A method, device and system for measuring the grounding resistance of a power tower

Abstract

The application discloses a kind of electric power tower grounding resistance measurement method, device and system, it is related to electric power system detection technical field, can solve the problem of eliminating the disturbance of soil environment transient fluctuation to grounding resistance field measurement value, obtain more close to the resistance measurement result of real steady state of grounding device, including: obtaining the real-time grounding resistance measurement value of target electric power tower and the real-time soil environment parameter of the measurement area where it is located;According to real-time soil environment parameter, and the historical grounding resistance measurement value of multiple reference electric power towers in measurement area in preset period and corresponding historical soil environment parameter, determine the environmental correction factor of target electric power tower under current measurement;According to environmental correction factor, the real-time grounding resistance measurement value is corrected, and the real-time grounding resistance correction value of target electric power tower is obtained;According to real-time grounding resistance correction value and preset safety threshold, the grounding state of target electric power tower is early warned.

Description

Technical Field

[0001] This invention relates to the field of power system testing technology, specifically to a method, device, and system for measuring the grounding resistance of power transmission towers. Background Technology

[0002] Grounding resistance is a key parameter for evaluating the performance of power tower grounding systems and ensuring the lightning protection and safe operation of transmission lines. Its accurate measurement is crucial for the stable operation and maintenance of the power grid. Currently, grounding resistance is typically measured directly at the tower site using specialized instruments. This method relies on instantaneous electrical signals at the moment of measurement. However, the soil environment at the site, especially its temperature and humidity, is not constant; it fluctuates dynamically with weather, seasons, and other factors, directly affecting soil resistivity and causing corresponding changes in the measured grounding resistance. While existing measurement technologies can obtain real-time readings, they do not systematically consider or compensate for this measurement bias introduced by environmental fluctuations. This results in inconsistent and incomparable measurement results obtained at different times and under different environmental conditions, making it difficult to accurately reflect the inherent and stable electrical characteristics of the grounding device. This introduces uncertainty into the accurate assessment of the tower's safety status and maintenance decisions based on measurement results. Summary of the Invention

[0003] To address the technical problem of eliminating the interference of instantaneous fluctuations in the soil environment on the field measurement of grounding resistance and obtaining resistance measurement results that more closely approximate the true stable state of the grounding device, the present invention aims to provide a method, device, and system for measuring the grounding resistance of power transmission towers. The specific technical solution adopted is as follows: In a first aspect, the present invention provides a method for measuring the grounding resistance of a power transmission tower, comprising: acquiring the real-time grounding resistance measurement value of a target power transmission tower and the real-time soil environmental parameters of the measurement area; determining an environmental correction factor for the target power transmission tower under the current measurement based on the real-time soil environmental parameters and the historical grounding resistance measurement values ​​and corresponding historical soil environmental parameters of multiple reference power transmission towers in the measurement area within a preset time period; correcting the real-time grounding resistance measurement value based on the environmental correction factor to obtain a corrected real-time grounding resistance value for the target power transmission tower; and issuing an early warning for the grounding status of the target power transmission tower based on the corrected real-time grounding resistance value and a preset safety threshold.

[0004] Secondly, the present invention provides a power tower grounding resistance measurement system, comprising: a data acquisition module, a correction factor calculation module, a resistance value correction module, and an early warning module; the data acquisition module is used to acquire the real-time grounding resistance measurement value of the target power tower and the real-time soil environmental parameters of the measurement area; the correction factor calculation module is used to determine the environmental correction factor of the target power tower under the current measurement based on the real-time soil environmental parameters and the historical grounding resistance measurement values ​​and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period; the resistance value correction module is used to correct the real-time grounding resistance measurement value according to the environmental correction factor to obtain the real-time grounding resistance correction value of the target power tower; and the early warning module is used to issue an early warning on the grounding status of the target power tower based on the real-time grounding resistance correction value and a preset safety threshold.

[0005] Thirdly, the present invention provides a power tower grounding resistance measuring device, comprising: a processor and a memory; wherein the memory is used to store one or more programs, the one or more programs including computer execution instructions, and when the power tower grounding resistance measuring device is running, the processor executes the computer execution instructions stored in the memory to cause the power tower grounding resistance measuring device to perform the power tower grounding resistance measuring method as described in the first aspect and any possible implementation thereof.

[0006] The present invention has the following beneficial effects: by introducing an environmental correction factor to dynamically correct the original grounding resistance measurement value, the interference of instantaneous fluctuations in the soil environment on the measurement results is effectively suppressed, thereby obtaining a resistance value that is closer to the true stable state of the grounding device, significantly improving the measurement accuracy, consistency and comparability, and providing a more reliable data foundation for the safety status assessment and intelligent operation and maintenance of power towers. Attached Figure Description

[0007] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the architecture of a power tower grounding resistance measurement system provided in one embodiment of the present invention; Figure 2 This is a flowchart illustrating a method for measuring the grounding resistance of a power tower according to an embodiment of the present invention. Figure 3 This is one of the structural schematic diagrams of a power tower grounding resistance measuring device provided in an embodiment of the present invention; Figure 4 This is a second schematic diagram of a power tower grounding resistance measuring device provided in one embodiment of the present invention. Detailed Implementation

[0009] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the specific implementation methods, structures, features, and effects of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0010] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0011] In all division and logarithmic operations involved in this invention, a smoothing mechanism is employed to prevent computer program crashes or invalid values ​​from being generated due to a zero denominator or zero input. Specifically, a correction factor ε, which is a very small positive number, is superimposed on the denominator term of the division operation or the argument term of the logarithmic function, for example, a value of 10 to the power of negative 5, thereby ensuring the robustness and feasibility of the algorithm under extreme conditions.

