Method and equipment for identifying special corridor of power transmission line

Abstract

The invention relates to the field of power transmission line risk management and control, in particular to a method and equipment for identifying a special corridor of a power transmission line. The method comprises the following steps: loading information of all power transmission lines in a to-be-identified area, and constructing an index database for the line information; and then, constructing a line map grid, and mapping all the ID information of the power transmission line to the line grid at the corresponding position. Thirdly, constructing extra-high-voltage line map grids, and mapping all the ID information of the extra-high-voltage transmission lines to the extra-high-voltage line map grids at the corresponding positions; and finally, constructing a detection frame, and respectively detecting the areas meeting the special corridor conditions in the line map grid and the extra-high voltage line map grid, thereby achieving the effect of automatically and accurately identifying the special corridor area in a certain area. Compared with a traditional artificial identification method, the method can effectively improve the identification accuracy, and better carries out risk management and control on a special corridor.

Description

Technical Field

[0001] This invention relates to the field of transmission line risk management, and in particular to a method and equipment for identifying special corridors of transmission lines. Background Technology

[0002] Special transmission line corridors refer to areas no wider than 600 meters that contain at least two ultra-high voltage direct current (UHVDC) lines or at least five 500 kV or higher transmission lines. With the construction of transmission lines in my country, numerous special corridors have been formed. These corridors cross complex environments, and natural disasters such as wildfires can lead to successive power outages within a short period. Furthermore, multiple lines may cross these corridors simultaneously; severe weather, continuous heavy equipment loads, and other factors can cause multiple lines to fail sequentially or simultaneously in these areas, leading to system instability and widespread power outages. Therefore, the prevention and control management of special corridors has become a crucial task for power grid companies.

[0003] Identifying special corridors is a prerequisite for effective prevention and control management of such corridors. However, current identification methods primarily rely on manual methods, which suffer from low efficiency and inconsistent accuracy. Therefore, a method for automatically identifying special corridors along power transmission lines is needed. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of low efficiency and unstable accuracy in the identification of special corridors in the prior art, and to provide a method and device for identifying special corridors of power transmission lines.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A method for identifying special corridors of power transmission lines includes the following steps: S1: Obtain the transmission line files for the area to be identified, extract the line information of each transmission line, and store it in the line information index library; the line information includes line name, line ID, voltage level, and tower coordinates; S2: Construct a transmission line map grid based on the line information of each transmission line in the line information index library to record the spatial distribution of all transmission lines; S3: Obtain transmission lines with voltage levels ≥800KV from the line information index library and construct an UHV line map grid to record the spatial distribution of all UHV lines; S4: Traverse the power transmission line map grid and the ultra-high voltage line map grid, search for areas that meet preset conditions, and output them as special corridors.

[0006] As a preferred embodiment of the present invention, step S2 includes the following steps: S21: Obtain the maximum and minimum values ​​of the tower coordinates from the line information index database, determine the range of the transmission line map, and evenly divide the transmission line map into several grid areas to generate a transmission line map grid; wherein, the size of each grid area is 1m×1m, and the initial parameter of each grid area is 0; S22: Read the tower coordinates of a transmission line from the line information index database, calculate the line equation between each adjacent tower in sequence, and update the grid parameters according to the line equation; S23: Repeat S22 until all transmission lines have been calculated and output the current transmission line map grid.

[0007] As a preferred embodiment of the present invention, the expression for the line equation between adjacent i-th towers and (i+1)-th towers in S22 is as follows: , Among them, (x i ,y i (x) represents the coordinates of the i-th tower. i+1 ,y i+1 () represents the coordinates of the (i+1)th tower; The update of the grid parameters between the i-th and i+1-th towers includes the following steps: In the grid of the transmission line map [x i ,x i+1 ] and [y i ,y i+1 Within the interval, obtain the line grid where the distance between the line equation and the i-th and (i+1)-th towers is less than 1 meter; Set the obtained line grid's grid parameter values ​​as the line ID.

