A short circuit fault early warning system for lines

Abstract

The present invention discloses a short-circuit fault warning system for a line, and relates to the technical field of fault warning. The present invention comprises: a transmission line analysis unit, a short-circuit hazard prejudgment unit, a short-circuit warning module and a local database. The present invention uses a drone to intelligently adjust the distance value to the corresponding transmission line according to the voltage value of each transmission line belonging to the target area, and compensates the appearance variation coefficient of each wire of each section of the transmission line belonging to the target area to a certain value according to the distance value, thereby reducing the incidence rate of short-circuit problems caused by appearance damage of the transmission line. By performing short-circuit hazard analysis on each section of the transmission line belonging to the target area according to the rainfall status, and taking into account the hazards of wind tripping during the analysis, the incidence rate of short-circuit problems caused by wind tripping of the transmission line is reduced, thereby improving the power safety of the transmission line and improving the transmission efficiency of urban power use.

Description

Technical Field

[0001] The present invention relates to the technical field of fault early warning, and in particular to a short-circuit fault early warning system for a line. Background Art

[0002] Transmission lines are the lifeblood of many cities. However, due to environmental damage and poor management, the outer insulation of many transmission lines has been damaged to a certain extent, increasing the incidence of short circuits between transmission lines due to high-voltage arcs and other reasons, causing transmission lines to catch fire and be scrapped, thereby reducing the power safety and transmission efficiency of the city's transmission lines. Therefore, it is very necessary to provide early warning of short circuit faults for transmission lines.

[0003] Prior art, such as the invention patent application with publication number CN111695506B, discloses a method and system for early warning of wind-induced foreign object short-circuit faults on power transmission lines. The method comprises: Step 1: Collecting historical image information of wind-induced foreign object short-circuit faults; Step 2: Processing these historical images; Step 3: Creating a geographical map of channel hazard distribution based on line importance, geographic characteristics, and the wind zone distribution map of the power grid, and classifying hazard area types; Step 4: Obtaining real-time visual channel image information of the transmission line; and Step 5: Providing early warning of foreign objects on the transmission line. This invention achieves both early warning and real-time alarms for wind-induced foreign object short-circuits.

[0004] Existing technology, such as the invention patent application with publication number CN116754999A, discloses a method and system for early warning of interturn short-circuit faults in dry-type air-core reactors. The method includes: acquiring simulation data to determine a threshold for determining interturn short-circuit faults in the dry-type air-core reactor; collecting conditioned voltage and current signals from the target dry-type air-core reactor; constraining the voltage and current phase difference intervals to a preset interval; and determining that an interturn short-circuit fault has occurred in the target dry-type air-core reactor if the phase difference is greater than or equal to the threshold. This invention, which uses the phase difference to determine whether an interturn short-circuit fault has occurred in a dry-type air-core reactor, is highly accurate and easy to implement.

[0005] From the above scheme, it can be seen that the current line short-circuit warning system lacks a certain degree of attention to the hazard analysis of short circuits caused by wind-induced tripping of transmission lines. Strong winds may cause the transmission lines to swing, causing contact between different wires, thereby causing short circuit problems. Moreover, if the insulation layer of the transmission line is further deteriorated due to aging or damage under the action of wind, short circuit problems may occur between different wires of the transmission line due to high-voltage arcs even if there is no contact, thereby increasing the incidence of transmission line fires and causing the transmission line to be scrapped, thereby reducing the power safety of the transmission line and reducing the transmission efficiency of urban electricity. Summary of the Invention

[0006] The purpose of the present invention is to provide a short-circuit fault early warning system for a line, which solves the problems existing in the background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a short-circuit fault early warning system for lines, including: a transmission line analysis unit, which is used to perform appearance monitoring of each wire in each section of the transmission line belonging to the target area through a drone at the current monitoring time point, and screen out each wire with abnormal appearance and each wire to be analyzed in each section of the transmission line belonging to the target area.

[0008] The transmission line analysis unit includes: a transmission line inspection module and a transmission line appearance damage analysis module.

[0009] The transmission line inspection module is used to dispatch a drone to monitor each wire of each section of the transmission line belonging to the target area at the current monitoring time point, and obtain the appearance image of each wire of each section of the transmission line belonging to the target area.

[0010] The transmission line appearance damage analysis module is used to analyze the appearance variation coefficient of each wire in each section of the transmission line belonging to the target area, and to screen each wire with abnormal appearance and each wire to be analyzed in each section of the transmission line belonging to the target area.

