CN114389223B - Intelligent deicing system and method for overhead transmission line - Google Patents
Intelligent deicing system and method for overhead transmission line Download PDFInfo
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- CN114389223B CN114389223B CN202111503299.9A CN202111503299A CN114389223B CN 114389223 B CN114389223 B CN 114389223B CN 202111503299 A CN202111503299 A CN 202111503299A CN 114389223 B CN114389223 B CN 114389223B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0616—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating
- G01B11/0625—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material of coating with measurement of absorption or reflection
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses an intelligent deicing system and method for an overhead transmission line, wherein the deicing system comprises a transmission line icing monitoring platform, an intelligent shock wave deicing module and a deicing efficiency calculation module, and the transmission line icing monitoring platform comprises a laser sensor, a laser reflector, a data receiver and a data processor; the intelligent shock wave deicing module comprises a shock wave deicing device provided with a shock wave collecting and transmitting port, and the shock wave deicing device is connected to the lowest position of a power transmission line to be deiced; the deicing efficiency calculation module calculates deicing efficiency according to the thickness of the ice coating before deicing and the thickness of the ice coating after deicing, which are monitored by the ice coating monitoring platform of the power transmission line. According to the invention, the automatic monitoring of the icing thickness of the power transmission line is realized, the detection efficiency of the icing thickness of the power transmission line is improved, the shock wave deicing device can release shock waves more uniformly, and the shock wave deicing device can be taken down smoothly through an unmanned plane.
Description
Technical Field
The invention belongs to the technical field of power transmission and transformation, and particularly relates to an overhead transmission line deicing technology.
Background
When the ice coating is serious, once the load of the power transmission line exceeds the self Zhang Jiangdu resistance, the power transmission line can cause power grid disasters such as wire galloping, wire breakage, tower falling, ice coating flickering and the like.
The existing deicing technology for the power transmission line is mainly divided into: electrothermal deicing, mechanical deicing, and natural deicing. Electrothermal deicing is deicing and anti-icing using an additional heat source or self-heating. The short-circuit current deicing efficiency is high, but the deicing method cannot be applied to ground wires and lightning rods, and deicing can be performed on the power transmission line with the level of more than 500kv, and the cost is high. Direct current deicing has been successfully applied to deicing of ultra-high voltage and ultra-high transmission lines, but investment cost is huge. The mechanical deicing method is that electromagnetic force or electric pulse makes the wire produce strong vibration in a control range to deicing, and has certain effect on rime, so rime is difficult to clean, and the fatigue of the power transmission line is caused. The high-frequency high-voltage excitation deicing technology is still immature, and has strong electromagnetic interference on a power grid. "ad hoc" deicing has limited efficiency and very poor safety. Deicing by the pulley scraping method is limited by factors such as geographical environment. Coupled resonance methods are difficult to use in engineering practice. The deicing efficiency of the robot is faster and has been applied, but obstacle surmounting is required and the intelligent level of the control system is relied on. Although the natural deicing method has low cost, the natural deicing method has limited efficiency, high contingency and poor timeliness.
Therefore, the existing transmission line has poor deicing effect, high implementation cost and high construction difficulty, and the invention is urgent to invent a high-efficiency and intelligent transmission line deicing technology.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent deicing system for an overhead transmission line, which can identify the icing thickness of the transmission line and effectively deicing.
In order to solve the technical problems, the invention adopts the following technical scheme:
an intelligent deicing system for overhead transmission lines comprises a transmission line icing monitoring platform, an intelligent shock wave deicing module and a deicing efficiency calculation module,
the power transmission line icing monitoring platform comprises a laser sensor, a laser reflector, a data receiver and a data processor, wherein the laser sensor is hung on a power transmission line and is used for emitting and receiving laser, the laser reflector is arranged on the ground and is used for reflecting the laser emitted by the laser sensor, the data receiver receives the time from the laser emission to the laser receiving of the laser sensor, and the data processor calculates the fall of the power transmission line before and after icing according to the distance between the power transmission line before and after icing and the ground, and calculates the icing thickness of the power transmission line;
the intelligent shock wave deicing module comprises a shock wave deicing device provided with a shock wave collecting and transmitting port, wherein the shock wave deicing device is connected to the lowest part of a power transmission line to be deiced, and deicing is carried out by applying shock waves;
the deicing efficiency calculation module calculates deicing efficiency according to the thickness of the ice coating before deicing and the thickness of the ice coating after deicing, which are monitored by the ice coating monitoring platform of the power transmission line,
wherein, beta is deicing efficiency, b1 is ice coating thickness before deicing, and b2 is ice coating thickness after deicing.
