A method, device and storage medium for monitoring wind speed of a transmission line

Abstract

The present invention discloses a method, device and storage medium for monitoring wind speed of a transmission line, wherein the method comprises: obtaining a digital elevation model of a transmission line to be monitored in a target area, and searching for several meteorological stations closest to the transmission line to be monitored according to the longitude and latitude in the digital elevation model; selecting a transmission tower in the transmission line to be monitored as a reference transmission tower, selecting a reference meteorological station from several meteorological stations, and the deviation angle between the wind direction monitored by the reference meteorological station and the wind direction monitored by an anemometer is within a preset range; calculating the theoretical wind speed of all transmission towers based on the digital elevation model; calculating the wind speed correction coefficient according to the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, and calculating the actual wind speed of the remaining transmission towers according to the wind speed correction coefficient and the theoretical wind speed of the remaining transmission towers. The embodiment of the present invention can not only effectively improve the accuracy of wind speed monitoring of transmission lines, but also effectively reduce costs.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission line environment monitoring, and in particular to a method, device and storage medium for monitoring wind speed of a power transmission line. Background Art

[0002] In coastal areas, typhoon disasters are the main cause of damage to transmission line towers, causing huge losses to the power grid and affecting normal electricity consumption in society. When a typhoon comes, by obtaining the actual wind speed of the tower, it is possible to effectively guide the operation and maintenance of the power grid and take corresponding measures in time to reduce the losses caused by wind speeds exceeding the tower's tolerance. Existing transmission line wind speed monitoring methods usually use the wind speed and direction measured by the meteorological station near the line as the wind speed and direction of each tower in the line, but the login path and wind speed errors of the weather forecast are large, resulting in large errors in the wind speed monitoring of the transmission line. Summary of the invention

[0003] The present invention provides a transmission line wind speed monitoring method, device and storage medium to solve the technical problem that the existing transmission line wind speed monitoring method uses the wind speed and direction measured by a meteorological station near the line as the wind speed and direction of each tower in the line, resulting in large errors in the transmission line wind speed monitoring.

[0004] An embodiment of the present invention provides a method for monitoring wind speed of a power transmission line, comprising:

[0005] Obtaining a digital elevation model of the power transmission line to be monitored in the target area, and searching for several meteorological stations closest to the power transmission line to be monitored according to the longitude and latitude in the digital elevation model;

[0006] Selecting a transmission tower as a reference transmission tower in the transmission line to be monitored, and selecting a reference meteorological station from a number of meteorological stations by comparing the wind direction monitored by the anemometer installed on the reference transmission tower with the wind direction monitored by all meteorological stations, wherein the deviation angle between the wind direction monitored by the reference meteorological station and the wind direction monitored by the anemometer is within a preset range;

[0007] Calculating the theoretical wind speed of all transmission towers based on the digital elevation model;

[0008] A wind speed correction coefficient is calculated based on the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, and the actual wind speeds of the remaining transmission towers are calculated based on the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers.

[0009] Furthermore, the calculating of the theoretical wind speed of all transmission towers based on the digital elevation model includes:

[0010] Acquire the average vegetation height and the maximum elevation of the transmission line to be monitored in the target area according to the digital elevation model;

[0011] Connecting the reference transmission tower and the reference meteorological station, intercepting a vertical section where the reference transmission tower and the reference meteorological station are located in the digital elevation model, and calculating the horizontal distance and elevation between all transmission towers and the reference meteorological station based on the section;

[0012] The theoretical wind speed of all transmission towers is calculated based on the average vegetation height, the maximum elevation, the horizontal distance, the elevation and the actual wind speed of the reference meteorological station.

[0013] Further, selecting a transmission tower in the transmission line to be monitored as a reference transmission tower includes:

[0014] The midpoint of the transmission line to be monitored is obtained, and the transmission tower closest to the midpoint is selected as a reference transmission tower.

[0015] Furthermore, the wind speed correction coefficient is calculated based on the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, including:

[0016] The ratio of the actual wind speed of the reference transmission tower to the theoretical wind speed of the reference transmission tower is used as a wind speed correction system.

[0017] Furthermore, the actual wind speeds of the remaining transmission towers are calculated based on the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers, including:

[0018] The product of the correction coefficient and the actual wind speed of the remaining transmission towers is used as the actual wind speed of the remaining transmission towers.

