A method and system for testing resistivity of insulating floor tiles

Abstract

The present invention discloses a resistivity test method and system for insulating floor tiles, which relates to the field of resistivity test technology. The method divides a substation into multiple test areas, calculates the dispersed anomaly coefficient of the test area based on the anomaly factors of several floor tiles under different humidity gradients, performs an overall resistivity test on the floor tiles in the test area, obtains the overall anomaly coefficient of the floor tiles based on the test results, generates a resistivity score for the test area in combination with the dispersed anomaly coefficient and the overall anomaly coefficient, and generates a management strategy for the insulating floor tiles of the substation based on the resistivity score. The test system comprehensively evaluates the insulation performance of the floor tiles by testing under different humidity gradients, ensures that the data covers a variety of actual operating conditions, and makes the test results more consistent with possible changes in the substation environment, which not only improves the detection efficiency, but also can more quickly discover the test area with problems, which is conducive to preventing risks in advance.

Description

Technical Field

[0001] The present invention relates to the technical field of resistivity testing, and in particular to a resistivity testing method and system for insulating floor tiles. Background Art

[0002] With the rapid development of the power industry, substations are an important part of the power system, and their operational safety and stability are crucial to the normal operation of the entire power system. Substations carry a large number of electrical equipment and transmission lines. The ultra-high current or ultra-high voltage carried in these equipment lines can easily cause dangers such as electric shock, local high temperature, and even fire. Therefore, in order to ensure the safe operation of substations, insulating floor tiles must be used to reduce these potential risks;

[0003] Substations are densely populated with electrical equipment, high voltage levels, and complex operating environments. Therefore, the electrical insulation performance of insulating floor tiles is crucial. By effectively testing the resistivity of floor tiles, it can be ensured that they meet safety standards, prevent current leakage and static electricity accumulation, and ensure the safe operation of substations and the personal safety of staff.

[0004] The prior art has the following deficiencies:

[0005] 1. The traditional resistivity test of insulating floor tiles is usually carried out under standard environmental conditions in the laboratory, or only under a single humidity condition. This method lacks consideration of humidity changes in the actual substation environment. Substations may experience different humidity and temperature changes. These factors will significantly affect the resistivity performance of floor tiles and increase the unreliability of detection.

[0006] 2. Traditional detection methods mainly focus on the overall average value of resistivity or individual abnormal points, but fail to conduct a detailed analysis of the resistivity changes in the area. Since floor tiles may have local abnormalities in different areas or humidity conditions, simply relying on the average value cannot identify these subtle but important abnormalities. The existing technology lacks the means to distinguish between scattered abnormalities and overall abnormalities, resulting in unscientific handling of local abnormalities and overall problems, and unable to evaluate whether the insulation between floor tiles in the local area is consistent. Summary of the invention

[0007] The purpose of the present invention is to provide a resistivity testing method and system for insulating floor tiles. By testing under different humidity gradients, the insulation performance of floor tiles can be comprehensively evaluated to ensure that the data covers a variety of actual operating conditions, so that the test results are more in line with possible changes in the substation environment. This not only improves the detection efficiency, but also can more quickly discover test areas with problems, which is conducive to preventing risks in advance.

[0008] In order to achieve the above object, the present invention provides the following technical solution: a method for testing the resistivity of insulating floor tiles, the testing method comprising the following steps:

[0009] The test system divides the substation into multiple test areas based on the substation information. Under different humidity gradients, it randomly selects several floor tiles in the test area for resistivity testing. After obtaining the test results of the floor tiles under different humidity gradients, it generates abnormal factors for the floor tiles.

[0010] The dispersion anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles, and the overall resistivity of the floor tiles in the test area is tested under different humidity gradients. The overall anomaly coefficient of the floor tiles is obtained based on the test results, and the resistivity score is generated for the test area by combining the dispersion anomaly coefficient and the overall anomaly coefficient.

[0011] After marking the test areas with resistivity scores less than the score threshold with warning signs, the test areas marked with warning signs need to be managed immediately, and the remaining test areas are sorted according to the resistivity scores to generate a management list. After regularly analyzing the resistivity scores of all test areas, it is determined whether the substation needs to be managed. If management is required, the management order of the test areas is selected according to the management list.