[0008] As a preferred embodiment of the present invention, step S3 includes the following steps: S31: Obtain all transmission lines with voltage levels ≥800KV from the line information index database; traverse the maximum and minimum values ​​of the corresponding tower coordinates to determine the range of the UHV line map; divide the UHV line map evenly into several grid areas to generate an UHV line map grid; wherein, the size of each grid area is 1m×1m, and the initial parameter of each grid area is 0; S32: Read the tower coordinates of a transmission line with a voltage level ≥800KV from the line information index database, calculate the line equation between each adjacent tower in sequence, and update the grid parameters according to the line equation; S33: Repeatedly execute S32 until all transmission lines with voltage levels ≥800KV have completed the calculation, and output the current UHV line map grid.

[0009] As a preferred embodiment of the present invention, the expression for the line equation between adjacent m-th towers and (m+1)-th towers in S32 is as follows: , Among them, (x m ,y m (x) represents the coordinates of the m-th tower. m+1 ,y m+1 () represents the coordinates of the (m+1)th tower; The update of the mesh parameters between the m-th and m+1-th towers includes the following steps: In the grid of the transmission line map [x m ,x m+1 ] and [y m ,y m+1 Within the interval, obtain the line grid where the distance between the line equation and the m-th and m+1-th towers is less than 1 meter; Set the obtained line grid's grid parameter values ​​as the line ID.

[0010] As a preferred embodiment of the present invention, step S4 includes the following steps: S41: Set the size of the detection frame; S42: Search the transmission line map grid and the ultra-high voltage line map grid respectively by map traversal; during the search, count the number of line IDs in the detection box, and when the number of line IDs in the detection box is greater than or equal to the set line number threshold, mark the map grid area in the current detection box as the detection area; S43: Calculate the plane angle of all lines in the detection area. If the maximum plane angle is less than the plane angle threshold, the corresponding area is determined to be a special corridor area. S44: After all areas to be detected have been calculated, output all special corridor areas as special corridor recognition results.

[0011] As a preferred embodiment of the present invention, in S42, the threshold value for the number of lines in the transmission line map grid is 5, and the threshold value for the number of lines in the ultra-high voltage line map grid is 2.

[0012] In a preferred embodiment of the present invention, in step S43, the plane angle threshold is 60°, and the formula for calculating the plane angle is: , in, θ m This represents the maximum planar angle between all lines within the area to be detected, and max{} indicates taking the maximum value. θ I,JThis represents the angle between the I-th line and the J-th line within the grid area, (x) I ,y I ) and (x I+1 ,y I+1 Let (x) be the tower coordinates of the I-th line, and (x) be the tower coordinates of the I-th line J ,y J ) and (x J+1 ,y J+1 ) represents the tower coordinates of the Jth line.

[0013] As a preferred embodiment of the present invention, the size of the detection frame in S41 is 600m × 600m.

[0014] A special corridor identification device for transmission lines includes at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform any of the methods described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention proposes a method for identifying special corridors in power transmission lines. The method first loads information on all power transmission lines within the area to be identified and constructs an index database for this information. Then, it constructs a line map grid and maps all transmission line IDs to the corresponding grid locations. Next, it constructs an ultra-high voltage (UHV) line map grid and maps all UHV transmission line IDs to the corresponding grid locations. Finally, it constructs a detection box and detects areas within both the line map grid and the UHV line map grid that meet the special corridor criteria, thereby automatically and accurately identifying special corridor areas within a given region. Compared to traditional manual identification methods, this invention effectively improves the accuracy of identification and better manages the risks associated with special corridors. Attached Figure Description

[0016] Figure 1 This is a flowchart illustrating a method for identifying special corridors of power transmission lines according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram illustrating the principle of special corridor area identification in a special corridor identification method for power transmission lines as described in Embodiment 3 of the present invention; Figure 3 This is a schematic diagram of the structure of a special corridor identification device for a power transmission line, which utilizes the special corridor identification method for power transmission lines described in the foregoing embodiments, as described in Embodiment 4 of the present invention. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0018] Example 1 like Figure 1 As shown, a method for identifying special corridors of power transmission lines includes the following steps: S1: Obtain the transmission line files of the area to be identified, extract the line information of each transmission line, and store it in the line information index library; the line information includes line name, line ID, voltage level, and tower coordinates.

