Cable insulativity auxiliary adjusting method and device

Abstract

The invention provides a cable insulativity auxiliary adjustment method and device, and relates to the technical field of electrics.The cable insulativity auxiliary adjustment method comprises the steps that whether conductor shielding field intensity or insulation shielding field intensity obtained based on key parameters of a target cable meets production requirements or not is judged; and if the shielding field intensity does not meet the production requirement, analyzing the limited influence factors to generate a target production adjustment suggestion, feeding the target production adjustment suggestion back to a production department for adjustment, and monitoring the field intensity suggestion adjustment effect. Analyzing the conductor shielding field intensity and the insulation shielding field intensity which are obtained through current calculation to obtain a judgment result whether the shielding field intensity of the current target cable meets the production requirement or not; for the condition that the shielding field intensity does not meet the requirement, the limited influence factors of the conductor shielding field intensity or the insulation shielding field intensity are analyzed to generate corresponding production suggestions, the production suggestions are fed back to a production department for adjustment, the field intensity suggestion adjustment effect is supervised, and accurate adjustment of the insulation and shielding performance of the cable can be achieved to meet the production requirement. And safe and reliable operation of the cable is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and in particular to a cable insulation auxiliary adjustment method and device. Background Art

[0002] Insulation performance is one of the important indicators for evaluating cable quality during the production and operation of cables. The insulation performance of cables not only affects the electrical performance and service life of cables, but is also closely related to the safe operation of cables. Therefore, auxiliary adjustment of cable insulation and improvement of its insulation performance have become an important task in cable production and maintenance. However, the existing insulation performance adjustment technology cannot detect performance abnormalities in a timely manner and accurately adjust the insulation performance of cables.

[0003] Therefore, the present invention provides a cable insulation auxiliary adjustment method and device, which are used to achieve precise control and adjustment of cable insulation performance through calculation and analysis of conductor shielding field strength and insulation shielding field strength. Summary of the invention

[0004] The present invention provides a cable insulation auxiliary adjustment method and device, which are used to obtain a judgment result of whether the shielding field strength of the current target cable meets the production requirements by analyzing the currently calculated conductor shielding field strength and insulation shielding field strength; if the shielding field strength does not meet the requirements, the limited influencing factors of the conductor shielding field strength or the insulation shielding field strength are analyzed to generate corresponding production suggestions and feedback to the production department for adjustment, and the effect of the field strength suggestion adjustment is supervised, so as to realize accurate adjustment of the insulation and shielding performance of the cable to meet the production requirements, and provide guarantee for the safe and reliable operation of the cable.

[0005] The present invention provides a cable insulation auxiliary adjustment method, comprising:

[0006] Step 1: Based on the key parameters of the target cable obtained, determine the conductor shielding field strength and insulation shielding field strength of the target cable;

[0007] Step 2: Analyze the conductor shielding field strength and the insulation shielding field strength, determine whether the current shielding field strength meets the production requirements, and obtain a demand determination result;

[0008] Step 3: According to the demand judgment result, if the shielding field strength does not meet the production demand, the limiting influencing factors are analyzed and target production adjustment suggestions are generated;

[0009] Step 4: Feedback the target production adjustment suggestions to the production department for adjustment implementation, and monitor the effect of the field strength adjustment suggestions.

[0010] Preferably, determining the conductor shielding field strength and the insulation shielding field strength of the target cable based on the acquired key parameters of the target cable includes:

[0011] Collect key parameters of target cables in real time;

[0012] Based on the cable type and specification, the required field strength distribution calculation formula of the target cable is obtained by screening from the field strength distribution calculation list;

[0013] The collected key parameters of the target cable are substituted into the required field strength distribution formula to calculate the conductor shielding field strength and insulation shielding field strength of the target cable.

[0014] Preferably, key parameters of the target cable include rated voltage, inner and outer diameter parameters of the conductor and the insulation layer.

[0015] Preferably, the conductor shielding field strength and the insulation shielding field strength are analyzed to determine whether the current shielding field strength meets the production demand, and obtain the demand determination result, including:

[0016] Extracting and setting the field strength shielding standard from the cable production standard data of the target cable;

[0017] The conductor shielding field strength and the insulation shielding field strength of the target cable are respectively compared with the corresponding set field strength shielding standards, and a first conductor shielding comparison difference and a first insulation shielding comparison difference are obtained in turn;

[0018] Perform deviation correction on the first shielding comparison difference and the second shielding comparison difference to obtain a corrected conductor shielding comparison difference and a corrected insulation shielding comparison difference in turn;

[0019] Comparing the modified conductor shielding comparison difference and the modified insulation shielding comparison difference with the corresponding set shielding field strength difference thresholds respectively;

[0020] If the modified conductor shielding comparison difference is less than the conductor-set shielding field strength difference threshold, it is determined that the current conductor shielding field strength meets the production requirements and is output as a demand judgment result;

[0021] Otherwise, it is determined that the current conductor shielding field strength does not meet the production requirements and is output as a demand judgment result;

[0022] If the modified insulation shielding comparison difference is less than the insulation-set shielding field strength difference threshold, it is determined that the current insulation shielding field strength meets the production requirements and is output as a demand judgment result;

[0023] Otherwise, it is determined that the current insulation shielding field strength does not meet the production requirements and is output as a demand judgment result.

