Structural parameter regulation and control optimization method for improving electrical resistance of wall bushing

Abstract

The invention discloses a structure parameter regulation and control optimization method for improving the electrical resistance of a wall bushing, and relates to the technical field of power transmission insulation equipment. Obtaining at least one electricity-resistant material; obtaining a first influence function of the mechanical protection structure relative to the loss of the electricity-resistant material; acquiring a second influence function of the electricity-resistant material relative to the electricity resistance of the wall bushing, and acquiring a third influence function of the electricity-resistant material relative to the conductivity of the wall bushing; obtaining a thickness upper limit of the at least one mechanical protection structure, and obtaining a volume upper limit of the electricity-resistant structure; obtaining at least one structure parameter scheme; selecting the structure parameter scheme with the minimum conductivity coefficient as a target structure parameter scheme; and using parameters in the target structure parameter scheme as actual structure parameters of the wall bushing. Through comprehensive optimization of the mechanical protection structure and the electricity-resistant structure, it is guaranteed that the electricity-resistant structure has enough electricity-resistant performance and insulativity within the average service life.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission insulation equipment, and in particular to a structural parameter regulation and optimization method for improving the electrical resistance performance of a wall bushing. Background Art

[0002] Wall bushings play a vital role in electrical installations. When wires or cables need to pass through walls, without proper protection, the wires may be damaged by friction, or even cause safety hazards such as fire. Wall bushings can effectively protect wires from wear and tear on the wall, while also preventing the wall from being damaged by the wires.

[0003] Since the wall bushing is in direct contact with the wires, it needs to have good electrical resistance. The existing optimization methods are relatively simple and do not take into account the complex environmental constraints faced by the wall bushing, resulting in the optimized structure being unable to meet actual needs. Summary of the invention

[0004] In order to solve the above technical problems, a structural parameter control and optimization method for improving the electrical resistance performance of wall bushing is provided. This technical solution solves the problem that the existing optimization method proposed in the above background technology is relatively single and does not take into account the complex environmental constraints faced by the wall bushing, resulting in the optimized structure being unable to meet actual needs.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

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

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

[0008] Extracting features of the actual use environment of the wall bushing to obtain at least one electrical impact resistance feature;

[0009] Acquire at least one mechanical protection structure in the wall bushing, and acquire an electrical-resistant 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;

[0010] Obtaining a material composition of an electric-resistant structure to obtain at least one electric-resistant material, wherein the cross-section of the electric-resistant structure is a circular ring;

[0011] Under the condition that the time for at least one electrical-impact-resistant characteristic to penetrate the mechanical protective structure is the average service life, obtaining a first influence function of the mechanical protective structure relative to the loss of the electrical-impact-resistant material;

[0012] Obtain a second influence function of the electric-resistant material relative to the electric resistance of the wall bushing, and obtain a third influence function of the electric-resistant material relative to the conductivity of the wall bushing;

[0013] Based on the actual use environment of the wall bushing, an upper limit of the thickness of at least one mechanical protection structure and an upper limit of the volume of the electrical resistance structure are obtained;

[0014] Under the constraints of the upper limit of volume and the upper limit of conductivity coefficient, at least one structural parameter scheme is obtained, and the structural parameter scheme is composed of the proportion of mechanical protection structure and the proportion of electrical resistant material;

[0015] Calculate the conductivity coefficient of the structural parameter scheme, and select the structural parameter scheme with the smallest conductivity coefficient as the target structural parameter scheme;

[0016] The parameters in the target structural parameter solution are used as the actual structural parameters of the wall bushing.

[0017] Preferably, extracting features from the actual use environment of the wall bushing to obtain at least one electrical impact resistance feature comprises the following steps:

[0018] Extract features of the actual use environment of the wall bushing to obtain at least one environmental influencing factor;

[0019] Based on big data, the average value of environmental influencing factors is obtained, and the values ​​whose difference from the average value of environmental influencing factors is greater than the preset difference are aggregated to form the characteristic range of environmental influencing factors;

[0020] Uniformly select at least one identification point in the characteristic range of the environmental influencing factor;

[0021] Under the condition that the value of the environmental influencing factor is equal to the value at the identification point, the actual service life of the wall bushing is obtained;

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

[0023] When the difference between the actual mean service life and the average service life is greater than the preset value, the environmental impact factor is used as the electrical resistance impact characteristic.