[0012] Unless otherwise specified, the normalization function Norm() mentioned in this invention uses maximum and minimum value normalization. The maximum and minimum values ​​are preset empirical extreme values ​​derived from a large amount of historical experimental data. If the calculation result exceeds the [0, 1] interval, it is restricted to the [0, 1] range by a truncation function (i.e., if the result is less than 0, it is taken as 0; if it is greater than 1, it is taken as 1) to eliminate the influence of outliers on the evaluation index.

[0013] The following description, in conjunction with the accompanying drawings, details the specific scheme of the power tower grounding resistance measurement method, device, and system provided by the present invention.

[0014] For example, such as Figure 1 The diagram shown is a schematic representation of the architecture of a power tower grounding resistance measurement system (hereinafter referred to as measurement system 10) according to an embodiment of the present invention. The measurement system 10 includes: a data acquisition module 11, a correction factor calculation module 12, a resistance value correction module 13, and an early warning module 14. The modules are described in detail below: (1) Data acquisition module 11.

[0015] The data acquisition module 11 is responsible for collecting all the basic data required for performing ground resistance correction and early warning from the sensor network deployed on the target power tower and its measurement area, and organizing this data into formatted information that can be processed by the computing module.

[0016] Optionally, the data acquisition module 11 is used to acquire the real-time grounding resistance measurement value of the target power tower and the real-time soil environmental parameters of the measurement area.

[0017] Specifically, the data acquisition module 11 first directly reads the real-time grounding resistance measurement value of the target power tower by connecting to a high-precision grounding resistance tester or an intelligent sensor integrated into the grounding down conductor. Then, the data acquisition module 11 synchronously collects real-time soil environmental parameters, including soil temperature and soil moisture, by reading signals from soil temperature and soil moisture sensors deployed in the soil around the tower. The data acquisition module 11 timestamps and binds the aforementioned real-time measurements and parameters to form a real-time data packet, which is then sent to the correction factor calculation module 12.

[0018] Optionally, the data acquisition module 11 is also used to establish an analysis benchmark for the system before performing real-time measurements. Specifically, this includes selecting multiple power towers with consistent structures within the measurement area as reference power towers; and collecting historical grounding resistance measurements and corresponding historical soil environmental parameters for each reference power tower within a preset time period. The data acquisition module 11 cleans and normalizes this historical data to form a structured historical database, providing a data foundation for subsequent environmental impact analysis.

[0019] (2) Correction factor calculation module 12.

[0020] The correction factor calculation module 12 is responsible for receiving real-time data and historical databases from the data acquisition module 11, quantitatively analyzing the impact of soil environmental fluctuations on grounding resistance measurement through a series of models and algorithms, and finally synthesizing an environmental correction factor for correcting measurement deviations.

[0021] Optionally, the correction factor calculation module 12 is used to determine the environmental correction factor of the target power tower under the current measurement based on the real-time soil environmental parameters and the historical grounding resistance measurement values ​​and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period.

[0022] For example, the correction factor calculation module 12 can be further divided into a sensitivity analysis submodule 121, a consistency analysis submodule 122, and a factor synthesis submodule 123 to clearly and systematically complete the calculation process of the environmental correction factor. These will be described in detail below: (2.1) Sensitivity analysis submodule 121.

[0023] Optionally, the sensitivity analysis submodule 121 is used to determine the environmental impact sensitivity based on historical grounding resistance measurements and corresponding historical soil environmental parameters.

[0024] Specifically, the sensitivity analysis submodule 121 first uses a preset correlation analysis algorithm (such as Pearson correlation coefficient calculation) based on a historical database to determine the statistical correlation between historical soil environmental parameters (such as temperature and humidity) and historical grounding resistance measurements, obtaining a correlation assessment value to quantify the correlation strength between environmental factors and resistance fluctuations. Then, for each specific measurement record in the historical database, the sensitivity analysis submodule 121 calculates the change in grounding resistance between the current measurement and its previous measurement, and combines this with the determined correlation assessment value to comprehensively analyze and derive a value characterizing the degree to which the current measurement is affected by instantaneous environmental changes, i.e., the environmental impact sensitivity of this historical measurement.

[0025] All calculated historical sensitivity data will be passed to the consistency analysis submodule 122 and the factor synthesis submodule 123.

[0026] (2.2) Consistency Analysis Submodule 122.

[0027] Optionally, the consistency analysis submodule 122 is used to determine the environmental impact consistency value of the measurement area based on the environmental impact sensitivity of each reference power tower in the measurement area within a preset time period.

[0028] Specifically, the consistency analysis submodule 122 first obtains the environmental impact sensitivity of all reference power towers for each historical measurement time within a preset time period. Then, the consistency analysis submodule 122 calculates the dispersion of this set of sensitivity data (e.g., calculating the standard deviation or mean absolute deviation). Finally, based on the magnitude of this dispersion, the consistency analysis submodule 122 determines a numerical index to characterize whether the interference of regional environmental changes on the measurement values ​​of each tower at that measurement time has synchronicity and consistency; that is, the environmental impact consistency value. The higher this value, the more likely the fluctuation in the measurement value is caused by regional, common environmental factors.

