CN116345378A - Transmission line galloping suppression device and method based on emergency inhaul cable - Google Patents
Transmission line galloping suppression device and method based on emergency inhaul cable Download PDFInfo
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- CN116345378A CN116345378A CN202111681286.0A CN202111681286A CN116345378A CN 116345378 A CN116345378 A CN 116345378A CN 202111681286 A CN202111681286 A CN 202111681286A CN 116345378 A CN116345378 A CN 116345378A
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- galloping
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- inhaul cable
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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
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
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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
- H02G7/12—Devices for maintaining distance between parallel conductors, e.g. spacer
- H02G7/125—Damping spacers
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- Suspension Of Electric Lines Or Cables (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention belongs to the technical field of anti-galloping of a power transmission line, and particularly relates to a power transmission line galloping suppression device and a power transmission line galloping suppression method based on emergency inhaul cables. The emergency treatment of the galloping of the overhead transmission line can be realized, and the purpose of disaster prevention and control in the occurrence process of the galloping of the line is realized.
Description
Technical Field
The invention belongs to the technical field of anti-galloping of a power transmission line, and particularly relates to a power transmission line galloping suppression device and method based on an emergency inhaul cable.
Background
Statistical analysis data of overhead transmission line operation accidents show that the line galloping problem is one of the most important factors for threatening the line safety currently. At present, the anti-galloping design and treatment of the power transmission line mainly depend on galloping distribution diagrams and galloping grade division. In practice, there is a situation that serious galloping occurs in a low-risk galloping zone, and once a large-area long-time galloping disaster occurs, a large number of line hardware fittings, guide/ground wires, towers and the like are seriously damaged, so that the safe operation of a power grid is seriously influenced. In addition, due to limitations of existing galloping control technologies, galloping risks still exist in lines with galloping prevention measures installed under extremely severe weather conditions, and attention to such risks is also needed in the operation and maintenance of power transmission lines. At present, the technical measures of anti-galloping mainly pay attention to how to reduce the occurrence probability of galloping and the galloping amplitude in advance. In the actual operation and maintenance process, the method and the strategy lack effective emergency treatment methods and strategies except for strengthening observation in the face of line galloping. With increasingly complex meteorological environments and increased dense channels of lines, research on disaster emergency treatment methods after line galloping is needed, safe and rapid response of emergency states is achieved, and power grid hazards caused by long-time galloping are avoided.
In recent years, research at home and abroad has a certain research foundation in aspects of galloping mechanism, true test, research and development and application of a galloping prevention device, and a plurality of galloping prevention and control devices such as phase spacers, phase-to-ground spacers, damping spacers and the like have been developed and successfully applied. The inter-phase spacers are disposed between adjacent wires, but are not effective in inhibiting contemporaneous galloping of the adjacent wires. In addition, researches have been proposed to add phase-to-ground spacers on the lines with serious galloping disasters, so that the synchronous galloping and different-period galloping treatment effects of the power transmission lines can be effectively improved. However, the above research results and devices are mostly aimed at precautions in advance, and lack corresponding technical research and equipment research and development for emergency anti-galloping measures during and after galloping.
The Chinese patent document with the bulletin number of CN103441462B discloses a sectional combined type anti-galloping composite phase-earth spacing rod, which comprises an adjustable spacing rod, an adjusting plate and a stay wire, wherein the adjustable spacing rod comprises an upper rod body, a lower rod body and a middle rod connected between the upper rod body and the lower rod body, the upper end of the upper rod body is connected with a connecting fitting, the lower end of the lower rod body is connected with the adjusting plate, the outer circumferences of the upper rod body and the lower rod body are both connected with an insulating umbrella skirt, the upper side of the insulating umbrella skirt of the upper rod body is connected with an end accessory, and the lower side of the insulating umbrella skirt of the lower rod body is also connected with an end accessory; the lower end of the upper rod body and the upper end of the lower rod body are connected with an end accessory, and the two ends of the stay wire are respectively connected with an adjusting plate and the ground. However, the phase-to-ground spacer is a precaution measure before the occurrence of the galloping of the overhead transmission line, and the on-site rapid emergency treatment cannot be carried out aiming at the disasters in the occurrence process of the galloping of the line.
