Electric power material verification method combining spot check and first check

Abstract

The invention discloses an electric power material verification method combining sampling inspection and first inspection, and relates to the technical field of material quality inspection, and the method comprises the steps: constructing a sampling inspection mathematical model and a first inspection mathematical model of electric power materials; obtaining total first inspection time delay, verification equipment utilization rate, electric power material circulation efficiency and first inspection time stability in joint sampling inspection and first inspection according to the sampling inspection and first inspection mathematical models; obtaining an optimized objective function of electric power material verification according to the total first detection time delay, the verification equipment utilization rate, the electric power material circulation efficiency and the first detection time stability; constructing constraint conditions of the optimization objective function; and solving the optimization objective function according to constraint conditions to obtain an electric power material verification strategy combining spot check and first check. The method not only follows the basic principle of joint sampling inspection and first inspection, but also comprehensively considers resource limitation, priority difference and uncertainty factors, and realizes a more reasonable and efficient verification scheme.

Description

Technical Field

[0001] The present invention relates to the technical field of material quality inspection, and in particular to a method for verifying electric power materials by combining random inspection and initial inspection. Background Art

[0002] As an important part of the power system, the quality of power materials is directly related to the stability and reliability of power facilities. Therefore, ensuring the quality of power materials is a key link in ensuring the safe and stable operation of the power system.

[0003] Traditional methods for the verification of power materials mostly rely on manual operations, which leads to problems of low efficiency and high cost, especially when dealing with large quantities of power materials. With the development of mathematical modeling, optimization algorithms and automation technology, the verification methods of power materials based on these technologies have made significant progress. For example, the existing automated verification system introduces mathematical models and optimization algorithms, including mixed integer linear programming (MILP), genetic algorithm (GA), dynamic programming (DP) and simulated annealing algorithm (SA). The MILP algorithm can help determine the optimal inspection combination, maximize the inspection effect under limited resources, and effectively manage the inspection budget and resource allocation. The GA algorithm is suitable for large-scale problems and can search for the optimal solution in a complex solution space to find the best inspection solution. The DP algorithm can optimize the inspection strategy at each stage and improve the efficiency of the overall inspection process. They can reduce manual intervention to a certain extent and improve the efficiency and consistency of verification. The SA algorithm finds a near-optimal solution by gradually adjusting the inspection strategy, which is suitable for problems with a large solution space. However, the existing automation system usually only optimizes a single link in the verification process, making it difficult to achieve the overall collaborative optimization of joint sampling and first inspection, and has limited adaptability to material characteristics and verification environment. Summary of the invention

[0004] In view of the difficulty in realizing the overall coordinated optimization of joint sampling and initial inspection in the prior art, the present invention provides a method for verifying power materials by joint sampling and initial inspection, which can fully consider various practical factors and realize the joint sampling and initial inspection of power materials. The specific technical scheme is as follows:

[0005] A method for testing power materials by combining random inspection and initial inspection, comprising:

[0006] Construct mathematical models for random inspection and initial inspection of power materials;

[0007] According to the mathematical model of random inspection and first inspection, the total first inspection time delay, the utilization rate of inspection equipment, the efficiency of power material circulation and the stability of first inspection time in the joint random inspection and first inspection are obtained;

[0008] According to the total first inspection time delay, the utilization rate of the inspection equipment, the power material circulation efficiency and the first inspection time stability, the optimization objective function of the power material inspection is obtained;

[0009] According to the joint sampling and first inspection process of power materials, the constraint conditions of the optimization objective function are constructed, including material priority constraint, time interval constraint and equipment load constraint;

[0010] The optimization objective function is solved according to the constraint conditions to obtain the power material verification strategy for joint random inspection and first inspection.

[0011] Preferably, the construction of a mathematical model for random inspection and initial inspection of power materials includes:

[0012] Get the properties of power materials and build a collection of power materials;

[0013] Extracting different types of power materials from the power material set according to a preset dynamic sampling ratio to obtain a sampling model;

[0014] According to the sampling inspection model, the sampled power materials are tested and inspected to obtain the test results;

[0015] According to the test results, the qualified power materials are selected for random inspection and a first inspection model is constructed.