[0024] Preferably, according to the demand judgment result, if there is a shielding field strength that does not meet the production demand, the restricted influencing factors are analyzed and target production adjustment suggestions are generated, including:

[0025] According to the demand judgment result, if the current conductor shielding field strength or insulation shielding field strength does not meet the production demand, all possible influencing factors that the conductor shielding field strength or insulation shielding field strength does not meet the production demand are obtained, and a list of possible influencing factors is constructed;

[0026] Perform anomaly detection on the general influencing factors in the list of possible influencing factors according to the set detection mechanism. If anomalies exist, the current general influencing factors will be regarded as first-level restricted influencing factors.

[0027] Obtaining a preset production adjustment strategy corresponding to the first-level restricted influencing factor as a target production adjustment suggestion output;

[0028] The remaining possible influencing factors in the list of possible influencing factors other than the general influencing factors are regarded as specific factors;

[0029] Extracting historical field strength production adjustment records of all cables of the same type and specification as the target cable from the cable insulation auxiliary adjustment database to establish a first historical adjustment data set;

[0030] Acquire historical field strength production adjustment records under a shielding field strength condition consistent with the current conductor shielding field strength or insulation shielding field strength from the first historical adjustment data set, and establish a second historical adjustment data set;

[0031] Based on the second historical adjustment data set, obtaining the historical occurrence number of each specific factor and the historical field intensity adjustment effect coefficient of the corresponding historical production adjustment strategy;

[0032] Determine the first impact analysis value for each specific factor based on the historical occurrence number and the historical field strength adjustment effect coefficient;

[0033] Specific factors whose first impact analysis values ​​are greater than the set analysis threshold are considered as second-level restricted impact factors;

[0034] The historical production adjustment strategy of the secondary restricted influencing factor is calibrated as an evaluation production adjustment strategy, and a feasibility evaluation is performed to generate a strategy evaluation value;

[0035] The corresponding evaluated production adjustment strategy with a strategy evaluation value greater than the set evaluation threshold is used as a reference production adjustment suggestion;

[0036] Analyze and adjust relevant parameters in the reference production adjustment suggestion to obtain adjusted relevant parameter values;

[0037] The adjusted relevant parameter values ​​are brought into the corresponding reference production adjustment suggestions, and the target production adjustment suggestions are generated and output.

[0038] Preferably, the calculation formula of the strategy evaluation value is as follows:

[0039] Where P i Represented as the strategy evaluation value of the i-th production adjustment strategy; C i It is represented as the adjustment cost of the i-th production adjustment strategy; α is the influence weight of the adjustment cost on the strategic evaluation of the production adjustment strategy; n i1 It is represented by the number of occurrences of the i-th evaluated production adjustment strategy in the first historical adjustment data set; n0 is represented by the total number of evaluated production adjustment strategies; d t It is expressed as the historical field intensity adjustment effect coefficient obtained at time t, which is the closest to the current time, using the i-th evaluated production adjustment strategy for adjustment; It is expressed as the average historical field strength adjustment effect coefficient after adjustment using the i-th evaluation production adjustment strategy; m i0 It is expressed as the number of times the historical field strength adjustment effect coefficient after adjustment using the i-th evaluation production adjustment strategy is greater than the average historical field strength adjustment effect coefficient; m i1 It is expressed as the number of times the adjustment effect coefficient of the historical field strength after adjustment using the i-th evaluation production adjustment strategy is not greater than the average historical field strength adjustment effect coefficient; It is expressed as the jth historical field strength adjustment effect coefficient greater than the average historical field strength adjustment effect coefficient obtained after adjustment using the i-th evaluated production adjustment strategy, where j = 1, 2, 3, ..., m i0 ; It is expressed as the kth historical field strength adjustment effect coefficient that is not greater than the average historical field strength adjustment effect coefficient after adjustment using the i-th evaluated production adjustment strategy, where k = 1, 2, 3, ..., m i1 ; β represents the influence weight of the field strength adjustment effect of the production adjustment strategy on the strategy evaluation; Δt represents the time interval between the current moment and moment t; μ represents the influence factor of the target cable loss on the field strength adjustment effect.

[0040] Preferably, analyzing and adjusting the relevant parameters in the reference production adjustment suggestion to obtain adjusted relevant parameter values ​​includes:

[0041] Obtaining a preset correlation between the reference production adjustment suggestion and the corresponding relevant parameter;

[0042] Extracting all historical field strength adjustment effect coefficients obtained after adjustment using the current reference production adjustment suggestion from the first historical adjustment data set, combining them with the historical parameter values ​​of the corresponding related parameters, and constructing a plurality of parameter-effect curves in time series;

[0043] Extracting the curve characteristics of the parameter-effect curve diagram and performing combined analysis to obtain the parameter-effect variation coefficient;

[0044] The parameter-effect variation coefficient, the preset correlation and the current field intensity adjustment effect requirements are combined for analysis to obtain the target adjustment coefficient of the corresponding relevant parameters;

[0045] Extracting all historical field strength adjustment effect coefficients obtained after adjustment using the current reference production adjustment suggestion from the second historical adjustment data set, combining and analyzing with the historical parameter values ​​of the corresponding relevant parameters, and obtaining an estimated parameter benchmark value of each relevant parameter;

[0046] The target adjustment coefficient is used to adjust the estimated parameter baseline value to obtain the corresponding adjusted related parameter value.