[0012] In a preferred embodiment, a number of floor tiles in a test area are randomly selected to perform resistivity tests under different humidity gradients. After obtaining the test results of the floor tiles under different humidity gradients, an abnormal factor is generated for the floor tiles, including the following steps:

[0013] Obtain the real-time resistivity of the floor tiles tested at multiple time points under current humidity conditions, calculate the average resistivity and resistivity standard deviation based on the real-time resistivity, and obtain the resistivity deviation by subtracting the average resistivity from the standard resistivity;

[0014] The resistivity deviation and resistivity standard deviation are normalized so that the value range of the processed resistivity deviation and resistivity standard deviation is mapped to [0,1];

[0015] The resistivity deviation and resistivity standard deviation after normalization are summed to obtain the abnormal value of the floor tile under the current humidity condition, and the abnormal value under all humidity conditions is summed to obtain the abnormal factor of the floor tile.

[0016] In a preferred embodiment, the dispersion anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles, comprising the following steps:

[0017] After obtaining the anomaly factors of several randomly selected floor tiles in the test area, the weighted sum of the anomaly factors of all floor tiles is used to obtain the scattered anomaly coefficient of the test area. The expression is:

[0018] , where is the dispersion anomaly coefficient, is the number of randomly selected floor tiles, For the The abnormal factor of a floor tile, For the The weight of a floor tile.

[0019] In a preferred embodiment, the overall resistivity test of the floor tiles is performed on the test area under different humidity gradients, and the overall abnormal coefficient of the floor tiles is obtained based on the test results, including the following steps:

[0020] Under the current humidity conditions, the overall resistivity of the test area is measured at multiple time points. When the test starts, the equipment is turned on and a voltage is applied between the electrodes. The real-time overall resistivity value is calculated by measuring the current response of the entire area.

[0021] The average overall resistivity and the overall resistivity standard deviation are calculated based on the real-time overall resistivity value, and the overall resistivity deviation is obtained by subtracting the average overall resistivity from the standard overall resistivity. The overall resistivity deviation and the overall resistivity standard deviation are normalized so that the value range of the processed overall resistivity deviation and the overall resistivity standard deviation is mapped to [0,1];

[0022] The overall resistivity deviation and the overall resistivity standard deviation after normalization are summed to obtain the overall anomaly coefficient of the test area under the current humidity conditions, and the overall anomaly values ​​under all humidity conditions are summed to obtain the overall anomaly coefficient.

[0023] In a preferred embodiment, generating a resistivity score for a test area by combining the scattered anomaly coefficient with the overall anomaly coefficient comprises the following steps:

[0024] After obtaining the scattered anomaly coefficient and the overall anomaly coefficient of the test area, the resistivity score is obtained by comprehensive calculation. The expression is: , where Score the resistivity, is the dispersion anomaly coefficient, is the overall abnormal coefficient, , are the adjustment indexes of the scattered anomaly coefficient and the overall anomaly coefficient, respectively, and , All are greater than 0;

[0025] The resistivity score is compared with the preset score threshold. The score threshold is used to determine whether the overall resistivity test of the test area meets the standard. If the resistivity score is less than the score threshold, the overall resistivity test of the test area is judged to be unsatisfactory, and a warning mark is placed on the test area. If the resistivity score is greater than or equal to the score threshold, the overall resistivity test of the test area is judged to meet the standard.

[0026] In a preferred embodiment, the remaining test areas are sorted according to the resistivity scores, a management list is generated, and after the resistivity scores of all test areas are regularly analyzed, it is determined whether the substation needs to be managed, including the following steps:

[0027] After deleting the test areas with resistivity scores less than the score threshold, the remaining test areas are sorted from small to large according to the resistivity scores to generate a management list;

[0028] After obtaining the resistivity scores of all test areas at regular intervals, calculate the mean resistivity score of each test area, and calculate the impact weight of the test area based on the number of equipment in the test area and the number of historical equipment failures in the test area;

[0029] The influence weights of all test areas are summed with the mean resistivity scores periodically to obtain the substation management index, which is expressed as: , where is the management index, For the The impact weight of each test area, For the The average resistivity score of the test area;

[0030] The obtained management index is compared with the preset management threshold, and the management threshold is used to determine whether the substation needs to be managed in advance;

[0031] If the management index is greater than or equal to the management threshold, it is determined that there is no need to manage the substation in advance. If the management index is less than the management threshold, it is determined that the substation needs to be managed in advance. At this time, the management order of the test area is selected according to the positive order of the management list.