[0029] The calculated sequence of consistency values ​​is output to the factor synthesis submodule 123.

[0030] (2.3) Factor synthesis submodule 123.

[0031] Optionally, the factor synthesis submodule 123 is used to determine environmental correction factors based on the current environmental change, environmental impact sensitivity, and environmental impact consistency value.

[0032] Specifically, the factor synthesis submodule 123 first determines the current environmental change of the target power tower by comparing real-time soil environmental parameters with historical environmental parameters. Then, combining the environmental impact sensitivity analysis logic provided by the sensitivity analysis submodule 121 with the current environmental change, it determines the current environmental impact level of the target power tower at the current measurement moment. Simultaneously, the factor synthesis submodule 123 retrieves the environmental impact levels calculated for the target tower from the historical database, analyzes their fluctuations, and determines the unique environmental impact fluctuation level of the tower, reflecting the overall severity and instability of environmental disturbances at that location. Finally, the factor synthesis submodule 123 synthesizes a final environmental correction factor by combining the current environmental impact level, the environmental impact fluctuation level, and the environmental impact consistency value related to the current measurement moment provided by the consistency analysis submodule 122, through a specific mathematical relationship. This factor aims to quantify the intensity of the current environmental disturbance; the smaller the value, the more significant the disturbance, and the greater the correction required.

[0033] The synthesized environmental correction factor is sent to the resistance value correction module 13.

[0034] (3) Resistance value correction module 13.

[0035] The resistance value correction module 13 is responsible for performing the core correction calculation. This module receives the real-time grounding resistance measurement value from the data acquisition module 11 and the environmental correction factor from the correction factor calculation module 12. By calculating and eliminating the deviation introduced by environmental fluctuations, it outputs a resistance value that is closer to the true stable state of the grounding device.

[0036] Optionally, the resistance value correction module 13 is used to correct the real-time grounding resistance measurement value according to the environmental correction factor to obtain the real-time grounding resistance correction value of the target power tower.

[0037] Specifically, the resistance correction module 13 divides the real-time grounding resistance measurement by the environmental correction factor to complete the correction calculation and obtain the real-time grounding resistance correction value. This correction value theoretically eliminates the interference of instantaneous environmental fluctuations, better reflects the inherent resistance characteristics of the grounding grid itself, and has better time consistency and comparability. The calculated real-time grounding resistance correction value is immediately transmitted to the early warning module 14.

[0038] (4) Early warning module 14.

[0039] The early warning module 14 is responsible for making safety judgments based on the corrected and more accurate resistance values, and generating early warning information in a timely manner when potential risks are detected, providing direct operational guidance to maintenance personnel.

[0040] Optionally, the early warning module 14 is used to provide an early warning of the grounding status of the target power tower based on the real-time grounding resistance correction value and the preset safety threshold.

[0041] Specifically, the early warning module 14 has pre-stored a grounding resistance safety threshold set according to power industry standards or operation and maintenance procedures. The early warning module 14 first compares the real-time grounding resistance correction value from the resistance correction module 13 with this preset safety threshold. Then, if the real-time grounding resistance correction value is greater than the preset safety threshold, the early warning module 14 determines that the grounding status of the target power tower is abnormal and poses a safety hazard. Finally, the early warning module 14 automatically generates a grounding anomaly early warning signal containing information such as the tower number, abnormal resistance value, and measurement time, and outputs it through multiple preset channels such as the system interface, SMS, and audible and visual alarms, prompting operation and maintenance personnel to immediately intervene for inspection or repair.

[0042] The measurement system 10 and its included modules have been described above.

[0043] For example, such as Figure 2 The diagram shown is a flowchart illustrating a method for measuring the grounding resistance of a power tower according to an embodiment of the present invention, comprising the following steps: S201. Obtain the real-time grounding resistance measurement value of the target power tower and the real-time soil environmental parameters of the measurement area.

[0044] For example, this step can be performed by the data acquisition module 11 in the measurement system 10 described above.

[0045] Specifically, the data acquisition module 11 first directly reads the real-time grounding resistance measurement value of the target power tower by connecting a high-precision grounding resistance measuring sensor or tester to the grounding down conductor. Then, the data acquisition module 11 synchronously collects real-time soil environmental parameters reflecting the current soil condition by reading signals from soil temperature and soil moisture sensors pre-deployed in the soil around the tower. These parameters mainly include soil temperature and soil moisture. The data acquisition module 11 aligns and binds these two types of real-time data according to the same timestamp, forming a complete real-time measurement data packet.

[0046] Thus, the data acquisition module 11 synchronously and accurately collects the electrical measurement data and environmental background data necessary for accurate evaluation of grounding resistance by calling various physical sensors deployed on site, providing a reliable input basis for subsequent correction analysis.

[0047] S202. Based on real-time soil environmental parameters, as well as the historical grounding resistance measurements and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period, determine the environmental correction factor of the target power tower under the current measurement.

[0048] For example, this step can be performed by the correction factor calculation module 12 in the measurement system 10 described above. Specifically, the correction factor calculation module 12 first analyzes the influence of changes in soil environmental parameters on historical grounding resistance measurements based on a historical database to determine the environmental impact sensitivity. Simultaneously, the correction factor calculation module 12 analyzes the consistency of environmental impact on each reference tower within the area to determine the environmental impact consistency value of the measurement area. Then, the correction factor calculation module 12 determines the current environmental change based on real-time soil environmental parameters. Finally, the correction factor calculation module 12 comprehensively utilizes the current environmental change, environmental impact sensitivity, and environmental impact consistency value, and synthesizes an environmental correction factor specifically used to compensate for current environmental interference through a preset calculation model. It should be noted that the specific procedures for the aforementioned sub-steps can be found in S301-S304 below, and will not be repeated here.