[0016] Preferably, obtaining the total first inspection time delay in the combined random inspection and first inspection according to the random inspection and first inspection mathematical model comprises:

[0017] According to the sampling inspection model, the importance coefficient and arrival time of power materials in the inspection are obtained;

[0018] Obtain the end time of the first inspection of power materials according to the first inspection model;

[0019] The total first inspection time delay is calculated based on the importance coefficient, arrival time and first inspection end time of power materials.

[0020] Preferably, the utilization rate of the inspection equipment in the combined random inspection and the first inspection is obtained according to the mathematical model of random inspection and first inspection;

[0021] Get the total processing time for verification and testing of different types of power materials in joint sampling and initial inspection;

[0022] Obtain the length of the available time interval for the corresponding calibration equipment in the joint sampling inspection and the first inspection;

[0023] The utilization rate of the testing equipment is calculated based on the total processing time and the length of the available time interval.

[0024] Preferably, the power material circulation efficiency in the joint random inspection and the first inspection is obtained according to the random inspection and the first inspection mathematical model, including:

[0025] Obtain the inspection speed of power materials from the pending inspection status to the inspected status during joint random inspection and first inspection;

[0026] Obtain the average speed of circulation between power materials in joint sampling and initial inspection;

[0027] The power material circulation efficiency is calculated based on the detection speed, average speed and preset weight factors of power materials.

[0028] Preferably, the obtaining of the stability of the first inspection time in the joint random inspection and the first inspection according to the random inspection and the first inspection mathematical model includes:

[0029] Get the time difference between the first inspection end times of the same power material in the first inspection;

[0030] The first inspection time stability is calculated based on the time difference and a preset stability weight coefficient.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] A method for testing electric power materials by joint sampling and first inspection of the present invention is to construct a mathematical model for the sampling and first inspection of electric power materials; obtain the total first inspection time delay, testing equipment utilization, electric power material circulation efficiency and first inspection time stability in the joint sampling and first inspection according to the mathematical model; obtain the optimization objective function of electric power material testing according to the total first inspection time delay, testing equipment utilization, electric power material circulation efficiency and first inspection time stability; construct the constraint conditions of the optimization objective function according to the process of joint sampling and first inspection of electric power materials, including material priority constraint, time interval constraint and equipment load constraint; solve the optimization objective function according to the constraint conditions to obtain the testing strategy of electric power materials by joint sampling and first inspection. The present invention not only follows the basic principles of joint sampling and first inspection, but also comprehensively considers resource limitations, priority differences and uncertainty factors to achieve a more reasonable and efficient testing scheme, thereby improving the testing efficiency and accuracy, optimizing the testing plan and reducing the enterprise cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0034] Figure 1 The present invention is a flow chart of a method for testing electric power materials by combining random inspection and initial inspection.

[0035] Figure 2 The present invention is a flowchart of another embodiment of a method for testing electric power materials by combining random inspection and initial inspection. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0038] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0039] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0040] See the following examples Figure 1 to Figure 2 .

[0041] The present application embodiment provides a method for testing electric power materials by combining random inspection and initial inspection, including:

[0042] Step S01, constructing a mathematical model for random inspection and initial inspection of power materials;

[0043] Specifically, the construction of the mathematical model for random inspection and initial inspection of power materials includes:

[0044] Step S11: Obtain the attributes of electric power materials and construct an electric power material set U; the electric power material set U is:

[0045] U={U1,U2,U3,...,U n}

[0046] The subset of the power material set U is expressed as:

[0047] U i = {qi ,v i ,a i ,b i ,e i}

[0048] The attributes of the subset include: i represents the i-th batch of power materials; v i The specific type of power materials; a i Represents the arrival time of power materials; b i Represents the time required to test electrical materials; i Represents the importance coefficient of power materials in the verification;

[0049] The importance coefficient can be determined by the following formula:

[0050]

[0051] Among them, f i g is the key performance indicator of materials; i is the urgency index for grid stability; ξ1, ξ2, μ1 and μ2 are weight coefficients used to adjust the role of key performance indicators and urgency indicators in the importance coefficient; are adjustment parameters; ω and θ are specific constants;

[0052] Step S12: According to the preset dynamic sampling ratio r v,t Different types of power materials are extracted from the power material set to obtain a sampling model; the sampling model is as follows:

[0053]

[0054] Where M t represents the number of power materials sampled; t represents time; |U v,t | represents the quantity of power materials of type v at time t;

[0055] For different types of power materials, the corresponding dynamic sampling ratio can be set according to their historical quality data, importance and arrival time distribution.

