Device and method for detecting corrosion state of grounding resistor of power transmission, transformation and distribution equipment

Abstract

The invention discloses a transmission, transformation and distribution equipment grounding resistor corrosion state detection device and method, and relates to the technical field of power monitoring, and the device comprises a multi-source feature collection module which is used for collecting data based on a corrosion influence factor and generating a corrosion state index, and a resistor time sequence interception module which is used for monitoring and intercepting a dynamic grounding resistor time sequence, the resistance time sequence comparison module is used for comparing with the reference grounding resistance to obtain a second corrosion state index, the corrosion early warning module is used for sending out an early warning signal when the index exceeds the standard, and the corrosion emergency processing module is used for taking corresponding emergency processing measures according to the early warning signal. The technical problem that early warning lags due to the fact that existing transmission, transformation and distribution equipment grounding resistor corrosion state monitoring depends on manual inspection or regular detection and lacks real-time and comprehensive evaluation means is solved, and the technical effects that the corrosion state is evaluated in real time and early warning timeliness is improved through multi-source data collection and dynamic monitoring are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power monitoring, and particularly to a detection device and method for the corrosion state of the grounding resistance of power transmission, transformation and distribution equipment. Background Art

[0002] In the power system, the grounding resistance of power transmission, transformation and distribution equipment is crucial for ensuring the safe and stable operation of the equipment. The increase in the grounding resistance may be caused by various factors such as environmental changes, soil corrosion, equipment aging or improper operating conditions. Existing technologies mostly rely on manual inspections or regular detections for grounding resistance monitoring. This method has problems such as poor real-time performance, narrow coverage, and difficulty in comprehensively evaluating the corrosion state of the equipment. In addition, traditional monitoring means cannot fully consider the influence of various factors on equipment corrosion, resulting in corrosion problems often being difficult to detect in a timely manner. Summary of the Invention

[0003] This application provides a detection device and method for the corrosion state of the grounding resistance of power transmission, transformation and distribution equipment, which is used to solve the technical problem that the existing monitoring of the corrosion state of the grounding resistance of power transmission, transformation and distribution equipment relies on manual inspections or regular detections, lacks real-time and comprehensive evaluation means, and leads to delayed early warnings.

[0004] In the first aspect of this application, a detection device for the corrosion state of the grounding resistance of power transmission, transformation and distribution equipment is provided. The device includes: a multi-source feature collection module, which is used to collect multi-source features of the power transmission, transformation and distribution equipment based on predetermined corrosion influence factors, obtain a multi-source information set, and analyze the multi-source information set to obtain a first corrosion state index; a resistance time series intercepting module, which is used to monitor the dynamic grounding resistance time series of the power transmission, transformation and distribution equipment, and intercept the time series of the dynamic grounding resistance in combination with a predetermined period to obtain a periodic grounding resistance time series; a resistance time series comparison module, which is used to compare the periodic grounding resistance time series with the reference grounding resistance time series of the power transmission, transformation and distribution equipment to obtain a second corrosion state index; a corrosion early warning module, which is used to issue a corrosion early warning signal if the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit; a corrosion emergency treatment module, which is used to perform corrosion emergency treatment on the power transmission, transformation and distribution equipment according to the corrosion early warning signal.

[0005] In a second aspect of the present application, a method for detecting the corrosion state of the grounding resistance of power transmission, transformation and distribution equipment is provided. The method includes: collecting multi-source features of the power transmission, transformation and distribution equipment based on predetermined corrosion influence factors to obtain a multi-source information set, and analyzing the multi-source information set to obtain a first corrosion state index; monitoring the dynamic grounding resistance time series of the power transmission, transformation and distribution equipment, and performing time series truncation on the dynamic grounding resistance time series in combination with a predetermined period to obtain a periodic grounding resistance time series; comparing the periodic grounding resistance time series with the reference grounding resistance time series of the power transmission, transformation and distribution equipment to obtain a second corrosion state index; if the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit, sending a corrosion warning signal; and performing corrosion emergency treatment on the power transmission, transformation and distribution equipment according to the corrosion warning signal.

[0006] One or more technical solutions provided in the present application have at least the following technical effects or advantages: The corrosion state detection device and method for the grounding resistance of power transmission, transformation and distribution equipment provided in the present application relate to the technical field of power monitoring. By collecting multi-source features, monitoring the dynamic grounding resistance, and comparing time series, a corrosion state index is generated to evaluate the corrosion situation of the power transmission, transformation and distribution equipment in real time. If the corrosion index exceeds the standard, the corrosion warning module sends a warning signal, and the corrosion emergency treatment module takes emergency measures to ensure the safe and stable operation of the equipment. It solves the technical problem that the existing corrosion state monitoring of the grounding resistance of power transmission, transformation and distribution equipment relies on manual inspection or regular detection, lacks real-time and comprehensive evaluation means, and leads to lagged warning, and realizes the technical effect of real-time evaluation of the corrosion state and improvement of warning timeliness through multi-source data collection and dynamic monitoring. Description of the Drawings

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0008] Figure 1 It is a schematic structural diagram of a corrosion state detection device for the grounding resistance of power transmission, transformation and distribution equipment provided in an embodiment of the present application; Figure 2 It is a schematic flow diagram of a method for detecting the corrosion state of the grounding resistance of power transmission, transformation and distribution equipment provided in an embodiment of the present application.

[0009] Description of the reference numerals: multi-source feature collection module 10, resistance time series truncation module 20, resistance time series comparison module 30, corrosion warning module 40, corrosion emergency treatment module 50. Detailed Embodiments

[0010] The present application provides a corrosion state detection device and method for the grounding resistance of power transmission, transformation and distribution equipment, which is used to solve the technical problem that the corrosion state monitoring of the grounding resistance of existing power transmission, transformation and distribution equipment relies on manual inspection or regular detection, lacks real-time and comprehensive evaluation means, and leads to lagged early warning.