[0011] The short-circuit hazard prediction unit is used to obtain the rainfall status of each section of the transmission line in the target area, and perform short-circuit threat analysis on each wire to be analyzed in each section of the transmission line in the target area according to the rainfall status. Combined with the environmental information of the area where each section of the transmission line in the target area is located, the short-circuit threat wires in each section of the transmission line in the target area are screened.

[0012] The short-circuit hazard prediction unit includes: a transmission line environment information acquisition module, a rainfall short-circuit threat analysis module, a non-rainfall short-circuit threat analysis module, and an abnormal transmission line analysis module.

[0013] The transmission line environmental information acquisition module is used to obtain the rainfall status of the area where each section of the transmission line in the target area is located during the future target monitoring time period from the meteorological management platform, thereby screening the sections of the transmission line in the target area that have rainfall and the sections of the transmission line that have not rainfall.

[0014] The non-rainfall short-circuit threat analysis module is used to obtain the wind speed, wind direction, temperature and humidity values of the area where each section of the non-rainfall transmission line in the target area is located from the meteorological management platform, analyze the short-circuit threat coefficient of each to-be-analyzed wire in each section of the non-rainfall transmission line in the target area, and screen each short-circuit-threatened wire in each section of the non-rainfall transmission line in the target area.

[0015] The rainfall short-circuit threat analysis module is used to obtain the rainfall, wind speed and wind direction of the area where each section of the rainfall transmission line in the target area is located from the meteorological management platform, analyze the short-circuit threat coefficient of each to-be-analyzed wire in each section of the rainfall transmission line in the target area, and screen out each short-circuit-threatened wire in each section of the rainfall transmission line in the target area.

[0016] The abnormal transmission line analysis module is used to summarize the short-circuit threatened wires in each section of the transmission line in the target area based on the short-circuit threatened wires in each section of the transmission line without rainfall and the short-circuit threatened wires in each section of the transmission line with rainfall.

[0017] The short circuit warning module is used to send the abnormal appearance of each wire and each short circuit threat wire in each section of the transmission line in the target area to the person in charge of transmission line maintenance.

[0018] The beneficial effects of the present invention are as follows: (1) The power transmission line analysis unit of the present invention monitors the appearance of each wire of each power transmission line in the target area by dispatching a drone. During the monitoring process, the drone intelligently adjusts the distance value with the corresponding transmission line according to the voltage value of each power transmission line in the target area, thereby ensuring that the drone will not be damaged due to excessively high voltage of the power transmission line, and compensates the appearance variation coefficient of each wire of each section of the power transmission line in the target area with a certain value according to the distance value, thereby ensuring that the power transmission line can be intelligently monitored for appearance damage while reducing the incidence of misjudgment, screening out each wire with abnormal appearance in each section of the power transmission line in the target area, thereby reducing the incidence of short circuit problems due to appearance damage of the power transmission line.

[0019] (2) The short-circuit hazard prediction unit of the present invention performs short-circuit hazard analysis on each section of the transmission line in the target area according to the rainfall status, and takes into account the hazards of wind tripping during the analysis process, thereby reducing the incidence of short-circuit problems in the transmission line due to wind tripping, and intelligently analyzes the power lines that may have short-circuit problems in the future, thereby reducing the incidence of short-circuit problems in the transmission line due to high-voltage arcs.

[0020] (3) The short-circuit warning module of the present invention can provide early warning to the person in charge of transmission line maintenance, making it easier for the person in charge of transmission line maintenance to perform short-circuit prevention operations, thereby reducing the incidence of transmission line fires and the scrap rate of transmission lines, thereby improving the power safety of transmission lines and enhancing the transmission efficiency of urban electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0022] Figure 1 Schematic diagram of the system module of the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Reference Figure 1 As shown, the present invention provides a short-circuit fault early warning system for a line, comprising: a transmission line analysis unit, a short-circuit hazard prediction unit, a short-circuit early warning module and a local database.

[0025] It should be noted that the transmission line analysis unit is connected to the short circuit hazard prediction unit, the short circuit hazard prediction unit is connected to the short circuit warning module, and the local database is connected to the transmission line analysis unit and the short circuit hazard prediction unit.

