Power grid line fault detection method

Abstract

The invention relates to the technical field of power grid detection, in particular to a power grid line fault detection method, and the method comprises the steps: executing a detection program for an insulator string when the environment temperature of the position where the insulator string is located is in a first preset interval, and enabling the temperature change of the insulator string to be directly detected; when the environment temperature of the position where the insulator chain is located is in the second preset interval, a regulation and control program is executed on the insulator chain, the regulation and control program can adjust the environment position of the position where the insulator chain is located to the first preset interval from the second preset interval, and the influence of the environment temperature of the position where the insulator chain is located on the insulator chain is reduced; and thus, the accuracy of power grid line fault detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid detection, and in particular to a power grid line fault detection method. Background Art

[0002] With the continuous development and expansion of the power system, the safe and stable operation of power grid lines is of vital importance. In power grid lines, insulator strings play a key role in insulating and supporting conductors. At present, in conventional power grid line fault detection methods, infrared equipment is often used to detect insulator strings. Infrared detection mainly uses the infrared radiation characteristics of objects to capture the temperature distribution of insulator strings to determine whether there is a fault. For example, when there are faults such as local discharge and current leakage in the insulator string, heat will be generated, resulting in a local temperature increase, which will appear as an abnormally high temperature area in the infrared thermal imaging image.

[0003] However, in actual applications, this conventional infrared detection method has obvious limitations in high or low temperature weather environments. In high temperature environments, due to the high ambient temperature itself, the overall temperature of the insulator string may rise due to the influence of the ambient temperature even in normal operation, which makes it difficult to distinguish the additional heat generated by the faulty part from the temperature rise caused by the ambient temperature. In this case, when using conventional infrared equipment for detection, it is difficult to accurately determine whether the insulator string actually has performance problems or faults. Similarly, in low temperature environments, the temperature of the insulator string is generally low, and when there are some faults, due to the limitation of the ambient temperature, the heat generated at the faulty part may not be enough to form an obvious temperature difference in infrared thermal imaging. In high or low temperature weather environments, the performance of the insulator string cannot be accurately judged when using conventional infrared equipment to detect it. Summary of the invention

[0004] The present invention provides a power grid line fault detection method to solve the problem that the existing power grid fault detection method cannot overcome the interference of high temperature or low temperature environment.

[0005] A power grid line fault detection method of the present invention adopts the following technical solution: A method for detecting a power grid line fault comprises the following steps: Determine a first parameter of an insulator string in the power grid based on basic configuration information of the power grid, wherein the first parameter at least includes position information of the insulator string; Based on a first parameter of an insulator string in a power grid, obtaining a first environmental parameter of the insulator string, wherein the first environmental parameter at least includes an ambient temperature; If the first environmental parameter of the insulator string is within a first preset range, executing a detection procedure on the insulator string; If the first environmental parameter of the insulator string is in the second preset range, a control program is executed on the insulator string, and the control program can adjust the first environmental parameter of the insulator string to the first preset range; wherein there is no overlapping area between the first preset range and the second preset range; 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.

[0006] Further, the testing procedure includes: Setting a first time point and a second time point for detecting the insulator string, wherein a preset time period is spaced between the first time point and the second time point; Acquire infrared image data of the insulator string at a first time point and a second time point, and perform image processing on the infrared image data of the insulator string at the first time point and the second time point; 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 a first preset value, 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, the insulator string belongs to the second target type.

[0007] Furthermore, the testing procedure also includes: Obtaining the initial reference profile data of the insulator string; When the insulator string belongs to the second target type, obtaining first contour data of the insulator string; The first contour data is compared with the reference contour data based on the second parameter, and the insulator string whose comparison result matches the first type is marked as the first defect type, and the insulator string whose comparison result matches the second type is marked as the second defect type; wherein the second parameter at least includes image integrity.

[0008] Furthermore, the testing procedure also includes: The first contour data of the insulator string is obtained, and when compared with the reference contour data, the position conforming to the first type is obtained.