[0032] In a preferred embodiment, the logic for obtaining the impact weight is: obtain the number of devices and the historical number of device failures in the test area, normalize the number of devices and the historical number of device failures, sum the normalized number of devices and the historical number of device failures to obtain the impact value, sum the impact values ​​of all test areas to obtain the total impact value, and divide the impact value by the total impact value to obtain the impact weight of each test area.

[0033] An insulating floor tile resistivity testing system includes a region division module, a testing module, and a management module;

[0034] Area division module: divide the substation into multiple test areas based on substation information;

[0035] Test module: Under different humidity gradients, several floor tiles in the test area are randomly selected for resistivity test. After obtaining the test results of the floor tiles under different humidity gradients, anomaly factors are generated for the floor tiles. The scattered anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles. Under different humidity gradients, the overall resistivity of the floor tiles in the test area is tested, and the overall anomaly coefficient of the floor tiles is obtained based on the test results.

[0036] Management module: Combine the scattered anomaly coefficient and the overall anomaly coefficient to generate a resistivity score for the test area. After marking the test area with a resistivity score less than the score threshold with a warning mark, the test area marked with the warning mark needs to be managed immediately. The remaining test areas are sorted according to the resistivity score and a management list is generated. After regularly analyzing the resistivity scores of all test areas, it is determined whether the substation needs to be managed. If management is required, the management order of the test areas is selected according to the management list.

[0037] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0038] The present invention divides the substation into multiple test areas, calculates the scattered anomaly coefficient of the test area based on the anomaly factors of several floor tiles under different humidity gradients, performs an overall resistivity test on the floor tiles in the test area, obtains the overall anomaly coefficient of the floor tiles based on the test results, generates a resistivity score for the test area in combination with the scattered anomaly coefficient and the overall anomaly coefficient, and generates a management strategy for the insulating floor tiles of the substation based on the resistivity score. The test system comprehensively evaluates the insulation performance of the floor tiles by testing under different humidity gradients, ensures that the data covers a variety of actual operating conditions, and makes the test results more consistent with possible changes in the substation environment, which not only improves the detection efficiency, but also can more quickly discover the test areas with problems, which is conducive to preventing risks in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0040] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0042] Example 1: Please refer to Figure 1 As shown, the resistivity test method of an insulating floor tile described in this embodiment includes the following steps:

[0043] The test system divides the substation into multiple test areas based on the substation information, randomly selects several floor tiles in the test area for resistivity test under different humidity gradients, generates abnormal factors for the floor tiles after obtaining the test results of the floor tiles under different humidity gradients, calculates the dispersion abnormal coefficient of the test area based on the abnormal factors of several floor tiles, and performs overall resistivity test on the floor tiles in the test area under different humidity gradients, obtains the overall abnormal coefficient of the floor tiles based on the test results, generates resistivity scores for the test area by combining the dispersion abnormal coefficient and the overall abnormal coefficient, marks the test area with a resistivity score less than the score threshold with a warning mark, and the test area with the warning mark needs to be managed immediately, sorts the remaining test areas according to the resistivity score, generates a management list, and regularly analyzes the resistivity scores of all test areas to determine whether the substation needs to be managed. If management is required, the management order of the test areas is selected according to the management list.

[0044] This application divides the substation into multiple test areas, calculates the dispersed anomaly coefficient of the test area based on the anomaly factors of several floor tiles under different humidity gradients, conducts an overall resistivity test on the floor tiles in the test area, obtains the overall anomaly coefficient of the floor tiles based on the test results, generates a resistivity score for the test area by combining the dispersed anomaly coefficient and the overall anomaly coefficient, and generates a management strategy for the insulated floor tiles of the substation based on the resistivity score. The test system conducts tests under different humidity gradients to comprehensively evaluate the insulation performance of floor tiles, ensure that the data covers a variety of actual operating conditions, and make the test results more consistent with possible changes in the substation environment. This not only improves the detection efficiency, but also can more quickly discover test areas with problems, which is conducive to preventing risks in advance.

[0045] Embodiment 2: The test system divides the substation into multiple test areas according to the substation information, including the following steps:

[0046] Step description: Extract the location information, equipment type and layout of all equipment from the substation management system or database. Ensure that the collected information accurately reflects the actual distribution of equipment in the substation.

[0047] Objective: To provide comprehensive and accurate equipment location and distribution data for subsequent segmentation.