[0026] It should also be noted that the local database is used to store the appropriate distance values between the drone and the transmission line in each voltage value interval, the grayscale variation coefficient decrease compensation value of the camera carried by the drone in each appropriate distance value interval, the initial grayscale value of the wires in each section of the transmission line belonging to the target area, the appearance variation coefficient threshold, the short-circuit threat coefficient threshold of the non-rainfall transmission line, the corresponding short-circuit threat coefficient adjustment parameter value in each temperature value interval and each humidity value interval, the straight line formed by each section of the non-rainfall transmission line belonging to the target area in the direction of wire extension, the appropriate wind speed value in the vertical direction of each section of the non-rainfall transmission line belonging to the target area, the number of wires in each section of the non-rainfall transmission line belonging to the target area, the actual spacing between the wires, the length of each wire to be analyzed and the length between the poles, the lower limit of the allowable wire spacing in each voltage value interval, the short-circuit threat coefficient adjustment parameter value corresponding to each rainfall interval, the upper limit of the allowable rainfall corresponding to each appearance variation coefficient interval, and the short-circuit threat coefficient threshold of the rainfall transmission line.

[0027] The transmission line analysis unit is used to perform appearance monitoring of each wire in each section of the transmission line belonging to the target area through a drone at the current monitoring time point, and to screen out each wire with abnormal appearance and each wire to be analyzed in each section of the transmission line belonging to the target area.

[0028] In a specific embodiment of the present invention, the power transmission line analysis unit includes: a power transmission line inspection module and a power transmission line appearance damage analysis module.

[0029] The transmission line inspection module is used to dispatch a drone to monitor each wire of each section of the transmission line belonging to the target area at the current monitoring time point, and obtain the appearance image of each wire of each section of the transmission line belonging to the target area.

[0030] The transmission line appearance damage analysis module is used to analyze the appearance variation coefficient of each wire in each section of the transmission line belonging to the target area, and to screen each wire with abnormal appearance and each wire to be analyzed in each section of the transmission line belonging to the target area.

[0031] In a specific embodiment of the present invention, the appearance image of each wire of each section of the transmission line belonging to the target area is obtained by a specific acquisition method: obtaining the voltage value of each section of the transmission line belonging to the target area, the appropriate distance value between the drone and the transmission line in each voltage value interval, mapping to obtain the appropriate distance value of the drone in each section of the transmission line belonging to the target area, and controlling the drone to take all-round photography of each wire at the appropriate distance value from each section of the transmission line belonging to the target area, thereby obtaining the appearance image of each wire of each section of the transmission line belonging to the target area.

[0032] In a specific embodiment, the voltage values of each section of the transmission line belonging to the target area and the appropriate distance values between the drone and the transmission line in each voltage value interval are obtained by: obtaining the voltage values of each section of the transmission line belonging to the target area through voltage sensors installed on each section of the transmission line belonging to the target area, and obtaining the appropriate distance values between the drone and the transmission line in each voltage value interval from a local database.

[0033] In a specific embodiment of the present invention, the appearance variation coefficient of each wire in each section of the transmission line belonging to the target area is analyzed, and the specific analysis method is as follows: based on the appearance image of each section of the transmission line belonging to the target area, the grayscale value a of each pixel point of the appearance image of each wire in each section of the transmission line belonging to the target area is obtained by grayscale change. xni , where x represents the number of each transmission line section, x = 1, 2, ..., y, y is a positive integer greater than 2, n represents the number of each wire, n = 1, 2, ..., m, m is a positive integer greater than 2, and i represents the number of each pixel point, i = 1, 2, ..., j, j is a positive integer greater than 2.

[0034] The grayscale variation coefficient decrease compensation value of the camera carried by the UAV in each suitable distance value interval is obtained from the local database. According to the suitable distance value of each section of the transmission line in the target area, the appearance variation coefficient compensation adjustment parameter value c of the UAV in each section of the transmission line in the target area is mapped. x .

[0035] Obtain the initial grayscale value b of each section of the transmission line in the target area from the local database x , calculate the appearance variation coefficient of each wire in each section of the transmission line in the target area Where e is a natural constant.

[0036] In a specific embodiment, the screening of each abnormal-appearance wire and each wire to be analyzed in each section of the transmission line belonging to the target area is performed by obtaining an appearance variation coefficient threshold from a local database; if the appearance variation coefficient of a certain wire in a certain section of the transmission line belonging to the target area is greater than the appearance variation coefficient threshold, the wire is marked as an abnormal-appearance wire; otherwise, the wire is marked as a wire to be analyzed, thereby screening each abnormal-appearance wire and each wire to be analyzed in each section of the transmission line belonging to the target area.

