Measurement positioning method of power distribution network line corridor

Abstract

The invention relates to a measuring and positioning method for a power distribution network line corridor, which comprises the following steps of: shooting by utilizing a radar satellite according to preset starting point information, terminal point information and landmark object capturing conditions, forming image data, calculating and generating a vector diagram by utilizing an application server according to the image, and finally, obtaining a power distribution network line corridor. The method comprises the following steps: firstly, generating high-precision three-dimensional model map data of a power transmission line channel, finally, effectively identifying and extracting trees and obstacles in a channel corridor through image fusion analysis, and finally, generating an optimal power transmission line erection line while avoiding the trees and the obstacles in the corridor according to a vector diagram and data information of the trees and the obstacles in the channel corridor. Afterwards, according to the generated erection route, marking the pole tower, obtaining position data of the pole tower, and calculating to obtain a conductor arc formed on the cross section due to wind deflection based on a catenary equation of the conductor at the same time; the device has the advantages of being reasonable in design and accurate and convenient to operate and use.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power transmission, and in particular relates to a method for measuring and locating a distribution network line corridor. Background Art

[0002] The distribution network transmission line corridor refers to a strip area under the line with a specified width extending to both sides along the side conductors of the high-voltage overhead power line; in this strip area, trees that may cause safety hazards are called tree barriers; if the distance between the conductors in the transmission line and the tree barriers is less than the minimum safety distance, it will cause a short circuit in the transmission line, and then cause tripping, resulting in a failure to supply power normally; in addition, the transmission line will also be affected by weather changes. In thunderstorms, trees near the transmission line will leak electricity and conduct electricity in the rain, causing the line to short-circuit, or pose a great threat to human life and animal safety; therefore, in order to solve the above problems, it is necessary to develop a measurement and positioning method for the distribution network line corridor that is reasonably designed and accurate and convenient to operate. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a method for measuring and locating a distribution network line corridor that is reasonably designed and accurately and conveniently operated.

[0004] The object of the present invention is achieved in this way: a method for measuring and locating a distribution network line corridor comprises the following steps: Step 1: Input the preset starting point information, preset end point information and landmark capture conditions of the transmission line; Step 2: Use synthetic aperture radar satellites to photograph the preset starting point, preset end point, and calibrated landmarks between the preset starting point and the preset end point that meet the landmark capture conditions of the transmission line corridor, thereby forming image data, and then transmit the image data cloud platform to the application server in real time; Step 3: Based on the image, the application server is used to calculate and generate a vector map. Then, the radar scanning system is used to obtain high-precision laser radar point cloud data of the area. The point cloud processing system is used to filter, classify, extract, and make a three-dimensional model of the collected laser point cloud data, and finally generate high-precision three-dimensional model map data of the transmission line channel; Step 4: Through the fusion analysis of 3D real scene information and lidar channel base map, the clutter processor is used to effectively identify and extract trees and obstacles in the channel corridor; Step 5: According to the vector diagram in step 3 and the data information of the trees and obstacles in the corridor in step 4, the height difference between the height of the transmission line and the tree barrier is calculated, so as to obtain the clearance height value of the tree barrier in the corridor of the transmission line; then, according to the location information of the preset starting point and the location information of the preset end point of the transmission line, the best transmission line erection route is generated while avoiding the trees and obstacles in the corridor; Step 6: According to the optimal transmission line erection route generated in step 5, pole towers are marked on the transmission lines, and the position data of the pole towers are obtained; Step 7: Generate a three-dimensional image of the line corridor based on the location data of the tower. Then, based on the catenary equation of the conductor, calculate the conductor arc formed on the section due to wind deflection. The radius of the circle is the sag at that point.

[0005] Furthermore, in step 2, extracting the characteristic value of each calibration landmark according to the setting conditions of the calibration landmark also includes: calling the laying line view, and generating the landmark image of each calibration landmark in the laying line view.

[0006] Furthermore, the clutter processor is a single chip microcomputer, which uses the characteristic that the reflectivity of metal and non-metal in the millimeter wave band is extremely different to set a threshold value for distinguishing poles, lines and background objects.

[0007] The beneficial effects of the present invention are as follows: the present invention firstly uses a synthetic aperture radar satellite to shoot the calibration landmark through preset starting point information, end point information and landmark capture conditions, and forms image data. Then, according to the image, a vector diagram is calculated and generated by using an application server. Then, high-precision three-dimensional model map data of the transmission line channel is generated. Then, through the fusion analysis of three-dimensional real scene information and the lidar channel base map, a clutter processor is used to realize the effective identification and extraction of trees and obstacles in the channel corridor. Finally, according to the vector diagram and the data information of trees and obstacles in the channel corridor, the trees and obstacles in the corridor are avoided and the optimal transmission line erection route is generated. After completing the above operations, according to the generated optimal transmission line erection route, the pole towers are marked on the transmission line, and the position data of the pole towers are obtained. At the same time, based on the catenary equation of the conductor, the conductor arc formed on the cross section due to wind deviation is calculated. In general, the present invention has the advantages of reasonable design and accurate and convenient operation. DETAILED DESCRIPTION

[0008] The present invention is further described below.