[0024] Preferably, the step of obtaining the material composition of the electric-resistant structure to obtain at least one electric-resistant material comprises the following steps:

[0025] Based on the big data, at least one consumable used for producing the wall bushing is obtained;

[0026] Obtain light absorption parameters of the consumables under spectral analysis, where the spectral analysis uses infrared spectroscopy;

[0027] Sampling the electrical-resistant structure, crushing the sample into powder and centrifuging it to separate at least one material component to be tested;

[0028] Perform spectral analysis on the components of the material to be tested to obtain the actual parameters of light absorption;

[0029] The consumables corresponding to the light absorption parameters consistent with the actual light absorption parameters are used as electrical-resistant materials.

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

[0031] Based on historical data, a structural thickness range of the mechanical protection structure is obtained, and at least one sampling point is uniformly selected in the structural thickness range;

[0032] Under the condition that the thickness of the mechanical protection structure is the value at the sampling point, the conditional service life of the wall bushing is obtained;

[0033] Compare the conditional service life with the average service life to obtain the first impact ratio;

[0034] The sampling points are paired and fitted with the first influence ratio to obtain the first influence function, wherein the value at the sampling point is the independent variable and the first influence ratio is the dependent variable.

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

[0036] Take the interval (0, 1) as the characteristic interval and evenly select at least one sampling point in the characteristic interval;

[0037] Generate an electric resistance test structure, the proportion of electric resistance material used in the electric resistance test structure is equal to the value at the sampling point, and the remaining part of the electric resistance test structure uses the sample insulation material;

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

[0039] The first service life is compared with the average service life to obtain the second impact ratio;

[0040] The sampling points are paired and fitted with the second influence ratio to obtain a second influence function, wherein the value at the sampling point is the independent variable and the second influence ratio is the dependent variable.

[0041] Preferably, obtaining the third influence function of the electrical conductivity of the electric resistant material relative to the wall bushing comprises the following steps:

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

[0043] Obtain the conductivity test value of the wall bushing using the electrical resistance test structure;

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

[0045] The sampling points are paired and fitted with the third influence ratio to obtain the third influence function, wherein the value at the sampling point is the independent variable and the third influence ratio is the dependent variable.

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

[0047] Based on the limitations of the actual use 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, wherein the maximum radius is the outer ring radius of the wall bushing;

[0048] Based on the big data, a first proportion of at least one mechanical protection structure and a second proportion of an electrical resistance structure in the wall bushing are obtained;

[0049] The maximum volume is multiplied by the first proportion to obtain the first volume, and the maximum volume is multiplied by the second proportion to obtain the second volume;

[0050] Using the area ratio formula, calculate the third volume;

[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, a radius limit value of the electric-resistant structure is calculated, wherein the radius limit value is the radius of the outer ring of the electric-resistant structure;

[0053] The maximum radius minus the radius limit value is used to obtain the upper limit of thickness, which is the upper limit of the total thickness of all mechanical protection structures;

[0054] The area ratio formula is as follows:

[0055]

[0056] Among them, 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 electrical resistant structure comprises the following steps:

[0058] The second volume is taken 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 the upper limit of volume and the upper limit of conductivity coefficient comprises the following steps:

[0060] Generate at least one characteristic thickness of the mechanical protection structure, respectively a 1 , …, a n, satisfied with a 1 +…+a n =e,a 1 , …, a n-1 are all integer multiples of c, c is the first control accuracy, e is the upper limit of thickness, and n is the total number of at least one mechanical protection structure;

[0061] Generate at least one characteristic proportion of electrical resistant materials, respectively b 1 , …, b m , satisfied with b 1 +…+b m =1, b 1 , …, b m-1 are all integer multiples of d, d is the second control precision, and m is the total number of at least one electrical-resistant material;