[0009] Further fixes include: If the insulator string is of the first defect type, and the position that meets the first type when the first profile data of the insulator string is compared with the reference profile data is inside the insulator string, a first replacement procedure is performed on the insulator string; If the insulator string is of the first defect type, and the position that meets the first defect type when the first profile data of the insulator string is compared with the reference profile data is located on the outer peripheral wall of the insulator string, a second replacement procedure is performed on the insulator string; If the insulator string has the second defect type, a cleaning procedure is performed on the insulator string.

[0010] Further, the first replacement procedure includes: Disassemble and replace the insulator string.

[0011] Furthermore, the second replacement procedure includes: When the insulator string is of the first defect type and the position that meets the first defect type when the first profile data of the insulator string is compared with the reference profile data is located on the outer peripheral wall of the insulator string, obtaining the second environmental parameter of the insulator string, wherein the second environmental parameter at least includes 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 a protective layer is coated on the surface of the replaced insulator string, wherein the protective layer is at least silicone.

[0012] Further, the cleaning procedure includes: Flush the insulator string.

[0013] Furthermore, the control procedure includes: If the first environmental parameter of the insulator string is greater than the maximum value of the first preset interval, cooling the insulator string; If the first environmental parameter of the insulator string is less than a minimum value of the first preset interval, the insulator string is heated.

[0014] Furthermore, the prediction procedure includes: Obtaining the initial reference profile data of the insulator string; When the insulator string belongs to the first target type, obtaining second contour data of the insulator string; Predicting the loss rate of the insulator string based on the second profile data and the reference profile data; Plan the execution time of the next inspection procedure.

[0015] The beneficial effects of the present invention are as follows: a power grid line fault detection method provided by the present invention, when detecting power grid line faults, insulator string faults are one of the main problems of power grid line faults, firstly, the position information of the insulator string is determined based on the basic configuration information of the power grid, and the ambient temperature of the position where each insulator string is located is obtained, when the ambient temperature of the position where the insulator string is located is in a first preset interval, a detection program is executed on the insulator string, at this time, the ambient temperature of the position where the insulator string is located has a low degree of interference with the temperature of the insulator string itself, if there is a fault in the insulator string, the temperature of the insulator string will change, at this time, the temperature change of the insulator string can be directly detected; when the ambient temperature of the position where the insulator string is located is in a second preset interval, a control program is executed on the insulator string, and the control program can adjust the ambient position of the position where the insulator string is located from the second preset interval to the first preset interval, reduce the influence of the ambient temperature of the position where the insulator string is located on the insulator string, and thus improve 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 detection program is executed on the insulator string again, and the insulator string is divided into a first target type and a second target type according to the detection result of the detection program. When the insulator string belongs to the first target type, the prediction program is executed on the insulator string, and when the insulator string belongs to the second target type, the repair program is executed on the insulator string to ensure that the insulator string can have good working performance when working, and at the same time, reduce the failure rate of the power grid line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A flow chart of a power grid line fault detection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is 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 only used to explain the present invention and are not used to limit the present invention.

[0019] 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 may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0020] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or it can be an electrical, mechanical or other form of connection.

[0021] like Figure 1 As shown, a method for detecting a power grid line fault provided by an embodiment of the present invention comprises the following steps: Based on basic configuration information of the power grid, a first parameter of an insulator string in the power grid is determined, wherein the first parameter at least includes position information of the insulator string.

[0022] Specifically, the basic configuration information of the power grid includes the direction of the power grid lines, the construction method of the power grid lines, the setting method of the insulator strings in the power grid lines, etc. According to 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 is the location information of the insulator string, and the location information of the insulator string includes longitude and latitude, height from the ground, etc.

[0023] Based on a first parameter of an insulator string in a power grid, a first environmental parameter of the insulator string is acquired, wherein the first environmental parameter at least includes an ambient temperature.