[0011] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0012] It should be noted that the terms "first", "second", etc. in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or devices.

[0013] Embodiment 1, as Figure 1 shown, the present application provides a corrosion state detection device for the grounding resistance of power transmission, transformation and distribution equipment, and the device includes: A multi-source feature collection module 10, which is used to collect multi-source features of the power transmission, transformation and distribution equipment based on a predetermined corrosion influence factor, obtain a multi-source information set, and analyze the multi-source information set to obtain a first corrosion state index. Among them, the predetermined corrosion influence factor includes an environmental factor, a soil factor, an equipment factor and an operation factor.

[0014] Furthermore, the multi-source feature collection module 10 is further used to perform the following steps: P11: Extract any factor in the predetermined corrosion influence factor; P12: Screen the multi-source information set with the any factor as a screening constraint to obtain an arbitrary feature parameter set; P13: Perform weighted calculation on the arbitrary feature parameter set to obtain an arbitrary influence coefficient; P14: Perform mutation weighting processing based on the arbitrary influence coefficient to obtain the first corrosion state index.

[0015] It should be understood that the main function of the multi-source feature collection module 10 of the present application is to comprehensively and multi-dimensionally collect features of power transmission, transformation and distribution equipment based on a predetermined corrosion impact factor, thereby generating a multi-source information set, and through in-depth analysis of this information set, calculating a first corrosion state index that can quantify the corrosion state.

[0016] In the specific implementation process, the predetermined corrosion impact factor covers multiple aspects such as environmental factors, soil factors, equipment factors, and operation factors. Environmental factors mainly involve the natural environmental conditions where the power transmission, transformation and distribution equipment is located, such as temperature, humidity, rainfall, sunshine duration, etc. These factors will directly affect the corrosion rate and corrosion type of the equipment. Soil factors include the pH value, resistivity, salt content, microbial activity, etc. of the soil. The chemical and physical properties of the soil have a particularly significant impact on the corrosion of the grounding device of the power transmission, transformation and distribution equipment buried underground. Equipment factors refer to the material, structure, coating and other characteristics of the power transmission, transformation and distribution equipment itself. Equipment with different materials and structures may show different corrosion sensitivities in the same environment. Operation factors involve the operation state of the equipment, such as the change trends of operating current, voltage, grounding resistance, etc. The changes in these parameters may reflect the changes in the internal structure of the equipment grounding system, thereby affecting the corrosion state.

[0017] To more accurately analyze the corrosion state, the multi-source feature collection module 10 further performs the following steps: First, extract any factor from the predetermined corrosion impact factors. This process is based on the evaluation of the importance of the corrosion impact factors and the analysis requirements, and selects one or more representative factors for in-depth study. For example, in a certain specific area, if the impact of soil pH on the corrosion of power transmission, transformation and distribution equipment is particularly prominent, then the soil pH factor can be preferentially extracted.

[0018] Next, screen the multi-source information set with any factor as the screening constraint to obtain an arbitrary feature parameter set. The technical support for this step is to extract the feature parameters related to the selected factor from the massive multi-source information by setting screening conditions. For example, if the extracted factor is the equipment operating current, then all data records related to the equipment operating current are screened out to form a feature parameter set containing parameters such as current amplitude, frequency, and fluctuation amplitude. This screening process can effectively reduce data redundancy and improve the efficiency and accuracy of subsequent analysis.

[0019] Subsequently, weighted calculation is performed on any set of characteristic parameters to obtain any influence coefficient. Weighted calculation is a process of assigning different weights based on the different degrees of influence of each characteristic parameter on the corrosion state. For example, for the set of characteristic parameters of the operating current of the equipment, the current amplitude may have a greater influence on the corrosion state, so a higher weight is assigned; while the influence of the current frequency is relatively small, a lower weight is assigned. Through weighted calculation, the comprehensive influence of each characteristic parameter can be quantified into a single value, that is, any influence coefficient. The technical support for this process lies in the reasonable distribution of weights. The determination of weights is usually based on historical data, experimental research or expert experience to ensure the scientificity and reliability of the calculation results.

[0020] Finally, variant weighted processing is performed based on any influence coefficient to obtain the first corrosion state index. Variant weighted processing is a weighted method that takes into account the dynamic changes of characteristic parameters. It can dynamically adjust the weights according to the change trend and amplitude of the characteristic parameters, so as to more accurately reflect the change of the corrosion state. For example, if the change trend of a certain characteristic parameter indicates that the corrosion is accelerating, the weight of this parameter will be increased in the variant weighted processing to highlight its influence on the corrosion state. Through this processing process, the finally obtained first corrosion state index can comprehensively reflect the corrosion state of the power transmission, transformation and distribution equipment under the current environment and operating conditions, providing an important quantitative basis for subsequent corrosion warning and emergency treatment.

[0021] Furthermore, when the multi-source feature collection module 10 performs screening on the multi-source information set with the arbitrary factor as the screening constraint to obtain any set of characteristic parameters, it is also used to perform the following steps: P12-1: If the arbitrary factor is the environmental factor, the set of any characteristic parameters includes at least environmental temperature parameters, environmental humidity parameters, environmental pollution index and environmental salinity index; P12-2: If the arbitrary factor is the soil factor, the set of any characteristic parameters includes at least soil type, soil pH, soil moisture content and soil microorganisms; P12-3: If the arbitrary factor is the equipment factor, the set of any characteristic parameters includes at least material type perishable index and surface corrosion modification index; P12-4: If the arbitrary factor is the operation factor, the set of any characteristic parameters includes at least current density and stray current.