Preferably, the distances between the lowest point and the highest point of the power transmission line and the ground are respectively measured in two times, and the difference between the two is sag; the inclination angle can be obtained through calculation of the formula (3), the load concentration is obtained through calculation of the formula (2), the weight is obtained through calculation of the formula (4), and the ice thickness is obtained through calculation of the formula (5);
G＝qL (4)
wherein alpha is an inclination angle, q is a load concentration degree, H is an initial running tension of a suspension cable, G is a gravity, f is a sagging degree, b is a thickness of ice coating, ρ is a standard specific gravity of ice, R is a radius of a transmission line, and L is a length of the transmission line.
Preferably, the shock wave deicing device is connected with a hanging rope, a key ring connector is arranged at the head end of the hanging rope, and the key ring connector is connected with the power transmission line.
Preferably, the shock wave deicing device is of a cylindrical structure.
Preferably, the shock wave deicing device applies shock waves with corresponding sizes according to the thickness of the ice coating.
Preferably, the relation between the thickness of the ice coating and the shock wave to be released is determined experimentally.
Preferably, the intelligent shock wave deicing module comprises unmanned aerial vehicle equipment, and the shock wave deicing device is plugged to the power transmission line through the unmanned aerial vehicle equipment.
The invention also provides an intelligent deicing method for the overhead transmission line, which is applied to deicing and comprises the following steps:
firstly, dragging a laser sensor to a position to be measured through unmanned plane equipment, hanging the laser sensor to emit and receive laser, fixing a laser reflector on the ground of the same vertical line of the position to be measured, and carrying out laser reflection; according to the time required from the laser sensor to the laser receiving, a data processor is used for obtaining the sag, the dip angle, the load concentration and the weight of the power transmission line, and the ice coating thickness is deduced by combining a parabolic or catenary method;
then, applying shock waves into the shock wave deicing device according to the icing thickness of the power transmission line, hanging the shock wave deicing device to the power transmission line by using unmanned aerial vehicle equipment, bolting the shock wave deicing device to the lowest end of the power transmission line, releasing the shock waves for deicing, and taking down the shock wave deicing device by using the unmanned aerial vehicle equipment after deicing is finished and conveying the shock wave deicing device to the ground;
after deicing is finished, a laser sensor is started to measure the height of the bottommost end of the transmission line after deicing, so that corresponding sagging, inclination angle, load concentration and gravity are obtained, the icing thickness of the transmission line at the moment is calculated, and the impact wave deicing efficiency is calculated by comparing the thickness during icing.
The technical scheme adopted by the invention has the following beneficial effects:
1. the power transmission line icing detection platform utilizes a laser sensor fixed on a power transmission line to measure the sag of the point, utilizes a data processor to obtain the power transmission line icing thickness and other power transmission line elements by combining a catenary method or a parabolic method, realizes the automatic monitoring of the power transmission line icing thickness, and improves the power transmission line icing thickness detection efficiency.
2. The connection part of the shock wave deicing device and the power transmission line is designed into a key ring shape, and no artificial or other auxiliary devices act, so that falling off can not occur; the power transmission line can be well embedded with the power transmission line, so that the power transmission line is protected to a certain extent; the shock wave deicing device is designed into a cylinder, so that shock waves can be released more uniformly; and the pressure device outside the key ring can help the unmanned aerial vehicle to smoothly take down the shock wave deicing device.
3. And the ice coating detection platform of the power transmission line is combined with the deicing system of the power transmission line to calculate the deicing rate and the deicing efficiency. Whether deicing is completed or not is checked, feasibility of shock wave deicing is verified, and the system is perfected, so that convenience is brought to later improvement.
The specific technical scheme and the beneficial effects of the invention are described in detail in the following detailed description with reference to the accompanying drawings.
Drawings
The invention is further described with reference to the drawings and detailed description which follow:
FIG. 1 is a schematic diagram of a shock wave deicing apparatus;
fig. 2 is a schematic monitoring diagram of an ice coating monitoring platform for a power transmission line;
FIG. 3 is a laser process flow diagram;
fig. 4 is a schematic diagram of a deicing system for a power transmission line;
FIG. 5 is a flow chart of an intelligent icing thickness detection and de-icing system;
description of the marks in the accompanying drawings:
1. a shock wave collecting device; 2. a shock wave emission and collection port; 3. a device hanging end; 4. horizontal projection distance between wires; 5. a key fob connector; 6. a spring; 7. a U-shaped fixing device; 8. a signal input device; 9. a signal processor; 10. a laser receiver; 11. a laser emitter; 12. a signal output device; 13. a detection object; 14. a power transmission line; 15. deicing device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Those skilled in the art will appreciate that the features of the examples and embodiments described below can be combined with one another without conflict.
In the embodiment, an intelligent deicing system for an overhead transmission line and an application method thereof are provided.
Example 1
As shown in fig. 1 to 4, an intelligent deicing system for an overhead transmission line comprises a transmission line icing monitoring platform, an intelligent shock wave deicing module and a deicing efficiency calculation module.