[0024] Specifically, there are multiple insulator strings in the power grid, and the multiple insulator strings are set according to the direction requirements of the power grid line. In the power grid line, the insulator string plays a key role in insulating and supporting the conductor. After clarifying the position information of the insulator string in the power grid, the first environmental parameter of the insulator string is obtained, wherein the first environmental parameter is the ambient temperature. If the position information of different insulator strings is different, then the first environmental parameters of different insulator strings are different. When the first environmental parameter of the insulator string is the ambient temperature, the ambient temperatures of the insulator strings at different positions are different. For example, when the power grid line transmits electric energy between valleys, the ambient temperatures of the insulator strings at different valley positions are different. The way to obtain the first environmental parameter of the insulator string is to set up a temperature sensor around each insulator string, and the temperature sensor can accurately obtain the ambient temperature of the position where the insulator string is located.

[0025] If the first environmental parameter of the insulator string is within a first preset range, a detection procedure is performed on the insulator string.

[0026] Specifically, the ambient temperature in the first preset interval has a low degree of interference with the temperature of the insulator string itself, and the temperature change of the insulator string can be directly reflected. Once the insulator string fails, the temperature of the insulator string will fluctuate upward. When the first environmental parameter of the insulator string is in the first preset interval, the detection program is executed on the insulator string, and the detection program can detect the temperature of the insulator string to detect whether the insulator string has a fault. For example, the temperature of the first preset interval is 20-25°C. When the ambient temperature at the location of the insulator string is between 20-25°C, the influence of the ambient temperature on the insulator string is the lowest.

[0027] Furthermore, the value of the first preset interval is obtained through experiments. In the experiments, the insulator string is placed in an environment of preset temperature, the insulator string is connected to a high-voltage line, the insulator string is subjected to a destruction treatment, and the high-voltage line is intermittently powered. During the operation of the insulator string, the preset temperature is continuously adjusted to obtain an ambient temperature at which the temperature of the insulator string can rise rapidly, thereby determining the value of the first preset interval.

[0028] If the first environmental parameter of the insulator string is in the second preset range, a control program is executed on the insulator string, and the control program can adjust the first environmental parameter of the insulator string to the first preset range; wherein there is no overlapping area between the first preset range and the second preset range; Specifically, there is an overlapping area between the first preset interval and the second preset interval, and the second preset interval is greater than the maximum value of the first preset interval and less than the minimum value of the first preset interval. When the ambient temperature at the location of the insulator string is within the second preset interval, 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. For example, the ambient temperature at the location of the insulator string is 10 degrees Celsius. When the insulator string fails, the insulator string wants to increase in temperature, but due to the interference of the external ambient temperature of the insulator string, the increased temperature of the insulator string quickly diffuses to the external environment. At this time, the temperature change of the insulator string caused by the fault cannot be intuitively reflected. Then, when the first environmental parameter of the insulator string is in the second preset interval, the control program is executed on the insulator string, and the control 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 within the first preset interval, the detection program is executed on the insulator string again, thereby improving the accuracy of the detection of the insulator string.

[0029] Furthermore, the second preset interval is determined by the first preset interval. After the first preset interval is obtained by experiment, the second preset interval can be determined at the same time.

[0030] 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.

[0031] Specifically, the detection program detects the insulator string when the first environmental parameter of the insulator string is within the first preset interval. There are two types of detection results for the insulator string, one of which is the first target type and the other is the second target type. When the insulator string belongs to the first target type, the prediction program is executed on the insulator string, and when the insulator string belongs to the second target type, the repair program is executed on the insulator string. Further, the detection results for the insulator string are of two types: fault and non-fault. In this embodiment, the non-fault type is the first target type and the fault type is the second target type. When there is a fault in the insulator string, the repair program is executed on the insulator string, and the repair program can restore the faulty insulator string to its original insulation and support performance. When there is no fault in the insulator string, the prediction program is executed on the insulator string, and the prediction program can predict the length of time the insulator string maintains insulation and support performance.