[0022] Optionally, when the multi-source feature collection module 10 performs the screening operation, the following targeted steps also need to be performed according to different categories of corrosion influence factors, so as to ensure that the selected set of characteristic parameters can comprehensively and accurately reflect the influence of the corresponding factors on the corrosion state of the power transmission, transformation and distribution equipment.

[0023] First, when any of the extracted factors is an environmental factor, the multi-source feature collection module 10 will screen out the feature parameter set related to the environment from the multi-source information set. This feature parameter set at least includes environmental temperature parameter, environmental humidity parameter, environmental pollution index, and environmental salinity index. The environmental temperature parameter is collected in real time by a temperature sensor and can reflect the thermal stability of the environment where the equipment is located. The level and fluctuation of temperature will affect the physical properties of the equipment materials and the chemical reaction rate. The environmental humidity parameter is obtained through a humidity sensor and is directly related to the moisture content on the surface of the equipment. A high-humidity environment will accelerate the electrochemical corrosion process of metals. The environmental pollution index is obtained by comprehensively analyzing the concentration of pollutants (such as sulfur dioxide, nitrogen oxides, etc.) in the atmosphere. These pollutants will react chemically with the surface of the equipment, thereby having a corrosive effect on the equipment. The environmental salinity index is specifically for coastal or saline-alkali areas. The presence of salts will significantly enhance the conductivity of the corrosion medium, thereby accelerating the corrosion rate. By screening these specific environmental parameters, the impact of the environment on the corrosion state of power transmission and distribution equipment can be comprehensively evaluated.

[0024] If any factor is a soil factor, the multi-source feature collection module 10 will screen out the feature parameter set related to the soil from the multi-source information set. This feature parameter set at least includes soil type, soil pH value, soil moisture content, and soil microorganisms. The soil type is obtained through soil sampling and analysis, which determines the physical structure and chemical composition of the soil. Different types of soil have significant differences in the corrosion characteristics of the grounding part of the equipment. The soil pH value is measured by a pH sensor and is an important factor affecting the corrosion electrochemical reaction. Acidic or alkaline soil will change the electrode reaction balance of the corrosion cell. The soil moisture content is obtained through a soil humidity sensor and directly determines the transmission ability and reaction activity of the corrosion medium in the soil. Soil microorganisms are obtained through analysis by microbial detection equipment. Microorganisms may participate in the corrosion process through biochemical actions. For example, sulfate-reducing bacteria will promote the corrosion of metals. The screening of these soil parameters can deeply analyze the impact of the soil environment on the corrosion state of the grounding part of power transmission and distribution equipment.

[0025] When any factor is an equipment factor, the multi-source feature collection module 10 will screen out the feature parameter set related to the characteristics of the equipment itself from the multi-source information set. This feature parameter set at least includes the perishable index of the material type and the surface corrosion modification index. The perishable index of the material type is preset according to the inherent corrosion tendency of the materials used in the equipment in a specific environment. Different materials (such as steel, aluminum, copper, etc.) show different corrosion sensitivities in the same environment. The surface corrosion modification index is calculated based on the degree of improvement in the corrosion resistance after the surface of the equipment has been subjected to anti-corrosion treatment (such as coating, plating, etc.). By screening these parameters related to the equipment factors, the impact of the characteristics of the equipment itself on the corrosion state can be evaluated, providing a basis for equipment selection and anti-corrosion design.

[0026] If any factor is an operating factor, the multi-source feature collection module 10 will screen out a set of characteristic parameters related to the device operating state from the multi-source information set. This set of characteristic parameters at least includes current density and stray current. The current density is obtained by a current sensor measuring the current distribution during device operation in real time. A higher current density may cause local overheating or increased electrochemical corrosion. The stray current is the abnormal current generated in the device grounding system due to various reasons detected by a grounding current monitoring device. The presence of stray current will cause electrochemical corrosion, especially when a potential difference is formed in the grounding system. The screening of these operating parameters can analyze their influence on the corrosion state from the perspective of the device operating state, providing guidance for the operation and maintenance of the device.

[0027] Through the detailed description of the above steps, the multi-source feature collection module 10 can accurately screen out the relevant set of characteristic parameters according to the categories of different corrosion influencing factors. This classification and screening method not only improves the pertinence and effectiveness of the data, but also enhances the adaptability and reliability of the entire corrosion state detection device, enabling it to better cope with complex and variable corrosion environments and device operating conditions.

[0028] Furthermore, if the any factor is the device factor, the any set of characteristic parameters at least includes the material type corrosion susceptibility index and the surface corrosion modification index, and the multi-source feature collection module 10 is further configured to perform the following steps: P12-31: Form a set of material types of the power transmission and distribution equipment; P12-32: Match the first corrosion susceptibility index corresponding to the first material type in the material corrosion database; P12-33: Weight the first area proportion of the first material type and the first corrosion susceptibility index to obtain the material type corrosion susceptibility index.

[0029] In a possible embodiment of the present application, when the extracted any factor is a device factor, the multi-source feature collection module 10 will further perform a series of detailed steps to obtain corrosion data related to the device material.