Disclosure of Invention
The invention aims to provide a transmission line galloping suppression device and method based on an emergency inhaul cable, aiming at the problems in the prior art, and the device and method can realize emergency treatment of the galloping of an overhead transmission line and realize the purpose of disaster prevention in the process of generating the galloping of the line.
The technical scheme of the invention is as follows:
the utility model provides a transmission line galloping suppression device based on emergent cable, sets up on the transmission line wire, including setting up the emergent cable on the transmission line wire, emergent cable extend to ground department for first anchor point towards keeping away from the wire direction downwards, emergent cable from first anchor point towards keeping away from wire direction horizontal extension to second anchor point, first anchor point department set up the fixed pulley, the fixed pulley be connected with first anchor point through anti-impact device, second anchor point department fixedly be provided with one-way tightening means, emergent cable pass the fixed pulley and be connected with one-way tightening means.
Specifically, the first anchoring point is positioned below the wire and is laterally deviated from the wire by 5-10 m.
Specifically, the second anchoring point is 20-50m away from the lower part of the transmission line wire.
Specifically, be provided with a plurality of conductor spacers on the wire, spacing A the conductor spacer on connect emergent cable, emergent cable mounting point is in the antinode department of galloping half wave.
Specifically, a tension sensor is also connected in series on the emergency inhaul cable between the fixed pulley and the unidirectional tightening device.
Specifically, the anti-impact device is a spring, and the tensile capacity of the anti-impact device is more than or equal to 30kN.
Specifically, the unidirectional tightening device is a lever block or a manual winch, and the tensile capacity is more than or equal to 30kN.
Specifically, the fixing mode of the first anchoring point and the second anchoring point is any one of a rotary ground anchor, an earth-penetrating anchor nail or a rotary ground pile.
A method of suppressing dance using an emergency cable based transmission line dance-suppression apparatus according to any one of claims 1-7, comprising the steps of:
s1, determining the installation position of a galloping suppression device according to waveform characteristics of an overhead transmission line during galloping, wherein the operation position is selected at an antinode of a line galloping half-wave, and an emergency inhaul cable is connected to a transmission line guide wire of a selected installation point;
s2, the emergency inhaul cable is horizontally extended to the position below one side far away from the wire after being turned through the fixed pulley through the first anchoring point, the tail end of the emergency inhaul cable is gradually tightened through the one-way tightening device, rebound in the tightening process of the emergency inhaul cable is prevented, and the one-way tightening device is fixed to the second anchoring point to finish installation.
Specifically, in order to prevent the operation surface from inducing electricity to hurt people before installing the galloping suppression device, reliable grounding operation needs to be performed on the line operation section, a guiding rope is projected to span a conducting wire by adopting an air pressure projection device, and then a grounding wire is reversely replaced by the guiding rope, one end of the grounding wire is connected with a grounding claw, the other end of the grounding wire is connected with a grounding point, and the grounding wire is gradually tightened, so that the grounding claw is clamped on the conducting wire, and reliable grounding of the power transmission line is realized.
The beneficial effects of the invention are as follows: the transmission line galloping suppression device based on the emergency inhaul cable is used for connecting the emergency inhaul cable with a transmission line wire, and then a first formulated anchoring point is changed from vertical to horizontal traction through a fixed pulley and horizontally extends to a second anchoring point selected below a side far away from the wire, so that the operation safety is ensured; a spring anti-impact device is added between the first anchoring point and the fixed pulley, so that the emergency inhaul cable impact force caused by wire galloping in the operation process is prevented; the one-way tightening device is adopted to gradually tighten, so that rebound in the tightening process of the emergency inhaul cable is prevented. The transmission line galloping suppression device based on the emergency inhaul cable can realize emergency treatment of the galloping of the overhead transmission line, complement and perfect the existing transmission line galloping control technology and method, and realize disaster control in the occurrence process of the line galloping.