[0047] Preferably, the target production adjustment suggestion is fed back to the production department for adjustment, and the effect of the field strength adjustment suggestion is monitored, including:

[0048] Feedback the target production adjustment suggestions to the production department for implementation, and calculate the adjusted conductor shielding field strength and insulation shielding field strength;

[0049] The adjusted conductor shielding field strength and insulation shielding field strength are respectively compared with the corresponding set field strength shielding standards to obtain adjustment comparison results;

[0050] Based on the comparative analysis of the adjustment comparison result and the set shielding field strength difference threshold, the field strength recommended adjustment effect is obtained;

[0051] When the suggested adjustment effect of the field strength meets the cable insulation adjustment requirement, a field strength adjustment record is generated and stored;

[0052] When the field strength adjustment suggestion effect does not meet the cable insulation adjustment requirement, re-optimize the key parameters in the target production adjustment suggestion to generate an optimized target production adjustment suggestion;

[0053] Use the optimized target production adjustment suggestions to make readjustments until the field strength adjustment effect meets the cable insulation adjustment requirements.

[0054] Compared with the prior art, the beneficial effects of this application are as follows:

[0055] By analyzing the currently calculated conductor shielding field strength and insulation shielding field strength, we can determine whether the shielding field strength of the current target cable meets the production requirements. If the shielding field strength does not meet the requirements, we can analyze the limited influencing factors of the conductor shielding field strength or the insulation shielding field strength to generate corresponding production suggestions and feedback them to the production department for adjustment. In addition, we can supervise the effect of the field strength adjustment suggestions, so as to achieve precise adjustment of the insulation and shielding performance of the cable to meet the production requirements and provide guarantee for the safe and reliable operation of the cable.

[0056] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0057] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0059] Figure 1 The present invention is a flowchart of a cable insulation auxiliary adjustment method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0061] The embodiment of the present invention provides a cable insulation auxiliary adjustment method, such as Figure 1 As shown, including:

[0062] Step 1: Based on the key parameters of the target cable obtained, determine the conductor shielding field strength and insulation shielding field strength of the target cable;

[0063] Step 2: Analyze the conductor shielding field strength and the insulation shielding field strength, determine whether the current shielding field strength meets the production requirements, and obtain a demand determination result;

[0064] Step 3: According to the demand judgment result, if the shielding field strength does not meet the production demand, the limiting influencing factors are analyzed and target production adjustment suggestions are generated;

[0065] Step 4: Feedback the target production adjustment suggestions to the production department for adjustment implementation, and monitor the effect of the field strength adjustment suggestions.

[0066] In this embodiment, the cable is an electrical energy or signal transmission device, and its types are various, including power cables, control cables, compensation cables, shielded cables, ship cables, mining cables, aluminum alloy cables, etc.; key parameters include rated voltage, inner and outer diameter parameters of conductors and insulation layers.

[0067] In this embodiment, the conductor shielding field strength refers to the field strength that the conductor shielding layer (inner shield) of the cable is subjected to under the power frequency voltage, wherein the conductor shielding layer is in close contact with the insulating layer, which can improve the voltage withstand level of the cable; the insulation shielding field strength refers to the electric field strength that the insulation shielding layer (outer shield) of the cable is subjected to under the power frequency voltage, wherein the insulation shielding layer is located on the outside of the insulation layer of the cable, and its main function is to prevent the external electromagnetic field from interfering with the internal signal of the cable, and at the same time reduce the influence of the internal electric field of the cable on the external environment; the demand judgment result refers to the judgment result of whether the obtained conductor shielding field strength and insulation shielding field strength meet the production requirements.

[0068] In this embodiment, the restricted influencing factors include first-level restricted influencing factors and second-level restricted influencing factors, which refer to the influencing factors that currently cause the conductor shielding field strength or the insulation shielding field strength to fail to meet the production requirements, such as external environment and manufacturing process factors; the target production adjustment suggestion refers to a method for adjusting the production process generated by analyzing the restricted influencing factors, so as to achieve the adjustment of the conductor shielding field strength or the insulation shielding field strength that currently does not meet the production requirements; the field strength recommendation adjustment effect is used to indicate the degree of deviation between the shielding field strength after the production department implements the production process adjustment according to the target production adjustment suggestion and the set shielding field strength standard.

[0069] The beneficial effects of the above technical solution are: by analyzing the currently calculated conductor shielding field strength and insulation shielding field strength, the judgment result of whether the shielding field strength of the current target cable meets the production requirements is obtained; if the shielding field strength does not meet the requirements, the limited influencing factors of the conductor shielding field strength or the insulation shielding field strength are analyzed to generate corresponding production suggestions and feedback to the production department for adjustment, and the effect of the field strength suggestion adjustment is supervised, so as to realize the precise adjustment of the insulation and shielding performance of the cable to meet the production requirements, and provide guarantee for the safe and reliable operation of the cable.

[0070] The embodiment of the present invention provides a cable insulation auxiliary adjustment method, which determines the conductor shielding field strength and insulation shielding field strength of the target cable based on the key parameters of the target cable obtained, including:

[0071] Collect key parameters of target cables in real time;

[0072] Based on the cable type and specification, the required field strength distribution calculation formula of the target cable is obtained by screening from the field strength distribution calculation list;

[0073] The collected key parameters of the target cable are substituted into the required field strength distribution formula to calculate the conductor shielding field strength and insulation shielding field strength of the target cable.

[0074] In this embodiment, the cable is an electric energy or signal transmission device, and the cable types include power cables, control cables, compensation cables, shielded cables, marine cables, mining cables, aluminum alloy cables, etc.; the cable specifications refer to the cross-sectional dimensions; the key parameters include the rated voltage, the inner and outer diameter parameters of the conductor and the insulation layer.