[0062] a characteristic thickness of at least one mechanical protection structure, constituting a characteristic thickness group;

[0063] The characteristic proportion of at least one electrical-resistant material constitutes a characteristic proportion group;

[0064] Randomly combining the characteristic thickness group and the characteristic proportion group to form at least one preliminary parameter scheme;

[0065] Use the electrical resistance formula to calculate the electrical resistance coefficient of the preliminary parameter solution, and use the electrical conductivity formula to calculate the electrical conductivity of the preliminary parameter solution;

[0066] Selecting a preliminary parameter scheme whose conductivity is less than the upper limit value of the conductivity as an alternative parameter scheme;

[0067] Select an alternative parameter scheme with an electric resistance coefficient greater than a critical value of electric resistance as a structural parameter scheme, wherein the critical value of electric resistance is obtained based on big data and is the average value of values ​​calculated based on the electric resistance formula for qualified wall bushings;

[0068] The electrical resistance formula is as follows:

[0069]

[0070] Among them, A is the dielectric strength coefficient, i and j are subscripts, f(a i ) is the first influence function, g(b j ) is the second impact ratio;

[0071] The conductivity formula is as follows:

[0072]

[0073] Where B is the conductivity, h(b j ) is the third influence function.

[0074] Preferably, the conductivity coefficient of the calculation structure parameter scheme comprises the following steps:

[0075] The conductivity coefficient of the preliminary parameter scheme with 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 present invention has the following beneficial effects:

[0077] By comprehensively optimizing the mechanical protection structure and the electrical-resistant structure, it can be ensured that the electrical-resistant performance of the optimized wall bushing is sufficient, and it will not be damaged by fatigue due to long-term operation in a high-voltage environment, and can thus operate for a long time. At the same time, the insulation performance of the optimized wall bushing is guaranteed to avoid leakage. In addition, during the optimization, the constraints of the complex environment and the influence of factors such as water vapor and humidity in the external environment on the loss of the electrical-resistant structure are taken into consideration to ensure that the optimized electrical-resistant structure can still guarantee sufficient electrical resistance within the average service life when affected by the outside world, thereby meeting actual usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 A schematic flow chart of a structural parameter control optimization method for improving the electrical resistance performance of a wall bushing according to the present invention;

[0079] Figure 2 A schematic diagram of a process of extracting features from the actual use environment of the wall bushing according to the present invention to obtain at least one electrical impact resistance feature;

[0080] Figure 3 A schematic diagram of a process for obtaining a material composition of an electric-resistant structure and obtaining at least one electric-resistant material according to the present invention;

[0081] Figure 4 A schematic diagram of a process of obtaining a first influence function of the loss of a mechanical protection structure relative to an electrical-resistant material according to the present invention;

[0082] Figure 5 A schematic diagram of a process for obtaining a second influence function of an electrical resistance material relative to the electrical resistance of a wall bushing according to the present invention;

[0083] Figure 6 A schematic diagram of a process for obtaining a third influence function of the electrical conductivity of an electric-resistant material relative to a wall bushing according to the present invention;

[0084] Figure 7 A schematic diagram of a process for obtaining an upper limit of the thickness of at least one mechanical protection structure according to the present invention;

[0085] Figure 8 The present invention is a flow chart of obtaining at least one structural parameter scheme under the constraints of the upper limit of volume and the upper limit of conductivity. DETAILED DESCRIPTION

[0086] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0087] Reference Figure 1 As shown, a structural parameter control optimization method for improving the electrical resistance performance of a wall bushing includes:

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

[0089] Extracting features of the actual use environment of the wall bushing to obtain at least one electrical impact resistance feature;

[0090] Acquire at least one mechanical protection structure in the wall bushing, and acquire an electrical-resistant 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] Obtaining a material composition of an electric-resistant structure to obtain at least one electric-resistant material, wherein the cross-section of the electric-resistant structure is a circular ring;