As shown in fig. 2 and 3, the ice coating monitoring platform for the power transmission line mainly comprises a laser sensor, a laser reflector, a data receiver and a data processor.
The laser sensor mainly comprises a signal input device 8, a signal processor 9, a laser receiver 10, a laser transmitter 11 and a signal output device 12; the laser reflector is mainly composed of the detection object 13. The position of the test object 13 should be adjusted to the optimal position a plurality of times so that the error is minimized.
The power transmission line icing detection platform mainly measures the sagging degree through a laser transmitter, and the inclination angle, the load concentration degree, the severity and the icing thickness are calculated by a data processor, so that in order to reduce errors, the power transmission line icing detection platform can be started for multiple times to measure multiple groups of data, the position of a detected object is regulated, and the relatively accurate icing thickness is found out to be used as the deicing thickness.
The icing thickness of the electric transmission line is calculated according to the calculated sagging degree, the platform can measure at any moment of icing, and sagging degree can be measured before, after and in the middle of deicing, so that the deicing progress, the deicing rate and the deicing consumption of other elements can be calculated according to measured data.
The intelligent shock wave deicing module mainly comprises a shock wave deicing device and unmanned aerial vehicle equipment.
As shown in fig. 1 and 4, the shock wave deicing device mainly comprises a shock wave collecting device 1, a shock wave collecting and transmitting port 2, a device hanging end 3 and a key ring connector 5. The key ring connector mainly comprises a spring 6 and a U-shaped fixing device 7, and is similar to the key ring structure, the device hanging end 3 is connected with two connecting wires, the end part of each connecting wire is provided with a key ring connector 5, the key ring connector 5 is hung and buckled on a power transmission line, and the sum of the lengths of the two connecting wires is larger than the horizontal projection distance 4 between the wires. Because the relation between the quantity of the released shock wave and the thickness of the ice coating is unknown, a small quantity of shock wave can be applied first, the thickness of the ice coating can be measured by using the ice coating detection platform of the power transmission line at any time, if the relation between the quantity of released shock wave and the reduction of the thickness of the ice coating is not removed, the shock wave deicing device can be continuously taken down by using the unmanned plane equipment, a proper quantity of shock wave is added, the shock wave is released after the shock wave is carried to the point of the shock wave to be released by the unmanned plane equipment, and the deicing is finished. Through multiple experiments, the relation between the thickness of the ice coating and the shock wave to be released can be obtained in a large quantity. The U-shaped fixing device is similar to the wire in direct size, and can fix the wire in the device well without falling off.
After the impact is released for a certain time, starting an ice coating monitoring platform of the power transmission line, measuring the sagging of the power transmission line at the moment, calculating the inclination angle, the load concentration, the gravity and the ice coating thickness of the power transmission line by using a data processor, and combining the ice coating thickness before deicing to obtain deicing efficiency; the deicing rate is obtained by using the time required for deicing and the deicing thickness during that time.
Example two
An intelligent deicing method for an overhead transmission line, which is implemented by the intelligent deicing system for an overhead transmission line according to the first embodiment, as shown in fig. 5, includes the following steps:
firstly, dragging a laser sensor to a position needing to be measured by an unmanned aerial vehicle, hanging the laser sensor, transmitting and receiving laser, fixing a laser reflector on the ground of the same vertical line of the to-be-measured point, and reflecting the laser; and meanwhile, a signal processor arranged at a workstation reads the time required by the laser sensor to emit and receive the laser, and a data processor is used for obtaining the sag, the dip angle, the load concentration, the gravity and the like of the power transmission line, and the ice coating thickness is deduced by combining a parabolic or catenary method. The specific algorithm is as follows:
the time read by the signal processor is multiplied by half of the wave speed to obtain the distance, and the distance between the lowest point and the highest point of the power transmission line and the ground is measured respectively in two times, wherein the difference between the lowest point and the highest point is sag; the inclination angle can be obtained by combining the formula 3, the load concentration can be obtained by combining the formula II, the weight can be obtained by combining the formula 4, and the ice coating thickness can be obtained by combining the formula 5.
G＝qL (4)
Wherein alpha is an inclination angle, q is a load concentration degree, H is an initial running tension of a suspension cable, G is a gravity, f is a sagging degree, b is a thickness of ice coating, ρ is a standard specific gravity of ice, R is a radius of a transmission line, and L is a length of the transmission line.
According to the thickness of the ice coating of the power transmission line, shock waves are applied to the shock wave deicing device, the shock wave deicing device is hung to the power transmission line by using unmanned aerial vehicle equipment and is bolted to the lowest end of the power transmission line, the shock waves are released to deicing, and the shock wave deicing device is taken down by using the unmanned aerial vehicle equipment and conveyed to the ground after deicing is finished. And after deicing is finished, starting a laser sensor to measure the height of the bottommost end of the transmission line after deicing, obtaining corresponding sagging, inclination angle, load concentration, severity and the like, and calculating the icing thickness of the transmission line at the moment. Comparing the thickness of the ice coating to calculate the deicing efficiency of the shock wave;
deicing efficiency:b1 is the thickness of the ice coating before deicing, and b2 is the thickness of the ice coating after deicing.