According to the invention, under the condition that the conductor of the transmission line is provided with the spacing bars, the spacing bars with proper distances are connected with the emergency inhaul cable, so that the abrasion of the conductor by the emergency inhaul cable is prevented. The tension sensor is also connected in series with the emergency guy cable between the fixed pulley and the unidirectional tightening device to monitor the guy cable tension, so that the guy cable tension monitoring requirements of the transmission lines with different voltage levels during emergency stop dancing are met, and the transmission lines are prevented from being damaged due to overlarge emergency guy cable tension.
Drawings
Fig. 1 is a schematic structural diagram of a transmission line galloping suppression device based on an emergency cable according to embodiment 1;
fig. 2 is a schematic structural diagram of a transmission line galloping suppression device based on an emergency cable according to embodiment 2.
1 wire, 2 spacing bars, 3 emergency guy wires, 4 fixed pulleys, 5 anti-impact devices, 6 first anchor points, 7 tension sensors, 8 unidirectional tightening devices and 9 second anchor points.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and the specific embodiments.
Example 1
As shown in fig. 1, the structural schematic diagram of a power transmission line galloping suppression device based on an emergency cable is provided in this embodiment, the device is arranged on a power transmission line conductor 1 and needs to be used for suppressing galloping, the device comprises an emergency cable 3 arranged on the power transmission line conductor 1, the emergency cable 3 extends downwards to a first anchoring point 6 far away from the conductor 1 direction to the ground, the emergency cable 3 horizontally extends to a second anchoring point 9 far away from the conductor 1 direction from the first anchoring point 6, a fixed pulley 4 is arranged at the first anchoring point 6, the fixed pulley 4 is connected with the first anchoring point 6 through an anti-collision device 5, a unidirectional tightening device 8 is fixedly arranged at the second anchoring point 9, and the emergency cable 3 passes through the fixed pulley 4 and is connected with the unidirectional tightening device 8. And a tension sensor 7 is also connected in series with the emergency guy rope 3 between the fixed pulley 4 and the unidirectional tightening device 8.
The anti-impact device 5 is a spring, and can prevent the impact force of an emergency inhaul cable caused by the waving of a wire in the operation process, and can be formed by connecting a plurality of springs in parallel, so that the anti-impact capability requirement of the transmission line with different voltage grades in an emergency anti-waving way is met, and the tensile capability of the anti-impact device is more than or equal to 30kN.
The unidirectional tightening device 8 is a lever block or a manual winch, is convenient to tighten the lead 1, and has the tensile capacity of more than or equal to 30kN in order to meet the tightening requirements of the inhaul cable when the transmission lines with different voltage levels are in emergency stop dancing.
In this embodiment, the fixing manner of the first anchor point 6 and the second anchor point 9 is any one of a rotary ground anchor, an earth-penetrating anchor or a rotary ground pile, so that quick construction can be realized.