[0019] An embodiment of the present invention provides a transmission line wind speed monitoring device, comprising:

[0020] A weather station search module is used to obtain a digital elevation model of the power transmission line to be monitored in the target area, and to search for several weather stations closest to the power transmission line to be monitored according to the longitude and latitude in the digital elevation model;

[0021] A reference meteorological station selection module is used to select a transmission tower in the transmission line to be monitored as a reference transmission tower, and select a reference meteorological station from a number of meteorological stations by comparing the wind direction monitored by the anemometer installed on the reference transmission tower with the wind direction monitored by all meteorological stations, and the deviation angle between the wind direction monitored by the reference meteorological station and the wind direction monitored by the anemometer is within a preset range;

[0022] A theoretical wind speed calculation module, used to calculate the theoretical wind speed of all transmission towers based on the digital elevation model;

[0023] The actual wind speed calculation module is used to calculate the wind speed correction coefficient according to the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, and to calculate the actual wind speeds of the remaining transmission towers according to the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers.

[0024] Furthermore, the theoretical wind speed calculation module is specifically used for:

[0025] Acquire the average vegetation height and the maximum elevation of the transmission line to be monitored in the target area according to the digital elevation model;

[0026] Connecting the reference transmission tower and the reference meteorological station, intercepting a vertical section where the reference transmission tower and the reference meteorological station are located in the digital elevation model, and calculating the horizontal distance and elevation between all transmission towers and the reference meteorological station based on the section;

[0027] The theoretical wind speed of all transmission towers is calculated based on the average vegetation height, the maximum elevation, the horizontal distance, the elevation and the actual wind speed of the reference meteorological station.

[0028] Furthermore, the weather station search module is used to:

[0029] The midpoint of the transmission line to be monitored is obtained, and the transmission tower closest to the midpoint is selected as a reference transmission tower.

[0030] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of wind speed monitoring of a power transmission line as described above are implemented.

[0031] The embodiment of the present invention makes full use of the existing meteorological station. It only needs to install an anemometer on one transmission tower to calculate the actual wind speed of all transmission towers, thereby realizing the monitoring of the wind speed of the transmission line. There is no need to use the wind speed and direction measured by the meteorological station as the wind speed and direction of each tower in the line. It can not only effectively improve the accuracy of wind speed monitoring, but also effectively reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of a method for monitoring wind speed of a power transmission line provided by an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of a power transmission line provided by an embodiment of the present invention;

[0034] Figure 3It is a schematic diagram of a vertical section of the area where the reference weather station and the reference transmission tower are located provided by an embodiment of the present invention;

[0035] Figure 4 It is a structural schematic diagram of a transmission line wind speed monitoring device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] See also Figure 1 An embodiment of the present invention provides a method for monitoring wind speed of a transmission line, comprising:

[0040] S1. Obtain a digital elevation model of the transmission line to be monitored in the target area, and search for several meteorological stations closest to the transmission line to be monitored according to the longitude and latitude in the digital elevation model;

[0041] It is understandable that meteorological stations include national meteorological stations and automatic meteorological stations. National meteorological stations generally refer to national basic meteorological stations. National basic meteorological stations are the main stations of the national weather and climate station network. They are equipped with type II integrated wired telemetry equipment, require day and night manned shifts, obtain data to maintain long-term continuity, and compile monthly (annual) reports. Such stations are required to remain unchanged for a long time, and the distance between the two stations is generally about 150km. They also undertake weather reports, important weather reports and aviation hazard reports. Ground meteorological observation is one of the basic tasks of each ground meteorological observation station. The basic tasks of ground meteorological observation are observation, recording, processing and compiling meteorological reports. Ground meteorological observation stations are divided into national benchmark climate stations, national basic meteorological stations and national general meteorological stations according to the observation tasks and functions they undertake. National benchmark climate stations conduct 24 scheduled observations every day and are on duty day and night; national basic meteorological stations conduct 4 scheduled observations at 02:00, 08:00, 14:00 and 20:00 and 4 supplementary observations at 05:00, 11:00, 17:00 and 23:00 every day, and are on duty day and night; national general meteorological stations are set up according to the administrative divisions of provinces (autonomous regions and municipalities). Automatic weather stations refer to weather stations that can automatically detect multiple elements according to needs in a certain area, automatically generate messages without human intervention, and transmit detection data to the central station at regular intervals. They are an important means to fill the gaps in meteorological detection data in spatial areas. They are composed of meteorological sensors, microcomputer meteorological data acquisition instruments, power supply systems, radiation-proof ventilation hoods, all-weather protection boxes, meteorological observation brackets, communication modules and other parts. It can be used for all-weather on-site monitoring of more than a dozen meteorological elements, including wind speed, wind direction, rainfall, air temperature, air humidity, light intensity, soil temperature, soil humidity, evaporation, atmospheric pressure, etc. It can be connected to a computer through a professional data acquisition communication line to transfer data to a meteorological computer database for statistical analysis and processing.