[0030] Specifically, first, the module will form a set of material types for power transmission, transformation, and distribution equipment. This set of material types refers to the collection of various material types used in the equipment, usually including different metals (such as steel, stainless steel, aluminum alloy, etc.) and alloy materials, etc. In this step, the module will conduct a comprehensive material analysis of the power transmission, transformation, and distribution equipment to identify all different material types in the equipment. For example, power transmission, transformation, and distribution equipment may contain multiple metal materials, such as steel, aluminum, copper, etc., as well as non-metal materials (such as insulating materials). Through on-site inspection, consulting the equipment technical documents, or using material identification technology, all material types in the equipment are classified and sorted to form a complete set of material types. This set of material types is the basis for calculating the perishable index of material types subsequently, ensuring the comprehensiveness and accuracy of the corrosion status assessment.

[0031] Next, the module will perform a match in the material corrosion database to find the perishable index corresponding to each material type in the set of material types. The material corrosion database is a pre-established database containing the corrosion characteristic data of various materials under different environmental conditions. This database stores the perishable index of each material, and these indexes are obtained based on long-term experimental research, actual operation data, and expert experience, and can quantify the corrosion tendency of each material under specific environments. By searching in this database, the module can obtain the perishable index corresponding to each material type. The perishable index is a quantitative indicator measuring the corrosion sensitivity of this material under specific environments. For different materials, the values of the perishable index may be different. Generally, materials with a high perishable index are more susceptible to corrosion. For example, by matching the first material type in the set of material types with the records in the database, the first perishable index corresponding to this material type is obtained. For example, if the first material type is steel, the perishable index of steel under the current environmental conditions is matched from the database. <s

[0032] After that, the module will perform a weighting process, weighting the first area proportion of the first material type and the first perishable index to obtain the perishable index of the material type. In practical applications, the distribution areas of different materials in the equipment are different, and the corrosion impact of materials is closely related to their proportion in the equipment. Therefore, the module needs to calculate the area proportion of each material and perform a weighting process with the corresponding perishable index. Specifically, the first area proportion refers to the area proportion of the first material type in the equipment, which is obtained through actual measurement or analysis of the design drawings. Multiply the first area proportion by the first perishable index to obtain a weighted value, which reflects the contribution degree of the first material type to the overall corrosion status of the equipment. By performing similar weighting processes on all material types and accumulating the results, the comprehensive perishable index of the material type is finally obtained. This index can comprehensively reflect the comprehensive impact of different material types in the equipment on the corrosion status, providing an important reference for subsequent corrosion status assessment.

[0033] In summary, the multi-source feature collection module 10 can generate more accurate equipment corrosion evaluation indicators by analyzing and weighting the material types of the equipment in detail, providing more targeted data support for subsequent corrosion status monitoring and early warning. This process ensures that the corrosion characteristics of each material in the equipment are fully considered and can reflect the role played by different materials in the overall corrosion process of the equipment.

[0034] The resistance time series interception module 20 is used to monitor the dynamic grounding resistance time series of the power transmission and distribution equipment and perform time series interception on the dynamic grounding resistance time series in combination with a predetermined period to obtain a periodic grounding resistance time series.

[0035] Specifically, the core function of the resistance time series interception module 20 of the present application is to monitor the dynamic grounding resistance of the power transmission and distribution equipment in real time, intercept its time series data based on a predetermined period, and finally obtain periodic grounding resistance time series data.

[0036] Specifically, first, the module monitors the change of the grounding resistance of the power transmission and distribution equipment through various sensors or power monitoring devices. The dynamic grounding resistance refers to the change of the grounding resistance over time, environmental factors, and the working state of the equipment during the operation of the equipment. The change of the grounding resistance can reflect the health status of the equipment grounding system. An excessively high or low resistance value may indicate problems in the grounding system and affect the safety of the equipment.

[0037] In order to obtain accurate dynamic grounding resistance data, the resistance time series interception module 20 will record the time series data of these grounding resistances in real time, that is, the sequence of resistance values monitored over time. These data can reflect the state of the equipment grounding system at different time points and help determine whether there are abnormalities in the system.

[0038] Then, the module intercepts these dynamic grounding resistance time series data according to a predetermined period. The predetermined period refers to the time interval set according to system requirements, such as every hour, every day, or every week, etc. By dividing the entire grounding resistance time series data into multiple periodic data, the module can generate a periodic grounding resistance time series, that is, the grounding resistance data obtained within each predetermined time period. This process helps to decompose continuous and dynamically changing data into analyzable periodic data, making subsequent analysis more accurate and orderly.

[0039] By intercepting the dynamic grounding resistance time series, the module can provide a periodic resistance data set, providing basic data for subsequent corrosion status analysis and equipment health assessment. The periodic grounding resistance time series is not only convenient for observing the long-term change trend of the grounding resistance, but also can identify possible abnormal fluctuations or fault signals during the operation of the equipment, ensuring the stability of the grounding system and the safe operation of the equipment.

[0040] The resistance timing comparison module 30 is used to compare the periodic grounding resistance timing with the reference grounding resistance timing of the power transmission and distribution equipment to obtain a second corrosion state index.

[0041] Further, the resistance timing comparison module 30 is further configured to perform the following steps: P31: Introduce a timing curve strategy to perform curve fitting on the periodic grounding resistance timing and the reference grounding resistance timing respectively to obtain a periodic curve and a reference curve; P32: Obtain any moment, and respectively match any periodic resistance corresponding to the periodic curve and any reference resistance corresponding to the reference curve at the any moment; P33: Read a predetermined comparison table, and fill in the predetermined comparison table in combination with the any periodic resistance and the any reference resistance to obtain a grounding resistance comparison table; P34: Use the comparison deviation in a predetermined cell of the grounding resistance comparison table as the second corrosion state index.

[0042] It should be understood that the main function of the resistance timing comparison module 30 of the present application is to compare the periodic grounding resistance timing with the reference grounding resistance timing, so as to calculate and obtain a second corrosion state index.