[0037] The power transmission line analysis unit of the present invention dispatches drones to monitor the appearance of each wire in each power transmission line in the target area. During the monitoring process, the drone intelligently adjusts the distance value to the corresponding transmission line according to the voltage value of each power transmission line in the target area, thereby ensuring that the drone will not be damaged due to excessively high voltage of the power transmission line. In addition, the appearance variation coefficient of each wire in each section of the power transmission line in the target area is compensated to a certain value according to the distance value, thereby ensuring that the wires can be intelligently monitored for appearance damage while reducing the incidence of misjudgment, screening out each wire with abnormal appearance in each section of the power transmission line in the target area, thereby reducing the incidence of short circuit problems in the power transmission line due to appearance damage.

[0038] The short-circuit hazard prediction unit is used to obtain the rainfall status of each section of the transmission line belonging to the target area, and perform short-circuit threat analysis on each to-be-analyzed wire in each section of the transmission line belonging to the target area based on the rainfall status, and combine the environmental information of the area where each section of the transmission line belonging to the target area is located to screen the short-circuit threat wires in each section of the transmission line belonging to the target area.

[0039] It should be noted that the rainfall status includes: rainfall and no rainfall.

[0040] It should be noted that the environmental information of the areas where the various sections of transmission lines belonging to the target area are located includes: the wind speed value, wind direction, temperature value and humidity value of the areas where the various sections of transmission lines belonging to the target area that do not experience rainfall are located, and the rainfall amount, wind speed value and wind direction of the areas where the various sections of transmission lines belonging to the target area that experience rainfall are located.

[0041] In a specific embodiment of the present invention, the short circuit hazard prediction unit includes: a transmission line environment information acquisition module, a rainfall short circuit threat analysis module, a non-rainfall short circuit threat analysis module and an abnormal transmission line analysis module.

[0042] The transmission line environmental information acquisition module is used to obtain the rainfall status of the area where each section of the transmission line in the target area is located during the future target monitoring time period from the meteorological management platform, thereby screening the sections of the transmission line in the target area that have rainfall and the sections of the transmission line that have not rainfall.

[0043] In a specific embodiment, the screening of the sections of rainfall-induced transmission lines and the sections of non-rainfall-induced transmission lines belonging to the target area is performed by a specific screening method: if the rainfall status of the area where a section of the transmission line belonging to the target area is located is rainfall, then the section of the transmission line is marked as a rainfall-induced transmission line; otherwise, the section of the transmission line is marked as a non-rainfall-induced transmission line, thereby screening the sections of rainfall-induced transmission lines and the sections of non-rainfall-induced transmission lines belonging to the target area.

[0044] The non-rainfall short-circuit threat analysis module is used to obtain the wind speed, wind direction, temperature and humidity values of the area where each section of the non-rainfall transmission line in the target area is located from the meteorological management platform, analyze the short-circuit threat coefficient of each to-be-analyzed wire in each section of the non-rainfall transmission line in the target area, and screen each short-circuit-threatened wire in each section of the non-rainfall transmission line in the target area.

[0045] In a specific embodiment, the short-circuit-threatening wires in each section of the transmission line that has not experienced rainfall in the target area are screened by obtaining a short-circuit threat coefficient threshold value for the transmission line that has not experienced rainfall from a local database; if the short-circuit threat coefficient of a wire to be analyzed in a certain section of the transmission line that has not experienced rainfall in the target area is greater than the short-circuit threat coefficient threshold value, the wire to be analyzed is marked as a short-circuit-threatening wire, thereby screening the short-circuit-threatening wires in each section of the transmission line that has not experienced rainfall in the target area.

[0046] The rainfall short-circuit threat analysis module is used to obtain the rainfall, wind speed and wind direction of the area where each section of the rainfall transmission line in the target area is located from the meteorological management platform, analyze the short-circuit threat coefficient of each to-be-analyzed wire in each section of the rainfall transmission line in the target area, and screen out each short-circuit-threatened wire in each section of the rainfall transmission line in the target area.

[0047] The abnormal transmission line analysis module is used to summarize the short-circuit threatened wires in each section of the transmission line in the target area based on the short-circuit threatened wires in each section of the transmission line without rainfall and the short-circuit threatened wires in each section of the transmission line with rainfall.