[0092] Under the condition that the time for at least one electrical-impact-resistant characteristic to penetrate the mechanical protective structure is the average service life, obtaining a first influence function of the mechanical protective structure relative to the loss of the electrical-impact-resistant material;

[0093] Obtain a second influence function of the electric-resistant material relative to the electric resistance of the wall bushing, and obtain a third influence function of the electric-resistant material relative to the conductivity of the wall bushing;

[0094] Based on the actual use environment of the wall bushing, an upper limit of the thickness of at least one mechanical protection structure and an upper limit of the volume of the electrical resistance structure are obtained;

[0095] Under the constraints of the upper limit of volume and the upper limit of conductivity coefficient, at least one structural parameter scheme is obtained, and the structural parameter scheme is composed of the proportion of mechanical protection structure and the proportion of electrical resistant material;

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

[0097] The parameters in the target structural parameter solution are used as the actual structural parameters of the wall bushing.

[0098] In this scheme, due to the limitations of the actual use environment, the size of the wall bushing will be limited, which will lead to its limited resistance to points. At the same time, when adjusting the parameters, it can only be adjusted within a limited range. Since the wall bushing is set to penetrate the wall, it cannot be infinitely large, and its outer ring radius will have a limit value, that is, the maximum radius. The wall bushing is hollow, and its inner ring radius is determined by the protected cable. Therefore, its inner ring cannot be infinitely small. Therefore, it is necessary to adjust the parameters under such restrictions. It is divided into two structures, namely mechanical protection structure and electrical resistance structure. The mechanical protection structure plays an insulating role and may have multiple layers, so there are multiple electrical resistance structures. The electrical resistance structure is made of a mixture of electrical resistance materials, so it may not be insulated, so it may affect the insulation of the wall bushing. Therefore, it is necessary to ensure the insulation and electrical resistance of the electrical resistance structure at the same time. In this scheme, the purpose of insulation control is achieved by limiting the conductivity, and the influence of external factors penetrating the mechanical protection structure on the loss of the electrical resistance structure is also considered.

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

[0100] Extract features of the actual use environment of the wall bushing to obtain at least one environmental influencing factor;

[0101] Based on big data, the average value of environmental influencing factors is obtained, and the values ​​whose difference from the average value of environmental influencing factors is greater than the preset difference are aggregated to form the characteristic range of environmental influencing factors;

[0102] Uniformly select at least one identification point in the characteristic range of the environmental influencing factor;

[0103] Under the condition that the value of the environmental influencing factor is equal to the value at the identification point, the actual service life of the wall bushing is obtained;

[0104] Take the average of the actual service life of the wall bushing to obtain the actual average service life;

[0105] When the difference between the actual mean service life and the average service life is greater than the preset value, the environmental impact factor is used as the electrical resistance impact characteristic.

[0106] There are many influencing factors in the environment, but not all of them will affect the electrical resistance performance of the wall bushing. Therefore, screening is required to obtain the electrical resistance impact characteristics, and use the electrical resistance impact characteristics for subsequent testing.

[0107] Reference Figure 3 As shown, obtaining the material composition of the electric-resistant structure and obtaining at least one electric-resistant material comprises the following steps:

[0108] Based on the big data, at least one consumable used for producing the wall bushing is obtained;

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

[0110] Sampling the electrical-resistant structure, crushing the sample into powder and centrifuging it to separate at least one material component to be tested;

[0111] Perform spectral analysis on the components of the material to be tested to obtain the actual parameters of light absorption;

[0112] The consumables corresponding to the light absorption parameters consistent with the actual light absorption parameters are used as electrical-resistant materials.

[0113] Since the electrical-resistant structure is composed of multiple materials, it is crushed for identification purposes, so that each particle can be approximately regarded as containing only a single used consumable material, and thus analysis can be performed to obtain at least one electrical-resistant material.

