A power grid line fault detection method

Abstract

The application relates to the technical field of power grid detection, in particular to a power grid line fault detection method, when the environmental temperature at the position of an insulator string is in a first preset interval, a detection program is executed on the insulator string, at this time, the temperature change of the insulator string can be directly detected; when the environmental temperature at the position of the insulator string is in a second preset interval, a regulation program is executed on the insulator string, the regulation program can adjust the environmental position at the position of the insulator string from the second preset interval to the first preset interval, reduce the influence of the environmental temperature at the position of the insulator string on the insulator string, and further improve the accuracy of power grid line fault detection.

Description

Technical Field

[0001] This invention relates to the field of power grid detection technology, and more specifically to a method for detecting power grid line faults. Background Technology

[0002] With the continuous development and expansion of power systems, the safe and stable operation of power grid lines is of paramount importance. In power grid lines, insulator strings play a crucial role in insulating and supporting conductors. Currently, conventional methods for detecting faults in power grid lines often use infrared equipment to inspect insulator strings. Infrared detection primarily utilizes the infrared radiation characteristics of objects, capturing the temperature distribution of the insulator string to determine the presence of faults. For example, when an insulator string has faults such as partial discharge or current leakage, it generates heat, causing a localized temperature increase, which appears as an abnormally high-temperature area in the infrared thermal imaging image.

[0003] However, in practical applications, this conventional infrared detection method has significant limitations in high-temperature or low-temperature environments. In high-temperature environments, due to the high ambient temperature, even under normal operating conditions, the overall temperature of the insulator string may rise due to the influence of the ambient temperature. This makes it difficult to distinguish the additional heat generated at the fault location from the temperature rise caused by the ambient temperature. In this situation, it is difficult to accurately determine whether the insulator string actually has a performance problem or a fault when using conventional infrared equipment for detection. Similarly, in low-temperature environments, the temperature of the insulator string is generally low. When some faults exist, due to the limitation of the ambient temperature, the heat generated at the fault location may not be sufficient to form a significant temperature difference in infrared thermal imaging. Therefore, in high-temperature or low-temperature environments, it is impossible to accurately determine the performance of the insulator string when using conventional infrared equipment for detection. Summary of the Invention

[0004] This invention provides a method for detecting faults in power grid lines, which solves the problem that existing power grid fault detection methods cannot overcome interference from high or low temperature environments.

[0005] The present invention provides a power grid line fault detection method using the following technical solution:

[0006] A method for detecting faults in power grid lines includes the following steps:

[0007] Based on the basic configuration information of the power grid, the first parameter of the insulator string in the power grid is determined, wherein the first parameter includes at least the location information of the insulator string;

[0008] Based on the first parameters of the insulator string in the power grid, the first environmental parameters of the insulator string are obtained, wherein the first environmental parameters include at least the ambient temperature;

[0009] If the first environmental parameter of the insulator string is within the first preset range, then the detection program is executed on the insulator string;

[0010] If the first environmental parameter of the insulator string is within the second preset range, an adjustment program is executed on the insulator string. The adjustment program can adjust the first environmental parameter of the insulator string to the first preset range. There is no overlap between the first preset range and the second preset range.

[0011] Based on the detection results of the detection program, if the insulator string belongs to the first target type, a prediction program is executed on the insulator string; if the insulator string belongs to the second target type, a repair program is executed on the insulator string.

[0012] Furthermore, the testing procedure includes:

[0013] Set a first time point and a second time point for detecting the insulator string, wherein the first time point and the second time point are separated by a preset time period;

[0014] Infrared image data of the insulator string at the first and second time points are acquired, and image processing is performed on the infrared image data of the insulator string at the first and second time points.

[0015] If the difference between the grayscale value of the infrared image data of the insulator string at the first time point and the grayscale value of the infrared image data of the insulator string at the second time point is less than the first preset value, then the insulator string belongs to the first target type.

[0016] If the difference between the grayscale value of the infrared image data of the insulator string at the first time point and the grayscale value of the infrared image data of the insulator string at the second time point is greater than or equal to the first preset value, then the insulator string belongs to the second target type.