[0075] In this embodiment, the field strength distribution calculation list consists of cables of different types and specifications and corresponding field strength distribution calculation formulas; the required field strength distribution calculation formula refers to the corresponding field strength distribution calculation formula of the current target cable screened from the field strength distribution calculation list based on the type and specification.

[0076] In this embodiment, for example, there is a target cable a1: 3000mm 2 The corresponding calculation formula for the required field strength distribution of the conductor cross-section cable is as follows:

[0077]

[0078] Wherein, E(x) represents the electric field at point x, in kilovolts / millimeter (kV / mm); x represents the distance from point x to the center of the cable, in millimeters (mm); U0 represents the rated voltage of the cable, in volts (V); d represents the inner radius of the insulation, in millimeters (mm); D represents the outer radius of the insulation, in millimeters (mm); the maximum field strength E(max) is the field strength at the conductor shield, that is, the conductor shielding field strength; the minimum field strength E(min) is the field strength at the insulation shield, that is, the insulation shielding field strength.

[0079] In this embodiment, the conductor shielding field strength refers to the field strength that the conductor shielding layer (inner shield) of the cable is subjected to under the power frequency voltage, wherein the conductor shielding layer is in close contact with the insulating layer, which can improve the withstand voltage level of the cable; the insulation shielding field strength refers to the electric field strength that the insulation shielding layer (outer shield) of the cable is subjected to under the power frequency voltage, wherein the insulation shielding layer is located on the outside of the insulation layer of the cable, and its main function is to prevent the external electromagnetic field from interfering with the internal signal of the cable, while reducing the impact of the internal electric field of the cable on the external environment.

[0080] The beneficial effect of the above technical solution is: by inputting the key parameters of the target cable into the field strength distribution calculation formula screened according to the cable type and specifications, the conductor shielding field strength and insulation shielding field strength of the current target cable are obtained, which can be used to accurately quantify the insulation and shielding performance of the current target cable.

[0081] The embodiment of the present invention provides a cable insulation auxiliary adjustment method, which analyzes the conductor shielding field strength and the insulation shielding field strength, judges whether the current shielding field strength meets the production demand, and obtains the demand judgment result, including:

[0082] Extracting and setting the field strength shielding standard from the cable production standard data of the target cable;

[0083] The conductor shielding field strength and the insulation shielding field strength of the target cable are respectively compared with the corresponding set field strength shielding standards, and a first conductor shielding comparison difference and a first insulation shielding comparison difference are obtained in turn;

[0084] Perform deviation correction on the first shielding comparison difference and the second shielding comparison difference to obtain a corrected conductor shielding comparison difference and a corrected insulation shielding comparison difference in turn;

[0085] Comparing the modified conductor shielding comparison difference and the modified insulation shielding comparison difference with the corresponding set shielding field strength difference thresholds respectively;

[0086] If the modified conductor shielding comparison difference is less than the conductor-set shielding field strength difference threshold, it is determined that the current conductor shielding field strength meets the production requirements and is output as a demand judgment result;

[0087] Otherwise, it is determined that the current conductor shielding field strength does not meet the production requirements and is output as a demand judgment result;

[0088] If the modified insulation shielding comparison difference is less than the insulation-set shielding field strength difference threshold, it is determined that the current insulation shielding field strength meets the production requirements and is output as a demand judgment result;

[0089] Otherwise, it is determined that the current insulation shielding field strength does not meet the production requirements and is output as a demand judgment result.

[0090] In this embodiment, the cable production standard data refers to the key points of the cable production specifications, including basic production requirements, such as production sites, personnel requirements, material standards, such as conductor materials, insulation materials and sheath materials, preparation standards, such as field strength shielding standards, welding standards, and other standards such as cable types, specifications, environmental protection requirements, and safe production regulations; the set field strength shielding standard is the field strength shielding standard extracted from the cable production standard data of the target cable, including conductor-set field strength shielding standard and insulation-set field strength shielding standard.

[0091] In this embodiment, the first conductor shielding comparison difference is the difference obtained by comparing the currently obtained conductor shielding field strength with the conductor-set field strength shielding standard; the first insulation shielding comparison difference is the difference obtained by comparing the currently obtained insulation shielding field strength with the insulation-set field strength shielding standard; the corrected conductor shielding comparison difference is obtained by correcting the first conductor shielding comparison difference based on the analysis of the key parameter errors caused by the field strength calculation error and the cable loss; the corrected insulation shielding comparison difference is obtained by correcting the first insulation shielding comparison difference based on the analysis of the key parameter errors caused by the field strength calculation error and the cable loss.

[0092] In this embodiment, the shielding field strength difference threshold is pre-set, including conductor-set shielding field strength difference threshold and insulation-set shielding field strength difference threshold; the demand judgment result refers to the judgment result of whether the obtained conductor shielding field strength and insulation shielding field strength meet the production requirements.

[0093] The beneficial effect of the above technical solution is: by comparing and analyzing the currently obtained conductor shielding field strength and insulation shielding field strength with the set field strength shielding standard, it is possible to effectively determine whether the conductor shielding field strength and insulation shielding field strength of the current target cable meet production requirements, which helps to promptly discover abnormal problems in the cable insulation performance.

[0094] The embodiment of the present invention provides a cable insulation auxiliary adjustment method. According to the demand judgment result, if there is a shielding field strength that does not meet the production demand, the restricted influencing factors are analyzed and a target production adjustment suggestion is generated, including:

[0095] According to the demand judgment result, if the current conductor shielding field strength or insulation shielding field strength does not meet the production demand, all possible influencing factors that the conductor shielding field strength or insulation shielding field strength does not meet the production demand are obtained, and a list of possible influencing factors is constructed;

[0096] Perform anomaly detection on the general influencing factors in the list of possible influencing factors according to the set detection mechanism. If anomalies exist, the current general influencing factors will be regarded as first-level restricted influencing factors.