[0019] S2: Construct a transmission line map grid based on the line information of each transmission line in the line information index library to record the spatial distribution of all transmission lines.

[0020] S3: Obtain transmission lines with voltage levels ≥800KV from the line information index library, and construct an UHV line map grid to record the spatial distribution of all UHV lines.

[0021] S4: Traverse the power transmission line map grid and the ultra-high voltage line map grid, search for areas that meet preset conditions, and output them as special corridors.

[0022] Example 2 This embodiment is a specific implementation of the method for identifying special corridors of transmission lines described in Embodiment 1, including the following steps: S1: Line Information Loading: Obtain the transmission line files of the area to be identified, extract the line information of each transmission line, and store it in the line information index library; the line information includes line name, line ID, voltage level, and tower coordinates.

[0023] Furthermore, in this embodiment, the transmission line file is a shapefile, and the process includes the following steps: S11: Load line shapefile: Loads shapefiles that record information about all transmission lines in the area to be identified; S12: Line Information Extraction: Extract the line name, line ID, voltage level, and tower coordinates of each transmission line from the shapefile. S13: Index Construction: Construct the STRtee line information index library, store the line information of each transmission line into the line information index library, and realize the indexing of each line information.

[0024] S2: Transmission line map grid construction: Based on the line information of each transmission line in the line information index library, construct a transmission line map grid to record the spatial distribution of all transmission lines.

[0025] S21: Obtain the maximum and minimum values ​​of the tower coordinates from the line information index library, determine the range of the transmission line map, and evenly divide the transmission line map into several grid areas (in this embodiment, the size of each grid is set to 1m×1m) to generate the transmission line map grid; wherein, the initial parameter of each grid area is 0.

[0026] S22: Read the tower coordinates of a transmission line from the line information index database, calculate the line equation between each adjacent tower in sequence, and update the grid parameters according to the line equation.

[0027] The equation for the line between adjacent towers i and (i+1) is expressed as follows: , Among them, (x i ,y i (x) represents the coordinates of the i-th tower. i+1 ,y i+1 () represents the coordinates of the (i+1)th tower; The update of the grid parameters between the i-th and i+1-th towers includes the following steps: In the grid of the transmission line map [x i ,x i+1 ] and [y i ,y i+1 Within the interval, obtain the line grid where the distance between the line equation and the i-th and (i+1)-th towers is less than 1 meter; Set the obtained line grid's grid parameter values ​​as the line ID.

[0028] S23: Repeat S22 until all transmission lines have been calculated and output the current transmission line map grid.

[0029] S3: UHV line map grid construction: Obtain transmission lines with voltage levels ≥800KV from the line information index library, and construct an UHV line map grid to record the spatial distribution of all UHV lines.

[0030] S31: Obtain all transmission lines with voltage levels ≥800KV from the line information index database; traverse the maximum and minimum values ​​of the corresponding tower coordinates to determine the range of the UHV line map; divide the UHV line map evenly into several grid areas (in this embodiment, the size of each grid is set to 1m×1m) to generate the UHV line map grid; wherein, the initial parameter of each grid area is 0.

[0031] S32: Read the tower coordinates of a transmission line with a voltage level ≥800KV from the line information index database, calculate the line equation between each adjacent tower in sequence, and update the grid parameters according to the line equation.