[0017] Furthermore, the testing procedure also includes:

[0018] Obtain the initial baseline profile data of the insulator string;

[0019] When the insulator string belongs to the second target type, obtain the first contour data of the insulator string;

[0020] The first contour data and the reference contour data are compared based on the second parameter. Insulator strings that match the first type of comparison result are marked as the first defect type, and insulator strings that match the second type of comparison result are marked as the second defect type. The second parameter includes at least image integrity.

[0021] Furthermore, the testing procedure also includes:

[0022] When the first contour data of the insulator string is obtained and compared with the reference contour data, the position conforms to the first type.

[0023] Furthermore, the repair procedure includes:

[0024] If the insulator string is of the first defect type, and the position that matches the first type when the first contour data of the insulator string is compared with the reference contour data is inside the insulator string, then the first replacement procedure is performed on the insulator string.

[0025] If the insulator string is of the first defect type, and the first contour data of the insulator string matches the first type when compared with the reference contour data, the position is located on the outer peripheral wall of the insulator string, then the second replacement procedure is performed on the insulator string.

[0026] If the insulator string has the second defect type, then a cleaning procedure is performed on the insulator string.

[0027] Furthermore, the first replacement procedure includes:

[0028] The insulator strings were disassembled and replaced.

[0029] Furthermore, the second replacement procedure includes:

[0030] When the insulator string is of the first defect type and the first contour data of the insulator string matches the first type when compared with the reference contour data, the position is located on the outer peripheral wall of the insulator string, the second environmental parameter of the insulator string is obtained, wherein the second environmental parameter includes at least the salt spray concentration.

[0031] If the second environmental parameter of the insulator string is within the third preset range, the insulator string is disassembled and replaced, and the surface of the replaced insulator string is coated with a protective layer, wherein the protective layer is at least silicone.

[0032] Furthermore, the cleaning procedure includes:

[0033] The insulator strings are flushed.

[0034] Furthermore, the regulatory procedures include:

[0035] If the first environmental parameter of the insulator string is greater than the maximum value of the first preset range, then the insulator string is cooled down.

[0036] If the first environmental parameter of the insulator string is less than the minimum value of the first preset range, then the insulator string is heated.

[0037] Furthermore, the prediction procedure includes:

[0038] Obtain the initial baseline profile data of the insulator string;

[0039] When the insulator string belongs to the first target type, obtain the second contour data of the insulator string;

[0040] Based on the second profile data and the reference profile data, the loss rate of the insulator string is predicted.

[0041] Schedule the execution time for the next testing procedure.

[0042] The beneficial effects of this invention are as follows: This invention provides a power grid line fault detection method. In detecting power grid line faults, insulator string faults are one of the main problems. First, based on the basic configuration information of the power grid, the location information of the insulator strings is determined, and the ambient temperature at the location of each insulator string is obtained. When the ambient temperature at the location of the insulator string is within a first preset range, a detection program is executed on the insulator string. At this time, the interference of the ambient temperature at the location of the insulator string on the temperature of the insulator string itself is low. If a fault exists in the insulator string, its temperature will change, and this temperature change can be directly detected. When the ambient temperature at the location of the insulator string is within a second preset range, a control program is executed on the insulator string. The control program can adjust the ambient position of the insulator string from the second preset range to the first preset range, reducing the influence of the ambient temperature at the location of the insulator string on the insulator string, thereby improving the accuracy of power grid line fault detection. After the ambient temperature at the location of the insulator string is adjusted to within the first preset range, the insulator string is tested again. Based on the test results, the insulator string is divided into a first target type and a second target type. When the insulator string belongs to the first target type, a prediction program is executed. When the insulator string belongs to the second target type, a repair program is executed to ensure that the insulator string has good working performance during operation and at the same time, reduce the failure rate of the power grid line. Attached Figure Description

[0043] To more clearly illustrate the technical solutions 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.

[0044] Figure 1 This is a flowchart of a power grid line fault detection method provided in an embodiment of the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0046] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0047] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, apparatuses, or units, or they may be electrical, mechanical, or other forms of connection.

[0048] like Figure 1 As shown in the figure, an embodiment of the present invention provides a method for detecting faults in power grid lines, comprising the following steps:

[0049] Based on the basic configuration information of the power grid, the first parameter of the insulator string in the power grid is determined, wherein the first parameter includes at least the location information of the insulator string.