[0114] Reference Figure 4 As shown, obtaining a first influence function of the loss of the mechanical protection structure relative to the electrical resistant material comprises the following steps:

[0115] Based on historical data, a structural thickness range of the mechanical protection structure is obtained, and at least one sampling point is uniformly selected in the structural thickness range;

[0116] Under the condition that the thickness of the mechanical protection structure is the value at the sampling point, the conditional service life of the wall bushing is obtained;

[0117] Compare the conditional service life with the average service life to obtain the first impact ratio;

[0118] The sampling points are paired and fitted with the first influence ratio to obtain the first influence function, wherein the value at the sampling point is the independent variable and the first influence ratio is the dependent variable.

[0119] Different settings of the mechanical protection structure result in different losses of the electrical-resistant material, which are estimated by comparing the conditional service life with the average service life. Because the greater the loss, the shorter the life, the first impact function can estimate the situation of the mechanical protection structure after the loss of the electrical-resistant material.

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

[0121] Take the interval (0, 1) as the characteristic interval and evenly select at least one sampling point in the characteristic interval;

[0122] Generate an electric resistance test structure, the proportion of electric resistance material used in the electric resistance test structure is equal to the value at the sampling point, and the remaining part of the electric resistance test structure uses the sample insulation material;

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

[0124] The first service life is compared with the average service life to obtain the second impact ratio;

[0125] The sampling points are paired and fitted with the second influence ratio to obtain a second influence function, wherein the value at the sampling point is the independent variable and the second influence ratio is the dependent variable.

[0126] The setting of the electrical resistance test structure is to control variables, that is, to eliminate factors that may cause interference. Similarly, the first service life is compared with the average service life to evaluate the electrical resistance. Because the electrical resistance is low, the service life will be correspondingly lower. Therefore, the two are proportional. Therefore, the second influence ratio can be used to estimate the electrical resistance, and thus, the second influence function is obtained.

[0127] Reference Figure 6 As shown, obtaining the third influence function of the electrical conductivity of the electric-resistant material relative to the 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 value of the wall bushing using the electrical resistance test structure;

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

[0131] The sampling points are paired and fitted with the third influence ratio to obtain the third influence function, wherein the value at the sampling point is the independent variable 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 conductivity average value can also evaluate the conductivity. Therefore, the third influence function can be used to characterize the conductivity of the electrical 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 protection structure comprises the following steps:

[0134] Based on the limitations of the actual use 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, wherein the maximum radius is the outer ring radius of the wall bushing;

[0135] Based on the big data, a first proportion of at least one mechanical protection structure and a second proportion of an electrical resistance structure in the wall bushing are obtained;

[0136] The maximum volume is multiplied by the first proportion to obtain the first volume, and the maximum volume is multiplied by the second proportion to obtain the second volume;

[0137] Using the area ratio formula, calculate the third volume;

[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, a radius limit value of the electric-resistant structure is calculated, wherein the radius limit value is the radius of the outer ring of the electric-resistant structure;

[0140] The maximum radius minus the radius limit value is used to obtain the upper limit of thickness, which is the upper limit of the total thickness of all mechanical protection structures;

[0141] The area ratio formula is as follows:

[0142]

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

[0144] The wall bushing is composed of a hollow part in the middle, at least one mechanical protection structure and an electrical resistance structure. The cross-sections of the mechanical protection structure and the electrical resistance structure are both circular rings, and the cross-section of the hollow part is a circle. At least one mechanical protection structure wraps the electrical resistance structure, and the electrical resistance structure wraps the hollow part. Therefore, according to the geometric relationship, it is easy to find the upper limit of the thickness of at least one mechanical protection structure. Here, the volume of the hollow part is the third volume. Since the length of the hollow part is consistent with the length of the wall bushing, the ratio of the volume of the hollow part to the volume of the wall bushing is the ratio of the cross-sectional area of ​​the hollow part to the cross-sectional area of ​​the wall bushing. Since the radius is known, the cross-sectional area can be calculated. Therefore, the volume of the hollow part is obtained, which is the origin of the area ratio formula.