[0042] In the embodiment of the present invention, the digital elevation model data of the area where the transmission line to be monitored is located can be obtained based on the geographic information data disclosed on the Internet or measured. The digital elevation model (DEM) is the most basic part of the DTM. It is a discrete mathematical expression of the topography of the earth's surface. The embodiment of the present invention can obtain the longitude and latitude of the transmission line to be monitored and the corresponding elevation, as well as the average vegetation height data h of the area where the transmission line to be monitored is located, and the maximum elevation h according to the digital elevation model. max .

[0043] In the embodiment of the present invention, several meteorological stations closest to the transmission line to be monitored are searched according to the longitude and latitude in the digital elevation model. That is, the longitude and latitude of the transmission line to be monitored are used as a reference, and nearby meteorological stations are searched first according to the shortest distance. For example, a preset number of meteorological stations are searched according to the shortest distance search principle. For example, meteorological stations within a preset distance range are searched according to the shortest distance search principle.

[0044] S2. Select a transmission tower as a reference transmission tower in the transmission line to be monitored, and select a reference meteorological station from a number of meteorological stations by comparing the wind direction monitored by the anemometer installed on the reference transmission tower with the wind direction monitored by all meteorological stations. The deviation angle between the wind direction monitored by the reference meteorological station and the wind direction monitored by the anemometer is within a preset range.

[0045] In an embodiment of the present invention, a transmission tower is selected in the transmission line to be monitored as a reference transmission tower, and an installation point for installing an anemometer is set on the reference transmission tower, wherein the reference transmission tower can be arbitrarily selected from all transmission towers in the transmission line to be monitored.

[0046] Optionally, an embodiment of the present invention selects a transmission tower in the middle section of the transmission line to be monitored as a reference transmission tower. For example, in a transmission line with a length of 100KM, after determining the direction of the transmission line, a transmission tower is selected in the middle section at 30KM-70KM as a reference transmission tower; for example, in a transmission line with a length of 100KM, a nearest transmission tower is selected at a transmission line length of 50KM as a reference transmission tower. The reference transmission towers are selected at both ends of the transmission line, resulting in a gradual increase in the error at the other end, thereby effectively improving the accuracy and reliability of monitoring.

[0047] See also Figure 2 The anemometer and each meteorological station in the embodiment of the present invention monitor the wind direction data and wind speed data according to the preset frequency. When an extreme strong wind such as a typhoon occurs, the wind direction monitored by the anemometer installed on the reference transmission tower is compared with the wind direction monitored by the other meteorological stations, and the meteorological station whose angle deviation between the wind direction and the wind direction monitored by the anemometer is within the preset range is selected as the reference meteorological station. The angle deviation of the preset range can be set according to actual needs. For example, the angle deviation of the preset range is |θ n -α m |<5°, that is, the absolute value of the difference is within 5°, then the wind direction is considered to be consistent. When there are fewer meteorological stations around, the error range can be expanded to 15°, θ n is the wind direction monitored by the reference weather station, α m The wind direction is monitored by the reference transmission tower.

[0048] S3, calculate the theoretical wind speed of all transmission towers based on the digital elevation model;

[0049] In the embodiment of the present invention, the reference transmission station and the reference meteorological station are connected, and a vertical section is intercepted in the digital elevation model. According to the section, the horizontal distance and elevation of all transmission towers and the reference meteorological station can be obtained. According to the horizontal distance, elevation, average vegetation height data h, and maximum elevation h max And the wind speed measured by the transmission towers, the theoretical wind speed of all transmission towers is calculated.

