CN111272117B - Overhead transmission line sag on-line monitoring system - Google Patents
Overhead transmission line sag on-line monitoring system Download PDFInfo
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- CN111272117B CN111272117B CN202010256388.7A CN202010256388A CN111272117B CN 111272117 B CN111272117 B CN 111272117B CN 202010256388 A CN202010256388 A CN 202010256388A CN 111272117 B CN111272117 B CN 111272117B
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention discloses an overhead transmission line sag online monitoring system, which comprises a map acquisition unit, a monitoring unit and a control unit, wherein the map acquisition unit is used for acquiring a digital map and a topographic map within a to-be-monitored range; the power transmission line iron tower acquisition unit is used for acquiring a design drawing of a power transmission line iron tower within a range to be monitored and acquiring the size and outline information of the power transmission line iron tower; the three-dimensional data acquisition unit is used for acquiring tree data and building data which are potentially threatening the power transmission line along the power transmission line at regular time; the three-dimensional modeling unit is used for establishing a three-dimensional model of the power transmission line according to the data acquired by the map acquisition unit, the power transmission line iron tower acquisition unit and the three-dimensional data acquisition unit; the sag detection unit is used for acquiring sag information of the power transmission line in real time; and the central processing unit is respectively connected with the three-dimensional modeling unit and the sag detection unit.
Description
Technical Field
The invention relates to an overhead transmission line sag online monitoring system.
Background
With the rapid development of the electric power industry in China, the requirements of people on the safety and the reliability of an electric power system are higher and higher. The high-voltage overhead transmission line is one of important components of a power transmission system, and needs to be effectively monitored in real time in order to ensure the safety and reliability of the power system. Sag detection is one of important contents for monitoring a power transmission line, and sag is the vertical distance between the lowest point of a wire and a connecting line between two suspension points on a flat ground when the suspension heights of the wires on two adjacent base electric poles are the same. Generally, when the transmission distance is long, due to the self weight of the conductor, an arc sag is formed, so that the conductor is in the shape of a catenary. If the sag is too small, the load of the tower is increased, and further accidents such as wire breakage, tower falling, string falling and the like can occur; if the arc sag is too large, the wire can contact trees, buildings and the like on the ground and discharge electricity, so that the line is tripped and powered off. Because the transmission line is influenced by the natural environment for a long time, the sag changes to a certain extent, and the sag needs to be detected so as to ensure the safe operation of the transmission line. At present, the sag monitoring of the power transmission line mainly adopts a manual inspection method, and the manual inspection method has low efficiency and low accuracy.
Disclosure of Invention
The invention aims to provide an overhead transmission line sag online monitoring system to solve the problems of low sag monitoring efficiency and low accuracy of the existing transmission line.
In order to solve the technical problem, the invention provides an overhead transmission line sag online monitoring system, which comprises
The map acquisition unit is used for acquiring a digital map and a topographic map within a range to be monitored;
the power transmission line iron tower acquisition unit is used for acquiring a design drawing of the power transmission line iron tower within a range to be monitored and acquiring the size and outline information of the power transmission line iron tower;
the three-dimensional data acquisition unit is used for acquiring tree data and building data which are potentially threatening the power transmission line along the power transmission line at regular time;
the three-dimensional modeling unit is respectively in communication connection with the map acquisition unit, the power transmission line iron tower acquisition unit and the three-dimensional data acquisition unit and is used for establishing a three-dimensional model of the power transmission line according to the data acquired by the map acquisition unit, the power transmission line iron tower acquisition unit and the three-dimensional data acquisition unit;
the sag detection unit is used for acquiring sag information of the power transmission line in real time;
the central processing unit is respectively connected with the three-dimensional modeling unit and the sag detection unit and is used for acquiring sag information of the power transmission line and a three-dimensional model of the power transmission line, reversely deducing the power transmission line between two adjacent tower cranes according to the sag information of the power transmission line and simulating the suspension state of the power transmission line; and finally, embedding the suspension state of the power transmission line into the three-dimensional model of the power transmission line, and calculating the distance between the power transmission line and trees and buildings which have potential threats to the power transmission line.
Furthermore, the three-dimensional modeling unit carries out timing update according to data acquired by the three-dimensional data acquisition unit at regular time, the central processing unit calculates the change of the tree data and the building data according to the data acquired by the three-dimensional data acquisition unit at regular time to update, meanwhile, the future change of the tree and the building is estimated according to the change condition of the tree data and the building data, the estimated result is compared with the data acquired by the three-dimensional data acquisition unit at later stage, and if the difference between the two data is within the range of a preset threshold value, the estimated value is used as the update information of the tree data and the building data in the neutral position acquired by the three-dimensional modeling unit.