[0043] In a specific implementation, the resistance timing comparison module 30 first introduces a timing curve strategy to perform curve fitting on the periodic grounding resistance timing and the reference grounding resistance timing respectively to obtain a periodic curve and a reference curve. This process is achieved by converting discrete grounding resistance data points into continuous curves, which is convenient for subsequent comparative analysis. The timing curve strategy can adopt polynomial fitting, spline interpolation or other mathematical methods to ensure that the curve can accurately reflect the change trend of the grounding resistance over time. The periodic curve represents the actual change of the grounding resistance within a specific period, while the reference curve is generated based on the grounding resistance data under the normal operation state of the equipment and is used as a reference for comparison.

[0044] Next, the module will obtain the corresponding grounding resistance values from the periodic curve and the reference curve at any moment. Specifically, for each time point, the module will obtain the periodic resistance value at that moment from the periodic curve and the corresponding reference resistance value from the reference curve. The purpose of this step is to perform one-to-one matching of the resistance values of the two timing curves at the same moment, providing a data basis for the subsequent comparative analysis.

[0045] Subsequently, the module reads the predetermined comparison table and fills in the comparison table in sequence by combining the obtained periodic resistance and any reference resistance. The role of the predetermined comparison table is to record the differences between the periodic resistance and the reference resistance at different time points, and to judge the abnormal situation of the resistance change through comparative analysis. The comparison table fills in the values of the periodic resistance and the reference resistance according to preset rules, which may include the absolute difference, relative difference or percentage difference of the grounding resistance value, etc. The purpose is to accurately evaluate the change range and trend of the grounding resistance.

[0046] Finally, the comparison deviation in the predetermined cell of the grounding resistance comparison table is used as the second corrosion state index. The comparison deviation refers to the difference between the periodic resistance and the reference resistance at a specific time point. This difference reflects the change degree of the grounding resistance, and thus can be used to quantify the corrosion state. The predetermined cell refers to a specific position preset in the comparison table for calculating the corrosion state index. By calculating the comparison deviation in these cells and using it as the second corrosion state index, a quantitative evaluation of the corrosion state can be achieved.

[0047] In summary, the resistance time series comparison module 30 accurately calculates the second corrosion state index by comparing the periodic grounding resistance and the reference grounding resistance, and by means of time series curve fitting, comparison table filling and deviation analysis. This process ensures the real-time monitoring of the change of the grounding resistance, and can detect potential corrosion problems of the equipment at an early stage, thereby improving the reliability and safety of the equipment operation.

[0048] Furthermore, when the resistance time series comparison module 30 executes the steps of reading the predetermined comparison table and filling in the comparison table by combining the arbitrary periodic resistance and the arbitrary reference resistance to obtain the grounding resistance comparison table, it is also used to execute the following steps: P33-1: Obtain the first-level cells of the predetermined comparison table; P33-2: Collaborate with the arbitrary periodic resistance and the arbitrary reference resistance to fill in the first-level cells to obtain the first-level filling result; P33-3: Obtain the second-level cells of the predetermined comparison table; P33-4: Use the first-level filling result as the filling reference to fill in the second-level cells to obtain the second-level filling result; P33-5: The first-level filling result and the second-level filling result form the grounding resistance comparison table. Among them, the first-level cells include the first row cells and the first column cells in the predetermined comparison table, and the second-level cells refer to all cells in the predetermined comparison table except the first-level cells.

[0049] Optionally, during the process of reading the predetermined comparison table and filling in the comparison table by combining the arbitrary periodic resistance and the arbitrary reference resistance, the resistance time series comparison module 30 will further refine the operation according to the following steps to ensure the integrity and accuracy of the grounding resistance comparison table: First, the module needs to obtain the first-level cells from a predefined comparison table. The first-level cells refer to the cells in the first row and the first column of the comparison table. These two cells are usually used to store the basic labels or title information of the comparison table. For example, the cell in the first row may contain a timestamp or a cycle number, and the cell in the first column may contain the identifier of the resistance or the reference resistance identifier. The first-level cells are usually used to describe the dimensions and indexes of the table and serve as the basis for filling in other data.

[0050] After obtaining the first-level cells, the module will fill in these first-level cells according to the values of the arbitrary cycle resistance and the arbitrary reference resistance. For example, the cells in the first row can be filled with the measured values of the cycle ground resistance in chronological order, and the cells in the first column may be filled with the reference ground resistance values. In this way, the first-level cells will serve as a reference for the comparison table to assist in the subsequent data filling and comparison work. The result of the filling is the first-level filling result, which will be used as the basis for subsequent data filling.

[0051] Next, the module will obtain the second-level cells in the comparison table. The second-level cells refer to all the other cells in the table except the first-level cells. The second-level cells contain the data on the difference between the cycle ground resistance and the reference ground resistance. These cells store the values obtained through data calculation, comparison, and analysis based on the filling result of the first-level cells.

[0052] After obtaining the second-level cells, the module will use the first-level filling result as a reference and fill in the second-level cells based on this result. Specifically, the second-level cells will record the comparison data between the cycle resistance and the reference resistance. This process calculates the corresponding deviation value or percentage difference and other indicators by comparing the difference between the cycle ground resistance and the reference ground resistance and fills them into the corresponding second-level cells. The result of the filling is the second-level filling result, and these data will show the gap between the cycle resistance and the reference resistance, providing data support for subsequent analysis.

[0053] After completing the filling of the first-level and second-level cells, the first-level filling result and the second-level filling result will jointly form a ground resistance comparison table. This table completely records the comparison of the cycle resistance and the reference resistance at different time points or under different conditions. The ground resistance comparison table not only reflects the difference between the resistance values but also provides a quantitative basis for further analyzing the corrosion state of the equipment. The data in the comparison table can be further used for calculating deviations, trend analysis, anomaly detection, etc. to help monitor the health status of the equipment.