[0145] Similarly, the superposition value of the volume of the electrical-resistant structure and the hollow part is the fourth volume, and the superposition value of the volume of the wall bushing and the hollow part is recorded as the fifth volume. Since the lengths are equal, the ratio of the fourth volume to the fifth volume is equal to the superposition value of the cross-sectional area of ​​the electrical-resistant structure and the hollow part to the superposition value of the cross-sectional area of ​​the wall bushing and the hollow part. According to the circle area formula, the ratio of the fourth volume to the fifth volume is equal to the ratio of the square of the radius limit value to the square of the maximum radius. Therefore, the radius limit value can be calculated.

[0146] Obtaining the upper limit of the volume of the electrical resistant structure comprises the following steps:

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

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

[0149] Generate at least one characteristic thickness of the mechanical protection structure, respectively a 1 , …, a n , satisfied with a 1 +…+a n =e,a 1 , …, a n-1 are all integer multiples of c, c is the first control accuracy, e is the upper limit of thickness, and n is the total number of at least one mechanical protection structure;

[0150] Generate at least one characteristic proportion of electrical resistant materials, respectively b 1 , …, b m , satisfied with b 1 +…+b m =1, b 1 , …, b m-1 are all integer multiples of d, d is the second control precision, and m is the total number of at least one electrical-resistant material;

[0151] a characteristic thickness of at least one mechanical protection structure, constituting a characteristic thickness group;

[0152] The characteristic proportion of at least one electrical-resistant material constitutes a characteristic proportion group;

[0153] Randomly combining the characteristic thickness group and the characteristic proportion group to form at least one preliminary parameter scheme;

[0154] Use the electrical resistance formula to calculate the electrical resistance coefficient of the preliminary parameter solution, and use the electrical conductivity formula to calculate the electrical conductivity of the preliminary parameter solution;

[0155] Select a preliminary parameter scheme whose conductivity is less than the upper limit value of the conductivity as an alternative parameter scheme;

[0156] Select an alternative parameter scheme with an electric resistance coefficient greater than a critical value of electric resistance as a structural parameter scheme, wherein the critical value of electric resistance is obtained based on big data and is the average value of values ​​calculated based on the electric resistance formula for qualified wall bushings;

[0157] The electrical resistance formula is as follows:

[0158]

[0159] Among them, A is the dielectric strength coefficient, i and j are subscripts, f(a i ) is the first influence function, g(b j) is the second impact ratio;

[0160] The conductivity formula is as follows:

[0161]

[0162] Where B is the conductivity, h(b j ) is the third influence function.

[0163] There are many groups of characteristic thicknesses of at least one mechanical protection structure that meet the set conditions, so at least one group of characteristic thickness groups can be formed, and similarly at least one group of characteristic proportion groups can be formed, and the two can be combined to form at least one preliminary parameter scheme;

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

[0165] In fact, f(*) is the first influence function, * is a i The substitution position is similar for the second influence function and the third influence function.

[0166] Calculating the conductivity coefficient of the structural parameter scheme includes the following steps:

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

[0168] Furthermore, the present solution also proposes a storage medium on which a computer-readable program is stored. When the computer-readable program is called, the above-mentioned structural parameter control and optimization method for improving the electrical resistance performance of the wall bushing is executed.

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

[0170] To sum up, the advantages of the present invention are: through comprehensive optimization of the mechanical protection structure and the electrical-resistant structure, it can ensure that the electrical resistance of the optimized wall bushing is sufficient, and it will not be damaged by fatigue due to long-term operation in a high-voltage environment, and thus can operate for a long time. At the same time, the insulation performance of the optimized wall bushing is guaranteed to avoid leakage. In addition, during the optimization, the constraints of the complex environment and the influence of factors such as water vapor and humidity in the external environment on the loss of the electrical-resistant structure are taken into account to ensure that the optimized electrical-resistant structure can still guarantee sufficient electrical resistance within the average service life when affected by the outside world, thereby meeting actual use requirements.