[0048] Step description: Calculate the device density of each area based on the device location information. The density can be measured by counting the number of devices per unit area. Analyze the density of different areas in the substation as the main basis for dividing the test area.

[0049] Goal: Identify areas with high density of devices and prioritize these areas as independent testing areas to ensure detection accuracy.

[0050] Step description: Divide the floor according to the distribution of different types of equipment (such as transformers, switchgear, circuit breakers, etc.) in the substation. If some equipment has higher requirements for floor insulation performance, a separate test area can be divided; other equipment with similar density can be combined into one area.

[0051] Objective: To ensure that insulation performance requirements for different equipment types are met to facilitate more targeted resistivity testing.

[0052] Step description: Divide the substation into multiple test areas according to the equipment density and type distribution. When dividing the boundaries, the dense equipment area can be used as an independent test area, and the areas with more dispersed equipment can be merged into a larger test area.

[0053] Objective: To separate areas with densely populated equipment for subsequent focused monitoring.

[0054] Step description: Assign a unique identifier to each divided test area, record the type and quantity of main equipment in each area, and update this information in the substation management system to quickly locate the area during subsequent tests.

[0055] Objective: To ensure that the information of the divided test areas is clearly recorded to facilitate subsequent testing and data analysis.

[0056] Assume that there is a substation containing different types of equipment, distributed as follows:

[0057] Equipment types include: transformers, high voltage switchgear, circuit breakers and grounding equipment.

[0058] The substation is divided into three main areas: Area A, Area B and Area C, and the equipment distribution density in each area is different.

[0059] Get the location information and type data of all devices from the substation system. Assume the data is as follows:

[0060] Area A: 4 transformers, 2 grounding devices;

[0061] Area B: 6 high-voltage switchgears, 3 circuit breakers;

[0062] Area C: 5 grounding devices, 1 transformer;

[0063] Determine the equipment density in each area based on the number and layout of equipment.

[0064] The density of area A is relatively high, and the number of equipment is relatively concentrated, especially the transformers and grounding equipment are arranged close to each other.

[0065] Area B has the highest equipment density, especially high-voltage switchgear and circuit breakers, which are more concentrated.

[0066] The equipment in Area C is relatively small and scattered, mainly grounding equipment and a small number of transformers.

[0067] Analysis of the main types of equipment in each region by equipment type:

[0068] Zone A: Mainly includes transformers and is an area with high insulation requirements.

[0069] Area B: Mainly high-voltage switchgear and circuit breakers, which also have high insulation requirements and are densely populated.

[0070] Zone C: Mainly grounding equipment, with relatively low insulation requirements.

[0071] The regions are further divided based on density and equipment type:

[0072] Area A is divided into two test areas: A1 (transformer-intensive area) and A2 (grounding equipment area), which test the floor resistivity under different equipment types respectively.

[0073] Area B is divided into an independent test area B1 because the equipment is compactly distributed and has high insulation requirements.

[0074] Area C is relatively scattered, and the entire area C is used as a test area C1 to test the insulation requirements of grounding equipment.

[0075] Mark each divided area and record relevant information:

[0076] A1: 4 transformers densely populated area;

[0077] A2: 2 grounded equipment areas;

[0078] B1: a dense area of ​​6 high-voltage switchgears and 3 circuit breakers;

[0079] C1: Decentralized grounded equipment area.

[0080] Under different humidity gradients, several floor tiles in the test area are randomly selected for resistivity testing. After obtaining the test results of the floor tiles under different humidity gradients, an abnormal factor is generated for the floor tiles, including the following steps:

[0081] Before the test, set multiple humidity gradients (such as 20%, 40%, 60%, 80%, etc.) according to the environmental conditions of the substation and the possible humidity variation range. The setting of humidity gradients should cover the humidity range that the substation may encounter in different climates or seasons as much as possible to ensure the comprehensiveness of the test.

[0082] At each humidity gradient, randomly select several floor tiles from the test area as samples. The random number generation method can be used to select the sample location to avoid bias caused by human factors. Ensure that the floor tiles in each area have the possibility of being selected to increase the representativeness of the test.

[0083] The real-time resistivity of the floor tiles tested at multiple time points under the current humidity conditions is obtained, the average resistivity and the resistivity standard deviation are calculated based on the real-time resistivity, the resistivity deviation is obtained by subtracting the average resistivity from the standard resistivity, the resistivity deviation and the resistivity standard deviation are normalized, and the value range of the processed resistivity deviation and the resistivity standard deviation is mapped to [0,1], the resistivity deviation and the resistivity standard deviation after normalization are summed to obtain the abnormal value of the floor tiles under the current humidity conditions, and the abnormal value under all humidity conditions is summed to obtain the abnormal factor of the floor tiles.

