the electrical withstand structure throughout its average service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transmission insulation equipment, in particular to a structure parameter regulation and optimization method for improving the electrical resistance of a wall bushing. BACKGROUND

[0002] Wall bushings play a crucial role in electrical installations. When electrical wires or cables need to pass through walls, without proper protection, the wires can be damaged by friction, and even cause safety hazards such as fires. Wall bushings can effectively protect electrical wires from being damaged by walls, and also prevent walls from being damaged by the insertion of electrical wires.

[0003] Wall bushings need to have good electrical resistance because they are in direct contact with electrical wires. Existing optimization methods are relatively simple and do not adequately consider the complex environmental constraints faced by wall bushings, resulting in optimized structures that cannot meet actual needs. SUMMARY

[0004] To solve the above technical problems, a structure parameter regulation and optimization method for improving the electrical resistance of a wall bushing is provided. This technical solution solves the problem of existing optimization methods being relatively simple and not adequately considering the complex environmental constraints faced by wall bushings, resulting in optimized structures that cannot meet actual needs.

[0005] To achieve the above purposes, the technical solution adopted by the present application is as follows:

[0006] A structure parameter regulation and optimization method for improving the electrical resistance of a wall bushing, comprising:

[0007] Based on big data, the average service life of the wall bushing is obtained, and the upper limit value of the electrical conductivity coefficient of the wall bushing is obtained;

[0008] The actual use environment of the wall bushing is feature extracted to obtain at least one electrical resistance influencing feature;

[0009] At least one mechanical protection structure in the wall bushing is obtained, and an electrical resistance structure in the wall bushing structure is obtained, wherein the mechanical protection structure is an insulating material, and the cross section of the mechanical protection structure is a circular ring;

[0010] The material composition of the electrical resistance structure is obtained to obtain at least one electrical resistance material, and the cross section of the electrical resistance structure is a circular ring;

[0011] Under the condition that the time for at least one electrical resistance influencing feature to penetrate the mechanical protection structure is the average service life, a first influence function of the mechanical protection structure relative to the loss of the electrical resistance material is obtained;

[0012] obtaining a second influence function of the electrically resistant material on the electric resistance of the bushing, and obtaining a third influence function of the electrically resistant material on the electric conductivity of the bushing;

[0013] based on the actual use environment of the bushing, obtaining an upper limit of the thickness of the mechanical protection structure and an upper limit of the volume of the electrically resistant structure;

[0014] under the constraints of the upper limit of the volume and the upper limit of the electric conductivity coefficient, obtaining at least one structure parameter scheme, the structure parameter scheme being composed of the thickness of the mechanical protection structure and the proportion of the electrically resistant material;

[0015] calculating the electric conductivity coefficient of the structure parameter scheme, and selecting the structure parameter scheme with the minimum electric conductivity coefficient as the target structure parameter scheme;

[0016] using the parameters in the target structure parameter scheme as the actual structure parameters of the bushing.

[0017] Preferably, the feature extraction of the actual use environment of the bushing to obtain at least one electrically resistant influence feature comprises the following steps:

[0018] feature extraction of the actual use environment of the bushing to obtain at least one environmental influence factor;

[0019] based on big data, obtaining the average value of the environmental influence factor, and collecting the values with a difference greater than a preset difference from the average value of the environmental influence factor to form a feature range of the environmental influence factor;

[0020] uniformly taking at least one identification point in the feature range of the environmental influence factor;

[0021] under the condition that the value of the environmental influence factor is equal to the value of the identification point, obtaining the actual service life of the bushing;

[0022] taking the average of the actual service life of the bushing to obtain the actual average service life;

[0023] when the difference between the actual average service life and the average service life is greater than a preset value, the environmental influence factor is taken as the electrically resistant influence feature.

[0024] Preferably, the material composition of the electrically resistant structure is obtained, and at least one electrically resistant material comprises the following steps:

[0025] based on big data, obtaining at least one use consumable for bushing production;

[0026] obtaining the light absorption parameters of the use consumable under spectral analysis, and the spectral analysis uses infrared spectrum;

[0027] For the electrically resistant structure, the sample is crushed into powder and centrifuged to separate at least one component of the material to be tested;

[0028] Spectral analysis of the composition of the material to be tested is performed to obtain the actual light absorption parameters;

[0029] The consumable material corresponding to the light absorption parameters that are consistent with the actual light absorption parameters is used as the electrical resistance material.