[0009] Embodiment: A method for measuring and locating a distribution network line corridor comprises the following steps: Step 1: Input the preset starting point information, preset end point information and landmark capture conditions of the transmission line; Step 2: Using a synthetic aperture radar satellite to photograph a preset starting point, a preset end point, and a calibrated landmark between the preset starting point and the preset end point that meets the landmark capture conditions of the transmission line corridor, thereby forming image data, wherein, according to the setting conditions of the calibrated landmark, extracting the characteristic value of each calibrated landmark further includes: calling a laying line view, generating a landmark image of each calibrated landmark in the laying line view; and then transmitting the image data cloud platform to the application server in real time; Step 3: Based on the image, the application server is used to calculate and generate a vector map. Then, the radar scanning system is used to obtain high-precision laser radar point cloud data of the area. The point cloud processing system is used to filter, classify, extract, and make a three-dimensional model of the collected laser point cloud data, and finally generate high-precision three-dimensional model map data of the transmission line channel; Step 4: Through the fusion analysis of 3D real scene information and lidar channel base map, the clutter processor is used to effectively identify and extract trees and obstacles in the channel corridor. The clutter processor is a single-chip microcomputer. It uses the extremely different reflectivity of metal and non-metal in the millimeter wave band to set a threshold value to distinguish towers, lines and background objects. Step 5: According to the vector diagram in step 3 and the data information of the trees and obstacles in the corridor in step 4, the height difference between the height of the transmission line and the tree barrier is calculated, so as to obtain the clearance height value of the tree barrier in the corridor of the transmission line; then, according to the location information of the preset starting point and the location information of the preset end point of the transmission line, the best transmission line erection route is generated while avoiding the trees and obstacles in the corridor; Step 6: According to the optimal transmission line erection route generated in step 5, pole towers are marked on the transmission lines, and the position data of the pole towers are obtained; Step 7: Generate a three-dimensional image of the line corridor based on the location data of the tower. Then, based on the catenary equation of the conductor, calculate the conductor arc formed on the section due to wind deflection. The radius of the circle is the sag at that point.

[0010] When the present invention is used, first, through the preset starting point information, end point information and landmark capture conditions, the synthetic aperture radar satellite is used to shoot the preset starting point, preset end point and the calibrated landmarks between the preset starting point and the preset end point that meet the landmark capture conditions of the transmission line corridor, thereby forming image data. After that, the image data cloud platform is transmitted to the application server in real time, and the application server is used to calculate and generate a vector map based on the image image. Then, the high-precision laser radar point cloud data of the area is obtained through the radar scanning system, and the collected laser point cloud data is filtered, point cloud classified, extracted, and three-dimensional modeled by the point cloud processing system, so as to generate high-precision three-dimensional model map data of the transmission line channel. Finally, through the three-dimensional real scene information and the laser radar channel The base map is fused and analyzed, and the clutter processor is used to realize the effective identification and extraction of trees and obstacles in the channel corridor. Finally, according to the vector map and the data information of the trees and obstacles in the channel corridor, the height difference between the transmission line height and the tree barrier is calculated, so as to obtain the clearance height value of the tree barrier in the transmission line corridor. At the same time, according to the location information of the preset starting point and the preset end point of the transmission line, the trees and obstacles in the corridor are avoided, and the optimal transmission line erection route is generated. After completing the above operations, according to the generated optimal transmission line erection route, the pole towers are marked on the transmission line, and the position data of the pole towers are obtained. At the same time, based on the catenary equation of the conductor, the conductor arc formed on the cross section due to wind deviation is calculated; in general, the present invention has the advantages of reasonable design and accurate and convenient operation.

[0011] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for measuring and locating a distribution network line corridor, characterized in that: The following steps are involved: Step 1: Input the preset starting point information, preset end point information and landmark capture conditions of the transmission line; Step 2: Use synthetic aperture radar satellites to photograph the preset starting point, preset end point, and calibrated landmarks between the preset starting point and the preset end point that meet the landmark capture conditions of the transmission line corridor, thereby forming image data, and then transmit the image data cloud platform to the application server in real time; Step 3: Based on the image, the application server is used to calculate and generate a vector map. Then, the radar scanning system is used to obtain high-precision laser radar point cloud data of the area. The point cloud processing system is used to filter, classify, extract, and make a three-dimensional model of the collected laser point cloud data, and finally generate high-precision three-dimensional model map data of the transmission line channel; Step 4: Through the fusion analysis of 3D real scene information and lidar channel base map, the clutter processor is used to effectively identify and extract trees and obstacles in the channel corridor; Step 5: According to the vector diagram in step 3 and the data information of the trees and obstacles in the corridor in step 4, the height difference between the height of the transmission line and the tree barrier is calculated, so as to obtain the clearance height value of the tree barrier in the corridor of the transmission line; then, according to the location information of the preset starting point and the location information of the preset end point of the transmission line, the best transmission line erection route is generated while avoiding the trees and obstacles in the corridor; Step 6: According to the optimal transmission line erection route generated in step 5, pole towers are marked on the transmission lines, and the position data of the pole towers are obtained; Step 7: Generate a three-dimensional image of the line corridor based on the location data of the tower. Then, based on the catenary equation of the conductor, calculate the conductor arc formed on the section due to wind deflection. The radius of the circle is the sag at that point.

2. A method for measuring and locating a distribution network line corridor according to claim 1, characterized in that: In the step 2, extracting the characteristic value of each calibration landmark according to the setting conditions of the calibration landmark also includes: calling the laying line view, and generating the landmark image of each calibration landmark in the laying line view.

3. A method for measuring and locating a distribution network corridor according to claim 1, characterized in that: The clutter processor is a single chip microcomputer, which uses the characteristic that the reflectivity of metal and non-metal in the millimeter wave band is extremely different to set a threshold value for distinguishing poles, lines and background objects.