[0032] The present invention provides a power grid line fault detection method. When detecting power grid line faults, insulator string faults are one of the main problems of power grid line faults. First, the position information of the insulator string is determined based on the basic configuration information of the power grid, and the ambient temperature of each insulator string is obtained. When the ambient temperature of the insulator string is in a first preset interval, a detection program is executed on the insulator string. At this time, the ambient temperature of the insulator string has a low degree of interference with the temperature of the insulator string itself. If the insulator string has a fault, the temperature of the insulator string will change. At this time, the temperature change of the insulator string can be directly detected. When the ambient temperature of the insulator string is in a second preset interval, 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 interval to the first preset interval, thereby reducing the influence of the ambient temperature 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 detection program is executed on the insulator string again, and the insulator string is divided into a first target type and a second target type according to the detection result of the detection program. When the insulator string belongs to the first target type, the prediction program is executed on the insulator string, and when the insulator string belongs to the second target type, the repair program is executed on the insulator string to ensure that the insulator string can have good working performance when working, and at the same time, reduce the failure rate of the power grid line.

[0033] In one embodiment, the detection procedure includes: Setting a first time point and a second time point for detecting the insulator string, wherein a preset time period is spaced between the first time point and the second time point; Acquire infrared image data of the insulator string at a first time point and a second time point, and perform image processing on the infrared image data of the insulator string at the first time point and the second time point; 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 a first preset value, 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, the insulator string belongs to the second target type.

[0034] Specifically, when the first environmental parameter of the insulator string is in a first preset interval, 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 separated from the first time point and the second time point, wherein the preset time period is 10 minutes or more. If there is a fault in the insulator string, when the insulator string is detected at the first time point and the second time point, it is ensured that the insulator string has sufficient time for temperature changes, thereby improving the accuracy of the detection of the insulator string.

[0035] Furthermore, infrared image data of the insulator string is acquired at a first time point, infrared image data of the insulator string is acquired at a second time point, and image processing is performed on the infrared image data at the first time point and the infrared image data at the second time point, wherein the image data includes grayscale processing of the image data and analysis of the grayscale value of each pixel.

[0036] Further, 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 is performed on the first image data and the second image data, the first image data and the second image data are compared and analyzed, and the grayscale value of the first image data and the grayscale value of the second image data at a certain position are compared. If there is a difference in the grayscale value of the first image data and the second image data at the same position, and the difference in the grayscale value of the first image data and the second image data at the same position is less than a first preset value, then the insulator string is in the first target type, that is, there is no fault in the insulator string at this position. If there is a difference in the grayscale value of the first image data and the second image data at the same position, and the difference in the grayscale value of the first image data and the second image data at the same position is greater than or equal to the first preset value, then the insulator string belongs to the second target type, that is, there is a fault in the insulator string at this position.

[0037] Furthermore, the infrared image data of the insulator string is acquired by taking photos 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 photos 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, and the control center can compare and analyze the first image data and the second image data.

[0038] In one embodiment, the detection procedure further comprises: Obtaining the initial reference profile data of the insulator string; When the insulator string belongs to the second target type, obtaining first contour data of the insulator string; The first contour data is compared with the reference contour data based on the second parameter, and the insulator string whose comparison result matches the first type is marked as the first defect type, and the insulator string whose comparison result matches the second type is marked as the second defect type; wherein the second parameter at least includes image integrity.

[0039] Specifically, when it is clear that the insulator string belongs to the second target type, but the specific fault type of the insulator string cannot be determined. To clarify the fault type of the insulator string, first obtain the initial reference contour data of the insulator string, wherein the initial reference contour data of the insulator string is obtained when the insulator string is installed, wherein the reference contour data includes the internal contour and the external contour of the insulator string, and the acquisition method is ultrasonic. To improve the accuracy of obtaining the initial reference contour data of the insulator string, an ultrasonic probe carried by a drone is used to contact and obtain the insulator string.