[0097] Obtaining a preset production adjustment strategy corresponding to the first-level restricted influencing factor as a target production adjustment suggestion output;

[0098] The remaining possible influencing factors in the list of possible influencing factors other than the general influencing factors are regarded as specific factors;

[0099] Extracting historical field strength production adjustment records of all cables of the same type and specification as the target cable from the cable insulation auxiliary adjustment database to establish a first historical adjustment data set;

[0100] Acquire historical field strength production adjustment records under a shielding field strength condition consistent with the current conductor shielding field strength or insulation shielding field strength from the first historical adjustment data set, and establish a second historical adjustment data set;

[0101] Based on the second historical adjustment data set, obtaining the historical occurrence number of each specific factor and the historical field intensity adjustment effect coefficient of the corresponding historical production adjustment strategy;

[0102] Determine the first impact analysis value for each specific factor based on the historical occurrence number and the historical field strength adjustment effect coefficient;

[0103] Specific factors whose first impact analysis values ​​are greater than the set analysis threshold are considered as second-level restricted impact factors;

[0104] The historical production adjustment strategy of the secondary restricted influencing factor is calibrated as an evaluation production adjustment strategy, and a feasibility evaluation is performed to generate a strategy evaluation value;

[0105] The corresponding evaluated production adjustment strategy with a strategy evaluation value greater than the set evaluation threshold is used as a reference production adjustment suggestion;

[0106] Analyze and adjust relevant parameters in the reference production adjustment suggestion to obtain adjusted relevant parameter values;

[0107] The adjusted relevant parameter values ​​are brought into the corresponding reference production adjustment suggestions, and the target production adjustment suggestions are generated and output.

[0108] In this embodiment, possible influencing factors refer to influencing factors that may cause the conductor shielding field strength or the insulation shielding field strength to fail to meet production requirements, including external environment, surface quality of conductor or insulation materials, installation factors, manufacturing process factors, etc., among which general influencing factors refer to external environment, surface quality of conductor or insulation materials and installation factors; setting a detection mechanism refers to obtaining data for each general influencing factor using a preset data acquisition tool to make judgments on environmental anomalies, material surface anomalies and installation anomalies.

[0109] In this embodiment, the first-level restricted influencing factors refer to general influencing factors with abnormalities; the preset production adjustment strategy is pre-set; and the specific factors refer to the remaining possible influencing factors in the list of possible influencing factors except the general influencing factors.

[0110] In this embodiment, the cable insulation auxiliary adjustment database is used to store historical field strength production adjustment records, wherein the historical field strength production adjustment records include historical influencing factors, historical production adjustment strategies and corresponding historical field strength adjustment effect coefficients; the first historical adjustment data set is a data set established by the historical field strength production adjustment records of all cables of the same type and specification as the target cable; the second historical adjustment data set is a data set established by obtaining historical field strength production adjustment records under the shielding field strength consistent with the current conductor shielding field strength or insulation shielding field strength from the first historical adjustment data set.

[0111] In this embodiment, the historical field strength adjustment effect coefficient is used to quantify the field strength adjustment result achieved after adjusting the production process using the historical production adjustment strategy; the first impact analysis value is used to characterize the degree of influence of specific factors on the conductor shielding field strength or the insulation shielding field strength that does not meet production requirements; and the analysis threshold is set in advance.

[0112] In this embodiment, the secondary restricted influencing factor refers to a specific factor whose first influencing analysis value is greater than the set analysis threshold; the evaluated production adjustment strategy refers to the corresponding historical production adjustment strategy of the secondary restricted influencing factor; the strategy evaluation value is used to express the feasibility of the evaluated production adjustment strategy; the set evaluation threshold is set in advance; the reference production adjustment suggestion refers to the evaluated production adjustment strategy whose strategy evaluation value is greater than the set evaluation threshold; the relevant parameters refer to the adjustable parameters in the reference production adjustment suggestion, such as extrusion speed and pulling speed; the target production adjustment suggestion refers to the preset production adjustment strategy corresponding to the primary restricted influencing factor and the production adjustment suggestion obtained after analyzing and adjusting the relevant parameters in the reference production adjustment suggestion, which is used to adjust the production process to achieve the adjustment of the conductor shielding field strength or insulation shielding field strength that does not currently meet the production needs.

[0113] The beneficial effect of the above technical solution is: when the conductor shielding field strength or the insulation shielding field strength does not meet the production requirements, the restricted influencing factors are analyzed to generate target production adjustment suggestions, ensuring that the production adjustment suggestions can effectively and reliably solve the problem in a targeted manner, thereby achieving accurate improvement of the cable insulation and shielding performance while reducing maintenance costs.