[0030] Preferably, obtaining the first influence function of the mechanical protective structure relative to the loss of the electrical-resistant material includes the following steps:

[0031] Based on historical data, obtain the structural thickness range of the mechanical protection structure, and uniformly take at least one sampling point within the structural thickness range;

[0032] Under the condition that the thickness of the mechanical protective structure is the value at the sampling point, the conditional service life of the through-wall sleeve is obtained;

[0033] The first impact ratio is obtained by comparing the conditional service life with the average service life.

[0034] By pairing and fitting the sampling points with the first influence ratio, the first influence function is obtained, where the values ​​at the sampling points are independent variables and the first influence ratio is the dependent variable.

[0035] Preferably, obtaining the second influence function of the electrical resistance of the resistant material relative to the electrical resistance of the through-wall bushing includes the following steps:

[0036] Take the interval (0, 1) as the feature interval, and uniformly take at least one sampling point in the feature interval;

[0037] A dielectric withstand test structure is generated, and the proportion of dielectric withstand material used in the dielectric withstand test structure is equal to the value at the sampling point. The remaining part of the dielectric withstand test structure uses the sample insulation material.

[0038] Obtain the first service life of the through-wall bushing using the electrical resistance test structure;

[0039] The second impact ratio is obtained by comparing the first service life with the average service life.

[0040] By pairing and fitting the sampling points with the second influence ratio, the second influence function is obtained, where the values ​​at the sampling points are independent variables and the second influence ratio is the dependent variable.

[0041] Preferably, obtaining the third influence function of the electrical resistance material relative to the conductivity of the through-wall bushing includes the following steps:

[0042] Based on big data, the average conductivity of the wall bushing is obtained;

[0043] Obtain the conductivity test values ​​of the through-wall bushing using the electrical withstand test structure;

[0044] The conductivity test value is compared with the average conductivity value to obtain the third influence ratio;

[0045] By pairing and fitting the sampling points with the third influence ratio, the third influence function is obtained, where the values ​​at the sampling points are independent variables and the third influence ratio is the dependent variable.

[0046] Preferably, obtaining the upper limit of the thickness of at least one mechanical protective structure includes the following steps:

[0047] Based on the limitations of the actual usage environment, the maximum volume and maximum radius of the wall bushing are obtained, and the characteristic radius of the cable protected by the wall bushing is obtained, where the maximum radius is the outer ring radius of the wall bushing.

[0048] Based on big data, obtain the first volume percentage of at least one mechanical protection structure and the second volume percentage of the electrical resistance structure in the wall bushing.

[0049] Multiply the maximum volume by the proportion of the first volume to get the first volume; multiply the maximum volume by the proportion of the second volume to get the second volume.

[0050] The third volume is calculated using the area ratio formula;

[0051] The second volume is added to the third volume to obtain the fourth volume;

[0052] Based on the fourth volume and the maximum volume, the radius limit value of the electrical-resistant structure is calculated, where the radius limit value is the radius of the outer ring of the electrical-resistant structure;

[0053] Subtracting the radius limit from the maximum radius yields the upper limit of thickness, which is the upper limit of the total thickness of all mechanical protective structures.

[0054] The formula for the area ratio is as follows:

[0055]

[0056] Where V is the third volume, r is the characteristic radius, R is the maximum radius, and M is the maximum volume.

[0057] Preferably, obtaining the upper limit of the volume of the electrically resistant structure includes the following steps:

[0058] The second volume is used as the upper limit of the volume of the electrical-resistant structure.

[0059] Preferably, obtaining at least one structural parameter scheme under the constraints of upper limits on volume and upper limits on conductivity includes the following steps:

[0060] Generate at least one characteristic thickness of the mechanical protective structure, respectively , ..., satisfied , , ..., All are integer multiples of c, where c is the first adjustment precision, e is the upper limit of thickness, and n is the total number of at least one mechanical protective structure.

[0061] The characteristic proportions of generating at least one electrically resistant material are respectively , ..., satisfied , , ..., All are integer multiples of d, where d is the second control precision and m is the total number of at least one electrically resistant material;

[0062] The characteristic thickness of at least one mechanical protective structure constitutes a group of characteristic thicknesses;

[0063] At least one electrical-resistant material has a characteristic proportion, which constitutes a characteristic proportion group;

[0064] Randomly combine feature thickness groups and feature percentage groups to form at least one preliminary parameter scheme;

[0065] Use the dielectric constant formula to calculate the dielectric constant of the pre-parameter scheme, and use the conductivity formula to calculate the conductivity of the pre-parameter scheme.