[0040] Furthermore, when the insulator string belongs to the second target type, the first contour data of the insulator string is obtained. Specifically, the first contour data of the insulator string is obtained by ultrasonic method. 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 drone to obtain the first contour data of the insulator string at that position. The drone carries an ultrasonic probe to contact and obtain the insulator string. When the ultrasonic probe contacts the insulator string, the first contour data of the insulator string can be transmitted to the control center.

[0041] Further, the first profile data is compared with the reference profile data based on the second parameter. When the second parameter is image integrity, the first profile data is compared with the reference profile data based on the image integrity, and the insulator string whose comparison result meets the first type is marked as the first defect type, and the insulator string whose comparison result meets the second type is marked as the second defect type. By comparing the first profile data with the reference profile data, the fault type of the insulator string of the second target type can be clarified to facilitate subsequent targeted processing. Further, the first type is that there is a difference between the first profile data and the reference profile data, and the second type is that there is no difference between the first profile data and the reference profile data.

[0042] In one embodiment, the detection procedure further comprises: The first contour data of the insulator string is obtained, and when compared with the reference contour data, the position conforming to the first type is obtained.

[0043] Specifically, the reference contour data includes the internal contour and the external contour of the insulator string. Correspondingly, the first contour data includes the internal contour and the external contour 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 of the insulator string with the reference contour data, the specific location of the difference between the first contour data and the reference contour data is clarified to facilitate subsequent targeted processing of the insulator string.

[0044] In one embodiment, the repair procedure includes: If the insulator string is of the first defect type, and the position that meets the first type when the first profile data of the insulator string is compared with the reference profile data is inside the insulator string, a first replacement procedure is performed on the insulator string; If the insulator string is of the first defect type, and the position that meets the first defect type when the first profile data of the insulator string is compared with the reference profile data is located on the outer peripheral wall of the insulator string, a second replacement procedure is performed on the insulator string; If the insulator string has the second defect type, a cleaning procedure is performed on the insulator string.

[0045] Specifically, when the insulator string is of the first defect type, there is a difference when comparing the first contour data of the insulator string with the reference contour data, and the position where the first contour data differs from the reference contour data is in the internal contour of the insulator string. At this time, the first replacement procedure is executed on the insulator string. At this time, the insulator string cannot be used any more. The first replacement procedure is to directly disassemble and replace the insulator string.

[0046] Furthermore, when the insulator string is of the second defect type, there is a difference when comparing the first contour data of the insulator string with the reference contour data, and the position where the first contour data differs from the reference contour data is in the outer contour of the insulator string. At this time, the second replacement procedure is executed on the insulator string. At this time, the insulator string cannot be used any more. When the second replacement procedure replaces the insulator string, it is necessary to clarify the cause of the damage to the insulator string, thereby extending the service life of the insulator string.

[0047] Furthermore, if the insulator string is of the second defect type, there is no difference when comparing the first profile data of the insulator string with the reference profile data. At this time, the reason for the change in the temperature of the insulator string is the dirty flash of the insulator string. At this time, a cleaning procedure is performed on the insulator string, and the cleaning procedure can clean the impurities attached to the surface of the insulator string.

[0048] Furthermore, the cleaning procedure is to flush the insulator string. Specifically, the specific flushing method for the insulator string is to integrate a water sprinkler on the drone. The water sprinkler 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 sprinkler to intermittently spray water onto the surface of the insulator string, thereby cleaning impurities attached to the surface of the insulator string.

[0049] In one embodiment, the second replacement procedure includes: When the insulator string is of the first defect type and the position that meets the first defect type when the first profile data of the insulator string is compared with the reference profile data is located on the outer peripheral wall of the insulator string, obtaining the second environmental parameter of the insulator string, wherein the second environmental parameter at least includes 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 a protective layer is coated on the surface of the replaced insulator string, wherein the protective layer is at least silicone.