[0054] The corrosion warning module 40 is used to issue a corrosion warning signal if the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit.

[0055] Further, before the corrosion warning module 40 issues a corrosion warning signal, it is further configured to: P41a: Obtain the historical maintenance records of the power transmission and distribution equipment, where the historical maintenance records include the first maintenance records of the first cycle; P42a: Obtain the first maintenance coefficient of the first cycle based on the first maintenance effect and the first maintenance frequency in the first maintenance records; P43a: Calibrate the first corrosion state index and the second corrosion state index with the first maintenance coefficient as the weight.

[0056] It should be understood that the function of the corrosion warning module 40 is to issue a corrosion warning signal in a timely manner when the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit. However, before issuing the warning signal, the module needs to further perform a series of steps to ensure the accuracy and reliability of the warning.

[0057] First, the module will obtain the historical maintenance records of the power transmission and distribution equipment. These maintenance records include various maintenance data of the equipment in the past maintenance cycles, especially the first maintenance records of the first cycle, that is, the data after the initial maintenance of the equipment. These historical records can include key information such as the maintenance frequency of the equipment, the specific operations of each maintenance, and the maintenance effect. These records are of great significance for understanding the corrosion state of the equipment because maintenance measures may affect the development trend of corrosion. For example, regular anti-corrosion coating maintenance may slow down the corrosion rate, while improper maintenance may lead to accelerated corrosion.

[0058] Next, based on the first maintenance effect and the first maintenance frequency in the first maintenance records, the module will calculate the first maintenance coefficient of the first cycle. The maintenance coefficient is a comprehensive evaluation of the maintenance effect and the maintenance frequency, and can reflect the maintenance effect of the equipment within a certain period of time. For example, if the maintenance effect in a certain cycle is good and the frequency is appropriate, the maintenance coefficient will be relatively high; while if the maintenance frequency is too high or the effect is not ideal, the coefficient will be relatively low. This coefficient reflects the actual influence degree of the maintenance measures on the corrosion state and can be used as the weight for subsequent calibration of the corrosion state index.

[0059] Finally, the first maintenance coefficient will be used as the weight to calibrate the first corrosion state index and the second corrosion state index. This process is to combine the maintenance coefficient with the corrosion state index and adjust the value of the corrosion state index to more accurately reflect the actual corrosion state of the equipment. Specifically, if the maintenance effect is good and the maintenance frequency is high, the first maintenance coefficient may be relatively large, and the calibrated corrosion state index will be correspondingly reduced to avoid over-warning; on the contrary, if the maintenance effect is poor or the maintenance frequency is insufficient, the first maintenance coefficient may be relatively small, and the calibrated corrosion state index will be correspondingly increased to timely reflect potential corrosion risks.

[0060] After completing the above steps, if the calibrated corrosion status index still exceeds the predetermined corrosion limit, the corrosion warning module 40 will issue a corrosion warning signal to remind the operator to inspect and repair the equipment in a timely manner. This process ensures that the corrosion warning system can not only issue warnings based on real-time data, but also make more accurate judgments by combining the historical maintenance conditions of the equipment, reducing the possibility of false alarms and missed alarms.

[0061] The corrosion emergency handling module 50 is used to perform corrosion emergency handling on the power transmission and distribution equipment according to the corrosion warning signal.

[0062] Optionally, the main function of the corrosion emergency handling module 50 of the present application is to immediately perform corresponding emergency handling on the power transmission and distribution equipment after receiving the corrosion warning signal. This module ensures that when corrosion problems occur in the equipment, timely measures can be taken to reduce the impact of corrosion on the equipment operation and ensure the safety and stability of the equipment.

[0063] When the corrosion warning signal is triggered, the corrosion emergency handling module 50 will first evaluate the current corrosion status of the equipment and the possible risks according to the preset emergency handling strategy. The emergency handling strategy usually includes a variety of countermeasures, and the specific steps are adjusted according to factors such as the working state of the equipment, the degree of corrosion, and the environmental conditions.

[0064] The module will start different types of emergency measures according to the information provided in the corrosion warning signal. For example, if the corrosion problem has not reached the level of endangering the safety of the equipment, the module may take temporary adjustment operations, such as reducing the equipment load, restricting the equipment operation time, or reducing the working intensity, to slow down the corrosion process and ensure that the equipment is protected without affecting normal operation. If the corrosion problem is more serious, the module may start more urgent measures, such as cutting off part of the power supply, stopping the equipment operation, or enabling the standby system, so as to avoid further damage to the equipment and prevent potential safety accidents.

[0065] In addition, the corrosion emergency handling module 50 may also trigger the corresponding alarm mechanism during the emergency handling process to notify the maintenance personnel or the operator to take further manual intervention measures, such as arranging professional personnel to repair the equipment or replace the damaged parts. Through this collaborative work, the corrosion emergency handling module 50 can not only provide an immediate response when corrosion problems occur in the equipment, but also provide necessary support for subsequent maintenance work, reducing the downtime and economic losses caused by equipment damage.

[0066] Generally speaking, the corrosion emergency handling module 50 ensures that the equipment can be quickly protected after the corrosion warning by promptly starting the emergency handling measures, effectively preventing the further deterioration of the equipment corrosion problem, thereby ensuring the stability and safety of the system.