[0056] Step S13: perform inspection and testing on the inspected power materials according to the inspection model to obtain the inspection result s i,t ;

[0057] Step S14: Select qualified power materials for random inspection according to the inspection results, and build a first inspection model;

[0058] The test result is s i,t Make the following judgment:

[0059] Ifi,t =1, it is marked as qualified for random inspection and ready for first inspection; If s i,t =0, it is marked as unqualified in random inspection;

[0060] The first inspection model is:

[0061] W t = {U i |s i,t =1}

[0062] That is, the qualified power materials are selected to form the first inspection set. For each type of inspection equipment, the available time range at different times is set as [U min,v,t ,U max,v,t ], and determine the efficiency parameter for processing different types of materials at different times as η v,t . Define the first inspection start time as The first inspection ends at And satisfy the following formula:

[0063]

[0064] in, Indicates the end time of the first inspection of the previous material at time t.

[0065] Step S02: Obtain the total first inspection time delay, inspection equipment utilization rate, power material circulation efficiency and first inspection time stability in the combined random inspection and first inspection according to the random inspection and first inspection mathematical model;

[0066] Specifically, the total first inspection time delay in the combined random inspection and first inspection obtained according to the random inspection and first inspection mathematical model includes:

[0067] According to the sampling model, the importance coefficient e of power materials in the verification is obtained i and arrival time i ;

[0068] Obtain the end time of the first inspection of power materials according to the first inspection model

[0069] According to the importance coefficient of electric power materials i 、Arrival time i and the first inspection end time The total first inspection time delay L is calculated 1,t The total first inspection time delay L 1,t The calculation of is as follows:

[0070]

[0071] Total first inspection time delay L 1,tIt measures the difference between the end of the first inspection at time t and the arrival of the materials, and the importance coefficient e i The introduction of makes key power materials occupy a more important position in the optimization objective function.

[0072] Specifically, the utilization rate of the inspection equipment in the combined random inspection and the first inspection is obtained according to the mathematical model of the random inspection and the first inspection, including:

[0073] Get the total processing time for verification and testing of different types of power materials in joint sampling and initial inspection;

[0074] Obtain the length of the available time interval for the corresponding calibration equipment in the joint sampling inspection and the first inspection;

[0075] According to the total processing time and the length of the available time interval, the utilization rate of the verification equipment L is calculated. 2,t ;

[0076]

[0077] In the formula, U represents the total processing time of the equipment for the material v of type at time t; max,v,t -U min,v,t L is the length of the available time range of the calibration equipment at time t. 2,t It measures the utilization balance of the calibration equipment. By minimizing the square of the difference between this item and the length of the equipment's available time range, the utilization of the equipment at different times can be made more balanced.

[0078] Specifically, the power material circulation efficiency in the joint random inspection and the first inspection obtained according to the random inspection and the first inspection mathematical model includes:

[0079] Obtain the inspection speed of power materials from the pending inspection status to the inspected status during joint random inspection and first inspection;

[0080] Obtain the average speed of circulation between power materials in joint sampling and initial inspection;

[0081] The power material circulation efficiency L is calculated based on the detection speed, average speed and the preset power material weight factors. 3,t ; Assume that the speed at which the material changes from the waiting state to the inspected state is z i,t For the material sequence that needs joint sampling and initial inspection, such as material x i,t and i,t , L 3,t It represents the efficiency of material circulation:

[0082]

[0083] Among them, α i,j,tis the weight coefficient of power materials, which depends on factors such as the type and importance of the materials; Indicates power supplies x j,t To power supplies i,t The average speed of the flow process; Indicates power supplies x j,t and power supplies i,t The absolute value of the difference between the first inspection end time and the second inspection end time.

[0084] The goal is to shorten the time spent in adjacent links in the circulation of electric power materials as much as possible and improve the overall efficiency of material circulation.