[0050] S4. Calculate a wind speed correction coefficient based on the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, and calculate the actual wind speeds of the remaining transmission towers based on the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers.

[0051] In the embodiment of the present invention, the wind speed correction coefficient is used to correct the theoretical wind speed, so that the actual wind speeds of the remaining transmission towers can be accurately obtained.

[0052] The embodiment of the present invention makes full use of the existing meteorological station. It only needs to install an anemometer on one transmission tower to calculate the actual wind speed of all transmission towers, thereby realizing the monitoring of the wind speed of the transmission line. There is no need to use the wind speed and direction measured by the meteorological station as the wind speed and direction of each tower in the line. It can not only effectively improve the accuracy of wind speed monitoring, but also effectively reduce costs.

[0053] In one embodiment, the theoretical wind speed of all transmission towers is calculated based on the digital elevation model, including:

[0054] According to the digital elevation model, the average vegetation height h and the maximum elevation h of the transmission line to be monitored in the target area are obtained. max ;

[0055] Connect the reference transmission tower and the reference meteorological station, intercept the vertical section where the reference transmission tower and the reference meteorological station are located in the digital elevation model, and calculate the horizontal distance and elevation between all transmission towers and the reference meteorological station based on the section;

[0056] See also Figure 3 In a specific implementation, the horizontal distance between the reference transmission tower m and the reference meteorological station n is L m , the elevation is H m , the horizontal distance between the remaining transmission towers i in the line and the reference meteorological station is L i , the elevation is H i .

[0057] The theoretical wind speed of all transmission towers is calculated based on the average vegetation height, maximum elevation, horizontal distance, elevation, and actual wind speed at the benchmark meteorological station.

[0058] In the embodiment of the present invention, the theoretical wind speed of the reference transmission tower m is calculated according to formula (1):

[0059]

[0060] Among them, v m is the theoretical wind speed of the base transmission tower m, v n Wind direction monitored by anemometer, H m is the elevation of the horizontal distance between the reference transmission tower m and the reference meteorological station n, L m is the horizontal distance between the reference transmission tower m and the reference meteorological station n, h is the average vegetation height of the transmission line to be monitored in the target area, and h max It is the maximum elevation of the average vegetation height in the target area of ​​the transmission line to be monitored.

[0061] Based on the same technical concept, the theoretical wind speed V of the remaining transmission tower i can be calculated according to formula (1): i .

[0062] In one embodiment, selecting a transmission tower as a reference transmission tower in a transmission line to be monitored includes:

[0063] Get the midpoint of the transmission line to be monitored and select the transmission tower closest to the midpoint as the reference transmission tower.

[0064] In this embodiment, the midpoint may be the midpoint of the length of the power transmission line to be monitored, or may be the midpoint of the line connecting the starting point and the end point of the power transmission line to be monitored.

[0065] In one embodiment, the wind speed correction coefficient is calculated based on the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, including:

[0066] The ratio of the actual wind speed of the reference transmission tower to the theoretical wind speed of the reference transmission tower is used as the wind speed correction system.

[0067] Specifically, the calculation formula of the wind speed correction coefficient is:

[0068] μ=u m / v m (2)

[0069] Where μ is the wind speed correction coefficient, u m is the actual wind speed of the reference transmission tower, v m is the theoretical wind speed of the base transmission tower.

[0070] In one embodiment, the actual wind speeds of the remaining transmission towers are calculated based on the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers, including:

[0071] The product of the correction coefficient and the actual wind speed of the remaining transmission towers is taken as the actual wind speed of the remaining transmission towers.

[0072] After obtaining the wind speed correction coefficient μ, the actual wind speed of all transmission towers i is calculated according to formula (3) in combination with the theoretical wind speed of transmission tower i:

[0073] V i =V i ·μ (3)

[0074] Among them, V i is the actual wind speed of the ith transmission tower, V' i is the theoretical wind speed of the ith transmission tower.

[0075] The implementation of the embodiments of the present invention has the following beneficial effects:

[0076] The embodiment of the present invention makes full use of the existing meteorological station. It only needs to install an anemometer on one transmission tower to calculate the actual wind speed of all transmission towers, thereby realizing the monitoring of the wind speed of the transmission line. There is no need to use the wind speed and direction measured by the meteorological station as the wind speed and direction of each tower in the line. It can not only effectively improve the accuracy of wind speed monitoring, but also effectively reduce costs.