[0050] Specifically, the basic configuration information of the power grid includes the route of the power grid lines, the construction method of the power grid lines, and the setting method of the insulator strings in the power grid lines. Based on the basic configuration information of the power grid, the first parameter of the insulator string in the power grid is determined. The first parameter is the location information of the insulator string, which includes latitude and longitude, height above the ground, etc.

[0051] Based on the first parameters of the insulator string in the power grid, the first environmental parameters of the insulator string are obtained, wherein the first environmental parameters include at least the ambient temperature.

[0052] Specifically, a power grid typically uses multiple insulator strings, arranged according to the requirements of the grid line's route. These insulator strings play a crucial role in insulating and supporting the conductors. After determining the location information of the insulator strings, the first environmental parameter, namely ambient temperature, is obtained. Different insulator strings have different first environmental parameters due to their different locations. For example, when a power grid transmits electricity through valleys, the ambient temperature of the insulator strings at different valley locations will vary. This first environmental parameter is obtained by installing a temperature sensor around each insulator string, which accurately measures the ambient temperature at its location.

[0053] If the first environmental parameter of the insulator string is within the first preset range, then the detection program is executed on the insulator string.

[0054] Specifically, the ambient temperature within the first preset range has a low degree of interference with the temperature of the insulator string itself, and temperature changes in the insulator string can be directly reflected. Once a fault occurs in the insulator string, its temperature will fluctuate upwards. Therefore, when the first environmental parameter of the insulator string is within the first preset range, a detection program is executed on the insulator string. The detection program can detect the temperature of the insulator string, thereby detecting whether a fault exists. For example, if the temperature in the first preset range is 20-25℃, the influence of ambient temperature on the insulator string is lowest when the ambient temperature at the location of the insulator string is between 20-25℃.

[0055] Furthermore, the value of the first preset interval is obtained through experiments. In the experiments, the insulator string is placed in an environment with a preset temperature, the insulator string is connected to a high-voltage line, the insulator string is subjected to destructive treatment, and the high-voltage line is intermittently powered. During the operation of the insulator string, the preset temperature is continuously adjusted to obtain the ambient temperature at which the temperature of the insulator string can rise rapidly, thereby determining the value of the first preset interval.

[0056] If the first environmental parameter of the insulator string is within the second preset range, an adjustment program is executed on the insulator string. The adjustment program can adjust the first environmental parameter of the insulator string to the first preset range. There is no overlap between the first preset range and the second preset range.

[0057] Specifically, if there is an overlap between the first preset interval and the second preset interval, then the second preset interval is the maximum value greater than the first preset interval and the minimum value less than the first preset interval. When the ambient temperature at the location of the insulator string is within the second preset interval, if the insulator string has a fault, the ambient temperature at the location of the insulator string may affect the temperature change of the insulator string. For example, if the ambient temperature at the location of the insulator string is 10 degrees Celsius, when the insulator string has a fault, the insulator string wants to rise in temperature. However, due to the interference of the ambient temperature, the rising temperature of the insulator string quickly diffuses into the ambient environment. At this time, the temperature change of the insulator string caused by the fault cannot be directly reflected. Therefore, when the first environmental parameter of the insulator string is within the second preset interval, an adjustment program is executed on the insulator string. The adjustment program can adjust the first environmental parameter of the insulator string to the first preset interval. When the first environmental parameter of the insulator string is adjusted to the first preset interval, the detection program is executed on the insulator string again, thereby improving the accuracy of the insulator string detection.

[0058] Furthermore, the second preset interval is determined by the first preset interval. After the first preset interval is obtained through experimentation, the second preset interval can also be determined.

[0059] Based on the detection results of the detection program, if the insulator string belongs to the first target type, a prediction program is executed on the insulator string; if the insulator string belongs to the second target type, a repair program is executed on the insulator string.

[0060] Specifically, the detection program detects the insulator string when the first environmental parameter is within a first preset range. The detection results are of two types: a first target type and a second target type. When the insulator string belongs to the first target type, a prediction program is executed; when it belongs to the second target type, a repair program is executed. Further, the detection results for the insulator string are of two types: faulty and non-faulty. In this embodiment, the non-faulty type is the first target type, and the faulty type is the second target type. When the insulator string is faulty, a repair program is executed to restore its original insulation and support performance. When the insulator string is not faulty, a prediction program is executed to predict the duration for which the insulator string will maintain its insulation and support performance.