[0084] The scattered anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles, including the following steps:

[0085] After obtaining the anomaly factors of several randomly selected floor tiles in the test area, the weighted sum of the anomaly factors of all floor tiles is used to obtain the scattered anomaly coefficient of the test area. The expression is:

[0086] , where is the dispersion anomaly coefficient, is the number of randomly selected floor tiles, For the The abnormal factor of a floor tile, For the The weight of a floor tile.

[0087] Under different humidity gradients, the overall resistivity of the floor tiles in the test area is tested, and the overall abnormal coefficient of the floor tiles is obtained based on the test results, including the following steps:

[0088] According to the climate and humidity variation range of the test environment, multiple humidity gradients (such as 20%, 40%, 60%, 80%, etc.) are set to ensure that the humidity gradient covers the actual possible humidity range of the substation.

[0089] An overall resistivity test device is arranged in each test area, which usually covers the entire area and contacts the surface of the floor tiles through electrode plates at both ends.

[0090] Under the current humidity conditions, the overall resistivity of the test area is measured at multiple time points. When the test starts, the equipment is started and a voltage is applied between the electrodes. The real-time overall resistivity value is calculated by measuring the current response of the entire area. The average overall resistivity and the overall resistivity standard deviation are calculated based on the real-time overall resistivity value. The overall resistivity deviation is obtained by subtracting the average overall resistivity from the standard overall resistivity. The overall resistivity deviation and the overall resistivity standard deviation are normalized so that the value range of the processed overall resistivity deviation and the overall resistivity standard deviation is mapped to [0,1]. The overall resistivity deviation and the overall resistivity standard deviation after normalization are summed to obtain the overall anomaly value of the test area under the current humidity conditions. The overall anomaly values ​​under all humidity conditions are summed to obtain the overall anomaly coefficient.

[0091] A resistivity score is generated for the test area by combining the scattered anomaly coefficient and the overall anomaly coefficient. After a warning mark is placed on the test area where the resistivity score is less than the score threshold, the test area marked with the warning mark needs to be managed immediately, including the following steps:

[0092] After obtaining the scattered anomaly coefficient and the overall anomaly coefficient of the test area, the resistivity score is obtained by comprehensive calculation. The expression is: , where Score the resistivity, is the dispersion anomaly coefficient, is the overall abnormal coefficient, , are the adjustment indexes of the scattered anomaly coefficient and the overall anomaly coefficient, respectively, and , All are greater than 0;

[0093] The larger the resistivity score, the more the overall resistivity test of the test area meets the standard. The resistivity score is compared with the preset scoring threshold. The scoring threshold is used to determine whether the overall resistivity test of the test area meets the standard. If the resistivity score is less than the scoring threshold, the overall resistivity test of the test area is judged to be unsatisfactory, and a warning mark is placed on the test area. If the resistivity score is greater than or equal to the scoring threshold, the overall resistivity test of the test area is judged to meet the standard.

[0094] The remaining test areas are sorted according to the resistivity scores to generate a management list. After regularly analyzing the resistivity scores of all test areas, it is determined whether the substation needs to be managed. If management is required, the management order of the test areas is selected according to the management list, including the following steps:

[0095] After deleting the test areas with resistivity scores less than the score threshold, the remaining test areas are sorted from small to large according to the resistivity scores to generate a management list;

[0096] After periodically obtaining the resistivity scores of all test areas, calculate the mean resistivity score of each test area (the test area is tested for resistivity once every certain period of time, so there will be multiple resistivity scores), and calculate the impact weight of the test area based on the number of devices in the test area and the number of historical device failures in the test area. The logic for obtaining the impact weight is as follows: obtain the number of devices and the number of historical device failures in the test area, normalize the number of devices and the number of historical device failures, sum the normalized number of devices and the number of historical device failures to obtain the impact value, sum the impact values ​​of all test areas to obtain the total impact value, and divide the impact value by the total impact value to obtain the impact weight of each test area;

[0097] The management index of the substation is obtained by periodically summing the impact weights of all test areas and the mean resistivity scores, which is expressed as: , where is the management index, For the The impact weight of each test area, For the The average resistivity score of the test area;

[0098] The smaller the value of the substation management index is, the more it indicates that the substation needs to be managed in advance. The obtained management index is compared with the preset management threshold. The management threshold is used to determine whether the substation needs to be managed in advance. If the management index is greater than or equal to the management threshold, it is determined that the substation does not need to be managed in advance. If the management index is less than the management threshold, it is determined that the substation needs to be managed in advance. At this time, the management order of the test area is selected according to the positive order of the management list.

