CN116343561A - Test device for simulating non-uniform icing/deicing of power transmission line - Google Patents
Test device for simulating non-uniform icing/deicing of power transmission line Download PDFInfo
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- CN116343561A CN116343561A CN202310314288.9A CN202310314288A CN116343561A CN 116343561 A CN116343561 A CN 116343561A CN 202310314288 A CN202310314288 A CN 202310314288A CN 116343561 A CN116343561 A CN 116343561A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000001179 sorption measurement Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003550 marker Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 238000011160 research Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
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- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/188—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for motors; for generators; for power supplies; for power distribution
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
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Abstract
The invention discloses a test device for simulating nonuniform icing/deicing of a power transmission line, which comprises a wire shrinkage model, a deicing control device, a tension measurement system and a monocular camera recognition system, wherein the wire shrinkage model is a linear model; the wire scaling model comprises a steel wire rope, a fixed bracket, a suspension string and a suspension ring; the two ends of the steel wire rope are respectively hung on the two side parts of the fixed support through turnbuckle screws, a plurality of hanging strings are uniformly fixed on the middle part of the steel wire rope, and each hanging string is hung on the bottom of the fixed support through the hanging ring; the bottom of the steel wire rope is connected with a plurality of weights with different weights, and the deicing control device is used for controlling the adsorption and falling of the weights; the tension measuring system is connected with the steel wire rope and is used for measuring tension change of the steel wire rope; the monocular camera recognition system is used for monitoring the maximum ice jump height of the steel wire rope. The device can simulate the complex working condition of non-uniform icing/deicing of a real line, and can be used for indoor construction, and has the characteristics of convenience in installation, strong operability and the like.
Description
Technical Field
The invention relates to the technical field of power transmission and distribution simulation, in particular to a test device for simulating nonuniform icing/deicing of a power transmission line.
Background
The icing of the transmission line refers to a natural phenomenon that water or rainfall in the air is frozen into frost. Under the natural conditions of specific temperature, wind and the like, the icing falling off of the power transmission line can cause up-and-down vibration and transverse swing of the power transmission line, and the power transmission line is also called 'ice jump' in engineering. In the deicing skip process of the transmission line, gaps between each phase of wires and between the wires and the ground wire may be smaller than corresponding insulation gap requirements, so that electrical accidents such as interphase flashover, tripping, wire burning and the like are caused, and even mechanical accidents such as transmission tower breakage, tower falling, wire breakage, hardware damage and the like are caused by severe changes of wire tension, so that the safe operation of the transmission line is seriously affected.
CN202947758U discloses a transmission line deicing simulation test system, belongs to the technical field of power transmission and distribution, and its technical scheme is, it includes heavy object, electro-magnet, control circuit and computer, heavy object and electro-magnet all set up a plurality ofly, and a plurality of electro-magnets distribute and hang on steel core aluminium stranded conductor along the steel core aluminium stranded conductor between two transmission towers, and their control coil connects control circuit's different output, and every electro-magnet attracts a heavy object, control circuit communicates with the computer through the serial ports.
Aiming at the ice-removing fault of the ice-covered wire, most students adopt numerical simulation to conduct research, and the research based on the test is very few. Based on finite element numerical simulation, although the whole process of ice-breaking jump can be well simulated, whether the calculated result is true or not still needs to be verified by an actual measurement test. Fresh students can carry out the deicing jump test under the non-uniform icing on the true power transmission line, which is inconvenient to operate and has high cost, thus being unfavorable for wide parameter research. Therefore, it is particularly necessary to develop a scaling model test device which has good operability and can be carried out indoors and is suitable for the research of ice-breaking jump faults under the uneven ice coating of multi-gear lines.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide the test device for simulating the non-uniform icing/deicing of the power transmission line, which can simulate the complex working condition of the non-uniform icing/deicing of the real line, and can be used for indoor construction.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a test device for simulating nonuniform icing/deicing of a power transmission line comprises a wire shrinkage model, a deicing control device, a tension measurement system and a monocular shooting identification system; the wire scaling model comprises a steel wire rope, a fixed bracket, a suspension string and a suspension ring; the two ends of the steel wire rope are respectively hung on the two side parts of the fixed support through turnbuckle screws, a plurality of hanging strings are uniformly fixed on the middle part of the steel wire rope, and each hanging string is hung on the bottom of the fixed support through the hanging ring; the bottom of the steel wire rope is connected with a plurality of weights with different weights, and the deicing control device is used for controlling the adsorption and falling of the weights; the tension measuring system is connected with the steel wire rope and is used for measuring tension change of the steel wire rope; the monocular camera recognition system is used for monitoring the maximum ice jump height of the steel wire rope.
Optionally, the diameter of the steel wire rope is less than 1mm, and the balancing weight is bound.