[0050] Specifically, when there are defects on the outer wall of the insulator string, it is generally caused by corrosion of the insulator string. When building power grid lines in coastal cities, the outside of the insulator string is susceptible to corrosion by salt spray. The second environmental parameter of the insulator string is obtained by using a salt spray sensor for detection. Specifically, the salt spray sensor is installed on a drone. When the insulator string is of the first defect type and the first contour data of the insulator string is compared with the reference contour data and the position that meets the first type is on the outer wall of the insulator string, the control center controls the salt spray sensor to work, thereby accurately obtaining the salt spray concentration at the location of the insulator string.

[0051] Furthermore, if the second environmental parameter of the insulator string is in a third preset interval, wherein the third preset interval is set to a concentration greater than 5%, when the salt spray concentration at the location of the insulator string is greater than 5%, special protection of the insulator string is required, and a protective layer is coated on the surface of the replaced insulator string, wherein the protective layer is at least silicone, and the silicone can form a protective film on the surface of the insulator string to prevent the salt in the salt spray from directly contacting the insulator string, thereby slowing down the corrosion process. In other embodiments, the protective layer can also be a fluorocarbon material, and the fluorocarbon material can form a protective film on the surface of the insulator string to prevent the salt in the salt spray from directly contacting the insulator string.

[0052] In one embodiment, the control procedure includes: If the first environmental parameter of the insulator string is greater than the maximum value of the first preset interval, cooling the insulator string; If the first environmental parameter of the insulator string is less than a minimum value of the first preset interval, the insulator string is heated.

[0053] Specifically, when the first environmental parameter of the insulator string is in the second preset interval, when the ambient temperature at the location of the insulator string is in the second preset interval, 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 interval is 20-25°C, the second preset interval is greater than 25°C or less than 20°C.

[0054] Furthermore, when the first environmental parameter of the insulator string is greater than the maximum value of the first preset interval, the ambient temperature at the location of the insulator string is greater than 25°C, the insulator string is cooled. Specifically, the insulator string is cooled by using the fan blades of the drone to increase the air flow 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 interval.

[0055] Furthermore, when the first environmental parameter of the insulator string is less than the minimum value of the first preset interval, 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 insulator string is heated by using the power supply of the drone to control the heating wire to heat up. The heat of the heating wire heats 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 interval.

[0056] In one embodiment, the prediction process includes: Obtaining the initial reference profile data of the insulator string; When the insulator string belongs to the first target type, obtaining 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, and the execution time of the next detection program is planned.

[0057] Specifically, the initial baseline contour data of the insulator string is obtained when the insulator string is installed, wherein the baseline contour data includes the internal contour and the external contour of the insulator string, and is obtained by ultrasonic means. In order to improve the accuracy of obtaining the initial baseline contour data of the insulator string, an ultrasonic probe carried by a drone is used to contact and obtain the insulator string.

[0058] When the insulator string belongs to the first target type, the difference in grayscale value between the first image data and the second image data at the same position is less than the first preset value, and the insulator string at this position does not have a heating condition. At this time, the second contour data of the insulator string is obtained. The second contour data of the insulator string is obtained by ultrasonic method. After the control center analyzes the first image data and the second image data, if the insulator string belongs to the first target type, the control center directly controls the drone to obtain the second contour data of the insulator string at this position. The drone carries an ultrasonic probe to contact and obtain the insulator string. When the ultrasonic probe contacts the insulator string, the second contour data of the insulator string can be transmitted to the control center.

[0059] Furthermore, based on the second profile data and the benchmark profile data, a comparative analysis is performed on the second profile data and the benchmark profile data to determine the difference between the second profile data and the benchmark profile data, and the daily loss of the insulator string is predicted based on the time point of obtaining the second profile data and the time point of installing the insulator string, that is, the loss rate of the insulator string is predicted. According to the predicted loss rate of the insulator string, the execution time of the next inspection program is planned, thereby determining the approximate time when the insulator string is damaged, thereby ensuring that the staff can repair the insulator string in time.