[0114] The embodiment of the present invention provides a cable insulation auxiliary adjustment method, and the calculation formula of the strategy evaluation value is as follows:

[0115] Where P i Represented as the strategy evaluation value of the i-th production adjustment strategy; C i It is represented as the adjustment cost of the i-th production adjustment strategy; α is the influence weight of the adjustment cost on the strategic evaluation of the production adjustment strategy; n i1 It is represented by the number of occurrences of the i-th evaluated production adjustment strategy in the first historical adjustment data set; n0 is represented by the total number of evaluated production adjustment strategies; d t It is expressed as the historical field intensity adjustment effect coefficient obtained at time t, which is the closest to the current time, using the i-th evaluated production adjustment strategy for adjustment; It is expressed as the average historical field strength adjustment effect coefficient after adjustment using the i-th evaluation production adjustment strategy; m i0 It is expressed as the number of times the historical field strength adjustment effect coefficient after adjustment using the i-th evaluation production adjustment strategy is greater than the average historical field strength adjustment effect coefficient; m i1 It is expressed as the number of times the adjustment effect coefficient of the historical field strength after adjustment using the i-th evaluation production adjustment strategy is not greater than the average historical field strength adjustment effect coefficient; It is expressed as the jth historical field strength adjustment effect coefficient greater than the average historical field strength adjustment effect coefficient obtained after adjustment using the i-th evaluated production adjustment strategy, where j = 1, 2, 3, ..., mi0 ; It is expressed as the kth historical field strength adjustment effect coefficient that is not greater than the average historical field strength adjustment effect coefficient after adjustment using the i-th evaluated production adjustment strategy, where k = 1, 2, 3, ..., m i1 ; β represents the influence weight of the field strength adjustment effect of the production adjustment strategy on the strategy evaluation; Δt represents the time interval between the current moment and moment t; μ represents the influence factor of the target cable loss on the field strength adjustment effect.

[0116] The beneficial effect of the above technical solution is that by calculating the strategy evaluation value, appropriate reference production adjustment suggestions can be obtained to provide data support for the target production adjustment suggestions, thereby ensuring the feasibility and reliability of the target production adjustment suggestions.

[0117] The embodiment of the present invention provides a cable insulation auxiliary adjustment method, which analyzes and adjusts the relevant parameters in the reference production adjustment suggestion to obtain adjusted relevant parameter values, including:

[0118] Obtaining a preset correlation between the reference production adjustment suggestion and the corresponding relevant parameter;

[0119] Extracting all historical field strength adjustment effect coefficients obtained after adjustment using the current reference production adjustment suggestion from the first historical adjustment data set, combining them with the historical parameter values ​​of the corresponding related parameters, and constructing a plurality of parameter-effect curves in time series;

[0120] Extracting the curve characteristics of the parameter-effect curve diagram and performing combined analysis to obtain the parameter-effect variation coefficient;

[0121] The parameter-effect variation coefficient, the preset correlation and the current field intensity adjustment effect requirements are combined for analysis to obtain the target adjustment coefficient of the corresponding relevant parameters;

[0122] Extracting all historical field strength adjustment effect coefficients obtained after adjustment using the current reference production adjustment suggestion from the second historical adjustment data set, combining and analyzing with the historical parameter values ​​of the corresponding relevant parameters, and obtaining an estimated parameter benchmark value of each relevant parameter;

[0123] The target adjustment coefficient is used to adjust the estimated parameter baseline value to obtain the corresponding adjusted related parameter value.

[0124] In this embodiment, the reference production adjustment suggestion refers to an evaluated production adjustment strategy whose strategy evaluation value is greater than a set evaluation threshold; the relevant parameters refer to the adjustable parameters in the reference production adjustment suggestion, such as extrusion speed and pulling speed; the preset correlation refers to a pre-set numerical value used to quantify the degree of association of the relevant parameters with the corresponding reference production adjustment suggestion.

[0125] In this embodiment, for example, there is a reference production adjustment suggestion 11: adjusting the thickness of the insulating shielding layer, and the corresponding related parameters include the screw speed, extrusion pressure and temperature of the extruder and the like.

[0126] In this embodiment, the historical field strength adjustment effect coefficient is used to quantify the field strength adjustment result achieved after adjusting the production process using the historical production adjustment strategy; the first historical adjustment data set is a data set established by the historical field strength production adjustment records of all cables of the same type and specification as the target cable; the parameter-effect curve diagram refers to a curve diagram constructed in time series with all historical field strength adjustment effect coefficients obtained after adjustment using the current reference production adjustment suggestion extracted from the first historical adjustment data set as dependent variables and the historical parameter values ​​of the corresponding relevant parameters as independent variables; the parameter-effect change coefficient is used to express the degree of change of the influence of the relevant parameters on the historical field strength adjustment effect coefficient of the reference production adjustment suggestion over time.

[0127] In this embodiment, the current field strength adjustment effect requirement refers to the standard that the conductor shielding field strength or insulation shielding field strength of the current target cable needs to meet; the second historical adjustment data set is a data set established by obtaining historical field strength production adjustment records under shielding field strength conditions consistent with the current conductor shielding field strength or insulation shielding field strength from the first historical adjustment data set; the estimated parameter reference value refers to the estimated reference value of the relevant parameter; the target adjustment coefficient is used to adjust the estimated parameter reference value to obtain the adjusted relevant parameters.

[0128] The beneficial effect of the above technical solution is: by analyzing and adjusting the relevant parameters in the reference production adjustment suggestions, data support is provided for generating target production adjustment suggestions, the reliability of the target production adjustment suggestions can be guaranteed, and then effective adjustment of the cable insulation and shielding performance can be achieved.