Optionally, the steel wire rope is segmented at equal intervals and is respectively marked as 1,2, … and i; determining a non-uniform icing form of a scaling test model according to a non-uniform icing form of a real line, determining non-uniform icing amounts of each section of a non-uniform icing grade wire according to a formula (1), and then simulating the non-uniform icing amounts of each section of the wire based on the scaling test, and selecting weights for simulating non-uniform icing weights;
m i ＝ρ ice πb ni (b ni +D)l i (1)
wherein: m is m i Ice coating mass (kg), b for each length of wire ni Ice thickness (mm), l for each length of wire i For each length (m), ρ of wire ice Is ice-coating density (kg/m) 3 ) D is the wire diameter (m).
Optionally, the ice-removing control device comprises a relay and an electromagnet; the electromagnets are fixed on the segmented leads of the ice supporting rail of the steel wire rope, each electromagnet is connected with the relay respectively, and the current of the electromagnet is controlled by programming the relay, so that the ice removing time sequence and the like are controlled, and different ice removing modes are simulated.
Optionally, the tension measurement system comprises a plurality of tension sensors and dynamic strain gauges; the tension sensor is connected in series with the end parts of all the wire ends of the steel wire rope, the dynamic strain gauge is in signal connection with the tension sensor, and the dynamic strain gauge is connected with the computer.
Optionally, the monocular image capturing and identifying system comprises a high-speed camera, a calibration plate, MATLAB software and a marker; and fixing a DIC mark point on the steel wire rope, shooting the movement of the mark point by using the high-speed camera, and analyzing in MATLAB software to obtain the displacement change in the deicing process, thereby obtaining the maximum ice jump height of the wire of the steel wire rope.
The invention has the positive beneficial effects that:
1) The device can develop the ice-removing jump fault research of the power transmission line aiming at the line model under microclimate and microtopography, has adjustable multiple parameters including line parameters, ice-covering working condition parameters and the like, and has wide application range.
2) The device provided by the invention can simulate the complex working condition of non-uniform icing/deicing of a real line, can be used for indoor construction, is convenient to install, and has the characteristics of strong operability and the like.
Drawings
Fig. 1 is a schematic structural diagram of a test apparatus for simulating non-uniform icing/de-icing of a power transmission line according to embodiment 1 of the present invention.
1. A wire rope; 2. a hanging string; 3. a fixed bracket; 4. a tension sensor; 5. a weight; 6. a high-speed camera; 7. a dynamic strain gauge; 8. a computer; 9. an electromagnet.
Detailed Description
The invention will be further described with reference to the following embodiments.
Example 1
As shown in FIG. 1, a test device for simulating nonuniform icing/deicing of a power transmission line comprises a wire scale model, a deicing control device, a tension measurement system and a monocular image pick-up identification system; the wire scaling model comprises a steel wire rope 1, a fixed bracket 3, a suspension string 2 and a suspension ring; two ends of the steel wire rope 1 are respectively hung on two side parts of the fixed support 3 through turnbuckle screws, a plurality of hanging strings 2 are uniformly fixed on the middle part of the steel wire rope 1, and each hanging string 2 is hung on the bottom of the fixed support 3 through the hanging ring; the bottom of the steel wire rope 1 is connected with a plurality of weights 5 with different weights, and the deicing control device is used for controlling the adsorption and falling of the weights 5; the tension measuring system is connected with the steel wire rope 1 and is used for measuring tension change of the steel wire rope 1; the monocular camera recognition system is used for monitoring the maximum ice jump height of the steel wire rope 1.
The wire rope 1 is used for simulating an outdoor power transmission wire, two ends of the wire rope 1 are respectively hung on two side parts of the fixed support 3 through turnbuckle screws, the wire rope is used for conveniently adjusting sag, the middle rail is hung on the fixed support 3 through a hanging ring, and the hanging ring can swing left and right. The device can develop the ice-removing jump fault research of the power transmission line aiming at the line model under microclimate and microtopography, has adjustable multiple parameters including line parameters, ice-covering working condition parameters and the like, and has wide application range. The device provided by the invention can simulate the complex working condition of non-uniform icing/deicing of a real line, can be used for indoor construction, is convenient to install, and has the characteristics of strong operability and the like.
Specifically, the diameter of the steel wire rope 1 is less than 1mm, and a balancing weight with specific mass is bound for meeting the reduction ratio. The steel wire rope 1 is segmented at equal intervals and is respectively marked as 1,2, … and i; with reference to fig. 1, the gear is divided into three sections, namely a first gear, a second gear and a third gear; according to the non-uniform icing form of a real line, determining a non-uniform icing form of a shrinkage test model, namely determining the icing thickness of each section of a non-uniform icing grade wire, determining the non-uniform icing quantity of each section of the non-uniform icing grade wire according to a formula (1), and then simulating the non-uniform icing quantity of each section of the wire based on the shrinkage test, and selecting weights 5 for simulating non-uniform icing weights;
m i ＝ρ ice πb ni (b ni +D)l i (1)
wherein: m is m i Ice coating mass (kg), b for each length of wire ni Ice thickness (mm), l for each length of wire i For each length (m), ρ of wire ice Is ice-coating density (kg/m) 3 ) D is the wire diameter (m).