[0060] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for detecting a power grid line fault, characterized in that: The following steps are involved: Determine a first parameter of an insulator string in the power grid based on basic configuration information of the power grid, wherein the first parameter at least includes position information of the insulator string; Based on a first parameter of an insulator string in a power grid, obtaining a first environmental parameter of the insulator string, wherein the first environmental parameter at least includes an ambient temperature; If the first environmental parameter of the insulator string is within a first preset range, executing a detection procedure on the insulator string; If the first environmental parameter of the insulator string is in the second preset range, a control program is executed on the insulator string, and the control program can adjust the first environmental parameter of the insulator string to the first preset range; wherein there is no overlapping area between the first preset range and the second preset range; 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.

2. A method for detecting a power line fault according to claim 1, characterized in that: The testing procedures include: Setting a first time point and a second time point for detecting the insulator string, wherein a preset time period is spaced between the first time point and the second time point; Acquire infrared image data of the insulator string at a first time point and a second time point, and perform image processing on the infrared image data of the insulator string at the first time point and the second time point; 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 a first preset value, 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, the insulator string belongs to the second target type.

3. A method for detecting a power grid line fault according to claim 2, characterized in that: The testing procedure also includes: Obtaining the initial reference profile data of the insulator string; When the insulator string belongs to the second target type, obtaining first contour data of the insulator string; The first contour data is compared with the reference contour data based on the second parameter, and the insulator string whose comparison result matches the first type is marked as the first defect type, and the insulator string whose comparison result matches the second type is marked as the second defect type; wherein the second parameter at least includes image integrity.

4. A method for detecting a power grid line fault according to claim 3, characterized in that: The testing procedure also includes: The first contour data of the insulator string is obtained, and when compared with the reference contour data, the position conforming to the first type is obtained.

5. A method for detecting a power grid line fault according to claim 4, characterized in that: The fixes include: If the insulator string is of the first defect type, and the position that meets the first type when the first profile data of the insulator string is compared with the reference profile data is inside the insulator string, a first replacement procedure is performed on the insulator string; If the insulator string is of the first defect type, and the position that meets the first defect type when the first profile data of the insulator string is compared with the reference profile data is located on the outer peripheral wall of the insulator string, a second replacement procedure is performed on the insulator string; If the insulator string has the second defect type, a cleaning procedure is performed on the insulator string.

6. A method for detecting a power grid line fault according to claim 5, characterized in that: The first replacement procedure includes: Disassemble and replace the insulator string.

7. A method for detecting a power grid line fault according to claim 5, characterized in that: The second replacement procedure includes: When the insulator string is of the first defect type, and when the first profile data of the insulator string is compared with the reference profile data, the position that meets the first type is located on the outer peripheral wall of the insulator string, obtaining the second environmental parameter of the insulator string, wherein the second environmental parameter at least includes 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 a protective layer is coated on the surface of the replaced insulator string, wherein the protective layer is at least silicone.

8. A method for detecting a power grid line fault according to claim 5, characterized in that: The cleaning process includes: Flush the insulator string.

9. A method for detecting a power grid line fault according to claim 1, characterized in that: The regulatory procedures include: If the first environmental parameter of the insulator string is greater than the maximum value of the first preset interval, cooling the insulator string; If the first environmental parameter of the insulator string is less than a minimum value of the first preset interval, the insulator string is heated.

10. A method for detecting a power grid line fault according to claim 1, characterized in that: The forecasting process includes: Obtaining the initial reference profile data of the insulator string; When the insulator string belongs to the first target type, obtaining second contour data of the insulator string; Predicting the loss rate of the insulator string based on the second profile data and the reference profile data; Plan the execution time of the next inspection procedure.

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