[0099] Embodiment 3: The insulating floor tile resistivity testing system described in this embodiment includes a region division module, a testing module, and a management module;

[0100] Area division module: divides the substation into multiple test areas according to the substation information, and sends the test area division results to the test module and the management module;

[0101] Test module: Under different humidity gradients, several floor tiles in the test area are randomly selected for resistivity test. After obtaining the test results of the floor tiles under different humidity gradients, anomaly factors are generated for the floor tiles. The dispersed anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles. Under different humidity gradients, the overall resistivity of the floor tiles in the test area is tested. The overall anomaly coefficient of the floor tiles is obtained based on the test results. The dispersed anomaly coefficient and the overall anomaly coefficient are sent to the management module.

[0102] Management module: Combine the scattered anomaly coefficient and the overall anomaly coefficient to generate a resistivity score for the test area. After marking the test area with a resistivity score less than the score threshold with a warning mark, the test area marked with the warning mark needs to be managed immediately. The remaining test areas are sorted according to the resistivity score and a management list is generated. After regularly analyzing the resistivity scores of all test areas, it is determined whether the substation needs to be managed. If management is required, the management order of the test areas is selected according to the management list.

[0103] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0104] It should be understood that the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship, but it may also indicate an "and / or" relationship. Please refer to the context for specific understanding.

[0105] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0106] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0107] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for testing the resistivity of insulating floor tiles, characterized in that: The test method comprises the following steps: The test system divides the substation into multiple test areas based on the substation information. Under different humidity gradients, it randomly selects several floor tiles in the test area for resistivity testing. After obtaining the test results of the floor tiles under different humidity gradients, it generates abnormal factors for the floor tiles. The dispersion anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles, and the overall resistivity of the floor tiles in the test area is tested under different humidity gradients. The overall anomaly coefficient of the floor tiles is obtained based on the test results, and the resistivity score is generated for the test area by combining the dispersion anomaly coefficient and the overall anomaly coefficient. After marking the test area with a resistivity score less than the score threshold with a warning mark, the test area with the warning mark needs to be managed immediately, and the remaining test areas are sorted according to the resistivity score to generate a management list. After regularly analyzing the resistivity scores of all test areas, it is determined whether the substation needs to be managed. If management is required, the management order of the test areas is selected according to the management list; Under different humidity gradients, several floor tiles in the test area are randomly selected for resistivity testing. After obtaining the test results of the floor tiles under different humidity gradients, an abnormal factor is generated for the floor tiles, including the following steps: Obtain the real-time resistivity of the floor tiles tested at multiple time points under current humidity conditions, calculate the average resistivity and resistivity standard deviation based on the real-time resistivity, and obtain the resistivity deviation by subtracting the average resistivity from the standard resistivity; The resistivity deviation and resistivity standard deviation are normalized so that the value range of the processed resistivity deviation and resistivity standard deviation is mapped to [0,1]; The resistivity deviation and resistivity standard deviation after normalization are summed to obtain the abnormal value of the floor tile under the current humidity condition, and the abnormal value under all humidity conditions is summed to obtain the abnormal factor of the floor tile.

2. The resistivity testing method of insulating floor tiles according to claim 1, characterized in that: The scattered anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles, including the following steps: After obtaining the anomaly factors of several randomly selected floor tiles in the test area, the weighted sum of the anomaly factors of all floor tiles is used to obtain the scattered anomaly coefficient of the test area. The expression is: , where is the dispersion anomaly coefficient, is the number of randomly selected floor tiles, For the The abnormal factor of a floor tile, For the The weight of a floor tile.