The method for suppressing the dance by using the transmission line dance suppression device based on the emergency inhaul cable comprises the following steps of:
s1, determining the installation position of a galloping suppression device according to the waveform characteristics of an overhead transmission line during galloping, wherein the operation position is selected at an antinode of a line galloping half wave, and if necessary, in order to prevent the operation surface from inducing injury to people before the galloping suppression device is installed, reliable grounding operation is required to be carried out on a line operation section, a guide rope is projected to span a wire by adopting an air pressure projection device, and then the guide rope is adopted to reversely replace a grounding wire, one end of the grounding wire is connected with a grounding claw, the other end of the grounding wire is connected with a grounding point, and the grounding wire is gradually tightened, so that the grounding claw is clamped on the wire, and reliable grounding of the transmission line is realized; the grounding claw is additionally connected with an auxiliary rope, after working is completed, the grounding claw can be separated from the power transmission line by pulling the auxiliary rope, the grounding wire can be detached without climbing a tower, and the state of the line is recovered; then, connecting a guide rope with an emergency guy cable 3 by adopting an air pressure casting device and casting a crossing wire to accurately connect the emergency guy cable 3 to a power transmission line wire 1 of a selected mounting point, and simultaneously selecting two anchoring points, wherein a first anchoring point 6 is positioned at a position which is laterally deviated from the wire by 5-10m and is right below a traction point, so as to prevent the risk of deicing and hurting people above the line in the construction process, a second anchoring point 9 extends to a position 20-50m away from the line from a line by a first anchoring point 6 in a vertical line, and the anchoring points can adopt rotary ground anchors, and the drilling depth is not less than 1m; for 110kV lines, a single rotary ground anchor can be adopted, for 220kV lines, the single anchoring point should be not less than 2 rotary ground anchors, and for 500kV lines, the single anchoring point should be not less than 4 rotary ground anchors;
s2, the emergency inhaul cable 3 is horizontally extended to the position below one side far away from the wire after being turned through the fixed pulley 4 through the first anchoring point 6, the tail end of the emergency inhaul cable 3 is gradually tightened through the one-way tightening device 8, rebound in the tightening process of the emergency inhaul cable 3 is prevented, and the one-way tightening device 8 is fixed to the second anchoring point 9 to finish installation.
The emergency inhaul cable 3 between the fixed pulley 4 and the unidirectional tightening device 8 is also connected with a tension sensor 7 in series to monitor the tension of the emergency inhaul cable in real time, and the tension sensor can monitor the tension of the insulating rope in real time to prevent the damage of the galloping restraining device or the damage of the wire fitting of the transmission line caused by the overlarge tension of the emergency inhaul cable.
Example 2
In this implementation, the condition of using is be provided with a plurality of conductor bars 2 on 1, the interval a spacing the conductor bars 2 on connect emergent cable 3, emergent cable 3 mounting point is in the antinode department of galloping half wave. The emergency inhaul cables 3 are connected to the proper spacing rods at a certain spacing A, so that different emergency inhaul cables 3 are arranged at a certain distance, and in addition, the installation point of each emergency inhaul cable 3 is selected at the antinode of the galloping half wave: if the galloping in the first gear of the line is a single half wave, the emergency inhaul cable is arranged on the spacing rod 2 at the middle position of the gear; if the galloping in the first gear of the line is a double half wave, the emergency guy cable 3 is installed on the spacer bars at the 1/4 and 3/4 gear positions, and two sets of the galloping suppression devices are used, as shown in fig. 2.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (10)
1. The utility model provides a transmission line galloping suppression device based on emergent cable, sets up on transmission line wire (1), its characterized in that, including setting up emergent cable (3) on transmission line wire (1), emergent cable (3) down towards keeping away from wire (1) direction extension to ground department be first anchor point (6), emergent cable (3) from first anchor point (6) towards keeping away from wire (1) direction horizontal extension to second anchor point (9), first anchor point (6) department set up fixed pulley (4), fixed pulley (4) be connected with first anchor point (6) through protection against shock device (5), second anchor point (9) department fixedly be provided with unidirectional tightening device (8), emergent cable (3) pass fixed pulley (4) and be connected with unidirectional tightening device (8).
2. The transmission line galloping suppression device based on the emergency inhaul cable according to claim 1, wherein the first anchor point is located at a position which is laterally deviated from the wire (1) by 5-10m below the wire (1).
3. The transmission line galloping suppression device based on the emergency cable according to claim 2, wherein the second anchoring point (9) is located at a distance of 20-50m from just below the transmission line conductor (1).
4. The transmission line galloping suppression device based on the emergency inhaul cable according to claim 1, wherein a plurality of spacing rods (2) are arranged on the lead (1), the spacing rods (2) with a certain spacing A are connected with the emergency inhaul cable (3), and mounting points of the emergency inhaul cable (3) are arranged at antinodes of galloping half waves.