[0032] The expression for the line equation between adjacent m-th towers and (m+1)-th towers is: , Among them, (x m ,y m (x) represents the coordinates of the m-th tower. m+1 ,y m+1 () represents the coordinates of the (m+1)th tower; The update of the mesh parameters between the m-th and m+1-th towers includes the following steps: In the grid of the transmission line map [x m ,x m+1 ] and [y m ,y m+1 Within the interval, obtain the line grid where the distance between the line equation and the m-th and m+1-th towers is less than 1 meter; Set the obtained line grid's grid parameter values ​​as the line ID.

[0033] S33: Repeatedly execute S32 until all transmission lines with voltage levels ≥800KV have completed the calculation, and output the current UHV line map grid.

[0034] S4: Special Corridor Identification: Traverse the power transmission line map grid and the ultra-high voltage line map grid, search for areas that meet preset conditions, and output them as special corridors.

[0035] S41: Set the size of the detection frame. In this embodiment, the size of the detection frame is 600m × 600m.

[0036] S42: Search the transmission line map grid and the ultra-high voltage line map grid respectively by map traversal; during the search, count the number of line IDs in the detection box, and when the number of line IDs in the detection box is greater than or equal to the set line number threshold, mark the map grid area in the current detection box as the detection area.

[0037] Furthermore, the threshold for the number of lines in the power transmission line map grid is 5, and the threshold for the number of lines in the ultra-high voltage line map grid is 2.

[0038] S43: Calculate the plane angle of all lines in the detection area. If the maximum plane angle is less than the plane angle threshold, the corresponding area is determined to be a special corridor area.

[0039] Furthermore, the plane angle threshold is 60°, and the formula for calculating the plane angle is: , in, θ m This represents the maximum planar angle between all lines within the area to be detected, and max{} indicates taking the maximum value. θ I,J This represents the angle between the I-th line and the J-th line within the grid area, (x) I ,y I ) and (x I+1 ,y I+1 Let (x) be the tower coordinates of the I-th line, and (x) be the tower coordinates of the I-th line J ,y J ) and (x J+1 ,y J+1 ) represents the tower coordinates of the Jth line.

[0040] S44: After all areas to be detected have been calculated, output all special corridor areas as special corridor recognition results.

[0041] Example 3 This embodiment is an experimental example of a special corridor identification method for transmission lines described in Embodiment 2, including the following steps: S1: Line Information Loading: This mainly loads layer features from the shapefile, such as LineID, LineName, Voltagelev, LogicTower, LogicTowe1, LogicTowe2, PointID, etc., to obtain the line name, line ID, voltage level, and tower coordinates for each line. Then, a STRtee line information index is built to index the information for each line.

[0042] S2: Transmission line map grid construction: First, determine the area range of the transmission line map based on the maximum and minimum coordinate values ​​of the transmission line; then divide the transmission line map into several grid areas, each grid area being 1m×1m in size, and set the initial parameters of each grid to 0.

[0043] Then, each transmission line is projected onto the transmission line map, and the grid parameter value of the projection location is changed to the line ID. The final constructed transmission line map is as follows: Figure 2 As shown in the figure, the solid lines represent the projection of the transmission lines, the dotted lines represent the map area, and the dashed lines represent the detection boxes.

[0044] S3: UHV line map grid construction: First, determine the area range of the line map based on the maximum and minimum coordinate values ​​of the UHV line; then divide the line map into several grid areas, each grid area being 1m×1m in size, and set the initial parameters of each grid to 0.

[0045] Then, each UHV line is projected onto the line map, and the grid parameter value of the projection location is changed to the line ID.

[0046] S4: Special Corridor Recognition: First, construct a 600m×600m detection box, such as... Figure 2 The dashed box is then used to identify the lines within the detection box. The number of lines within the detection box is calculated. If the number of lines in the line map grid is 5 or more, the area is marked as a detection area; if the number of lines in the UHV line map grid is 2 or more, the area is marked as a detection area. The detection box is then moved at 1-meter intervals, and the identification process for the detection area is repeated until all grids in the line map grid have been traversed. Finally, for each detection area, the maximum value of the plane angle corresponding to the projected line is calculated using the following formula: , In the formula, θ m This represents the maximum planar angle between all lines within the grid area, and max{} indicates taking the maximum value. θ I,J This represents the angle between the I-th line and the J-th line within the grid area; if θ m A value less than 60° indicates that the grid is a special corridor area.