Furthermore, the sag detection unit comprises a UWB base station arranged on a power transmission line iron tower and a movable monitoring unit arranged on a power transmission line and sliding along the power transmission line, and the movable monitoring unit is provided with a UWB tag in communication connection with the UWB base station; the activity monitoring unit includes a housing; the shell is hung on a power transmission line through a sliding seat arranged at the top of the shell, and a wire passing hole matched with the power transmission line is formed in the sliding seat; the image collector and the UWB tag are arranged on the top of the sliding seat; the front end and the rear end of the shell are respectively provided with a micro air heater, and the air blowing ports of the two micro air heaters respectively face the power transmission lines on the front side and the rear side of the shell; a first controller respectively electrically connected with the UWB tag, the image collector and the two micro air heaters, an environment monitoring assembly and a first wireless communication module respectively electrically connected with the first controller are arranged in the shell; the UWB base station is connected with a second controller, and the second controller is connected with a second wireless communication module.
Further, the sliding seat comprises an upper sliding seat and a lower sliding seat which are detachably connected; and a groove is formed in the middle of one surface of the lower sliding seat, which is in contact with the upper sliding seat, and the power transmission line is arranged in the groove.
Furthermore, the sag monitoring device also comprises a power supply unit for supplying power to the sag monitoring device, wherein the power supply unit comprises an induction power-taking module for inductively taking power from a power transmission line and a power supply point circuit connected with the induction power-taking module; the induction electricity taking module comprises an upper electromagnetic induction iron core with a straight-line-shaped section and a lower electromagnetic induction iron core with a U-shaped section, the upper electromagnetic induction iron core and the lower electromagnetic induction iron core enclose to form a four-frame-shaped structure with an air gap in the section, a power transmission line is arranged in the middle of the four-frame-shaped structure, and an induction coil is wound on the lower electromagnetic induction iron core; the power supply circuit comprises a rectifying circuit, a front-end voltage stabilizing circuit and a voltage conversion circuit which are sequentially connected, and the input end of the rectifying circuit is connected with the secondary winding of the induction power taking module.
Furthermore, the upper electromagnetic induction iron core is arranged in the upper sliding seat, and the lower electromagnetic induction iron core is arranged in the lower sliding seat.
Furthermore, the image collector is installed at the top of the sliding seat through a universal cradle head.
Further, the environment monitoring assembly comprises a temperature sensor, a wind speed and direction sensor and a humidity sensor which are used for monitoring environment parameters around the power transmission line.
The invention has the beneficial effects that: firstly, map, terrain, power transmission line iron tower information in a detection range, tree data and building data which are used for the power transmission line and have potential threats along the power transmission line are detected, and a three-dimensional model of the power transmission line is constructed; and deducing the suspension state of the power transmission line between two adjacent tower cranes according to the sag information of the power transmission line acquired from the next step, and finally embedding the suspension state of the power transmission line into a three-dimensional model of the power transmission line to calculate the distance between the power transmission line and trees and buildings which have potential threats to the power transmission line. The application can simulate the surrounding environment of the power transmission line, place the power transmission line in the simulated environment, comprehensively simulate the distance between the power transmission line and trees and buildings which have potential threats to the power transmission line, and protect the safe operation of the power transmission line to the maximum extent.
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The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic diagram of a UWB tag and UWB base station installation of one embodiment of the present invention;
FIG. 3 is a schematic diagram of an activity monitoring unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a carriage according to an embodiment of the present invention.
Wherein: 1. a power transmission line; 2. an activity monitoring unit; 3. a UWB tag; 31. a UWB base station; 4. an image collector; 41. a universal head; 5. a slide base; 51. a wire passing hole; 52. an upper slide base; 53. a lower slide base; 6. A micro air heater; 61. an air blowing port; 7. a power supply circuit; 71. an electromagnetic induction iron core is arranged; 72. a lower electromagnetic induction core; 73. an induction coil; 8. a first controller; 9. a temperature sensor; 91. a humidity sensor; 92. a wind speed and direction sensor; 10. a first wireless communication module.