[0066] Select a preliminary parameter scheme with a conductivity coefficient less than the upper limit of the conductivity coefficient as an alternative parameter scheme;

[0067] The alternative parameter scheme with an electrical resistance coefficient greater than the electrical resistance critical value is selected as the structural parameter scheme. The electrical resistance critical value is obtained based on big data and is the average value of the qualified through-wall bushing calculated based on the electrical resistance formula.

[0068] The formula for withstand voltage is as follows:

[0069]

[0070] Where A is the dielectric constant, and i and j are subscripts. The first influence function, This is the second influence function;

[0071] The conductivity formula is as follows:

[0072]

[0073] Where B is the conductivity coefficient. This is the third influence function.

[0074] Preferably, the calculation of the conductivity coefficient of the structural parameter scheme includes the following steps:

[0075] The conductivity coefficient of the preliminary parameter scheme, which has the same parameters as the structural parameter scheme, is used as the conductivity coefficient of the structural parameter scheme.

[0076] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0077] By comprehensively optimizing the mechanical protection structure and the electrical resistance structure, the optimized through-wall bushing can be guaranteed to have sufficient electrical resistance performance, preventing fatigue damage due to long-term operation in high-voltage environments and thus enabling long-term operation. At the same time, the insulation performance of the optimized through-wall bushing is guaranteed, avoiding leakage. In addition, during the optimization process, the limitations of complex environments and the impact of external factors such as moisture and humidity on the electrical resistance structure's wear are considered, ensuring that the optimized electrical resistance structure can still maintain sufficient electrical resistance performance within its average service life under external influences, thereby meeting actual usage requirements. Attached Figure Description

[0078] Figure 1 This is a flowchart illustrating the structural parameter adjustment and optimization method for improving the electrical resistance of through-wall bushings according to the present invention.

[0079] Figure 2 This is a schematic diagram illustrating the process of extracting features from the actual usage environment of the wall bushing according to the present invention to obtain at least one electrical resistance feature.

[0080] Figure 3 This is a schematic diagram illustrating the process of obtaining at least one electrically resistant material to achieve the material composition of the electrically resistant structure according to the present invention.

[0081] Figure 4 This is a flowchart illustrating the process of obtaining the first influence function of the mechanical protection structure relative to the loss of the electrical-resistant material according to the present invention.

[0082] Figure 5 This is a schematic flowchart illustrating the process of obtaining the second influence function of the electrical resistance of the resistant material relative to the electrical resistance of the wall bushing according to the present invention.

[0083] Figure 6 This is a schematic diagram of the process for obtaining the third influence function of the electrical conductivity of the resistant material relative to the wall bushing according to the present invention.

[0084] Figure 7 This is a schematic diagram illustrating the process of obtaining the upper limit of the thickness of at least one mechanical protective structure according to the present invention;

[0085] Figure 8 This is a schematic diagram illustrating the process of obtaining at least one structural parameter scheme under the constraints of upper limits on volume and upper limits on conductivity. Detailed Implementation

[0086] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0087] Reference Figure 1 As shown, a method for adjusting and optimizing structural parameters to improve the electrical withstand performance of through-wall bushings includes:

[0088] Based on big data, the average service life of the wall bushing is obtained, and the upper limit of the conductivity coefficient of the wall bushing is obtained.

[0089] Feature extraction is performed on the actual usage environment of the wall bushing to obtain at least one electrical resistance influence feature;

[0090] Obtain at least one mechanical protection structure in the wall bushing, and obtain the electrical resistance structure in the wall bushing structure, wherein the mechanical protection structure is an insulating material and the cross-section of the mechanical protection structure is a circular ring;

[0091] Obtain the material composition of the electrically resistant structure to obtain at least one electrically resistant material, and the cross-section of the electrically resistant structure is a circular ring;

[0092] Under the condition that the time for at least one electrical resistance feature to penetrate the mechanical protective structure is equal to the average service life, obtain the first influence function of the mechanical protective structure relative to the loss of the electrical resistance material.