While the invention has been described in terms of specific embodiments, it will be appreciated by those skilled in the art that the invention is not limited to the specific embodiments described above. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.
Claims (8)
1. An intelligent deicing system for overhead transmission lines, which is characterized in that: comprises a power transmission line icing monitoring platform, an intelligent shock wave deicing module and a deicing efficiency calculation module,
the power transmission line icing monitoring platform comprises a laser sensor, a laser reflector, a data receiver and a data processor, wherein the laser sensor is hung on a power transmission line and is used for emitting and receiving laser, the laser reflector is arranged on the ground and is used for reflecting the laser emitted by the laser sensor, the data receiver receives the time from the laser emission to the laser receiving of the laser sensor, and the data processor calculates the fall of the power transmission line before and after icing according to the distance between the power transmission line before and after icing and the ground, and calculates the icing thickness of the power transmission line;
the intelligent shock wave deicing module comprises a shock wave deicing device provided with a shock wave collecting and transmitting port, wherein the shock wave deicing device is connected to the lowest part of a power transmission line to be deiced, and deicing is carried out by applying shock waves; the deicing efficiency calculation module calculates deicing efficiency according to the thickness of the ice coating before deicing and the thickness of the ice coating after deicing, which are monitored by the ice coating monitoring platform of the power transmission line,
wherein, beta is deicing efficiency, b1 is ice coating thickness before deicing, and b2 is ice coating thickness after deicing.
2. An intelligent deicing system for an overhead transmission line according to claim 1, characterized in that: the distance between the lowest point and the highest point of the power transmission line and the ground is measured respectively by two times of measurement, and the difference between the lowest point and the highest point is sag; the inclination angle can be obtained through calculation of the formula (3), the load concentration is obtained through calculation of the formula (2), the weight is obtained through calculation of the formula (4), and the ice thickness is obtained through calculation of the formula (5);
G＝qL (4)
wherein alpha is an inclination angle, q is a load concentration degree, H is an initial running tension of a suspension cable, G is a gravity, f is a sagging degree, b is a thickness of ice coating, ρ is a standard specific gravity of ice, R is a radius of a transmission line, and L is a length of the transmission line.
3. An intelligent deicing system for an overhead transmission line according to claim 1, characterized in that: the shock wave deicing device is connected with a hanging rope, a key ring connector is arranged at the head end of the hanging rope, and the key ring connector is connected with the power transmission line.
4. An intelligent deicing system for an overhead transmission line according to claim 1, characterized in that: the shock wave deicing device is of a cylindrical structure.
5. An intelligent deicing system for an overhead transmission line according to claim 1, characterized in that: the shock wave deicing device applies shock waves with corresponding sizes according to the thickness of the ice coating.
6. An intelligent deicing system for an overhead transmission line according to claim 5, wherein: and determining the relation between the ice coating thickness and the shock wave to be released according to the test.
7. An intelligent deicing system for an overhead transmission line according to claim 1, characterized in that: the intelligent shock wave deicing module comprises unmanned aerial vehicle equipment, and the shock wave deicing device is tied to the power transmission line through the unmanned aerial vehicle equipment.
8. An intelligent deicing method for an overhead transmission line, which applies the intelligent deicing system for an overhead transmission line according to any one of claims 1 to 7, comprising the following steps:
firstly, dragging a laser sensor to a point to be measured through unmanned plane equipment, hanging, transmitting and receiving laser, fixing a laser reflector on the ground of the same vertical line of the point to be measured, and reflecting the laser; according to the time required from the laser sensor to the laser receiving, a data processor is used for obtaining the sag, the dip angle, the load concentration and the weight of the power transmission line, and the ice coating thickness is deduced by combining a parabolic or catenary method;
then, applying shock waves into the shock wave deicing device according to the icing thickness of the power transmission line, hanging the shock wave deicing device to the power transmission line by using unmanned aerial vehicle equipment, bolting the shock wave deicing device to the lowest end of the power transmission line, releasing the shock waves for deicing, and taking down the shock wave deicing device by using the unmanned aerial vehicle equipment after deicing is finished and conveying the shock wave deicing device to the ground;
after deicing is finished, a laser sensor is started to measure the height of the bottommost end of the transmission line after deicing, so that corresponding sagging, inclination angle, load concentration and gravity are obtained, the icing thickness of the transmission line at the moment is calculated, and the impact wave deicing efficiency is calculated by comparing the thickness during icing.
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