[0049] In another possible implementation, when determining the environmental correction factor for the target power tower under the current measurement, the correction factor calculation module 12 can also divide the numerical range of soil temperature and humidity into multiple interval combinations based on long-term monitoring data, and preset an empirical correction coefficient for each interval combination. Then, the correction factor calculation module 12 directly maps the real-time collected soil temperature and humidity values ​​to the corresponding intervals and retrieves the corresponding empirical correction coefficient as the environmental correction factor.

[0050] Therefore, the correction factor calculation module 12 quantitatively assesses the interference intensity caused by the current specific environmental conditions to the grounding resistance measurement by comprehensively analyzing real-time environmental data, historical data patterns and regional consistency characteristics, and finally condenses it into an environmental correction factor that can be directly used for numerical correction.

[0051] S203. Based on the environmental correction factor, the real-time grounding resistance measurement value is corrected to obtain the corrected real-time grounding resistance value of the target power tower.

[0052] For example, this step can be performed by the resistance correction module 13 in the measurement system 10 described above.

[0053] Specifically, the resistance value correction module 13 receives the real-time grounding resistance measurement value from the data acquisition module 11 and the environmental correction factor from the correction factor calculation module 12. Then, the resistance value correction module 13 performs a division operation, dividing the real-time grounding resistance measurement value by the environmental correction factor, thereby completing the mathematical correction calculation, and finally outputting the corrected result, which is the real-time grounding resistance correction value of the target power tower.

[0054] Therefore, the resistance correction module 13 removes the interference effect quantified by the environmental correction factor from the original measurement value through a simple numerical calculation, so that the output real-time grounding resistance correction value theoretically eliminates the deviation caused by instantaneous soil temperature and humidity fluctuations, and can better reflect the inherent and stable resistance characteristics of the grounding device itself.

[0055] S204. Based on the real-time grounding resistance correction value and the preset safety threshold, provide an early warning of the grounding status of the target power tower.

[0056] For example, this step can be performed by the warning module 14 in the measurement system 10 described above.

[0057] Specifically, the early warning module 14 internally stores a grounding resistance safety threshold set according to power industry standards or specific operation and maintenance procedures. For example, this preset safety threshold can be determined based on the voltage level of the power tower; for instance, for a 110kV transmission line tower, the preset safety threshold is typically 10Ω; for a 220kV transmission line tower, the preset safety threshold is typically 5Ω. The early warning module 14 first compares the received real-time grounding resistance correction value with this preset safety threshold.

[0058] Then, the early warning module 14 first compares the received real-time grounding resistance correction value with the preset safety threshold. If the real-time grounding resistance correction value is greater than the preset safety threshold, the early warning module 14 determines that the grounding status of the target power tower is abnormal and poses a safety hazard. Finally, the early warning module 14 automatically generates a grounding anomaly early warning signal containing key information such as the tower identification, abnormal resistance value, and measurement time, and outputs it through one or more preset channels, such as system interface pop-ups, SMS notifications, and audible and visual alarms, to prompt maintenance personnel to take timely inspection or repair measures.

[0059] Therefore, the early warning module 14 makes safety judgments based on more accurate and stable real-time grounding resistance correction values, which significantly reduces the risk of false alarms or missed alarms caused by environmental interference, and provides accurate and reliable risk decision support for power grid operation and maintenance personnel.

[0060] Based on the above technical solution, this invention introduces an environmental correction factor to dynamically correct the original grounding resistance measurement value, effectively suppressing the interference of instantaneous fluctuations in the soil environment on the measurement results, thereby obtaining a resistance value that is closer to the true stable state of the grounding device, significantly improving the measurement accuracy, consistency and comparability, and providing a more reliable data foundation for the safety status assessment and intelligent operation and maintenance of power towers.

[0061] For example, in another method for measuring the grounding resistance of a power tower provided in one embodiment of the present invention, the environmental correction factor of the target power tower under the current measurement is determined based on real-time soil environmental parameters and historical grounding resistance measurements and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period. This specifically includes the following steps: S301. Determine the environmental impact sensitivity based on historical grounding resistance measurements and corresponding historical soil environmental parameters. The environmental impact sensitivity characterizes the degree to which changes in soil environmental parameters affect historical grounding resistance measurements.

[0062] Optionally, this step is performed by the sensitivity analysis submodule 121 in the correction factor calculation module 12, and specifically includes the following steps: (1) Based on the preset correlation analysis algorithm, determine the correlation assessment value between historical soil environmental parameters and historical grounding resistance measurement values.

[0063] For example, the pre-defined correlation analysis algorithm can be the Pearson correlation coefficient algorithm.

[0064] In this step, the sensitivity analysis submodule 121 first calls up the historical grounding resistance measurement sequence and historical soil environmental parameter sequence of all reference power towers in the historical database within a historical time period (hereinafter referred to as the preset time period) that is adjacent to the current measurement time and reflects the recent environmental change pattern. The historical time period consists of all historical measurement records taken over a consecutive 30 days prior to the current measurement time. This duration is sufficient to cover typical daily variations in soil temperature and humidity and short-term meteorological fluctuations, effectively reflecting the influence of environmental factors on grounding resistance.