[0061] This invention provides a method for detecting faults in power grid lines. In detecting power grid line faults, insulator string faults are one of the main problems. First, based on the basic configuration information of the power grid, the location information of the insulator strings is determined, and the ambient temperature at each insulator string's location is obtained. When the ambient temperature at the insulator string's location is within a first preset range, a detection program is executed on the insulator string. At this time, the interference of the ambient temperature at the insulator string's location on the insulator string's own temperature is low; if a fault exists in the insulator string, its temperature will change, and this temperature change can be directly detected. When the ambient temperature at the insulator string's location is within a second preset range, a control program is executed on the insulator string. This control program can adjust the ambient temperature at the insulator string's location from the second preset range to the first preset range, reducing the influence of the ambient temperature on the insulator string and thus improving the accuracy of power grid line fault detection. After the ambient temperature at the location of the insulator string is adjusted to within the first preset range, the insulator string is tested again. Based on the test results, the insulator string is divided into a first target type and a second target type. When the insulator string belongs to the first target type, a prediction program is executed. When the insulator string belongs to the second target type, a repair program is executed to ensure that the insulator string has good working performance during operation and at the same time, reduce the failure rate of the power grid line.

[0062] In one embodiment, the detection procedure includes:

[0063] Set a first time point and a second time point for detecting the insulator string, wherein the first time point and the second time point are separated by a preset time period;

[0064] Infrared image data of the insulator string at the first and second time points are acquired, and image processing is performed on the infrared image data of the insulator string at the first and second time points.

[0065] If the difference between the grayscale value of the infrared image data of the insulator string at the first time point and the grayscale value of the infrared image data of the insulator string at the second time point is less than the first preset value, then the insulator string belongs to the first target type.

[0066] If the difference between the grayscale value of the infrared image data of the insulator string at the first time point and the grayscale value of the infrared image data of the insulator string at the second time point is greater than or equal to the first preset value, then the insulator string belongs to the second target type.

[0067] Specifically, when the first environmental parameter of the insulator string is within the first preset range, a detection program is executed on the insulator string. When executing the detection program, a first time point and a second time point for detecting the insulator string are first set, and a preset time period is spaced between the first time point and the second time point. The preset time period is 10 minutes or more. If there is a fault in the insulator string, when detecting the insulator string at the first time point and the second time point, it is ensured that the insulator string has sufficient time to undergo temperature changes, thereby improving the accuracy of the detection of the insulator string.

[0068] Furthermore, infrared image data of the insulator string is acquired at a first time point and at a second time point. Image processing is performed on the infrared image data at the first and second time points, including grayscale processing of the image data and analysis of the grayscale value of each pixel.

[0069] Furthermore, the infrared image data of the insulator string acquired at the first time point is defined as the first image data, and the infrared image data of the insulator string acquired at the second time point is defined as the second image data. After image processing of the first and second image data, a comparative analysis is performed. The grayscale values ​​of the first and second image data at a certain location are compared. If there is a difference in the grayscale values ​​of the first and second image data at the same location, and the difference is less than a first preset value, then the insulator string belongs to the first target type, meaning there is no fault in the insulator string at that location. If there is a difference in the grayscale values ​​of the first and second image data at the same location, and the difference is greater than or equal to the first preset value, then the insulator string belongs to the second target type, meaning there is a fault in the insulator string at that location.

[0070] Furthermore, the infrared image data of the insulator string is acquired by taking pictures with an infrared camera. To improve the accuracy of the infrared image data of the insulator string, a drone carrying an infrared camera is used to take close-up pictures of the insulator string. The detection program also includes a control center. The infrared image data acquired by the drone can be transmitted to the control center, which can compare and analyze the first image data and the second image data.

[0071] In one embodiment, the detection procedure further includes:

[0072] Obtain the initial baseline profile data of the insulator string;

[0073] When the insulator string belongs to the second target type, obtain the first contour data of the insulator string;

[0074] The first contour data and the reference contour data are compared based on the second parameter. Insulator strings that match the first type of comparison result are marked as the first defect type, and insulator strings that match the second type of comparison result are marked as the second defect type. The second parameter includes at least image integrity.