3. A method for testing resistivity of insulating floor tiles according to claim 2, characterized in that: Under different humidity gradients, the overall resistivity of the floor tiles in the test area is tested, and the overall abnormal coefficient of the floor tiles is obtained based on the test results, including the following steps: Under the current humidity conditions, the overall resistivity of the test area is measured at multiple time points. When the test starts, the equipment is turned on and a voltage is applied between the electrodes. The real-time overall resistivity value is calculated by measuring the current response of the entire area. The average overall resistivity and the overall resistivity standard deviation are calculated based on the real-time overall resistivity value, and the overall resistivity deviation is obtained by subtracting the average overall resistivity from the standard overall resistivity. The overall resistivity deviation and the overall resistivity standard deviation are normalized so that the value range of the processed overall resistivity deviation and the overall resistivity standard deviation is mapped to [0,1]; The overall resistivity deviation and the overall resistivity standard deviation after normalization are summed to obtain the overall anomaly coefficient of the test area under the current humidity conditions, and the overall anomaly values ​​under all humidity conditions are summed to obtain the overall anomaly coefficient.

4. A method for testing resistivity of insulating floor tiles according to claim 3, characterized in that: Combining the scattered anomaly coefficient with the overall anomaly coefficient to generate a resistivity score for the test area includes the following steps: After obtaining the scattered anomaly coefficient and the overall anomaly coefficient of the test area, the resistivity score is obtained by comprehensive calculation. The expression is: , where Score the resistivity, is the dispersion anomaly coefficient, is the overall abnormal coefficient, , are the adjustment indexes of the scattered anomaly coefficient and the overall anomaly coefficient, respectively, and , All are greater than 0; The resistivity score is compared with the preset score threshold. The score threshold is used to determine whether the overall resistivity test of the test area meets the standard. If the resistivity score is less than the score threshold, the overall resistivity test of the test area is judged to be unsatisfactory, and a warning mark is placed on the test area. If the resistivity score is greater than or equal to the score threshold, the overall resistivity test of the test area is judged to meet the standard.

5. The method for testing resistivity of insulating floor tiles according to claim 4, characterized in that: The remaining test areas are sorted according to the resistivity scores, and a management list is generated. After the resistivity scores of all test areas are regularly analyzed, it is determined whether the substation needs to be managed, including the following steps: After deleting the test areas with resistivity scores less than the score threshold, the remaining test areas are sorted from small to large according to the resistivity scores to generate a management list; After obtaining the resistivity scores of all test areas at regular intervals, calculate the mean resistivity score of each test area, and calculate the impact weight of the test area based on the number of equipment in the test area and the number of historical equipment failures in the test area; The influence weights of all test areas are summed with the mean resistivity scores periodically to obtain the substation management index, which is expressed as: , where is the management index, For the The impact weight of each test area, For the The average resistivity score of the test area; The obtained management index is compared with the preset management threshold, and the management threshold is used to determine whether the substation needs to be managed in advance; If the management index is greater than or equal to the management threshold, it is determined that there is no need to manage the substation in advance. If the management index is less than the management threshold, it is determined that the substation needs to be managed in advance. At this time, the management order of the test area is selected according to the positive order of the management list.

6. A method for testing resistivity of insulating floor tiles according to claim 5, characterized in that: The logic for obtaining the impact weight is as follows: obtain the number of devices and the number of historical device failures in the test area, normalize the number of devices and the number of historical device failures, sum the normalized number of devices and the number of historical device failures to obtain the impact value, sum the impact values ​​of all test areas to obtain the total impact value, and divide the impact value by the total impact value to obtain the impact weight of each test area.

7. An insulating floor tile resistivity testing system, used to implement the testing method according to any one of claims 1 to 6, characterized in that: Including area division module, test module and management module; Area division module: divide the substation into multiple test areas based on substation information; Test module: Under different humidity gradients, several floor tiles in the test area are randomly selected for resistivity test. After obtaining the test results of the floor tiles under different humidity gradients, anomaly factors are generated for the floor tiles. The scattered anomaly coefficient of the test area is calculated based on the anomaly factors of several floor tiles. Under different humidity gradients, the overall resistivity of the floor tiles in the test area is tested, and the overall anomaly coefficient of the floor tiles is obtained based on the test results. Management module: Combine the scattered anomaly coefficient and the overall anomaly coefficient to generate a resistivity score for the test area. After marking the test area with a resistivity score less than the score threshold with a warning mark, the test area marked with the warning mark needs to be managed immediately. The remaining test areas are sorted according to the resistivity score and a management list is generated. After regularly analyzing the resistivity scores of all test areas, it is determined whether the substation needs to be managed. If management is required, the management order of the test areas is selected according to the management list.

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