[0065] Next, for the two key environmental parameters, soil temperature and soil moisture, Pearson correlation coefficients were calculated between them and the historical grounding resistance measurement series. For example, the formula for calculating the Pearson correlation coefficient between temperature and grounding resistance is as follows: in, The correlation coefficient between temperature and grounding resistance is used as one of the subsequent correlation evaluation values. This represents the average of all historical soil temperature measurements within the region. This represents the average of all historical grounding resistance measurements within the area; N represents the total number of reference power towers within the measurement area. This represents the temperature value measured in the k-th historical data of the nth reference tower; This represents the grounding resistance value of the nth reference tower in the kth historical measurement; N represents the total number of reference towers; and K represents the total number of measurements within the preset time period.

[0066] Understandably, the above formula calculates the degree of linear correlation between the temperature series and the resistance value series. Correlation coefficient. The larger the absolute value, the stronger the statistical correlation between the fluctuation of the soil environmental parameter (temperature) and the measured grounding resistance value; that is, the more significant the impact of its change on the measurement accuracy. Correlation coefficient between humidity and grounding resistance. The calculation method is the same.

[0067] (2) For each historical measurement, the environmental impact sensitivity of each historical measurement is determined based on the change in grounding resistance and the correlation assessment value between two consecutive measurements.

[0068] Furthermore, the sensitivity analysis submodule 121 calculates the environmental impact sensitivity for each specific historical measurement record in the database (e.g., the k-th historical measurement of the nth tower). This value incorporates the instantaneous effects of temperature and humidity changes on the resistance value, and the calculation formula is as follows: in, This represents the environmental impact sensitivity of the nth reference tower during the kth historical measurement. This represents the change in grounding resistance between the k-th historical measurement and the (k-1)-th historical measurement of the tower (i.e. - , can be positive or negative; (This represents the grounding resistance value of the (k-1)th historical measurement of the nth reference tower). This indicates the corresponding change in soil temperature. This indicates the corresponding change in soil moisture (i.e.) - , can be positive or negative; This represents the soil moisture value measured k times in the history of the nth reference tower. (This represents the soil moisture value from the (k-1)th historical measurement of the nth reference tower). and These are the correlation evaluation values ​​of temperature, humidity and grounding resistance calculated in step (1), respectively.

[0069] It should be noted that the above formula quantifies the instantaneous impact intensity by calculating the ratio of resistance change caused by a unit change in environmental conditions (temperature or humidity). This ratio is then multiplied by the global correlation assessment value and incremented by 1 to obtain the sensitivity components for the temperature and humidity dimensions. Finally, the two components are multiplied to obtain the comprehensive environmental impact sensitivity. . The higher the value, the greater the influence of environmental fluctuations at that time on the historical measurement.

[0070] S302. Determine the environmental impact consistency value of the measurement area based on the environmental impact sensitivity of each reference power tower in the measurement area within a preset time period.

[0071] Optionally, this step is performed by the consistency analysis submodule 122 in the correction factor calculation module 12, and specifically includes the following steps: (1) Determine the degree of dispersion of the influence sensitivity of all reference power towers in each historical measurement within the preset time period.

[0072] Specifically, the consistency analysis submodule 122 collects the environmental impact sensitivity calculated from all N reference towers at each historical measurement time (kth time) in the historical database. , … Next, the dispersion of this set of sensitivity data is calculated, for example, by calculating its standard deviation. Or mean absolute deviation, used to quantify the difference in sensitivity of each tower at that moment.

[0073] (2) Determine the consistency value of the environmental impact of the measurement area at the corresponding historical measurement time based on the degree of dispersion.

[0074] Furthermore, the consistency analysis submodule 122 calculates the dispersion (in terms of standard deviation) based on the calculated dispersion. For example, the environmental impact consistency value at the measurement time can be calculated using the following formula. : in, This represents the consistency value of the environmental impact of the measurement area corresponding to the k-th historical measurement time. This represents the standard deviation of the sensitivity of all reference towers to environmental influences at that moment. It should be noted that the degree of dispersion ( The smaller the value (characteristic), the closer the sensitivity of each tower is, meaning the more synchronized the response of the grounding resistance at each point in the area to environmental disturbances, and the more likely it is caused by regional, common environmental changes (such as a rainfall event). The formula maps the degree of dispersion to a value of consistency. , The smaller the denominator (1+ The closer it is to 1, the better. The larger the value, the higher the consistency of the represented region.

[0075] S303. Determine the current environmental changes of the target power tower based on real-time and historical soil environmental parameters.

[0076] For example, the correction factor calculation module 12 determines the current environmental change by comparing the real-time soil environmental parameters at the current measurement moment with the historical environmental parameter benchmarks of the target power tower itself. Specifically, this includes obtaining the soil temperature of the target power tower in the most recent historical measurement. and soil moisture As a reference baseline, the current real-time measured soil temperature is then calculated. and The difference is used as the temperature change. ; Calculate the current real-time measured soil moisture and The difference is used as the humidity change. These two changes together constitute the current environmental change quantity used to assess the intensity of the current environmental disturbance.

[0077] S304. Determine the environmental correction factor based on the current environmental change, environmental impact sensitivity, and environmental impact consistency value.