[0075] Specifically, when it is determined that the insulator string belongs to the second target type, but the specific fault type of the insulator string cannot be determined, the initial reference contour data of the insulator string is first obtained. This initial reference contour data is obtained during the installation of the insulator string and includes both the internal and external contours of the insulator string. The data is obtained using ultrasonic waves. To improve the accuracy of obtaining the initial reference contour data, a drone carrying an ultrasonic probe is used to contact and acquire the data from the insulator string.

[0076] Furthermore, when the insulator string belongs to the second target type, the first contour data of the insulator string is acquired. Specifically, the first contour data of the insulator string is still acquired by ultrasonic waves. After the control center analyzes the first image data and the second image data, if the insulator string belongs to the second target type, the control center directly controls the UAV to acquire the first contour data of the insulator string at that location. The UAV carries an ultrasonic probe to contact the insulator string to acquire the data. When the ultrasonic probe contacts the insulator string, the first contour data of the insulator string can be transmitted to the control center.

[0077] Furthermore, the first contour data and the reference contour data are compared based on the second parameter. When the second parameter is image integrity, the comparison is also performed based on image integrity. Insulator strings matching the first type are marked as first defect type, and insulator strings matching the second type are marked as second defect type. By comparing the first contour data and the reference contour data, the fault type of the insulator string of the second target type can be clearly identified, facilitating subsequent targeted processing. Furthermore, the first type is defined as a difference between the first contour data and the reference contour data, while the second type is defined as no difference between the first contour data and the reference contour data.

[0078] In one embodiment, the detection procedure further includes:

[0079] When the first contour data of the insulator string is obtained and compared with the reference contour data, the position conforms to the first type.

[0080] Specifically, the reference contour data includes the internal and external contours of the insulator string. Correspondingly, the first contour data includes the internal and external contours of the insulator string. The first type is that there is a difference between the first contour data and the reference contour data. When comparing the first contour data and the reference contour data of the insulator string, the specific location of the difference between the first contour data and the reference contour data is identified so as to facilitate subsequent targeted processing of the insulator string.

[0081] In one embodiment, the repair procedure includes:

[0082] If the insulator string is of the first defect type, and the position that matches the first type when the first contour data of the insulator string is compared with the reference contour data is inside the insulator string, then the first replacement procedure is performed on the insulator string.

[0083] If the insulator string is of the first defect type, and the first contour data of the insulator string matches the first type when compared with the reference contour data, the position is located on the outer peripheral wall of the insulator string, then the second replacement procedure is performed on the insulator string.

[0084] If the insulator string has the second defect type, then a cleaning procedure is performed on the insulator string.

[0085] Specifically, when the insulator string is of the first defect type, there is a difference between the first contour data of the insulator string and the reference contour data. The position where the first contour data and the reference contour data differ is located in the inner contour of the insulator string. At this time, the first replacement procedure is performed on the insulator string. The insulator string can no longer be used. The first replacement procedure is to directly disassemble and replace the insulator string.

[0086] Furthermore, when the insulator string is classified as having the second defect type, there is a difference between the first contour data and the reference contour data of the insulator string. The location where the difference between the first contour data and the reference contour data is within the outer contour of the insulator string is in this case. At this time, the second replacement procedure is performed on the insulator string, and the insulator string can no longer be used. When the second replacement procedure replaces the insulator string, it is necessary to clarify the cause of the damage to the insulator string in order to extend the service life of the insulator string.

[0087] Furthermore, if the insulator string is of the second defect type, there is no difference between the first profile data of the insulator string and the reference profile data. In this case, the reason for the temperature change of the insulator string is the flashover of the insulator string. At this time, a cleaning procedure is performed on the insulator string to remove the impurities attached to the surface of the insulator string.

[0088] Furthermore, the cleaning procedure involves rinsing the insulator strings. Specifically, the rinsing method for the insulator strings involves integrating a water sprayer on the drone. The water sprayer can be controlled by the control center. When there is no difference between the first contour data of the insulator string and the reference contour data, the control center controls the water sprayer to intermittently spray water onto the surface of the insulator string, thereby cleaning the impurities attached to the surface of the insulator string.

[0089] In one embodiment, the second replacement procedure includes:

[0090] When the insulator string is of the first defect type and the first contour data of the insulator string matches the first type when compared with the reference contour data, the position is located on the outer peripheral wall of the insulator string, the second environmental parameter of the insulator string is obtained, wherein the second environmental parameter includes at least the salt spray concentration.