[0093] Obtain the second influence function of the electrical resistance of the resistant material relative to the electrical resistance of the wall bushing, and obtain the third influence function of the electrical resistance of the resistant material relative to the conductivity of the wall bushing.

[0094] Based on the actual usage environment of the through-wall bushing, the upper limit of the thickness of at least one mechanical protection structure and the upper limit of the volume of the electrical resistance structure are obtained.

[0095] Under the constraints of upper limits on volume and upper limits on conductivity, at least one structural parameter scheme is obtained. The structural parameter scheme is composed of the thickness of the mechanical protection structure and the proportion of the electrical resistant material.

[0096] Calculate the conductivity of the structural parameter schemes and select the structural parameter scheme with the smallest conductivity as the target structural parameter scheme;

[0097] The parameters in the target structural parameter scheme are used as the actual structural parameters of the through-wall sleeve.

[0098] In this solution, due to limitations imposed by the actual operating environment, the size of the wall bushing is restricted, resulting in limited withstand capability. Furthermore, parameter adjustments are limited to a finite range. Since the wall bushing is designed to pass through a wall, its size cannot be infinitely large; its outer radius has a maximum limit. As the wall bushing is hollow, its inner radius is determined by the protected cable, meaning it cannot be infinitely small. Therefore, parameter adjustments are necessary under these constraints. The solution comprises two structures: a mechanical protection structure and a dielectric withstand structure. The mechanical protection structure provides insulation and may have multiple layers. The dielectric withstand structure is made of a mixture of dielectric materials and may not be insulating, potentially affecting the insulation of the wall bushing. Therefore, both insulation and dielectric withstand properties of the dielectric withstand structure must be ensured simultaneously. This solution achieves insulation control by limiting conductivity and also considers the impact of external factors penetrating the mechanical protection structure on the dielectric withstand structure's losses.

[0099] Reference Figure 2 As shown, the process of extracting features from the actual usage environment of wall bushings to obtain at least one electrical resistance feature includes the following steps:

[0100] Feature extraction is performed on the actual usage environment of the wall bushing to obtain at least one environmental influencing factor;

[0101] Based on big data, the average values ​​of environmental impact factors are obtained, and the values ​​that differ from the average values ​​of environmental impact factors by more than a preset gap are summarized to form the characteristic range of environmental impact factors.

[0102] At least one identification point is selected evenly within the characteristic range of environmental impact factors;

[0103] Under the condition that the values ​​of environmental impact factors are equal to the values ​​at the identification points, the actual service life of the wall sleeve is obtained;

[0104] The average actual service life of the wall bushing is obtained by taking the average value of the actual service life.

[0105] When the difference between the actual average service life and the average service life is greater than the preset value, environmental factors will be used as the characteristic of electrical resistance.

[0106] Many factors in the environment can affect the electrical conductivity of wall bushings, but not all of them will affect the electrical conductivity of wall bushings. Therefore, screening is required to obtain the electrical conductivity influence characteristics, which are then used for subsequent testing.

[0107] Reference Figure 3 As shown, obtaining the material composition of the electrically resistant structure and acquiring at least one electrically resistant material includes the following steps:

[0108] Based on big data, identify at least one consumable used in the production of through-wall sleeves;

[0109] Obtain the light absorption parameters of the consumables under spectral analysis, using infrared spectroscopy;

[0110] For the electrically resistant structure, the sample is crushed into powder and centrifuged to separate at least one component of the material to be tested;

[0111] Spectral analysis of the composition of the material to be tested is performed to obtain the actual light absorption parameters;

[0112] The consumable material corresponding to the light absorption parameters that are consistent with the actual light absorption parameters is used as the electrical resistance material.

[0113] Since the electrical-resistant structure is composed of multiple materials, it is crushed for identification. Each particle can then be approximated as containing only a single consumable material, allowing for analysis to reveal at least one electrical-resistant material.

[0114] Reference Figure 4 As shown, obtaining the first influence function of the mechanical protective structure relative to the electrical resistance material loss includes the following steps:

[0115] Based on historical data, obtain the structural thickness range of the mechanical protection structure, and uniformly take at least one sampling point within the structural thickness range;

[0116] Under the condition that the thickness of the mechanical protective structure is the value at the sampling point, the conditional service life of the through-wall sleeve is obtained;

[0117] The first impact ratio is obtained by comparing the conditional service life with the average service life.