[0048] In a specific embodiment of the present invention, the short circuit threat coefficient of each to-be-analyzed electric wire of each section of the transmission line belonging to the target area without rainfall is analyzed by a specific analysis method as follows: based on the wind speed value and wind direction of the area where each section of the transmission line belonging to the target area without rainfall is located, the wind trip threat coefficient φ of the electric wire of each section of the transmission line belonging to the target area without rainfall is analyzed. p , where p represents the number of each section of the transmission line without rainfall, p = 1, 2, ..., q, and q is a positive integer greater than 2.

[0049] According to the appearance variation coefficient of each wire in each section of the transmission line in the target area, the appearance variation coefficient A of each wire to be analyzed in each section of the transmission line in the target area without rainfall is extracted. pt , where t represents the number of each wire to be analyzed, t = 1, 2, ..., u, and u is a positive integer greater than 2.

[0050] The short-circuit threat coefficient adjustment parameter values corresponding to each temperature value interval and each humidity value interval are obtained from the local database. According to the temperature and humidity values of the area where each section of the transmission line without rainfall in the target area is located, the short-circuit threat coefficient adjustment parameter value B of each section of the transmission line without rainfall in the target area is mapped. p .

[0051] It should be noted that the higher the temperature value and the lower the humidity value, the larger the corresponding short circuit threat coefficient adjustment parameter value.

[0052] Analyze the short circuit threat coefficient of each power line to be analyzed in each section of the transmission line in the target area without rainfall

[0053]

[0054] In a specific embodiment of the present invention, the wind-induced tripping threat coefficient of the power lines of each section of the transmission line without rainfall in the target area is analyzed, and the specific analysis method is as follows: obtaining the straight lines formed by each section of the transmission line without rainfall in the target area in the extension direction of the power lines from the local database, obtaining the straight lines formed by each section of the transmission line without rainfall in the target area in the wind direction of the area where the transmission line without rainfall is located, calculating the two complementary angles and their degrees between the straight lines formed by each section of the transmission line without rainfall in the target area in the extension direction of the power lines and in the wind direction of the area where the transmission line is located, randomly selecting one of the angles as the target angle of each section of the transmission line without rainfall in the target area, and obtaining the degree g of the target angle of each section of the transmission line without rainfall in the target area.p .

[0055] Obtain the appropriate vertical wind speed value f for each section of the transmission line in the target area without rainfall from the local database p , based on the wind speed value d of the area where each section of the transmission line without rainfall belongs to the target area p , calculate the wind hazard coefficient of each section of the transmission line in the target area without rainfall

[0056]

[0057] Calculate the wire shaking accident coefficient ε for each section of the transmission line in the target area without rainfall p .

[0058] Analyze the wind-induced tripping threat coefficient φ of each section of the transmission line in the target area without rainfall p =δ p +ε p .

[0059] In a specific embodiment of the present invention, the calculation method of the wire shaking accident coefficient of each section of the transmission line in the target area without rainfall is as follows: the number of wires h in each section of the transmission line in the target area without rainfall is obtained from the local database. p , the actual spacing between wires k p , the length l of each wire to be analyzed pt and the length r between the poles p .

[0060] According to the voltage values of each section of the transmission line in the target area, the voltage values of each section of the transmission line in the target area without rainfall are extracted.

[0061] Obtain the lower limit of the allowable wire spacing under each voltage value range from the local database, and map it to obtain the lower limit of the allowable wire spacing s for each section of the transmission line in the target area without rainfall. p .

[0062] Calculate the wire shaking accident coefficient for each section of the transmission line in the target area without rainfall

[0063]

[0064] In a specific embodiment of the present invention, the short circuit threat coefficient of each to-be-analyzed electric wire of each section of the rain-induced transmission line belonging to the target area is analyzed by a specific analysis method: based on the wind speed value and wind direction of the area where each section of the rain-induced transmission line belonging to the target area is located, and according to the method of analyzing the wind-induced tripping threat coefficient of the electric wire of each section of the non-rain-induced transmission line belonging to the target area, the wind-induced tripping threat coefficient D of the electric wire of each section of the rain-induced transmission line belonging to the target area is analyzed. N, where N represents the number of each section of the rainfall transmission line, N = 1, 2, ..., M, and M is a positive integer greater than 2.