[0078] Optionally, this step is performed by the factor synthesis submodule 123 in the correction factor calculation module 12, and specifically includes the following steps: (1) Determine the current environmental impact of the target power tower based on the current environmental change and impact sensitivity.

[0079] Specifically, the factor synthesis submodule 123 first needs to determine the equivalent resistance change used to assess the current environmental impact. To achieve this estimation, the system has already pre-fitted the soil temperature change using a linear regression method during the historical data analysis phase (i.e., S301). Changes in soil moisture Relative to the change in grounding resistance The approximate relationship coefficient between them is denoted as and .

[0080] Subsequently, the factor synthesis submodule 123 uses the same method as step (2) in S301 to calculate the sensitivity to historical environmental influences. Similar logic, but for the current real-time measurement data: use the correlation assessment value obtained in S301. , and the current environmental changes identified in S303. , Based on the aforementioned relationship coefficients, the change in equivalent resistance due to the current environmental impact is calculated. Furthermore, considering the aforementioned changes in equivalent resistance due to current environmental impacts... Calculate the "current environmental impact sensitivity" under the current measurement. The calculation formula refers to step (2) of S301 mentioned above.

[0081] Therefore, this is combined with the regional environmental impact consistency value corresponding to the historical measurement time closest to the current measurement time. The current environmental impact level can be calculated using the following formula. : in, This indicates the current environmental impact level of the target power tower; This value represents the consistency of regional environmental impacts at nearby historical moments. This represents the estimated current environmental impact sensitivity. It's easy to understand that the formula reflects the current degree of environmental impact. It integrates the instantaneous impact intensity of environmental changes (through...) (manifested) and the pervasiveness of this impact across the region (through) reflect). The larger the value, the more deeply the current measurement is affected by changes in the soil environment.

[0082] (2) Determine the degree of environmental impact fluctuation of the target power tower based on the degree of environmental impact of the target power tower in each of the preset time periods.

[0083] Furthermore, the factor synthesis submodule 123 extracts the historical environmental impact sequence of the target tower from the historical database, obtained from previous calculations within a preset time period. This sequence reflects the historical changes in the intensity of environmental disturbances faced by this tower location. To quantify the severity of these fluctuations, the degree of environmental impact fluctuation for this tower was calculated. For example, by calculating the standard deviation of the sequence, or by using the following formula to calculate its average deviation relative to the minimum disturbance level: in, This indicates the degree of fluctuation in the environmental impact of the nth (i.e., the target) power tower; This indicates the degree of environmental impact of the tower in the k-th historical measurement; This represents the minimum value among all historical environmental impacts of the tower, which can be regarded as the "baseline environmental disturbance level" for that location; K is the total number of measurements.

[0084] It is understandable that in the above formula It measures the average fluctuation of the degree of historical environmental impact around its lowest level. The larger the value, the more significant and unstable the measurement data of the tower has been affected by environmental fluctuations in history, meaning that the location is more sensitive to environmental disturbances.

[0085] (3) Determine the environmental correction factor based on the current environmental impact level, the environmental impact fluctuation level, and the environmental impact consistency level.

[0086] Finally, the factor synthesis submodule 123 comprehensively considers the current environmental impact level. The degree of fluctuation in the environmental impact of the target tower and the degree of consistency of regional environmental impact The final environmental correction factor is synthesized using the following formula. : in, This represents the environmental correction factor for the current target tower and the current measurement time. It should be noted that the environmental correction factor in this formula... This aims to compensate for and correct measurements affected by environmental interference. In the formula, This characterizes the inherent susceptibility to interference at this location. This characterizes the instantaneous intensity of the current disturbance. The larger the product of the two, the stronger the overall effect of the environmental disturbance; consequently, the larger the denominator, leading to... The smaller the value, the more likely the original measurement will be divided by this smaller value. This allows for upward correction, compensating for falsely low resistance measurements caused by environmental factors (such as high temperature and humidity leading to increased soil conductivity).

[0087] Based on the above technical solution, this invention, through quantitative analysis of the correlation between historical environmental data and resistance values, the consistency of regional impacts, and the interference fluctuation characteristics of specific tower locations, can dynamically calculate a correction factor that accurately reflects the current environmental interference intensity. This factor acts as a bridge, separating the impact of environmental fluctuations from the original measurement values, thereby significantly improving the accuracy of power tower grounding resistance measurement results and their comparability under different environmental conditions, laying a solid data foundation for subsequent accurate early warning and operation and maintenance decisions.

[0088] In this embodiment of the invention, the power tower grounding resistance measuring device can be divided into functional modules or functional units according to the above method example. For example, each function can be divided into its own functional modules or functional units, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module or functional unit. The module or unit division in this embodiment is illustrative and represents only one logical functional division; in actual implementation, other division methods may be used.

[0089] For example, such as Figure 3The diagram shown is a possible structural schematic of a power tower grounding resistance measuring device according to an embodiment of the present invention. The power tower grounding resistance measuring device 400 includes: an acquisition unit 401 and a processing unit 402.

[0090] The acquisition unit 401 is used to acquire the real-time grounding resistance measurement value of the target power tower and the real-time soil environmental parameters of the measurement area.

[0091] The processing unit 402 is used to determine the environmental correction factor of the target power tower under the current measurement based on the real-time soil environmental parameters and the historical grounding resistance measurement values ​​and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period.

[0092] The processing unit 402 is also used to correct the real-time grounding resistance measurement value according to the environmental correction factor to obtain the corrected real-time grounding resistance value of the target power tower.