[0118] By pairing and fitting the sampling points with the first influence ratio, the first influence function is obtained, where the values ​​at the sampling points are independent variables and the first influence ratio is the dependent variable.

[0119] Different mechanical protective structures result in different losses of the electrical-resistant material. The loss is estimated by comparing the conditional service life with the average service life. Since the greater the loss, the shorter the service life, the first influence function can estimate the impact of the mechanical protective structure on the electrical-resistant material after loss.

[0120] Reference Figure 5 As shown, obtaining the second influence function of the electrical resistance of the ductile material relative to the electrical resistance of the wall bushing includes the following steps:

[0121] Take the interval (0, 1) as the feature interval, and uniformly take at least one sampling point in the feature interval;

[0122] A dielectric withstand test structure is generated, and the proportion of dielectric withstand material used in the dielectric withstand test structure is equal to the value at the sampling point. The remaining part of the dielectric withstand test structure uses the sample insulation material.

[0123] Obtain the first service life of the through-wall bushing using the electrical resistance test structure;

[0124] The second impact ratio is obtained by comparing the first service life with the average service life.

[0125] By pairing and fitting the sampling points with the second influence ratio, the second influence function is obtained, where the values ​​at the sampling points are independent variables and the second influence ratio is the dependent variable.

[0126] The purpose of setting up the withstand voltage test structure is to control variables, that is, to eliminate factors that may cause interference. Similarly, the withstand voltage is evaluated by comparing the first service life with the average service life. Since the withstand voltage is low, the service life will be correspondingly low. Therefore, the two are proportional. Thus, the withstand voltage can be estimated by the second influence ratio, and from this, the second influence function is obtained.

[0127] Reference Figure 6 As shown, obtaining the third influence function of the electrical resistance material relative to the conductivity of the through-wall bushing includes the following steps:

[0128] Based on big data, the average conductivity of the wall bushing is obtained;

[0129] Obtain the conductivity test values ​​of the through-wall bushing using the electrical withstand test structure;

[0130] The conductivity test value is compared with the average conductivity value to obtain the third influence ratio;

[0131] By pairing and fitting the sampling points with the third influence ratio, the third influence function is obtained, where the values ​​at the sampling points are independent variables and the third influence ratio is the dependent variable.

[0132] The conductivity test value reflects the conductivity of the wall bushing. Therefore, the third influence ratio obtained by comparing the conductivity test value with the average conductivity value can also be used to evaluate the conductivity. Thus, the third influence function can be used to characterize the conductivity of the resistant material relative to the wall bushing.

[0133] Reference Figure 7 As shown, obtaining the upper limit of the thickness of at least one mechanical protective structure includes the following steps:

[0134] Based on the limitations of the actual usage environment, the maximum volume and maximum radius of the wall bushing are obtained, and the characteristic radius of the cable protected by the wall bushing is obtained, where the maximum radius is the outer ring radius of the wall bushing.

[0135] Based on big data, obtain the first volume percentage of at least one mechanical protection structure and the second volume percentage of the electrical resistance structure in the wall bushing.

[0136] Multiply the maximum volume by the proportion of the first volume to get the first volume; multiply the maximum volume by the proportion of the second volume to get the second volume.

[0137] The third volume is calculated using the area ratio formula;

[0138] The second volume is added to the third volume to obtain the fourth volume;

[0139] Based on the fourth volume and the maximum volume, the radius limit value of the electrical-resistant structure is calculated, where the radius limit value is the radius of the outer ring of the electrical-resistant structure;

[0140] Subtracting the radius limit from the maximum radius yields the upper limit of thickness, which is the upper limit of the total thickness of all mechanical protective structures.

[0141] The formula for the area ratio is as follows:

[0142]

[0143] Where V is the third volume, r is the characteristic radius, R is the maximum radius, and M is the maximum volume.

[0144] The through-wall bushing consists of a hollow section, at least one mechanical protective structure, and an electrical-resistant structure. Both the mechanical protective structure and the electrical-resistant structure have circular cross-sections, while the hollow section has a circular cross-section. At least one mechanical protective structure encloses the electrical-resistant structure, which in turn encloses the hollow section. Therefore, based on geometric relationships, the upper limit of the thickness of at least one mechanical protective structure can be easily calculated. Here, the volume of the hollow section is the third volume. Since the length of the hollow section is the same as the length of the through-wall bushing, the ratio of the volume of the hollow section to the volume of the through-wall bushing is the ratio of the cross-sectional area of ​​the hollow section to the cross-sectional area of ​​the through-wall bushing. Since the radii are known, the cross-sectional areas can be calculated, thus obtaining the volume of the hollow section. This is the origin of the area ratio formula.