[0091] If the second environmental parameter of the insulator string is within the third preset range, the insulator string is disassembled and replaced, and the surface of the replaced insulator string is coated with a protective layer, wherein the protective layer is at least silicone.

[0092] Specifically, defects on the outer perimeter of an insulator string are generally caused by corrosion. In coastal cities, insulator strings are easily corroded by salt spray during power grid construction. The second environmental parameter of the insulator string is obtained using a salt spray sensor. Specifically, the salt spray sensor is mounted on a drone. When the insulator string exhibits the first defect type, and the first contour data of the insulator string matches the reference contour data at a location on the outer perimeter of the insulator string, the control center activates the salt spray sensor to accurately determine the salt spray concentration at that location.

[0093] Furthermore, if the second environmental parameter of the insulator string is within a third preset range, where the third preset range is set to a concentration greater than 5%, and the salt spray concentration at the location of the insulator string is greater than 5%, special protection is required for the insulator string. In this case, a protective layer is coated onto the surface of the replaced insulator string. This protective layer is at least silicone, which can form a protective film on the surface of the insulator string, preventing direct contact between salt in the salt spray and the insulator string, thereby slowing down the corrosion process. In other embodiments, the protective layer can also be a fluorocarbon material, which can form a protective film on the surface of the insulator string, preventing direct contact between salt in the salt spray and the insulator string.

[0094] In one embodiment, the control procedure includes:

[0095] If the first environmental parameter of the insulator string is greater than the maximum value of the first preset range, then the insulator string is cooled down.

[0096] If the first environmental parameter of the insulator string is less than the minimum value of the first preset range, then the insulator string is heated.

[0097] Specifically, when the first environmental parameter of the insulator string is within the second preset range, and the ambient temperature at the location of the insulator string is within the second preset range, if there is a fault in the insulator string, the ambient temperature at the location of the insulator string may affect the temperature change of the insulator string. When the first preset range is 20-25℃, the second preset range is greater than 25℃ or less than 20℃.

[0098] Furthermore, when the first environmental parameter of the insulator string is greater than the maximum value of the first preset range, and the ambient temperature at the location of the insulator string is greater than 25°C, the insulator string is cooled down. Specifically, the cooling method for the insulator string is to use the fan blades of the drone to increase the airflow speed around the insulator string, thereby increasing the cooling efficiency of the insulator string and ensuring that the ambient temperature at the location of the insulator string is reduced to within the first preset range.

[0099] Furthermore, when the first environmental parameter of the insulator string is less than the minimum value of the first preset range, and the ambient temperature at the location of the insulator string is less than 20°C, the insulator string is heated. Specifically, a heating wire is installed on the drone, and the heating method of the insulator string is to use the power supply of the drone to control the heating wire to heat up. The heat from the heating wire heats up the ambient temperature at the location of the insulator string, ensuring that the ambient temperature at the location of the insulator string rises to within the first preset range.

[0100] In one embodiment, the prediction procedure includes:

[0101] Obtain the initial baseline profile data of the insulator string;

[0102] When the insulator string belongs to the first target type, obtain the second contour data of the insulator string;

[0103] Based on the second profile data and the reference profile data, the loss rate of the insulator string is predicted, and the execution time of the next inspection procedure is determined.

[0104] Specifically, the initial reference contour data of the insulator string is obtained during the installation of the insulator string. The reference contour data includes the internal and external contours of the insulator string and is obtained by ultrasonic means. To improve the accuracy of obtaining the initial reference contour data of the insulator string, a drone carrying an ultrasonic probe is used to contact the insulator string to obtain the data.

[0105] When the insulator string belongs to the first target type, the difference in grayscale values ​​between the first image data and the second image data at the same location is less than the first preset value, and the insulator string at that location does not exhibit any heating. In this case, the second contour data of the insulator string is acquired using ultrasonic waves. After the control center analyzes the first and second image data, if the insulator string belongs to the first target type, the control center directly controls the drone to acquire the second contour data of the insulator string at that location. The drone carries an ultrasonic probe to contact the insulator string and acquire the data. When the ultrasonic probe contacts the insulator string, the second contour data of the insulator string can be transmitted to the control center.