[0065] According to the appearance variation coefficient of each wire in each section of the transmission line in the target area, the appearance variation coefficient C of each wire to be analyzed in each section of the rainfall transmission line in the target area is extracted. NT , where T represents the number of each wire to be analyzed in the rainfall transmission line, T = 1, 2, ..., W, and W is a positive integer greater than 2.

[0066] The short-circuit threat coefficient adjustment parameter value corresponding to each rainfall interval is obtained from the local database. According to the rainfall in the area where each section of the rainfall transmission line belongs to the target area, the short-circuit threat coefficient adjustment parameter value E of each section of the rainfall transmission line in the target area is mapped. N .

[0067] It should be noted that the greater the rainfall, the greater the corresponding short-circuit threat coefficient adjustment parameter value.

[0068] Analyze the short circuit threat coefficient λ of each power line to be analyzed in each section of the rainfall transmission line in the target area NT =C NT +D N +E N .

[0069] In a specific embodiment of the present invention, the short-circuit threatening wires of each section of rainfall-induced power transmission line belonging to the target area are screened by a specific screening method as follows: the upper limit value of the allowable rainfall corresponding to each appearance variation coefficient interval is obtained from a local database, and the upper limit value of the allowable rainfall of each wire to be analyzed of each section of rainfall-induced power transmission line belonging to the target area is mapped based on the appearance variation coefficient of each wire to be analyzed of each section of rainfall-induced power transmission line belonging to the target area.

[0070] If the rainfall of a certain power line to be analyzed in a certain section of the rainfall transmission line in the target area is greater than the upper limit of the allowable rainfall, the power line to be analyzed will be marked as a short-circuit threat wire.

[0071] The short-circuit threat coefficient threshold of the rainfall-induced transmission line is obtained from the local database. If the short-circuit threat coefficient of a certain power line to be analyzed in a certain section of the rainfall-induced transmission line in the target area is greater than the short-circuit threat coefficient threshold, the power line to be analyzed is marked as a short-circuit threat power line.

[0072] In summary, the short-circuit threat wires of each section of rainfall transmission line in the target area are summarized.

[0073] The short-circuit hazard prediction unit of the present invention performs short-circuit hazard analysis on each section of the transmission line in the target area according to the rainfall status, and takes into account the hazards of wind tripping during the analysis process, thereby reducing the incidence of short-circuit problems in the transmission line due to wind tripping. It also intelligently analyzes the wires that may have short-circuit problems in the future, thereby reducing the incidence of short-circuit problems in the transmission line due to high-voltage arcs.

[0074] The short circuit warning module is used to send each abnormal-looking wire and each short circuit-threatening wire of each section of the transmission line in the target area to the person in charge of transmission line maintenance.

[0075] The short-circuit warning module of the present invention provides early warning to the person in charge of transmission line maintenance, making it easier for the person in charge of transmission line maintenance to perform short-circuit prevention operations, reducing the incidence of transmission line fires and the scrap rate of transmission lines, thereby improving the power safety of transmission lines and enhancing the transmission efficiency of urban electricity.

[0076] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they should all fall within the scope of protection of the present invention.

Claims

1. A short circuit fault early warning system for a line, characterized in that: include: The power transmission line analysis unit is used to monitor the appearance of each wire in each section of the power transmission line in the target area through the drone at the current monitoring time point, and to screen out each wire with abnormal appearance and each wire to be analyzed in each section of the power transmission line in the target area; The transmission line analysis unit includes: a transmission line inspection module and a transmission line appearance damage analysis module; The transmission line inspection module is configured to dispatch a drone to monitor each wire of each section of the transmission line in the target area at the current monitoring time point, and obtain an appearance image of each wire of each section of the transmission line in the target area; The transmission line appearance damage analysis module is used to analyze the appearance variation coefficient of each wire in each section of the transmission line belonging to the target area, and screen out each wire with abnormal appearance and each wire to be analyzed in each section of the transmission line belonging to the target area; The specific method for obtaining the appearance image of each wire of each section of the transmission line in the target area is as follows: Obtain the voltage values of each section of the transmission line in the target area, the appropriate distance values between the drone and the transmission line in each voltage value interval, map the appropriate distance values between the drone and each section of the transmission line in the target area, control the drone to take all-around photos of each wire at the appropriate distance value from each section of the transmission line in the target area, and thus obtain the appearance image of each wire in each section of the transmission line in the target area; The specific analysis method for analyzing the appearance variation coefficient of each wire in each section of the transmission line in the target area is as follows: According to the appearance image of each section of the transmission line in the target area, the gray value a of each pixel point of the appearance image of each wire in each section of the transmission line in the target area is obtained by grayscale change. xni , where x represents the number of each transmission line section, x = 1, 2, ..., y, y is a positive integer greater than 2, n represents the number of each wire, n = 1, 2, ..., m, m is a positive integer greater than 2, i represents the number of each pixel, i = 1, 2, ..., j, j is a positive integer greater than 2; The grayscale variation coefficient decrease compensation value of the camera carried by the UAV in each suitable distance value interval is obtained from the local database. According to the suitable distance value of each section of the transmission line in the target area, the appearance variation coefficient compensation adjustment parameter value c of the UAV in each section of the transmission line in the target area is mapped. x ; Obtain the initial grayscale value b of each section of the transmission line in the target area from the local database x , calculate the appearance variation coefficient of each wire in each section of the transmission line in the target area Where e is a natural constant; The short-circuit hazard prediction unit is used to obtain the rainfall status of each section of the transmission line in the target area, and perform short-circuit threat analysis on each wire to be analyzed in each section of the transmission line in the target area according to the rainfall status. In combination with the environmental information of the area where each section of the transmission line in the target area is located, the short-circuit threat wires in each section of the transmission line in the target area are screened; The short circuit warning module is used to send the abnormal appearance of each wire and each short circuit threat wire in each section of the transmission line in the target area to the person in charge of transmission line maintenance.