[0145] Similarly, the sum of the volumes of the electrical-resistant structure and the hollow part is the fourth volume, and the sum of the volumes of the through-wall bushing and the hollow part is the fifth volume. Since the lengths are equal, the ratio of the fourth volume to the fifth volume is equal to the sum of the cross-sectional areas of the electrical-resistant structure and the hollow part divided by the sum of the cross-sectional areas of the through-wall bushing and the hollow part. According to the formula for the area of ​​a circle, the ratio of the fourth volume to the fifth volume is equal to the square of the radius limit divided by the square of the maximum radius. Thus, the radius limit can be calculated.

[0146] Obtaining the upper limit of the volume of the electrically resistant structure includes the following steps:

[0147] The second volume is used as the upper limit of the volume of the electrical-resistant structure.

[0148] Reference Figure 8 As shown, under the constraints of upper limits on volume and upper limits on conductivity, obtaining at least one structural parameter scheme includes the following steps:

[0149] Generate at least one characteristic thickness of the mechanical protective structure, respectively , ..., satisfied , , ..., All are integer multiples of c, where c is the first adjustment precision, e is the upper limit of thickness, and n is the total number of at least one mechanical protective structure.

[0150] The characteristic proportions of generating at least one electrically resistant material are respectively , ..., satisfied , , ..., All are integer multiples of d, where d is the second control precision and m is the total number of at least one electrically resistant material;

[0151] The characteristic thickness of at least one mechanical protective structure constitutes a group of characteristic thicknesses;

[0152] At least one electrical-resistant material has a characteristic proportion, which constitutes a characteristic proportion group;

[0153] Randomly combine feature thickness groups and feature percentage groups to form at least one preliminary parameter scheme;

[0154] Use the dielectric constant formula to calculate the dielectric constant of the pre-parameter scheme, and use the conductivity formula to calculate the conductivity of the pre-parameter scheme.

[0155] Select a preliminary parameter scheme with a conductivity coefficient less than the upper limit of the conductivity coefficient as an alternative parameter scheme;

[0156] The alternative parameter scheme with an electrical resistance coefficient greater than the electrical resistance critical value is selected as the structural parameter scheme. The electrical resistance critical value is obtained based on big data and is the average value of the qualified through-wall bushing calculated based on the electrical resistance formula.

[0157] The formula for withstand voltage is as follows:

[0158]

[0159] Where A is the dielectric constant, and i and j are subscripts. The first influence function, This is the second influence function;

[0160] The conductivity formula is as follows:

[0161]

[0162] Where B is the conductivity coefficient. This is the third influence function.

[0163] There are many sets of characteristic thicknesses for at least one mechanical protective structure that meet the set conditions, so at least one set of characteristic thicknesses can be formed, and similarly at least one set of characteristic proportions can be formed. The two can be combined to form at least one preliminary parameter scheme.

[0164] The electrical resistance coefficient and conductivity coefficient are not only affected by the ratio of electrical resistance materials, but also need to take into account the loss effect of external factors of the mechanical penetration protection structure. Therefore, it is necessary to multiply the loss result with the influence of the ratio of electrical resistance materials to obtain a more reasonable result.

[0165] In fact f( ) is the first influence function. for The substitution positions are similar for the second and third influence functions.

[0166] The calculation of the conductivity of the structural parameter scheme includes the following steps:

[0167] The conductivity coefficient of the preliminary parameter scheme, which has the same parameters as the structural parameter scheme, is used as the conductivity coefficient of the structural parameter scheme.

[0168] Furthermore, this solution also proposes a storage medium on which a computer-readable program is stored. When the computer-readable program is invoked, the above-mentioned method for adjusting and optimizing structural parameters to improve the electrical withstand performance of through-wall bushings is executed.

[0169] It is understandable that the storage medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid-state drive (SSD).