[0106] Furthermore, based on the second contour data and the reference contour data, a comparative analysis is performed on the second contour data and the reference contour data to determine the differences between them. At the same time, by combining the time point of acquiring the second contour data with the time point of installing the insulator string, the daily loss of the insulator string is predicted, that is, the loss rate of the insulator string is predicted. Based on the predicted loss rate of the insulator string, the execution time of the next inspection procedure is determined, thereby determining the approximate time of insulator string damage, and thus ensuring that the staff can repair the insulator string in a timely manner.

[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting faults in power grid lines, characterized in that, Includes the following steps: Based on the basic configuration information of the power grid, the first parameter of the insulator string in the power grid is determined. The first parameter includes at least the location information of the insulator string, which includes latitude and longitude and height above the ground. Based on the first parameters of the insulator string in the power grid, the first environmental parameters of the insulator string are obtained, wherein the first environmental parameters include at least the ambient temperature; If the first environmental parameter of the insulator string is within the first preset range, then the detection program is executed on the insulator string; If the first environmental parameter of the insulator string is within the second preset range, a control program is executed on the insulator string. The control program includes: if the first environmental parameter of the insulator string is greater than the maximum value of the first preset range, the insulator string is cooled down; if the first environmental parameter of the insulator string is less than the minimum value of the first preset range, the insulator string is heated. The control program can adjust the first environmental parameter of the insulator string to a first preset range; wherein the first preset range and the second preset range do not overlap; the ambient temperature in the first preset range has a low degree of interference with the temperature change of the insulator string itself; When the first environmental parameter of the insulator string is within the first preset range, the detection result has a first target type and a second target type. The first target type is a non-fault type, and the second target type is a fault type. Based on the detection result of the detection program, if the insulator string belongs to the first target type, a prediction program is executed on the insulator string; if the insulator string belongs to the second target type, a repair program is executed on the insulator string. The testing procedure includes: Set a first time point and a second time point for detecting the insulator string, wherein the first time point and the second time point are separated by a preset time period; Infrared image data of the insulator string at the first and second time points are acquired, and image processing is performed on the infrared image data of the insulator string at the first and second time points. If the difference between the grayscale value of the infrared image data of the insulator string at the first time point and the grayscale value of the infrared image data of the insulator string at the second time point is less than the first preset value, then the insulator string belongs to the first target type. If the difference between the grayscale value of the infrared image data of the insulator string at the first time point and the grayscale value of the infrared image data of the insulator string at the second time point is greater than or equal to the first preset value, then the insulator string belongs to the second target type. The testing procedure also includes: Obtain the initial reference profile data of the insulator string, which includes the internal and external profiles of the insulator string; When the insulator string belongs to the second target type, obtain the first contour data of the insulator string; Based on the second parameter, the first contour data and the reference contour data are compared. Insulator strings whose comparison results match the first type are marked as the first defect type, and insulator strings whose comparison results match the second type are marked as the second defect type. The second parameter includes at least image integrity. The first type is when there is a difference between the first contour data and the reference contour data, and the second type is when there is no difference between the first contour data and the reference contour data. When comparing the first contour data of the insulator string with the reference contour data, the position conforms to the first type. The fix includes: If the insulator string is of the first defect type, and the first contour data of the insulator string matches the first type when compared with the reference contour data, the position is located on the outer peripheral wall of the insulator string, then the second replacement procedure is performed on the insulator string. The second replacement procedure includes: Obtain the second environmental parameters of the insulator string, wherein the second environmental parameters include at least the salt spray concentration; If the second environmental parameter of the insulator string is within the third preset range, the insulator string is disassembled and replaced, and the surface of the replaced insulator string is coated with a protective layer, wherein the protective layer is at least silicone. If the insulator string is of the first defect type, and the position that matches the first type when the first contour data of the insulator string is compared with the reference contour data is inside the insulator string, then the first replacement procedure is performed on the insulator string. The first replacement procedure includes disassembling and replacing the insulator strings; If the insulator string has the second defect type, then a cleaning procedure is performed on the insulator string.

2. The method for detecting faults in power grid lines according to claim 1, characterized in that, The cleaning procedure includes: The insulator strings are flushed.

3. The method for detecting faults in power grid lines according to claim 1, characterized in that, The prediction process includes: Obtain the initial baseline profile data of the insulator string; When the insulator string belongs to the first target type, obtain the second contour data of the insulator string; Based on the second profile data and the reference profile data, the loss rate of the insulator string is predicted. Schedule the execution time for the next testing procedure.

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