[0093] The processing unit 402 is also used to provide early warning of the grounding status of the target power tower based on the real-time grounding resistance correction value and the preset safety threshold.

[0094] Optionally, the processing unit 402 is further configured to determine the environmental impact sensitivity based on historical grounding resistance measurements and corresponding historical soil environmental parameters. The environmental impact sensitivity characterizes the degree to which changes in soil environmental parameters affect historical grounding resistance measurements.

[0095] Optionally, the processing unit 402 is also used to determine the environmental impact consistency value of the measurement area based on the environmental impact sensitivity of each reference power tower in the measurement area within a preset time period.

[0096] Optionally, the processing unit 402 is also used to determine the current environmental change of the target power tower based on real-time soil environmental parameters and historical soil environmental parameters.

[0097] Optionally, the processing unit 402 is also used to determine an environmental correction factor based on the current environmental change, environmental impact sensitivity, and environmental impact consistency value.

[0098] Optionally, the processing unit 402 is also used to determine the correlation assessment value between historical soil environmental parameters and historical grounding resistance measurements according to a preset correlation analysis algorithm.

[0099] Optionally, the processing unit 402 is also configured to determine the environmental impact sensitivity of each historical measurement based on the change in grounding resistance and the correlation assessment value between two consecutive measurements.

[0100] Optionally, the processing unit 402 is also used to determine the degree of dispersion of the influence sensitivity of all reference power towers in each historical measurement within a preset time period.

[0101] Optionally, the processing unit 402 is also configured to determine the environmental impact consistency value of the measurement area at the corresponding historical measurement time based on the degree of dispersion.

[0102] Optionally, the processing unit 402 is also used to determine the current environmental impact level of the target power tower based on the current environmental change and impact sensitivity.

[0103] Optionally, the processing unit 402 is also used to determine the degree of environmental impact fluctuation of the target power tower based on the degree of environmental impact of the target power tower in previous periods within a preset time period.

[0104] Optionally, the processing unit 402 is also used to determine an environmental correction factor based on the current degree of environmental impact, the degree of fluctuation of environmental impact, and the degree of consistency of environmental impact.

[0105] Optionally, the processing unit 402 is also configured to compare the real-time grounding resistance correction value with a preset safety threshold.

[0106] Optionally, the processing unit 402 is also configured to generate and output a grounding anomaly warning signal for the target power tower if the real-time grounding resistance correction value is greater than a preset safety threshold.

[0107] Optionally, the acquisition unit 401 is also used to acquire soil temperature by means of a soil temperature sensor located around the target power tower.

[0108] Optionally, the acquisition unit 401 is also used to acquire soil moisture by means of a soil moisture sensor located around the target power tower.

[0109] Optionally, the acquisition unit 401 is also used to select multiple power towers with the same structure in the measurement area as reference power towers.

[0110] Optionally, the acquisition unit 401 is also used to collect the historical grounding resistance measurement values ​​and corresponding historical soil environmental parameters of each reference power tower within a preset time period, and perform normalization processing to establish a structured database.

[0111] Optionally, the power tower grounding resistance measuring device 400 may also include a storage unit ( Figure 3 (shown in dashed box) The storage unit stores a program or instruction. When the acquisition unit 401 and the processing unit 402 execute the program or instruction, the power tower grounding resistance measuring device can perform the power tower grounding resistance measuring method described in the above method embodiment.

[0112] also, Figure 3 The technical effects of the power tower grounding resistance measuring device can be referred to the technical effects of the power tower grounding resistance measuring method described in the above embodiments, and will not be repeated here.

[0113] For example, Figure 4 This is another possible structural schematic diagram of the power tower grounding resistance measuring device involved in the above embodiments. For example... Figure 4 As shown, the power tower grounding resistance measuring device 500 includes: processor 502.

[0114] The processor 502 is used to control and manage the operation of the power tower grounding resistance measuring device 400, for example, to execute the steps performed by the acquisition unit 401 and the processing unit 402 in the power tower grounding resistance measuring device 400, and / or to execute other processes of the technical solution described herein.

[0115] The processor 502 described above can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the present invention. The processor can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the present invention. The processor can also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0116] Optionally, the power tower grounding resistance measuring device 500 may further include a communication interface 503, a memory 501, and a bus 504. The communication interface 503 supports communication between the power tower grounding resistance measuring device 500 and other network entities. The memory 501 stores the program code and data of the power tower grounding resistance measuring device.

[0117] The memory 501 may be a memory in a power tower grounding resistance measuring device. The memory may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk or solid-state drive; the memory may also include a combination of the above types of memory.

[0118] Bus 504 can be an Extended Industry Standard Architecture (EISA) bus, etc. Bus 504 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0119] Through the above description of the embodiments, those skilled in the art will clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and module described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0120] This invention provides a computer program product containing instructions that, when run on the electronic device of this invention, cause the computer to execute the power tower grounding resistance measurement method described in the above method embodiments.

[0121] This invention also provides a computer-readable storage medium storing instructions. When a computer executes these instructions, the electronic device of this invention performs each step of the power tower grounding resistance measuring device in the method flow shown in the above-described method embodiments.