[0171] The above shows and describes 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 above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing, characterized in that: include: Based on big data, the average service life of the wall bushing and the upper limit of the conductivity coefficient of the wall bushing are obtained; Extracting features of the actual use environment of the wall bushing to obtain at least one electrical impact resistance feature; Acquire at least one mechanical protection structure in the wall bushing, and acquire an electrical-resistant 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; Obtaining a material composition of an electric-resistant structure to obtain at least one electric-resistant material, wherein the cross-section of the electric-resistant structure is a circular ring; Under the condition that the time for at least one electrical-impact-resistant characteristic to penetrate the mechanical protective structure is the average service life, obtaining a first influence function of the mechanical protective structure relative to the loss of the electrical-impact-resistant material; Obtaining a second influence function of the electric-resistant material relative to the electric resistance of the wall bushing, and obtaining a third influence function of the electric-resistant material relative to the conductivity of the wall bushing; Based on the actual use environment of the wall bushing, an upper limit of the thickness of at least one mechanical protection structure and an upper limit of the volume of the electrical resistance structure are obtained; Under the constraints of the upper limit of volume and the upper limit of conductivity coefficient, at least one structural parameter scheme is obtained, and the structural parameter scheme is composed of the proportion of mechanical protection structure and the proportion of electrical resistant material; Calculate the conductivity coefficient of the structural parameter scheme, and select the structural parameter scheme with the smallest conductivity coefficient as the target structural parameter scheme; The parameters in the target structural parameter solution are used as the actual structural parameters of the wall bushing.

2. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 1, characterized in that: The feature extraction of the actual use environment of the wall bushing to obtain at least one electrical impact resistance feature comprises the following steps: Extract features of the actual use environment of the wall bushing to obtain at least one environmental influencing factor; Based on big data, the average value of environmental influencing factors is obtained, and the values ​​whose difference from the average value of environmental influencing factors is greater than the preset difference are aggregated to form the characteristic range of environmental influencing factors; Uniformly select at least one identification point in the characteristic range of the environmental influencing factor; Under the condition that the value of the environmental influencing factor is equal to the value at the identification point, the actual service life of the wall bushing is obtained; Take the average of the actual service life of the wall bushing to obtain the actual average service life; When the difference between the actual mean service life and the average service life is greater than the preset value, the environmental impact factor is used as the electrical resistance impact characteristic.

3. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 2, characterized in that: The obtaining of the material composition of the electric-resistant structure to obtain at least one electric-resistant material comprises the following steps: Based on the big data, at least one consumable used for producing the wall bushing is obtained; Obtain light absorption parameters of the consumables under spectral analysis, where the spectral analysis uses infrared spectroscopy; Sampling the electrical-resistant structure, crushing the sample into powder and centrifuging it to separate at least one material component to be tested; Perform spectral analysis on the components of the material to be tested to obtain the actual parameters of light absorption; The consumables corresponding to the light absorption parameters consistent with the actual light absorption parameters are used as electrical-resistant materials.

4. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 3, characterized in that: The method of obtaining a first influence function of the loss of the mechanical protection structure relative to the electrical resistant material comprises the following steps: Based on historical data, a structural thickness range of the mechanical protection structure is obtained, and at least one sampling point is uniformly selected in the structural thickness range; Under the condition that the thickness of the mechanical protection structure is the value at the sampling point, the conditional service life of the wall bushing is obtained; Compare the conditional service life with the average service life to obtain the first impact ratio; The sampling points are paired and fitted with the first influence ratio to obtain the first influence function, wherein the value at the sampling point is the independent variable and the first influence ratio is the dependent variable.

5. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 4, characterized in that: The method of obtaining the second influence function of the electrical resistance of the electrical resistant material relative to the electrical resistance of the wall bushing comprises the following steps: Take the interval (0, 1) as the characteristic interval and evenly select at least one sampling point in the characteristic interval; Generate an electric resistance test structure, the proportion of electric resistance material used in the electric resistance test structure is equal to the value at the sampling point, and the remaining part of the electric resistance test structure uses the sample insulation material; Obtain the first service life of the wall bushing using the electrical resistance test structure; The first service life is compared with the average service life to obtain the second impact ratio; The sampling points are paired and fitted with the second influence ratio to obtain a second influence function, wherein the value at the sampling point is the independent variable and the second influence ratio is the dependent variable.

6. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 5, characterized in that: The method of obtaining the third influence function of the electrical conductivity of the electric resistant material relative to the wall bushing comprises the following steps: Based on big data, the average conductivity of the wall bushing is obtained; Obtain the conductivity test value of the wall bushing using the electrical resistance test structure; The conductivity test value is compared with the conductivity average value to obtain the third influence ratio; The sampling points are paired and fitted with the third influence ratio to obtain the third influence function, wherein the value at the sampling point is the independent variable and the third influence ratio is the dependent variable.

7. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 6, characterized in that: The step of obtaining the upper limit of the thickness of at least one mechanical protection structure comprises the following steps: Based on the limitations of the actual use 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, wherein the maximum radius is the outer ring radius of the wall bushing; Based on the big data, a first proportion of at least one mechanical protection structure and a second proportion of an electrical resistance structure in the wall bushing are obtained; The maximum volume is multiplied by the first proportion to obtain the first volume, and the maximum volume is multiplied by the second proportion to obtain the second volume; Using the area ratio formula, calculate the third volume; The second volume is added to the third volume to obtain the fourth volume; Based on the fourth volume and the maximum volume, a radius limit value of the electric-resistant structure is calculated, wherein the radius limit value is the radius of the outer ring of the electric-resistant structure; The maximum radius minus the radius limit value is used to obtain the upper limit of thickness, which is the upper limit of the total thickness of all mechanical protection structures; The area ratio formula is as follows: Among them, V is the third volume, r is the characteristic radius, R is the maximum radius, and M is the maximum volume.

8. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 7, characterized in that: The method of obtaining the volume upper limit of the electrical resistant structure comprises the following steps: The second volume is taken as the upper limit of the volume of the electrical-resistant structure.

9. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 8, characterized in that: The step of obtaining at least one structural parameter scheme under the constraints of the upper limit of the volume and the upper limit of the conductivity coefficient comprises the following steps: Generate at least one characteristic thickness of the mechanical protection structure, a1, ..., a n , satisfied with a1+…+a n =e, a1,…,a n-1 are all integer multiples of c, c is the first control accuracy, e is the upper limit of thickness, and n is the total number of at least one mechanical protection structure; Generate at least one characteristic proportion of electrical resistant materials, b1,…,b m , satisfied with b1+…+b m =1,b1,…,b m-1 are all integer multiples of d, d is the second control precision, and m is the total number of at least one electrical-resistant material; a characteristic thickness of at least one mechanical protection structure, constituting a characteristic thickness group; The characteristic proportion of at least one electrical-resistant material constitutes a characteristic proportion group; Randomly combining the characteristic thickness group and the characteristic proportion group to form at least one preliminary parameter scheme; Use the electrical resistance formula to calculate the electrical resistance coefficient of the preliminary parameter solution, and use the electrical conductivity formula to calculate the electrical conductivity of the preliminary parameter solution; Select a preliminary parameter scheme whose conductivity is less than the upper limit value of the conductivity as an alternative parameter scheme; Select an alternative parameter scheme with an electric resistance coefficient greater than a critical value of electric resistance as a structural parameter scheme, wherein the critical value of electric resistance is obtained based on big data and is the average value of values ​​calculated based on the electric resistance formula for qualified wall bushings; The electrical resistance formula is as follows: Among them, A is the dielectric strength coefficient, i and j are subscripts, and f ( a i ) is the first influence function, g ( b j ) is the second impact ratio; The conductivity formula is as follows: Where B is the conductivity, h ( b j ) is the third influence function.

10. A structural parameter control and optimization method for improving the electrical resistance performance of a wall bushing according to claim 9, characterized in that: The conductivity coefficient of the calculation structure parameter scheme includes the following steps: The conductivity coefficient of the preliminary parameter scheme with the same parameters as the structural parameter scheme is used as the conductivity coefficient of the structural parameter scheme.

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