[0047] Example 4 like Figure 3 As shown, a special corridor identification device for transmission lines includes at least one processor, a memory communicatively connected to the at least one processor, and at least one input / output interface communicatively connected to the at least one processor. The memory stores instructions executable by the at least one processor, which, when executed, enable the at least one processor to perform a special corridor identification method for transmission lines as described in the foregoing embodiments. The input / output interface may include a display, keyboard, mouse, and USB interface for inputting and outputting data.

[0048] Furthermore, the special corridor identification device for power transmission lines can be a desktop computer, mobile phone, tablet computer, wearable power transmission line special corridor identification device, or any other power transmission line special corridor identification device capable of performing deep information identification.

[0049] Furthermore, the processor may include one or more processing cores. The processor connects to various parts within the special corridor identification device for the entire transmission line using various interfaces and lines. It executes various functions and processes data of the special corridor identification device by running or executing instructions, programs, code sets, or instruction sets stored in memory, and by calling data stored in memory. Optionally, the processor may be implemented using at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor may integrate one or a combination of several of the following: Central Processing Unit (CPU), Graphics Processing Unit (GPU), and modem. The CPU primarily handles the operating system, user interface, and applications; the GPU is responsible for rendering and drawing the displayed content; and the modem handles wireless communication. It is understood that the modem may also not be integrated into the processor and may be implemented separately through a communication chip.

[0050] The memory may include random access memory (RAM) or read-only memory (ROM). The memory can be used to store instructions, programs, code, code sets, or instruction sets, such as instructions or code sets used to implement a method for identifying special corridors of transmission lines provided in this application. The memory may include a program storage area and a data storage area. The program storage area may store instructions for implementing an operating system, instructions for implementing at least one function, instructions for implementing the various method embodiments described above, etc. The data storage area may also store data created during the use of the special corridor identification device for transmission lines (such as a mapping table of modulation sequence and depth, image data, spectrogram data, etc.).

[0051] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as mobile storage devices, read-only memory (ROM), magnetic disks, or optical disks.

[0052] When the integrated units of the present invention are implemented as software functional units and sold or used as independent products, they can also be stored in a computer-readable storage medium. The computer-readable storage medium stores program code, which can be called by a processor to execute the methods described in the above method embodiments. Based on this understanding, the technical solution of the embodiments of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium includes a non-transitory computer-readable storage medium. The computer-readable storage medium has storage space for program code that executes any of the method steps described above. This program code can be read from or written to one or more computer program products. The program code can be compressed, for example, in an appropriate form.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for identifying special corridors of power transmission lines, characterized in that, Includes the following steps: S1: Obtain the transmission line files for the area to be identified, extract the line information of each transmission line, and store it in the line information index library; the line information includes line name, line ID, voltage level, and tower coordinates; S2: Construct a transmission line map grid based on the line information of each transmission line in the line information index library to record the spatial distribution of all transmission lines; S3: Obtain transmission lines with voltage levels ≥800KV from the line information index library and construct an UHV line map grid to record the spatial distribution of all UHV lines; S4: Traverse the power transmission line map grid and the ultra-high voltage line map grid, search for areas that meet preset conditions, and output them as special corridors.

2. The method for identifying special corridors of transmission lines according to claim 1, characterized in that, S2 includes the following steps: S21: Obtain the maximum and minimum values ​​of the tower coordinates from the line information index database, determine the range of the transmission line map, and evenly divide the transmission line map into several grid areas to generate a transmission line map grid; wherein, the size of each grid area is 1m×1m, and the initial parameter of each grid area is 0; S22: Read the tower coordinates of a transmission line from the line information index database, calculate the line equation between each adjacent tower in sequence, and update the grid parameters according to the line equation; S23: Repeat S22 until all transmission lines have been calculated and output the current transmission line map grid.