[0085] Specifically, the stability of the first inspection time in the joint random inspection and the first inspection obtained according to the random inspection and the first inspection mathematical model includes:

[0086] Get the time difference between the first inspection end times of the same power material in the first inspection;

[0087] According to the time difference and the preset stability weight coefficient, the first inspection time stability L is calculated. 4,t ;

[0088]

[0089] Among them, β is the stability weight coefficient; The absolute value of the time difference between the first inspection end times of the same power material in the first inspection. The first inspection time stability measures the stability of the first inspection end time of the same material at different time points, ensuring that the verification process will not be confused due to time fluctuations.

[0090] Step S03, obtaining an optimization objective function for the verification of electric power materials according to the total first-inspection time delay, verification equipment utilization rate, electric power material circulation efficiency and first-inspection time stability;

[0091] The calculation formula of the optimization objective function is as follows:

[0092]

[0093] Among them, k1, k2, k3, and k4 are weight coefficients corresponding to the four departmental factors of total first inspection time delay, calibration equipment utilization, power material circulation efficiency, and first inspection time stability, and t traverses all considered time points.

[0094] Step S04: According to the joint sampling and first inspection process of power materials, the constraint conditions of the optimization objective function are constructed, including material priority constraints, time interval constraints and equipment load constraints;

[0095] (I) Material priority constraint: For any two batches of power materials U in the power material set iand U j , if the power material U i The importance coefficient e i Greater than power supplies j The importance coefficient e j , then in resource allocation, priority should be given to power materials U i Perform the first check, that is, when resource competition occurs, the following conditions are met:

[0096]

[0097] Material priority constraints ensure that materials with high importance are inspected first to reduce potential risks to the power system.

[0098] (II) Time interval constraint: For material U i , the interval between the first inspection start time and the arrival time cannot exceed a preset time threshold T threshold ,Right now:

[0099]

[0100] The time interval constraint ensures that the materials are first inspected within a reasonable time frame after arrival, avoiding the timely commissioning of power materials due to excessive waiting time.

[0101] (III) Equipment load constraint: For each test equipment, the total test time of the power materials processed within a specific time t cannot exceed its maximum load capacity L max . Set power materials U i The calibration time on the calibration equipment is d i.t , then for any calibration device E in the calibration device set k ,satisfy:

[0102]

[0103] Where S k ,t means that it is allocated to device E at time t k The electrical materials to be tested are gathered together to ensure that the quality and efficiency of the testing equipment will not be affected by excessive load.

[0104] Step S05: Solve the optimization objective function according to the constraint conditions to obtain the power material verification strategy for joint random inspection and first inspection.

[0105] Optimize and solve the optimization objective function L:

[0106]

[0107] This process can be done using the ant colony algorithm, and its basic steps are as follows:

[0108] (1) Initialization: Determine the particle swarm size N and randomly generate the initial position X of the particles i and speed V i , set the individual optimal position of each particle as its current position, and find the initial global optimal position.

[0109] (2) Iterative update: For each particle, update the velocity and position. The velocity update formula is:

[0110]

[0111] The position update formula is:

[0112]

[0113] Then the objective function value of the new position of the particle is calculated, and the individual optimal position and the global optimal position are updated.

[0114] Determine the termination condition: Check whether the maximum number of iterations is reached or the objective function value is small enough. If so, output the global optimal position; otherwise, continue iterating.

[0115] By solving the optimization objective function, the power material verification strategy for joint random inspection and first inspection can be obtained.

[0116] The present invention provides a method for testing power materials by combining random inspection and first inspection, which takes into account resource constraints, priority differences and uncertainty factors. When formulating the testing strategy, not only the basic principles of joint random inspection and first inspection are followed, but also the following factors are comprehensively considered: (1) the collection and attributes of power materials, including the type of materials, arrival date, time required for testing and the importance coefficient in the testing, etc.; (2) the historical quality data, importance and arrival time distribution of different types of power materials, so as to determine the corresponding dynamic testing ratio; (3) the available time range of each testing equipment at different times and the efficiency parameters for processing different types of materials at different times; (4) the start time and end time of the first inspection of materials, and the impact of the end time of the first inspection of the previous material at a certain time on the first inspection of subsequent materials.