2. A short circuit fault warning system for a line according to claim 1, characterized in that: The short-circuit hazard prediction unit includes: a transmission line environmental information acquisition module, a rainfall short-circuit threat analysis module, a non-rainfall short-circuit threat analysis module, and an abnormal transmission line analysis module; The transmission line environmental information acquisition module is used to obtain the rainfall status of the area where each section of the transmission line in the target area is located during the future target monitoring period from the meteorological management platform, so as to screen the sections of the transmission line in the target area that have experienced rainfall and the sections of the transmission line that have not experienced rainfall; The non-rainfall short-circuit threat analysis module is used to obtain the wind speed, wind direction, temperature, and humidity values of the area where each section of the non-rainfall transmission line in the target area is located from the meteorological management platform, analyze the short-circuit threat coefficient of each to-be-analyzed wire in each section of the non-rainfall transmission line in the target area, and screen each short-circuit-threatening wire in each section of the non-rainfall transmission line in the target area; The rainfall short circuit threat analysis module is used to obtain the rainfall, wind speed and wind direction of the area where each section of the rainfall power transmission line in the target area is located from the meteorological management platform, analyze the short circuit threat coefficient of each to-be-analyzed wire in each section of the rainfall power transmission line in the target area, and screen each short circuit threat wire in each section of the rainfall power transmission line in the target area; The abnormal transmission line analysis module is used to summarize the short-circuit threatened wires in each section of the transmission line in the target area based on the short-circuit threatened wires in each section of the transmission line without rainfall and the short-circuit threatened wires in each section of the transmission line with rainfall.

3. A short circuit fault warning system for a line according to claim 2, characterized in that: The specific analysis method for the short-circuit threat coefficient of each to-be-analyzed power line in each section of the non-rainfall transmission line in the target area is as follows: According to the wind speed and direction of the area where the transmission lines in the target area are located, the wind trip threat coefficient φ of the transmission lines in the target area is analyzed. p , where p represents the number of each section of the transmission line that has not experienced rainfall, p = 1, 2, ..., q, q is a positive integer greater than 2; According to the appearance variation coefficient of each wire in each section of the transmission line in the target area, the appearance variation coefficient A of each wire to be analyzed in each section of the transmission line in the target area without rainfall is extracted. pt , where t represents the number of each wire to be analyzed, t = 1, 2, ..., u, and u is a positive integer greater than 2; The short-circuit threat coefficient adjustment parameter values corresponding to each temperature value interval and each humidity value interval are obtained from the local database. According to the temperature and humidity values of the area where each section of the transmission line without rainfall in the target area is located, the short-circuit threat coefficient adjustment parameter value B of each section of the transmission line without rainfall in the target area is mapped. p ; Analyze the short circuit threat coefficient of each power line to be analyzed in each section of the transmission line in the target area without rainfall 4. A short circuit fault warning system for a line according to claim 3, characterized in that: The specific analysis method for the wind-induced tripping threat coefficient of the power lines in each section of the non-rainfall transmission line in the target area is as follows: Obtain the straight lines formed by the sections of the transmission lines without rainfall in the target area in the direction of the extension of the power lines from the local database. According to the wind direction of the area where the sections of the transmission lines without rainfall in the target area are located, obtain the straight lines formed by the sections of the transmission lines without rainfall in the target area in the wind direction of the area. Calculate the two complementary angles and their degrees between the straight lines formed by the sections of the transmission lines without rainfall in the target area in the direction of the extension of the power lines and in the wind direction of the area. Randomly select one of the angles as the target angle of the sections of the transmission lines without rainfall in the target area, and obtain the degree g of the target angle of the sections of the transmission lines without rainfall in the target area. p ; Obtain the appropriate vertical wind speed value f for each section of the transmission line in the target area without rainfall from the local database p , based on the wind speed value d in the area where each section of the transmission line without rainfall belongs to the target area p , calculate the wind hazard coefficient of each section of the transmission line in the target area without rainfall Calculate the wire shaking accident coefficient ε for each section of the transmission line in the target area without rainfall p ; Analyze the wind-induced tripping threat coefficient φ of each section of the transmission line in the target area without rainfall p =δ p +ε p .