[0122] The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), registers, hard disks, optical fibers, compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof, or any other form of computer-readable storage medium in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium may also be a component of the processor. The processor and the storage medium may reside in an application-specific integrated circuit (ASIC). In embodiments of the present invention, a computer-readable storage medium may be any tangible medium that contains or stores a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0123] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0124] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

Claims

1. A method for measuring the grounding resistance of power transmission towers, characterized in that, The method includes: Obtain the real-time grounding resistance measurement value of the target power tower and the real-time soil environmental parameters of the measurement area; Based on the real-time soil environmental parameters, and the historical grounding resistance measurements and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period, the environmental correction factor of the target power tower under the current measurement is determined. Based on the environmental correction factor, the real-time grounding resistance measurement value is corrected to obtain the corrected real-time grounding resistance value of the target power tower; Based on the real-time grounding resistance correction value and the preset safety threshold, an early warning is issued regarding the grounding status of the target power tower.

2. The method for measuring the grounding resistance of power transmission towers according to claim 1, characterized in that, Based on the real-time soil environmental parameters, and the historical grounding resistance measurements and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period, the environmental correction factor for the target power tower under the current measurement is determined, specifically including: Based on the historical grounding resistance measurements and the corresponding historical soil environmental parameters, the environmental impact sensitivity is determined; wherein, the environmental impact sensitivity is used to characterize the degree of influence of changes in soil environmental parameters on the historical grounding resistance measurements. Based on the environmental impact sensitivity of each reference power tower in the measurement area during the preset time period, the environmental impact consistency value of the measurement area is determined; Based on the real-time soil environmental parameters and the historical soil environmental parameters, the current environmental change of the target power tower is determined; The environmental correction factor is determined based on the current environmental change, the environmental impact sensitivity, and the environmental impact consistency value.

3. The method for measuring the grounding resistance of power transmission towers according to claim 2, characterized in that, Based on the historical grounding resistance measurements and corresponding historical soil environmental parameters, the environmental impact sensitivity is determined, specifically including: Based on a preset correlation analysis algorithm, the correlation assessment value between the historical soil environmental parameters and the historical grounding resistance measurement value is determined; For each historical measurement, the environmental impact sensitivity of each historical measurement is determined based on the change in grounding resistance between two consecutive measurements and the aforementioned correlation assessment value.

4. The method for measuring the grounding resistance of power transmission towers according to claim 2, characterized in that, Based on the environmental impact sensitivity of each reference power tower in the measurement area during the preset time period, the environmental impact consistency value of the measurement area is determined, specifically including: Determine the dispersion of the influence sensitivity of all reference power towers in each historical measurement within the preset time period; Based on the degree of dispersion, the consistency value of the environmental impact of the measurement area at the corresponding historical measurement time is determined.

5. The method for measuring the grounding resistance of power transmission towers according to claim 2, characterized in that, The environmental correction factor is determined based on the current environmental change, the environmental impact sensitivity, and the environmental impact consistency value, specifically including: Based on the current environmental change and the impact sensitivity, determine the current environmental impact level of the target power tower; The degree of environmental impact fluctuation of the target power tower is determined based on the degree of environmental impact of the target power tower during the preset time period. The environmental correction factor is determined based on the current degree of environmental impact, the degree of fluctuation of environmental impact, and the degree of consistency of environmental impact.

6. The method for measuring the grounding resistance of power transmission towers according to claim 1, characterized in that, Based on the real-time grounding resistance correction value and the preset safety threshold, an early warning is issued regarding the grounding status of the target power tower, specifically including: The real-time grounding resistance correction value is compared with the preset safety threshold. If the real-time grounding resistance correction value is greater than the preset safety threshold, a grounding anomaly warning signal for the target power tower is generated and output.

7. The method for measuring the grounding resistance of power transmission towers according to claim 1, characterized in that, The real-time soil environmental parameters include soil temperature and soil moisture; obtaining the real-time soil environmental parameters specifically includes: The soil temperature is collected by a soil temperature sensor installed around the target power tower; The soil moisture is collected by soil moisture sensors installed around the target power tower.

8. The method for measuring the grounding resistance of power transmission towers according to claim 1, characterized in that, Before obtaining the real-time grounding resistance measurement value of the target power tower and the real-time soil environmental parameters of the measurement area, the method further includes: Multiple power towers with identical structures are selected in the measurement area as reference power towers; The historical grounding resistance measurements and corresponding historical soil environmental parameters of each reference power tower within the preset time period are collected and normalized to establish a structured database.

9. A device for measuring the grounding resistance of power transmission towers, characterized in that, include: A processor and a memory; wherein the memory is used to store computer execution instructions, and when the power tower grounding resistance measuring device is running, the processor executes the computer execution instructions stored in the memory to cause the power tower grounding resistance measuring device to perform the power tower grounding resistance measuring method as described in any one of claims 1-8.

10. A power tower grounding resistance measurement system, characterized in that, The system includes: a data acquisition module, a correction factor calculation module, a resistance value correction module, and an early warning module; The data acquisition module is used to acquire the real-time grounding resistance measurement value of the target power tower and the real-time soil environmental parameters of the measurement area. The correction factor calculation module is used to determine the environmental correction factor of the target power tower under the current measurement based on the real-time soil environmental parameters, as well as the historical grounding resistance measurement values ​​and corresponding historical soil environmental parameters of multiple reference power towers in the measurement area within a preset time period. The resistance value correction module is used to correct the real-time grounding resistance measurement value according to the environmental correction factor to obtain the real-time grounding resistance correction value of the target power tower. The early warning module is used to provide an early warning of the grounding status of the target power tower based on the real-time grounding resistance correction value and the preset safety threshold.

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