[0129] The embodiment of the present invention provides a cable insulation auxiliary adjustment method, which feeds back the target production adjustment suggestion to the production department for adjustment, and monitors the effect of the field strength suggestion adjustment, including:

[0130] Feedback the target production adjustment suggestions to the production department for implementation, and calculate the adjusted conductor shielding field strength and insulation shielding field strength;

[0131] The adjusted conductor shielding field strength and insulation shielding field strength are respectively compared with the corresponding set field strength shielding standards to obtain adjustment comparison results;

[0132] Based on the comparative analysis of the adjustment comparison result and the set shielding field strength difference threshold, the field strength recommended adjustment effect is obtained;

[0133] When the suggested adjustment effect of the field strength meets the cable insulation adjustment requirement, a field strength adjustment record is generated and stored;

[0134] When the field strength adjustment suggestion effect does not meet the cable insulation adjustment requirement, re-optimize the key parameters in the target production adjustment suggestion to generate an optimized target production adjustment suggestion;

[0135] Use the optimized target production adjustment suggestions to make readjustments until the field strength adjustment effect meets the cable insulation adjustment requirements.

[0136] In this embodiment, the target production adjustment suggestion refers to a method for adjusting the production process generated by analyzing the restricted influencing factors, so as to achieve the adjustment of the conductor shielding field strength or the insulation shielding field strength that does not currently meet the production requirements; the set field strength shielding standard is the field strength shielding standard extracted from the cable production standard data of the target cable, including the conductor-set field strength shielding standard and the insulation-set field strength shielding standard.

[0137] In this embodiment, the adjustment comparison result refers to the result obtained by comparing the adjusted conductor shielding field strength and insulation shielding field strength with the corresponding set field strength shielding standards; the set shielding field strength difference threshold is pre-set, including the conductor-set shielding field strength difference threshold and the insulation-set shielding field strength difference threshold; the field strength recommended adjustment effect is used to indicate the degree of deviation between the shielding field strength after the production process is adjusted according to the target production adjustment suggestion implemented by the production department and the set shielding field strength standard; the cable insulation adjustment requirement refers to the adjustment effect expected to be achieved by the conductor shielding field strength or the insulation shielding field strength of the current target cable.

[0138] The beneficial effect of the above technical solution is: by feeding back the target production adjustment suggestions to the production department for implementation and supervising the effect of the field strength adjustment suggestions, it can help the production department quickly solve abnormal problems in the cable insulation performance, thereby ensuring the electrical performance and reliability of the cable while reducing maintenance costs.

[0139] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cable insulation auxiliary adjustment method, characterized in that: include: Step 1: Based on the key parameters of the target cable obtained, determine the conductor shielding field strength and insulation shielding field strength of the target cable; Step 2: Analyze the conductor shielding field strength and the insulation shielding field strength, determine whether the current shielding field strength meets the production requirements, and obtain a demand determination result; Step 3: According to the demand judgment result, if the shielding field strength does not meet the production demand, the limiting influencing factors are analyzed and target production adjustment suggestions are generated; Step 4: Feedback the target production adjustment suggestions to the production department for adjustment implementation, and monitor the effect of the field strength adjustment suggestions.

2. A cable insulation auxiliary adjustment method according to claim 1, characterized in that: Based on the key parameters of the target cable, determine the conductor shielding field strength and insulation shielding field strength of the target cable, including: Collect key parameters of target cables in real time; Based on the cable type and specification, the required field strength distribution calculation formula of the target cable is obtained by screening from the field strength distribution calculation list; The collected key parameters of the target cable are substituted into the required field strength distribution formula to calculate the conductor shielding field strength and insulation shielding field strength of the target cable.

3. A cable insulation auxiliary adjustment method according to claim 2, characterized in that: The key parameters of the target cable include rated voltage, inner and outer diameter parameters of the conductor and insulation layer.

4. A cable insulation auxiliary adjustment method according to claim 1, characterized in that: Analyze the conductor shielding field strength and the insulation shielding field strength, judge whether the current shielding field strength meets the production demand, and obtain the demand judgment result, including: Extracting and setting the field strength shielding standard from the cable production standard data of the target cable; The conductor shielding field strength and the insulation shielding field strength of the target cable are respectively compared with the corresponding set field strength shielding standards, and a first conductor shielding comparison difference and a first insulation shielding comparison difference are obtained in turn; Perform deviation correction on the first shielding comparison difference and the second shielding comparison difference to obtain a corrected conductor shielding comparison difference and a corrected insulation shielding comparison difference in sequence; Comparing the modified conductor shielding comparison difference and the modified insulation shielding comparison difference with the corresponding set shielding field strength difference thresholds respectively; If the modified conductor shielding comparison difference is less than the conductor-set shielding field strength difference threshold, it is determined that the current conductor shielding field strength meets the production requirements and is output as a demand judgment result; Otherwise, it is determined that the current conductor shielding field strength does not meet the production requirements and is output as a demand judgment result; If the modified insulation shielding comparison difference is less than the insulation-set shielding field strength difference threshold, it is determined that the current insulation shielding field strength meets the production requirements and is output as a demand judgment result; Otherwise, it is determined that the current insulation shielding field strength does not meet the production requirements and is output as a demand judgment result.