3. The method for identifying special corridors of transmission lines according to claim 2, characterized in that, The expression for the line equation between the i-th tower and the (i+1)-th tower in S22 is as follows: ， Among them, (x i ,y i (x) represents the coordinates of the i-th tower. i+1 ,y i+1 () represents the coordinates of the (i+1)th tower; The update of the grid parameters between the i-th and i+1-th towers includes the following steps: In the grid of the transmission line map [x i ,x i+1 ] and [y i ,y i+1 Within the interval, obtain the line grid where the distance between the line equation and the i-th and (i+1)-th towers is less than 1 meter; Set the obtained line grid's grid parameter values ​​as the line ID.

4. The method for identifying special corridors of transmission lines according to claim 1, characterized in that, S3 includes the following steps: S31: Obtain all transmission lines with voltage levels ≥800KV from the line information index database; traverse the maximum and minimum values ​​of the corresponding tower coordinates to determine the range of the UHV line map; divide the UHV line map evenly into several grid areas to generate an UHV line map grid; wherein, the size of each grid area is 1m×1m, and the initial parameter of each grid area is 0; S32: Read the tower coordinates of a transmission line with a voltage level ≥800KV from the line information index database, calculate the line equation between each adjacent tower in sequence, and update the grid parameters according to the line equation; S33: Repeatedly execute S32 until all transmission lines with voltage levels ≥800KV have completed the calculation, and output the current UHV line map grid.

5. The method for identifying special corridors of transmission lines according to claim 4, characterized in that, The expression for the line equation between the m-th tower and the (m+1)-th tower in S32 is as follows: ， Among them, (x m ,y m (x) represents the coordinates of the m-th tower. m+1 ,y m+1 () represents the coordinates of the (m+1)th tower; The update of the mesh parameters between the m-th and m+1-th towers includes the following steps: In the grid of the transmission line map [x m ,x m+1 ] and [y m ,y m+1 Within the interval, obtain the line grid where the distance between the line equation and the m-th and m+1-th towers is less than 1 meter; Set the obtained line grid's grid parameter values ​​as the line ID.

6. The method for identifying special corridors of transmission lines according to claim 1, characterized in that, S4 includes the following steps: S41: Set the size of the detection frame; S42: Search the transmission line map grid and the ultra-high voltage line map grid respectively by map traversal; during the search, count the number of line IDs in the detection box, and when the number of line IDs in the detection box is greater than or equal to the set line number threshold, mark the map grid area in the current detection box as the detection area; S43: Calculate the plane angle of all lines in the detection area. If the maximum plane angle is less than the plane angle threshold, the corresponding area is determined to be a special corridor area. S44: After all areas to be detected have been calculated, output all special corridor areas as special corridor recognition results.

7. The method for identifying special corridors of transmission lines according to claim 6, characterized in that, In step S42, the threshold value for the number of lines in the transmission line map grid is 5, and the threshold value for the number of lines in the ultra-high voltage line map grid is 2.

8. The method for identifying special corridors of transmission lines according to claim 6, characterized in that, In step S43, the plane angle threshold is 60°, and the formula for calculating the plane angle is: ， in, θ m This represents the maximum planar angle between all lines within the area to be detected, and max{} indicates taking the maximum value. θ I,J This represents the angle between the I-th line and the J-th line within the grid area, (x) I ,y I ) and (x I+1 ,y I+1 Let (x) be the tower coordinates of the I-th line, and (x) be the tower coordinates of the I-th line J ,y J ) and (x J+1 ,y J+1 ) represents the tower coordinates of the Jth line.

9. The method for identifying special corridors of transmission lines according to claim 6, characterized in that, The size of the detection frame in S41 is 600m × 600m.

10. A special corridor identification device for power transmission lines, characterized in that, The method includes at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 9.

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