[0117] The present invention provides a method for testing electric power materials by combining random inspection and first inspection, and constructs a mathematical model for random inspection and first inspection of electric power materials; obtains the total first inspection time delay, testing equipment utilization, electric power material circulation efficiency and first inspection time stability in the random inspection and first inspection according to the mathematical model; obtains the optimization objective function of electric power material testing according to the total first inspection time delay, testing equipment utilization, electric power material circulation efficiency and first inspection time stability; constructs the constraint conditions of the optimization objective function according to the process of joint random inspection and first inspection of electric power materials, including material priority constraint, time interval constraint and equipment load constraint; solves the optimization objective function according to the constraint conditions, and obtains the verification strategy of electric power materials by combining random inspection and first inspection. The present invention not only follows the basic principles of joint random inspection and first inspection, but also comprehensively considers resource limitations, priority differences and uncertainty factors, and realizes a more reasonable and efficient verification scheme, thereby improving verification efficiency and accuracy, optimizing verification plans and reducing enterprise costs.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A method for testing electric power materials by combining random inspection and initial inspection, characterized in that: include: Construct mathematical models for random inspection and initial inspection of power materials; According to the mathematical model of random inspection and first inspection, the total first inspection time delay, the utilization rate of inspection equipment, the efficiency of power material circulation and the stability of first inspection time in the joint random inspection and first inspection are obtained; According to the total first inspection time delay, the utilization rate of the inspection equipment, the power material circulation efficiency and the first inspection time stability, the optimization objective function of the power material inspection is obtained; According to the joint sampling and initial inspection process of power materials, the constraint conditions of the optimization objective function are constructed; The optimization objective function is solved according to the constraint conditions to obtain the power material verification strategy for joint random inspection and first inspection.

2. A method for testing electric power materials by combined random inspection and initial inspection according to claim 1, characterized in that: The construction of the mathematical model for random inspection and initial inspection of power materials includes: Get the properties of power materials and build a collection of power materials; Extracting different types of power materials from the power material set according to a preset dynamic sampling ratio to obtain a sampling model; According to the sampling inspection model, the sampled power materials are tested and inspected to obtain the test results; According to the test results, the qualified power materials are selected for random inspection and a first inspection model is constructed.

3. A method for testing electric power materials by combined random inspection and initial inspection according to claim 2, characterized in that: The total first inspection time delay in the combined random inspection and first inspection is obtained according to the random inspection and first inspection mathematical model, including: According to the sampling inspection model, the importance coefficient and arrival time of power materials in the inspection are obtained; Obtain the end time of the first inspection of power materials according to the first inspection model; The total first inspection time delay is calculated based on the importance coefficient, arrival time and first inspection end time of power materials.

4. A method for testing electric power materials by combined random inspection and initial inspection according to claim 2, characterized in that: The utilization rate of the inspection equipment in the combined random inspection and the first inspection is obtained according to the random inspection and the first inspection mathematical model; Get the total processing time for verification and testing of different types of power materials in joint sampling and initial inspection; Obtain the length of the available time interval for the corresponding calibration equipment in the joint sampling inspection and the first inspection; The utilization rate of the testing equipment is calculated based on the total processing time and the length of the available time interval.

5. The method for testing electric power materials by combined random inspection and initial inspection according to claim 2 is characterized in that: The power material circulation efficiency in the joint random inspection and the first inspection obtained according to the random inspection and the first inspection mathematical model includes: Obtain the inspection speed of power materials from the pending inspection status to the inspected status during joint random inspection and first inspection; Obtain the average speed of circulation between power materials in joint sampling and initial inspection; The power material circulation efficiency is calculated based on the detection speed, average speed and preset weight factors of power materials.

6. A method for testing electric power materials by combining random inspection and initial inspection according to claim 2, characterized in that: The stability of the first inspection time in the combined random inspection and the first inspection obtained according to the random inspection and the first inspection mathematical model includes: Get the time difference between the first inspection end times of the same power material in the first inspection; The first inspection time stability is calculated based on the time difference and a preset stability weight coefficient.

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