Detailed Description
The sag online monitoring system of the overhead transmission line shown in fig. 1 comprises a map acquisition unit, a transmission line 1 iron tower acquisition unit, a map acquisition unit, a three-dimensional data acquisition unit, a three-dimensional modeling unit, a sag detection unit and a central processing unit; the map acquisition unit is used for acquiring a digital map and a topographic map within a range to be monitored; the power transmission line 1 iron tower acquisition unit is used for acquiring a design drawing of the power transmission line 1 iron tower within a range to be monitored and acquiring the size and contour information of the power transmission line 1 iron tower; the three-dimensional data acquisition unit is used for acquiring tree data and building data which are potentially threatening the power transmission line 1 along the power transmission line at regular time; the three-dimensional modeling unit is respectively in communication connection with the map acquisition unit, the transmission line 1 iron tower acquisition unit and the three-dimensional data acquisition unit and is used for establishing a three-dimensional model of the transmission line according to data acquired by the map acquisition unit, the transmission line 1 iron tower acquisition unit and the three-dimensional data acquisition unit by adopting three-dimensional modeling software; the sag detection unit is used for acquiring sag information of the power transmission line in real time; the central processing unit is respectively connected with the three-dimensional modeling unit and the sag detection unit and is used for acquiring sag information of the power transmission line and a three-dimensional model of the power transmission line, reversely deducing the power transmission line 1 between two adjacent tower cranes according to the sag information of the power transmission line and simulating the suspension state of the power transmission line (namely an arc line of the power transmission line 1); and finally, embedding the suspension state of the power transmission line into the three-dimensional model of the power transmission line, and calculating the distance between the power transmission line and trees and buildings which have potential threats to the power transmission line 1.
Firstly, map, terrain, power transmission line 1 iron tower information in a detection range, tree data and building data which are along the power transmission line and have potential threats to the power transmission line 1 are detected, and a three-dimensional model of the power transmission line is constructed; and deducing the suspension state of the power transmission line 1 between two adjacent tower cranes according to the sag information of the power transmission line acquired from the next step, and finally embedding the suspension state of the power transmission line into a three-dimensional model of the power transmission line to calculate the distance between the power transmission line and trees and buildings which have potential threats to the power transmission line 1. The application can simulate the surrounding environment of the power transmission line, place the power transmission line in the simulated environment, comprehensively simulate the distance between the power transmission line and trees and buildings which have potential threats to the power transmission line 1, and protect the safe operation of the power transmission line 1 to the maximum extent.
According to one embodiment of the application, the three-dimensional modeling unit carries out timing update according to data acquired by the three-dimensional data acquisition unit at regular time, the central processing unit calculates the change of the tree data and the building data according to the data acquired by the three-dimensional data acquisition unit at regular time to update, meanwhile, the future change of the tree and the building is estimated according to the change condition of the tree data and the building data, the estimated result is compared with the data acquired by the three-dimensional data acquisition unit at each later stage, and if the difference between the two data is within the range of the preset threshold value after a plurality of comparisons, the estimated value is used as the update information of the tree data and the building data in the neutral position acquired by the three-dimensional modeling unit; if the difference between the two data exceeds the preset threshold range after a plurality of comparisons, the acquisition frequency of the three-dimensional data acquisition unit is increased, the updating speed of the tree data and the building data is increased, and the monitoring efficiency is improved.
According to one embodiment of the application, the sag detection unit comprises a UWB base station 31 installed on a power transmission line 1 iron tower, and a movable monitoring unit 2 installed on the power transmission line 1 and sliding along the power transmission line 1, wherein a UWB tag 3 in communication connection with the UWB base station 31 is arranged on the movable monitoring unit 2; the activity monitoring unit 2 comprises a housing; the shell is hung on the power transmission line 1 through a sliding seat 5 arranged at the top of the shell, and a wire passing hole 51 matched with the power transmission line 1 is formed in the sliding seat 5; the image collector 4 and the UWB tag 3 are arranged on the top of the sliding seat 5; the front end and the rear end of the shell are respectively provided with a micro air heater 6, and the air blowing ports 61 of the two micro air heaters 6 respectively face the power transmission lines 1 on the front side and the rear side of the shell; a first controller 8 which is respectively and electrically connected with the UWB tag 3, the image collector 4 and the two micro air heaters 6, an environment monitoring component which is respectively and electrically connected with the first controller 8 and a first wireless communication module 10 are arranged in the shell; the UWB base station 31 is connected to a second controller, and the second controller is connected to a second wireless communication module; the first controller 8 communicates with the wireless communication module configured to the central processing unit through the first wireless communication module 10, and the second controller communicates with the wireless communication module configured to the central processing unit through the second wireless communication module.