[0077] Furthermore, an embodiment of the present invention calculates the theoretical wind speed of a reference transmission tower based on a digital elevation model, and calculates a wind speed correction coefficient through the actual wind speed of the transmission tower in which an anemometer is installed. The wind speed correction coefficient is used to correct the theoretical wind speeds of other transmission towers to obtain the actual wind speed. The wind speed correction coefficient is applicable to actual complex terrain, thereby making wind speed monitoring of transmission towers of transmission lines more reliable and accurate.

[0078] See also Figure 4 Based on the same inventive concept as above, an embodiment of the present invention provides a transmission line wind speed monitoring device, comprising:

[0079] The weather station search module 10 is used to obtain the digital elevation model of the transmission line to be monitored in the target area, and search for several weather stations closest to the transmission line to be monitored according to the longitude and latitude in the digital elevation model;

[0080] The reference weather station selection module 20 is used to select a transmission tower as a reference transmission tower in the transmission line to be monitored, and select a reference weather station from a number of weather stations by comparing the wind direction monitored by the anemometer installed on the reference transmission tower with the wind direction monitored by all weather stations, and the deviation angle between the wind direction monitored by the reference weather station and the wind direction monitored by the anemometer is within a preset range;

[0081] Theoretical wind speed calculation module 30, used to calculate the theoretical wind speed of all transmission towers based on the digital elevation model;

[0082] The actual wind speed calculation module 40 is used to calculate the wind speed correction coefficient according to the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, and calculate the actual wind speeds of the remaining transmission towers according to the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers.

[0083] In one embodiment, the theoretical wind speed calculation module 30 is specifically used for:

[0084] Obtain the average vegetation height and maximum elevation of the transmission line to be monitored in the target area according to the digital elevation model;

[0085] Connect the reference transmission tower and the reference meteorological station, intercept the vertical section where the reference transmission tower and the reference meteorological station are located in the digital elevation model, and calculate the horizontal distance and elevation between all transmission towers and the reference meteorological station based on the section;

[0086] The theoretical wind speed of all transmission towers is calculated based on the average vegetation height, maximum elevation, horizontal distance, elevation, and actual wind speed at the benchmark meteorological station.

[0087] In one embodiment, the weather station search module 10 is used to:

[0088] Get the midpoint of the transmission line to be monitored and select the transmission tower closest to the midpoint as the reference transmission tower.

[0089] In one implementation, the actual wind speed calculation module 40 is used to:

[0090] The ratio of the actual wind speed of the reference transmission tower to the theoretical wind speed of the reference transmission tower is used as the wind speed correction system.

[0091] In one embodiment, the actual wind speed calculation module 40 is further used to:

[0092] The product of the correction coefficient and the actual wind speed of the remaining transmission towers is taken as the actual wind speed of the remaining transmission towers.

[0093] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of wind speed monitoring of a power transmission line as described above are implemented.

[0094] The above are preferred embodiments of the present invention. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for monitoring wind speed of a transmission line, characterized in that: include: Obtaining a digital elevation model of the power transmission line to be monitored in the target area, and searching for several meteorological stations closest to the power transmission line to be monitored according to the longitude and latitude in the digital elevation model; Selecting a transmission tower as a reference transmission tower in the transmission line to be monitored, and selecting a reference meteorological station from a number of meteorological stations by comparing the wind direction monitored by the anemometer installed on the reference transmission tower with the wind direction monitored by all meteorological stations, wherein the deviation angle between the wind direction monitored by the reference meteorological station and the wind direction monitored by the anemometer is within a preset range; The theoretical wind speed of all transmission towers is calculated based on the digital elevation model, including: obtaining the average vegetation height and the maximum elevation of the transmission line to be monitored in the target area according to the digital elevation model; connecting the reference transmission tower and the reference meteorological station, intercepting the vertical section of the reference transmission tower and the reference meteorological station in the digital elevation model, and calculating the horizontal distance and elevation between all transmission towers and the reference meteorological station based on the section; according to the average vegetation height, the maximum elevation, the horizontal distance, the elevation and the actual wind speed of the reference meteorological station, the theoretical wind speed of all transmission towers is calculated, wherein the calculation formula of the theoretical wind speed of the reference transmission tower m is as follows: Among them, v m is the theoretical wind speed of the base transmission tower m, v n Wind direction monitored by anemometer, H m is the elevation of the horizontal distance between the reference transmission tower m and the reference meteorological station n, L m is the horizontal distance between the reference transmission tower m and the reference meteorological station n, h is the average vegetation height of the transmission line to be monitored in the target area, and h max is the maximum elevation of the average vegetation height of the transmission line to be monitored in the target area; The wind speed correction coefficient is calculated according to the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, and the actual wind speeds of the remaining transmission towers are calculated according to the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers, wherein the calculation formula of the wind speed correction coefficient is: μ=u m / v m (2) Where μ is the wind speed correction coefficient, u m is the actual wind speed of the reference transmission tower, v m is the theoretical wind speed of the reference transmission tower; The calculation formula for the actual wind speed of all transmission towers i is: V i =V i ,·μ (3) Among them, V i is the actual wind speed of the ith transmission tower, V' i is the theoretical wind speed of the i-th transmission tower.