5. A short circuit fault warning system for a line according to claim 4, characterized in that: The specific calculation method for the wire shaking accident coefficient of each section of the transmission line in the target area without rainfall is as follows: Obtain the number of power lines h in each section of the target area where no rainfall occurs from the local database. p , the actual spacing k between wires p , the length l of each wire to be analyzed pt and the length r between the poles p ; According to the voltage values of each section of the transmission line in the target area, the voltage values of each section of the transmission line in the target area without rainfall are extracted; Obtain the lower limit of the allowable wire spacing under each voltage value range from the local database, and map it to obtain the lower limit of the allowable wire spacing s for each section of the transmission line in the target area without rainfall. p ; Calculate the wire shaking accident coefficient for each section of the transmission line in the target area without rainfall 6. A short circuit fault warning system for a line according to claim 2, characterized in that: The specific analysis method for the short circuit threat coefficient of each to-be-analyzed wire in each section of the rainfall transmission line in the target area is as follows: According to the wind speed and direction of the area where each section of the target area's rainfall transmission line is located, and according to the method of analyzing the wind-induced tripping threat coefficient of the power lines in each section of the target area's non-rainfall transmission line, the wind-induced tripping threat coefficient D of the power lines in each section of the target area's rainfall transmission line is analyzed. N , where N represents the number of each section of the rainfall transmission line, N = 1, 2, ..., M, and M is a positive integer greater than 2; According to the appearance variation coefficient of each wire in each section of the transmission line in the target area, the appearance variation coefficient C of each wire to be analyzed in each section of the rainfall transmission line in the target area is extracted. NT , where T represents the number of each power line to be analyzed in the rainfall transmission line, T = 1, 2, ..., W, W is a positive integer greater than 2; The short-circuit threat coefficient adjustment parameter value corresponding to each rainfall interval is obtained from the local database. According to the rainfall in the area where each section of the rainfall transmission line belongs to the target area, the short-circuit threat coefficient adjustment parameter value E of each section of the rainfall transmission line in the target area is mapped. N ; Analyze the short circuit threat coefficient λ of each power line to be analyzed in each section of the rainfall transmission line in the target area NT =C NT +D N +E N .

7. A short circuit fault warning system for a line according to claim 6, characterized in that: The specific screening method for screening short-circuit-threatening wires in each section of the rainfall transmission line in the target area is as follows: Obtain the upper limit of allowable rainfall corresponding to each appearance variation coefficient interval from the local database, and map the upper limit of allowable rainfall for each power line to be analyzed in each section of the rainfall transmission line in the target area based on the appearance variation coefficient of each power line to be analyzed; If the rainfall of a certain power line to be analyzed in a certain section of the rainfall transmission line in the target area exceeds the upper limit of the allowable rainfall, the power line to be analyzed will be marked as a short-circuit threat wire; Obtain the short-circuit threat coefficient threshold of the rainfall-induced power transmission line from the local database. If the short-circuit threat coefficient of a certain power line to be analyzed in a certain rainfall-induced power transmission line in the target area is greater than the short-circuit threat coefficient threshold, then mark the power line to be analyzed as a short-circuit threat power line. In summary, the short-circuit threat wires of each section of rainfall transmission line in the target area are summarized.

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