5. A cable insulation auxiliary adjustment method according to claim 1, characterized in that: According to the demand judgment result, if the shielding field strength does not meet the production requirements, the restricted influencing factors are analyzed and target production adjustment suggestions are generated, including: According to the demand judgment result, if the current conductor shielding field strength or insulation shielding field strength does not meet the production demand, all possible influencing factors that the conductor shielding field strength or insulation shielding field strength does not meet the production demand are obtained, and a list of possible influencing factors is constructed; Perform anomaly detection on the general influencing factors in the list of possible influencing factors according to the set detection mechanism. If anomalies exist, the current general influencing factors will be regarded as first-level restricted influencing factors. Obtaining a preset production adjustment strategy corresponding to the first-level restricted influencing factor as a target production adjustment suggestion output; The remaining possible influencing factors in the list of possible influencing factors other than the general influencing factors are regarded as specific factors; Extracting historical field strength production adjustment records of all cables of the same type and specification as the target cable from the cable insulation auxiliary adjustment database to establish a first historical adjustment data set; Acquire historical field strength production adjustment records under a shielding field strength condition consistent with the current conductor shielding field strength or insulation shielding field strength from the first historical adjustment data set, and establish a second historical adjustment data set; Based on the second historical adjustment data set, obtaining the historical occurrence number of each specific factor and the historical field intensity adjustment effect coefficient of the corresponding historical production adjustment strategy; Determine the first impact analysis value for each specific factor based on the historical occurrence number and the historical field strength adjustment effect coefficient; Specific factors whose first impact analysis values ​​are greater than the set analysis threshold are considered as second-level restricted impact factors; The historical production adjustment strategy of the secondary restricted influencing factor is calibrated as an evaluation production adjustment strategy, and a feasibility evaluation is performed to generate a strategy evaluation value; The corresponding evaluated production adjustment strategy with a strategy evaluation value greater than the set evaluation threshold is used as a reference production adjustment suggestion; Analyze and adjust relevant parameters in the reference production adjustment suggestion to obtain adjusted relevant parameter values; The adjusted relevant parameter values ​​are brought into the corresponding reference production adjustment suggestions, and the target production adjustment suggestions are generated and output.

6. A cable insulation auxiliary adjustment method according to claim 5, characterized in that: The calculation formula of the strategy evaluation value is as follows: Where P i Represents the strategy evaluation value of the i-th production adjustment strategy; C i It is represented as the adjustment cost of the i-th production adjustment strategy; α is the influence weight of the adjustment cost on the strategic evaluation of the production adjustment strategy; n i1 It is represented by the number of occurrences of the i-th evaluated production adjustment strategy in the first historical adjustment data set; n0 is represented by the total number of evaluated production adjustment strategies; d t It is expressed as the historical field intensity adjustment effect coefficient obtained at time t, which is the closest to the current time, using the i-th evaluated production adjustment strategy; d i It is expressed as the average historical field strength adjustment effect coefficient after adjustment using the i-th evaluation production adjustment strategy; m i0 It is expressed as the number of times the historical field strength adjustment effect coefficient after adjustment using the i-th evaluation production adjustment strategy is greater than the average historical field strength adjustment effect coefficient; m i1 It is expressed as the number of times the adjustment effect coefficient of the historical field strength after adjustment using the i-th evaluation production adjustment strategy is not greater than the average historical field strength adjustment effect coefficient; It is expressed as the jth historical field strength adjustment effect coefficient greater than the average historical field strength adjustment effect coefficient obtained after adjustment using the i-th evaluated production adjustment strategy, where j = 1, 2, 3, ..., m i0 ; It is expressed as the kth historical field strength adjustment effect coefficient that is not greater than the average historical field strength adjustment effect coefficient after adjustment using the i-th evaluated production adjustment strategy, where k = 1, 2, 3, ..., m i1 ; β represents the influence weight of the field strength adjustment effect of the production adjustment strategy on the strategy evaluation; Δt represents the time interval between the current moment and moment t; μ represents the influence factor of the target cable loss on the field strength adjustment effect.

7. A cable insulation auxiliary adjustment method according to claim 6, characterized in that: Analyze and adjust the relevant parameters in the reference production adjustment suggestion to obtain adjusted relevant parameter values, including: Obtaining a preset correlation between the reference production adjustment suggestion and the corresponding relevant parameter; Extracting all historical field strength adjustment effect coefficients obtained after adjustment using the current reference production adjustment suggestion from the first historical adjustment data set, combining them with the historical parameter values ​​of the corresponding related parameters, and constructing a plurality of parameter-effect curves in time series; Extracting the curve characteristics of the parameter-effect curve diagram and performing combined analysis to obtain the parameter-effect variation coefficient; The parameter-effect variation coefficient, the preset correlation and the current field intensity adjustment effect requirements are combined for analysis to obtain the target adjustment coefficient of the corresponding relevant parameters; Extracting all historical field strength adjustment effect coefficients obtained after adjustment using the current reference production adjustment suggestion from the second historical adjustment data set, combining and analyzing with the historical parameter values ​​of the corresponding relevant parameters, and obtaining an estimated parameter benchmark value of each relevant parameter; The target adjustment coefficient is used to adjust the estimated parameter baseline value to obtain the corresponding adjusted related parameter value.

8. A cable insulation auxiliary adjustment method according to claim 1, characterized in that: Feedback the target production adjustment suggestions to the production department for implementation, and monitor the effect of the field strength adjustment suggestions, including: Feedback the target production adjustment suggestions to the production department for implementation, and calculate the adjusted conductor shielding field strength and insulation shielding field strength; The adjusted conductor shielding field strength and insulation shielding field strength are respectively compared with the corresponding set field strength shielding standards to obtain adjustment comparison results; Based on the comparative analysis of the adjustment comparison result and the set shielding field strength difference threshold, the field strength recommended adjustment effect is obtained; When the suggested adjustment effect of the field strength meets the cable insulation adjustment requirement, a field strength adjustment record is generated and stored; When the field strength adjustment suggestion effect does not meet the cable insulation adjustment requirement, re-optimize the key parameters in the target production adjustment suggestion to generate an optimized target production adjustment suggestion; Use the optimized target production adjustment suggestions to make readjustments until the field strength adjustment suggestions meet the cable insulation adjustment requirements.

Images