[0067] In summary, the embodiments of the present application have at least the following technical effects: In the present application, the multi-source feature collection module 10 collects data based on the corrosion influence factor and generates a corrosion state index. The resistance time series intercepting module 20 monitors and intercepts the dynamic grounding resistance time series. The resistance time series comparison module 30 compares with the reference grounding resistance to obtain a second corrosion state index. The corrosion warning module 40 issues a warning signal when the index exceeds the standard, and the corrosion emergency treatment module 50 takes corresponding emergency treatment measures according to the warning signal, thereby realizing real-time monitoring and effective response to equipment corrosion.

[0068] It achieves the technical effect of real-time evaluating the corrosion state and improving the timeliness of warning through multi-source data collection and dynamic monitoring.

[0069] Embodiment 2, based on the same inventive concept as the corrosion state detection device for the grounding resistance of power transmission, transformation and distribution equipment in the foregoing embodiment, as Figure 2 shown, the present application provides a corrosion state detection method for the grounding resistance of power transmission, transformation and distribution equipment. The method in the embodiments of the present application and the device embodiments are based on the same inventive concept. Among them, the method includes: Performing multi-source feature collection on the power transmission, transformation and distribution equipment based on a predetermined corrosion influence factor to obtain a multi-source information set, and analyzing the multi-source information set to obtain a first corrosion state index; monitoring the dynamic grounding resistance time series of the power transmission, transformation and distribution equipment, and performing time series interception on the dynamic grounding resistance time series in combination with a predetermined period to obtain a periodic grounding resistance time series; comparing the periodic grounding resistance time series with the reference grounding resistance time series of the power transmission, transformation and distribution equipment to obtain a second corrosion state index; if the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit, issuing a corrosion warning signal; performing corrosion emergency treatment on the power transmission, transformation and distribution equipment according to the corrosion warning signal.

[0070] Among them, the predetermined corrosion influence factors include environmental factors, soil factors, equipment factors and operation factors.

[0071] Further, performing multi-source feature collection on the power transmission, transformation and distribution equipment based on a predetermined corrosion influence factor to obtain a multi-source information set, and analyzing the multi-source information set to obtain a first corrosion state index, includes: Extracting any factor from the predetermined corrosion influence factors; screening the multi-source information set with the any factor as a screening constraint to obtain an arbitrary characteristic parameter set; performing weighted calculation on the arbitrary characteristic parameter set to obtain an arbitrary influence coefficient; performing variant weighting processing based on the arbitrary influence coefficient to obtain the first corrosion state index.

[0072] Further, screening the multi-source information set with the any factor as a screening constraint to obtain an arbitrary characteristic parameter set, includes: If the arbitrary factor is the environmental factor, the arbitrary characteristic parameter set at least includes environmental temperature parameter, environmental humidity parameter, environmental pollution index and environmental salinity index; if the arbitrary factor is the soil factor, the arbitrary characteristic parameter set at least includes soil type, soil pH value, soil moisture content and soil microorganisms; if the arbitrary factor is the equipment factor, the arbitrary characteristic parameter set at least includes material type perishable index and surface corrosion modification index; if the arbitrary factor is the operation factor, the arbitrary characteristic parameter set at least includes current density and stray current.

[0073] Further, if the arbitrary factor is the equipment factor, the arbitrary characteristic parameter set at least includes material type perishable index and surface corrosion modification index, including: Form a set of material types of the power transmission and distribution equipment; match the first perishable index corresponding to the first material type in the material corrosion database; weight the first area ratio of the first material type and the first perishable index to obtain the material type perishable index.

[0074] Further, compare the periodic grounding resistance time series with the reference grounding resistance time series of the power transmission and distribution equipment to obtain a second corrosion state index, including: Introduce a time series curve strategy to perform curve processing on the periodic grounding resistance time series and the reference grounding resistance time series in sequence to obtain a periodic curve and a reference curve respectively; obtain any moment, and respectively match the arbitrary periodic resistance corresponding to the periodic curve and the arbitrary reference resistance corresponding to the reference curve at the arbitrary moment; read a predetermined comparison table, and fill in the predetermined comparison table in combination with the arbitrary periodic resistance and the arbitrary reference resistance to obtain a grounding resistance comparison table; use the comparison deviation in a predetermined cell in the grounding resistance comparison table as the second corrosion state index.

[0075] Further, read a predetermined comparison table, and fill in the predetermined comparison table in combination with the arbitrary periodic resistance and the arbitrary reference resistance to obtain a grounding resistance comparison table, including: Obtain the first-level cells of the predetermined comparison table; cooperate with the arbitrary periodic resistance and the arbitrary reference resistance to fill in the first-level cells to obtain a first-level filling result; obtain the second-level cells of the predetermined comparison table; use the first-level filling result as a filling reference to fill in the second-level cells to obtain a second-level filling result; the first-level filling result and the second-level filling result form the grounding resistance comparison table.

[0076] Among them, the first-level cells include the first-row cells and the first-column cells in the predetermined comparison table, and the second-level cells refer to all cells in the predetermined comparison table except the first-level cells.

[0077] Further, before issuing a corrosion warning signal when the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit value, the following steps are also included: Obtain the historical maintenance records of the power transmission and distribution equipment, where the historical maintenance records include the first maintenance records of the first cycle; obtain the first maintenance coefficient of the first cycle based on the first maintenance effect and the first maintenance frequency in the first maintenance records; and calibrate the first corrosion state index and the second corrosion state index with the first maintenance coefficient as the weight.

[0078] It should be noted that the above order of the embodiments of the present application is only for description and does not represent the superiority or inferiority of the embodiments. And the above specific embodiments of this specification have been described. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0079] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0080] This specification and the drawings are only exemplary descriptions of the present application and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these changes and modifications.