The first controller 8 and the second controller can adopt a DSP microcontroller or an STM32F103CT86 singlechip and the like; chips and sensors adopted by the first controller 8 and the second controller can be purchased from the market, manufacturers have instructions on typical circuit structures, pin functions and the like, and users can directly select and connect; the control circuit can only identify digital signals, so the preprocessing circuit is used for processing the analog signals output by the sensors to form digital signals, and the preprocessing circuit sequentially comprises a filter circuit and an analog-to-digital conversion circuit, wherein the filter circuit and the analog-to-digital conversion circuit can adopt multi-channel circuits or single channels and correspond to the sensors one by one, belong to the prior art, and are not described herein.
And, this application should gather the image of power transmission line 1 through setting up image collector 4 on activity monitoring unit 2 to whether there is the foreign matter and whether cover ice on the monitoring center staff can long-range timely discovery power transmission line 1, when having the foreign matter on the discovery power transmission line 1, remind the staff in time to clear up.
In addition, when the power transmission line 1 is coated with ice, the sag position of the power transmission line 1 may be changed due to the uneven ice coating, and the movable monitoring unit 2 is frozen on the power transmission line 1 and cannot move, so that the monitoring data may have deviation; this application sets up miniature air heater 6 respectively through the side around activity monitoring unit 2, when discovering that power transmission line 1 icing, can carry out the deicing through miniature air heater 6, makes activity monitoring unit 2 can freely slide on power transmission line 1.
According to one embodiment of the present application, said slide 5 comprises an upper slide 52 and an upper slide 53, which are removably connected; a groove is formed in the middle of one surface, which is in contact with the upper sliding seat 52, of the upper sliding seat 53, and the power transmission line 1 is arranged in the groove; the activity monitoring unit 2 is suspended on the transmission line 1 by means of a slide 5.
According to one embodiment of the application, the sag monitoring device further comprises a power supply unit for supplying power to the sag monitoring device, wherein the power supply unit comprises an induction power-taking module for taking power from a power transmission line in an induction manner and a power supply point circuit connected with the induction power-taking module; the induction electricity taking module comprises an upper electromagnetic induction iron core 71 with a straight-line-shaped section and a lower electromagnetic induction iron core 72 with a U-shaped section, the upper electromagnetic induction iron core 71 and the lower electromagnetic induction iron core 72 are enclosed to form a four-frame-shaped structure with an air gap in the section, the power transmission line 1 is arranged in the middle of the four-frame-shaped structure, and an induction coil 73 is wound on the lower electromagnetic induction iron core 72; the power supply circuit 7 comprises a rectifying circuit, a front-end voltage stabilizing circuit and a voltage conversion circuit which are sequentially connected, and the input end of the rectifying circuit is connected with the secondary winding of the induction power taking module. According to an embodiment of the present application, the upper electromagnetic induction core 71 is built in the upper slide 52, and the lower electromagnetic induction core 72 is built in the upper slide 53; by incorporating the upper electromagnetic induction core 71 and the lower electromagnetic induction core 72 in the fabrication, the installation can be facilitated and the apparatus volume can be reduced.
According to one embodiment of the application, the image collector 4 is mounted on the top of the sliding base 5 through a universal cradle head 41; the image acquisition angle of the image acquisition device 4 can be adjusted by setting the universal tripod head 41 and the control command sent by the second controller to the universal tripod head 41.