[0170] In summary, the advantages of this invention are as follows: By comprehensively optimizing the mechanical protection structure and the electrical resistance structure, the optimized through-wall bushing can be ensured to have sufficient electrical resistance performance, preventing fatigue damage due to long-term operation in a high-voltage environment, thus enabling long-term operation. Simultaneously, the insulation performance of the optimized through-wall bushing is guaranteed, avoiding leakage. Furthermore, during optimization, the limitations of complex environments and the impact of external factors such as moisture and humidity on the electrical resistance structure's wear are considered, ensuring that the optimized electrical resistance structure maintains sufficient electrical resistance performance within its average service life even under external influences, thereby meeting practical application requirements.

[0171] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A method for adjusting and optimizing structural parameters to improve the electrical withstand performance of through-wall bushings, characterized in that, include: Based on big data, the average service life of the wall bushing is obtained, and the upper limit of the conductivity coefficient of the wall bushing is obtained. Feature extraction is performed on the actual usage environment of the wall bushing to obtain at least one electrical resistance influence feature; Obtain at least one mechanical protection structure in the wall bushing, and obtain the electrical resistance structure in the wall bushing structure, wherein the mechanical protection structure is an insulating material and the cross-section of the mechanical protection structure is a circular ring; Obtain the material composition of the electrically resistant structure to obtain at least one electrically resistant material, and the cross-section of the electrically resistant structure is a circular ring; Under the condition that the time for at least one electrical resistance feature to penetrate the mechanical protective structure is equal to the average service life, obtain the first influence function of the mechanical protective structure relative to the loss of the electrical resistance material. Obtain the second influence function of the electrical resistance of the resistant material relative to the electrical resistance of the wall bushing, and obtain the third influence function of the electrical resistance of the resistant material relative to the conductivity of the wall bushing. Based on the actual usage environment of the through-wall bushing, the upper limit of the thickness of at least one mechanical protection structure and the upper limit of the volume of the electrical resistance structure are obtained. Under the constraints of upper limits on volume and upper limits on conductivity, at least one structural parameter scheme is obtained. The structural parameter scheme is composed of the thickness of the mechanical protection structure and the proportion of the electrical resistant material. Calculate the conductivity of the structural parameter schemes and select the structural parameter scheme with the smallest conductivity as the target structural parameter scheme; Use the parameters in the target structural parameter scheme as the actual structural parameters of the through-wall sleeve; The process of obtaining at least one structural parameter scheme under the constraints of upper limits on volume and upper limits on conductivity includes the following steps: Generate at least one characteristic thickness of the mechanical protective structure, respectively , ..., satisfied , , ..., All are integer multiples of c, where c is the first adjustment precision, e is the upper limit of thickness, and n is the total number of at least one mechanical protective structure. The characteristic proportions of generating at least one electrically resistant material are respectively , ..., satisfied , , ..., All are integer multiples of d, where d is the second control precision and m is the total number of at least one electrically resistant material; The characteristic thickness of at least one mechanical protective structure constitutes a group of characteristic thicknesses; At least one electrical-resistant material has a characteristic proportion, which constitutes a characteristic proportion group; Randomly combine feature thickness groups and feature percentage groups to form at least one preliminary parameter scheme; Use the dielectric constant formula to calculate the dielectric constant of the pre-parameter scheme, and use the conductivity formula to calculate the conductivity of the pre-parameter scheme. Select a preliminary parameter scheme with a conductivity coefficient less than the upper limit of the conductivity coefficient as an alternative parameter scheme; The alternative parameter scheme with an electrical resistance coefficient greater than the electrical resistance critical value is selected as the structural parameter scheme. The electrical resistance critical value is obtained based on big data and is the average value of the qualified through-wall bushing calculated based on the electrical resistance formula.

2. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 1, characterized in that, The process of extracting features from the actual usage environment of the wall bushing to obtain at least one electrical resistance feature includes the following steps: Feature extraction is performed on the actual usage environment of the wall bushing to obtain at least one environmental influencing factor; Based on big data, the average values ​​of environmental impact factors are obtained, and the values ​​that differ from the average values ​​of environmental impact factors by more than a preset gap are summarized to form the characteristic range of environmental impact factors. At least one identification point is selected evenly within the characteristic range of environmental impact factors; Under the condition that the values ​​of environmental impact factors are equal to the values ​​at the identification points, the actual service life of the wall sleeve is obtained; The average actual service life of the wall bushing is obtained by taking the average value of the actual service life. When the difference between the actual average service life and the average service life is greater than the preset value, environmental factors will be used as the characteristic of electrical resistance.

3. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 2, characterized in that, The process of obtaining a material composition for a electrically resistant structure, and obtaining at least one electrically resistant material, includes the following steps: Based on big data, identify at least one consumable used in the production of through-wall sleeves; Obtain the light absorption parameters of the consumables under spectral analysis, using infrared spectroscopy; For the electrically resistant structure, the sample is crushed into powder and centrifuged to separate at least one component of the material to be tested; Spectral analysis of the composition of the material to be tested is performed to obtain the actual light absorption parameters; The consumable material corresponding to the light absorption parameters that are consistent with the actual light absorption parameters is used as the electrical resistance material.

4. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 3, characterized in that, The process of obtaining the first influence function of the loss of the mechanical protective structure relative to the electrical resistant material includes the following steps: Based on historical data, obtain the structural thickness range of the mechanical protection structure, and uniformly take at least one sampling point within the structural thickness range; Under the condition that the thickness of the mechanical protective structure is the value at the sampling point, the conditional service life of the through-wall sleeve is obtained; The first impact ratio is obtained by comparing the conditional service life with the average service life. By pairing and fitting the sampling points with the first influence ratio, the first influence function is obtained, where the values ​​at the sampling points are independent variables and the first influence ratio is the dependent variable.

5. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 4, characterized in that, The second influence function of obtaining the electrical resistance of the resistant material relative to the through-wall bushing includes the following steps: Take the interval (0, 1) as the feature interval, and uniformly take at least one sampling point in the feature interval; A dielectric withstand test structure is generated, and the proportion of dielectric withstand material used in the dielectric withstand test structure is equal to the value at the sampling point. The remaining part of the dielectric withstand test structure uses the sample insulation material. Obtain the first service life of the through-wall bushing using the electrical resistance test structure; The second impact ratio is obtained by comparing the first service life with the average service life. By pairing and fitting the sampling points with the second influence ratio, the second influence function is obtained, where the values ​​at the sampling points are independent variables and the second influence ratio is the dependent variable.

6. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 5, characterized in that, The third influence function for obtaining the electrical resistance material relative to the conductivity of the through-wall bushing includes the following steps: Based on big data, the average conductivity of the wall bushing is obtained; Obtain the conductivity test values ​​of the through-wall bushing using the electrical withstand test structure; The conductivity test value is compared with the average conductivity value to obtain the third influence ratio; By pairing and fitting the sampling points with the third influence ratio, the third influence function is obtained, where the values ​​at the sampling points are independent variables and the third influence ratio is the dependent variable.

7. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 6, characterized in that, Obtaining the upper limit of the thickness of at least one mechanical protective structure includes the following steps: Based on the limitations of the actual usage environment, the maximum volume and maximum radius of the wall bushing are obtained, and the characteristic radius of the cable protected by the wall bushing is obtained, where the maximum radius is the outer ring radius of the wall bushing. Based on big data, obtain the first volume percentage of at least one mechanical protection structure and the second volume percentage of the electrical resistance structure in the wall bushing. Multiply the maximum volume by the proportion of the first volume to get the first volume; multiply the maximum volume by the proportion of the second volume to get the second volume. The third volume is calculated using the area ratio formula; The second volume is added to the third volume to obtain the fourth volume; Based on the fourth volume and the maximum volume, the radius limit value of the electrical-resistant structure is calculated, where the radius limit value is the radius of the outer ring of the electrical-resistant structure; Subtracting the radius limit from the maximum radius yields the upper limit of thickness, which is the upper limit of the total thickness of all mechanical protective structures. The formula for the area ratio is as follows: Where V is the third volume, r is the characteristic radius, R is the maximum radius, and M is the maximum volume.

8. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 7, characterized in that, The upper limit of the volume of the electrically resistant structure is obtained by the following steps: The second volume is used as the upper limit of the volume of the electrical-resistant structure.

9. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 8, characterized in that, The formula for electrical resistance is as follows: Where A is the dielectric constant, and i and j are subscripts. The first influence function, This is the second influence function; The conductivity formula is as follows: Where B is the conductivity coefficient. This is the third influence function.

10. The method for adjusting and optimizing structural parameters to improve the electrical resistance of through-wall bushings according to claim 9, characterized in that, The calculation of the conductivity coefficient of the structural parameters includes the following steps: The conductivity coefficient of the preliminary parameter scheme, which has the same parameters as the structural parameter scheme, is used as the conductivity coefficient of the structural parameter scheme.

Images