2. The method for monitoring wind speed of a power transmission line according to claim 1, characterized in that: The step of selecting a transmission tower in the transmission line to be monitored as a reference transmission tower comprises: The midpoint of the transmission line to be monitored is obtained, and the transmission tower closest to the midpoint is selected as a reference transmission tower.

3. A transmission line wind speed monitoring device, characterized in that: include: A weather station search module is used to obtain a digital elevation model of the power transmission line to be monitored in the target area, and to search for several weather stations closest to the power transmission line to be monitored according to the longitude and latitude in the digital elevation model; A reference meteorological station selection module is used to select a transmission tower in the transmission line to be monitored as a reference transmission tower, and select a reference meteorological station from a number of meteorological stations by comparing the wind direction monitored by the anemometer installed on the reference transmission tower with the wind direction monitored by all meteorological stations, and the deviation angle between the wind direction monitored by the reference meteorological station and the wind direction monitored by the anemometer is within a preset range; A theoretical wind speed calculation module, used to calculate the theoretical wind speed of all transmission towers based on the digital elevation model; Specifically used for: obtaining the average vegetation height and the maximum elevation of the transmission line to be monitored in the target area according to the digital elevation model; connecting the reference transmission tower and the reference meteorological station, intercepting the vertical section where the reference transmission tower and the reference meteorological station are located in the digital elevation model, and calculating the horizontal distance and elevation between all transmission towers and the reference meteorological station based on the section; The theoretical wind speed of all transmission towers is calculated according to the average vegetation height, the maximum elevation, the horizontal distance, the elevation and the actual wind speed of the reference meteorological station, wherein the calculation formula of the theoretical wind speed of the reference transmission tower m is as follows: Among them, v m is the theoretical wind speed of the base transmission tower m, v n Wind direction monitored by anemometer, H m is the elevation of the horizontal distance between the reference transmission tower m and the reference meteorological station n, L m is the horizontal distance between the reference transmission tower m and the reference meteorological station n, h is the average vegetation height of the transmission line to be monitored in the target area, and h max is the maximum elevation of the average vegetation height of the transmission line to be monitored in the target area; The actual wind speed calculation module is used to calculate the wind speed correction coefficient according to the theoretical wind speed of the reference transmission tower and the actual wind speed of the reference transmission tower, and calculate the actual wind speed of the remaining transmission towers according to the wind speed correction coefficient and the theoretical wind speeds of the remaining transmission towers; wherein the calculation formula of the wind speed correction coefficient is: μ=u m / v m (2) Where μ is the wind speed correction coefficient, u m is the actual wind speed of the reference transmission tower, v m is the theoretical wind speed of the reference transmission tower; The calculation formula for the actual wind speed of all transmission towers i is: V i =V i ,·μ (3) Among them, V i is the actual wind speed of the ith transmission tower, V' i is the theoretical wind speed of the i-th transmission tower.

4. The transmission line wind speed monitoring device according to claim 3, characterized in that: The weather station search module is used to: The midpoint of the transmission line to be monitored is obtained, and the transmission tower closest to the midpoint is selected as a reference transmission tower.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for monitoring wind speed of a power transmission line according to any one of claims 1 to 2 is implemented.

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