Further, the ice-removing control device comprises a relay and an electromagnet 9; the electromagnets 9 are fixed on the sectional leads of the ice supporting rail of the steel wire rope 1 and are used for adsorbing weights 5 with certain mass, each electromagnet 9 is respectively connected with the relay, and the current of the electromagnet 9 is controlled by programming the relay, so that the ice removing time sequence and the like are controlled, and different ice removing forms are simulated.
The tension measuring system comprises a plurality of tension sensors 4 and dynamic strain gauges 7; the tension sensor 4 is connected in series with the end parts of the wire of each gear of the steel wire rope 1. The device is used for measuring the tension change condition of the steel wire rope 1 in the process of deicing before and after deicing, so as to obtain the maximum tension, unbalanced tension, deicing tension impact coefficient and the like of the wire.
The monocular camera recognition system comprises a high-speed camera 6, a calibration plate, MATLAB software and a marker; and a DIC mark point is fixed on the steel wire rope 1, a high-speed camera 6 is in signal connection with a computer 8, the high-speed camera 6 shoots the movement of the mark point, and then the movement is analyzed in MATLAB software to obtain the displacement change in the deicing process, so that the maximum ice jump height of the wire of the steel wire rope 1 is obtained.
Finally, it is noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and that other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (6)
1. The test device for simulating the nonuniform icing/deicing of the power transmission line is characterized by comprising a wire shrinkage model, a deicing control device, a tension measurement system and a monocular camera recognition system; the wire scaling model comprises a steel wire rope, a fixed bracket, a suspension string and a suspension ring; the two ends of the steel wire rope are respectively hung on the two side parts of the fixed support through turnbuckle screws, a plurality of hanging strings are uniformly fixed on the middle part of the steel wire rope, and each hanging string is hung on the bottom of the fixed support through the hanging ring; the bottom of the steel wire rope is connected with a plurality of weights with different weights, and the deicing control device is used for controlling the adsorption and falling of the weights; the tension measuring system is connected with the steel wire rope and is used for measuring tension change of the steel wire rope; the monocular camera recognition system is used for monitoring the maximum ice jump height of the steel wire rope.
2. The test device for simulating nonuniform icing/deicing of a power transmission line according to claim 1, wherein the diameter of the steel wire rope is less than 1mm, and a balancing weight is bound.
3. A test device for simulating non-uniform icing/de-icing of a power transmission line according to claim 1, wherein the wire ropes are equally spaced apart and marked as 1,2, …, i respectively; determining a non-uniform icing form of a scaling test model according to a non-uniform icing form of a real line, determining non-uniform icing amounts of each section of a non-uniform icing grade wire according to a formula (1), and then simulating the non-uniform icing amounts of each section of the wire based on the scaling test, and selecting weights for simulating non-uniform icing weights;
m i ＝ρ ice πb ni (b ni +D)l i (1)
wherein: m is m i Ice coating mass (kg), b for each length of wire ni Ice thickness (mm), l for each length of wire i For each length (m), ρ of wire ice Is ice-coating density (kg/m) 3 ) D is the wire diameter (m).
4. A test device for simulating non-uniform icing/de-icing of a power transmission line as claimed in claim 3, wherein said de-icing control means comprises a relay and an electromagnet; the electromagnets are fixed on the segmented leads of the ice supporting rail of the steel wire rope, each electromagnet is connected with the relay respectively, and the current of the electromagnet is controlled by programming the relay, so that the ice removing time sequence and the like are controlled, and different ice removing modes are simulated.
5. A test device for simulating non-uniform icing/de-icing of a power transmission line as claimed in claim 3, wherein said tension measurement system comprises a plurality of tension sensors and dynamic strain gauges; the tension sensor is connected in series with the end parts of all the wire ends of the steel wire rope, the dynamic strain gauge is in signal connection with the tension sensor, and the dynamic strain gauge is connected with the computer.
6. A test device for simulating non-uniform icing/de-icing of a power transmission line as claimed in claim 3, wherein said monocular camera recognition system comprises a high speed camera, a calibration plate, MATLAB software and a marker; and fixing a DIC mark point on the steel wire rope, shooting the movement of the mark point by using the high-speed camera, and analyzing in MATLAB software to obtain the displacement change in the deicing process, thereby obtaining the maximum ice jump height of the wire of the steel wire rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310314288.9A CN116343561A (en) | 2023-03-28 | 2023-03-28 | Test device for simulating non-uniform icing/deicing of power transmission line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310314288.9A CN116343561A (en) | 2023-03-28 | 2023-03-28 | Test device for simulating non-uniform icing/deicing of power transmission line |
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| CN116343561A true CN116343561A (en) | 2023-06-27 |
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| CN202310314288.9A Pending CN116343561A (en) | 2023-03-28 | 2023-03-28 | Test device for simulating non-uniform icing/deicing of power transmission line |
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- 2023-03-28 CN CN202310314288.9A patent/CN116343561A/en active Pending
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