According to one embodiment of the application, the environment monitoring assembly comprises a temperature sensor 9, a wind speed and direction sensor 92 and a humidity sensor 91 for monitoring environmental parameters around the transmission line 1. The temperature sensor 9, the wind speed and direction sensor 92 and the humidity sensor 91 are used for respectively collecting the temperature, the wind speed and the wind direction and the humidity of the periphery of the power transmission line 1, so that the comprehensive monitoring of the power transmission line is facilitated, and the reference basis for monitoring and maintaining the power transmission line is provided conveniently.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. An overhead transmission line sag on-line monitoring system is characterized by comprising
The map acquisition unit is used for acquiring a digital map and a topographic map within a range to be monitored;
the power transmission line iron tower acquisition unit is used for acquiring a design drawing of the power transmission line iron tower within a range to be monitored and acquiring the size and outline information of the power transmission line iron tower;
the three-dimensional data acquisition unit is used for acquiring tree data and building data which are potentially threatening the power transmission line along the power transmission line at regular time;
the three-dimensional modeling unit is respectively in communication connection with the map acquisition unit, the power transmission line iron tower acquisition unit and the three-dimensional data acquisition unit and is used for establishing a three-dimensional model of the power transmission line according to the data acquired by the map acquisition unit, the power transmission line iron tower acquisition unit and the three-dimensional data acquisition unit;
the sag detection unit is used for acquiring sag information of the power transmission line in real time; the sag detection unit comprises a UWB base station arranged on a power transmission line iron tower and a movable monitoring unit arranged on a power transmission line and sliding along the power transmission line, and a UWB tag in communication connection with the UWB base station is arranged on the movable monitoring unit; the activity monitoring unit includes a housing; the shell is hung on a power transmission line through a sliding seat arranged at the top of the shell, and a wire passing hole matched with the power transmission line is formed in the sliding seat; the image collector and the UWB tag are arranged on the top of the sliding seat; the front end and the rear end of the shell are respectively provided with a micro air heater, and the air blowing ports of the two micro air heaters respectively face the power transmission lines on the front side and the rear side of the shell; a first controller respectively electrically connected with the UWB tag, the image collector and the two micro air heaters, an environment monitoring assembly and a first wireless communication module respectively electrically connected with the first controller are arranged in the shell; the UWB base station is connected with a second controller, and the second controller is connected with a second wireless communication module;
the central processing unit is respectively connected with the three-dimensional modeling unit and the sag detection unit and is used for acquiring sag information of the power transmission line and a three-dimensional model of the power transmission line, reversely deducing the power transmission line between two adjacent tower cranes according to the sag information of the power transmission line and simulating the suspension state of the power transmission line; and finally, embedding the suspension state of the power transmission line into the three-dimensional model of the power transmission line, and calculating the distance between the power transmission line and trees and buildings which have potential threats to the power transmission line.
2. The overhead transmission line sag on-line monitoring system according to claim 1, wherein the three-dimensional modeling unit performs timing update according to data acquired by the three-dimensional data acquisition unit at regular time, the central processing unit calculates changes of the tree data and the building data according to the data acquired by the three-dimensional data acquisition unit at regular time to perform update, meanwhile, the future changes of the tree and the building are estimated according to the changes of the tree data and the building data, the estimated result is compared with the data acquired by the three-dimensional data acquisition unit at the later stage, and if the difference between the two data is within a preset threshold range, the estimated value is used as the update information of the tree data and the building data in the collection neutral position of the three-dimensional modeling unit.
3. The overhead transmission line sag on-line monitoring system according to claim 1, wherein the slide comprises an upper slide and a lower slide which are detachably connected; and a groove is formed in the middle of one surface of the lower sliding seat, which is in contact with the upper sliding seat, and the power transmission line is arranged in the groove.
4. The overhead transmission line sag on-line monitoring system according to claim 3, further comprising a power supply unit for supplying power to the device, wherein the power supply unit comprises an induction power-taking module for inductively taking power from a transmission line and a power supply circuit connected with the induction power-taking module; the induction electricity taking module comprises an upper electromagnetic induction iron core with a straight-line-shaped section and a lower electromagnetic induction iron core with a U-shaped section, the upper electromagnetic induction iron core and the lower electromagnetic induction iron core enclose to form a four-frame-shaped structure with an air gap in the section, a power transmission line is arranged in the middle of the four-frame-shaped structure, and an induction coil is wound on the lower electromagnetic induction iron core; the power supply circuit comprises a rectifying circuit, a front-end voltage stabilizing circuit and a voltage conversion circuit which are sequentially connected, and the input end of the rectifying circuit is connected with the secondary winding of the induction power taking module.
5. The overhead transmission line sag on-line monitoring system according to claim 4, wherein the upper electromagnetic induction core is built in the upper sliding base, and the lower electromagnetic induction core is built in the lower sliding base.
6. The overhead transmission line sag on-line monitoring system according to claim 5, wherein the image collector is mounted on the top of the sliding base through a universal cradle head.
7. The overhead transmission line sag on-line monitoring system according to claim 1, wherein the environment monitoring assembly comprises a temperature sensor, a wind speed and a wind direction sensor and a humidity sensor for monitoring environmental parameters around the transmission line.
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