Claims

1. Detection device for corrosion state of grounding resistance of power transmission and transformation equipment, characterized in that, The device includes: A multi-source feature collection module, which is used to collect multi-source features of power transmission and distribution equipment based on a predetermined corrosion influence factor, obtain a multi-source information set, and analyze the multi-source information set to obtain a first corrosion state index; A resistance time series truncation module, which is used to monitor the dynamic grounding resistance time series of the power transmission and distribution equipment, and perform time series truncation on the dynamic grounding resistance time series in combination with a predetermined period to obtain a periodic grounding resistance time series; A resistance time series comparison module, which is used to compare the periodic grounding resistance time series with the reference grounding resistance time series of the power transmission and distribution equipment to obtain a second corrosion state index; A corrosion warning module, which is used to issue a corrosion warning signal if the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit; A corrosion emergency treatment module, which is used to perform corrosion emergency treatment on the power transmission and distribution equipment according to the corrosion warning signal.

2. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 1, wherein, In the multi-source feature collection module, the predetermined corrosion influence factors include environmental factors, soil factors, equipment factors, and operation factors.

3. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 2, wherein, When the multi-source feature collection module performs multi-source feature collection on power transmission and distribution equipment based on a predetermined corrosion influence factor, obtains a multi-source information set, and analyzes the multi-source information set to obtain a first corrosion state index, it is further used for: Extracting any factor from the predetermined corrosion influence factors; Using the any factor as a screening constraint to screen the multi-source information set to obtain an any feature parameter set; Performing weighted calculation on the any feature parameter set to obtain an any influence coefficient; Performing variant weighting processing based on the any influence coefficient to obtain the first corrosion state index.

4. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 3, characterized in that, When the multi-source feature collection module performs screening on the multi-source information set using the any factor as a screening constraint to obtain an any feature parameter set, it is further used for: If the any factor is the environmental factor, the any feature parameter set at least includes environmental temperature parameter, environmental humidity parameter, environmental pollution index, and environmental salinity index; If the any factor is the soil factor, the any feature parameter set at least includes soil type, soil pH value, soil moisture content, and soil microorganisms; If the any factor is the equipment factor, the any feature parameter set at least includes a perishable index of material type and a surface corrosion modification index; If the any factor is the operation factor, the any feature parameter set at least includes current density and stray current.

5. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 4, characterized in that If the any factor is the equipment factor, the any feature parameter set at least includes a perishable index of material type and a surface corrosion modification index, and the multi-source feature collection module is further used for: Forming a material type set of the power transmission and distribution equipment; Matching the first perishable index corresponding to the first material type in the material type set in the material corrosion database; Weighting the first area proportion of the first material type and the first perishable index to obtain the perishable index of the material type.

6. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 1, characterized in that When the resistance time series comparison module performs comparison of the periodic grounding resistance time series with the reference grounding resistance time series of the power transmission and distribution equipment to obtain a second corrosion state index, it is further used for: Introduce a timing curve strategy to perform curve processing on the periodic grounding resistance timing and the reference grounding resistance timing in sequence, and obtain a periodic curve and a reference curve respectively; Obtain any moment, and respectively match any periodic resistance corresponding to the periodic curve and any reference resistance corresponding to the reference curve at the any moment; Read a predetermined comparison table, and fill in the predetermined comparison table in combination with the any periodic resistance and the any reference resistance to obtain a grounding resistance comparison table; Take the comparison deviation in a predetermined cell in the grounding resistance comparison table as the second corrosion state index.

7. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 6, characterized in that, When the resistance timing comparison module executes reading the predetermined comparison table and filling in the predetermined comparison table in combination with the any periodic resistance and the any reference resistance to obtain a grounding resistance comparison table, it is also used for: Obtain the first-level cells of the predetermined comparison table; Cooperate with the any periodic resistance and the any reference resistance to fill in the first-level cells to obtain a first-level filling result; Obtain the second-level cells of the predetermined comparison table; Take the first-level filling result as a filling reference and fill in the second-level cells to obtain a second-level filling result; The first-level filling result and the second-level filling result form the grounding resistance comparison table.

8. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 7, characterized in that, In the resistance timing comparison module, the first-level cells include the first-row cells and the first-column cells in the predetermined comparison table, and the second-level cells refer to all cells in the predetermined comparison table except the first-level cells.

9. The corrosion state detection device for the grounding resistance of the power transmission and transformation equipment according to claim 1, wherein, Before the corrosion warning module issues a corrosion warning signal, it is also used for: Obtain the historical maintenance records of the power transmission and distribution equipment, where the historical maintenance records include the first maintenance record of the first cycle; Obtain the first maintenance coefficient of the first cycle based on the first maintenance effect and the first maintenance frequency in the first maintenance record; Calibrate the first corrosion state index and the second corrosion state index with the first maintenance coefficient as the weight.

10. A method for detecting the corrosion state of the grounding resistance of power transmission and transformation equipment, characterized in that, The method includes: Collect multi-source characteristics of the power transmission and distribution equipment based on a predetermined corrosion influence factor to obtain a multi-source information set, and analyze the multi-source information set to obtain a first corrosion state index; Monitor the dynamic grounding resistance timing of the power transmission and distribution equipment, and perform timing interception on the dynamic grounding resistance timing in combination with a predetermined period to obtain a periodic grounding resistance timing; Compare the periodic grounding resistance timing with the reference grounding resistance timing of the power transmission and distribution equipment to obtain a second corrosion state index; If the first corrosion state index or the second corrosion state index reaches a predetermined corrosion limit, issue a corrosion warning signal; Perform corrosion emergency treatment on the power transmission and distribution equipment according to the corrosion warning signal.

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