5. The transmission line galloping suppression device based on the emergency inhaul cable according to claim 4, wherein a tension sensor (7) is further connected in series with the emergency inhaul cable (3) between the fixed pulley (4) and the unidirectional tightening device (8).
6. The transmission line galloping suppression device based on the emergency inhaul cable according to claim 1, wherein the anti-impact device (5) is a spring, and the tensile capacity of the anti-impact device is more than or equal to 30kN.
7. The transmission line galloping suppression device based on the emergency inhaul cable according to claim 1, wherein the unidirectional tightening device (8) is a lever block or a manual winch, and the tensile capacity is more than or equal to 30kN.
8. The transmission line galloping suppression device based on the emergency inhaul cable according to claim 1, wherein the first anchor point (6) and the second anchor point anchor (9) are fixed in any one of a rotary ground anchor, a ground-engaging anchor and a rotary ground pile.
9. Method for suppressing dance using an emergency cable based transmission line dance-suppression device according to any of the preceding claims 1-8, comprising the steps of:
s1, determining the installation position of a galloping suppression device according to waveform characteristics of an overhead transmission line during galloping, wherein the operation position is selected at an antinode of a line galloping half wave, and connecting an emergency inhaul cable (3) to a transmission line lead (1) of a selected installation point;
s2, the emergency inhaul cable (3) is turned through the fixed pulley (4) and then horizontally extends to the position below one side far away from the wire, the tail end of the emergency inhaul cable (3) is gradually tightened through the one-way tightening device (8), rebound in the tightening process of the emergency inhaul cable (3) is prevented, and the one-way tightening device (8) is fixed to the second anchoring point (9) to finish installation.
10. The method for suppressing the galloping of the transmission line galloping suppression device based on the emergency inhaul cable according to claim 9, wherein in order to prevent the operation surface from inducing injury of people before the galloping suppression device is installed, reliable grounding operation is required to be performed on the line operation section, a guiding rope is projected to span a wire by adopting an air pressure projection device, and then a grounding wire is reversely replaced by adopting the guiding rope, one end of the grounding wire is connected with a grounding claw, the other end of the grounding wire is connected with a grounding point, and the grounding wire is gradually tightened, so that the grounding claw is clamped on the wire, and reliable grounding of the transmission line is realized.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021108453546 | 2021-07-26 | ||
| CN202110845354.6A CN113346436A (en) | 2021-07-26 | 2021-07-26 | Power transmission line galloping restraining device and method based on emergency stay cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116345378A true CN116345378A (en) | 2023-06-27 |
Family
ID=77480308
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110845354.6A Withdrawn CN113346436A (en) | 2021-07-26 | 2021-07-26 | Power transmission line galloping restraining device and method based on emergency stay cable |
| CN202111681286.0A Pending CN116345378A (en) | 2021-07-26 | 2021-12-31 | Transmission line galloping suppression device and method based on emergency inhaul cable |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110845354.6A Withdrawn CN113346436A (en) | 2021-07-26 | 2021-07-26 | Power transmission line galloping restraining device and method based on emergency stay cable |
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| Country | Link |
|---|---|
| CN (2) | CN113346436A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113872136B (en) * | 2021-09-29 | 2023-05-16 | 国网河南省电力公司电力科学研究院 | Cable throwing device for emergency anti-galloping of power transmission line |
| CN114243611B (en) * | 2021-12-31 | 2024-05-24 | 国网河南省电力公司电力科学研究院 | Emergency anti-galloping control device for power transmission line |
| CN114336484B (en) * | 2021-12-31 | 2024-05-24 | 国网河南省电力公司电力科学研究院 | Emergency anti-galloping sliding-rolling hanging rope belt |
-
2021
- 2021-07-26 CN CN202110845354.6A patent/CN113346436A/en not_active Withdrawn
- 2021-12-31 CN CN202111681286.0A patent/CN116345378A/en active Pending
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| Publication number | Publication date |
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| CN113346436A (en) | 2021-09-03 |
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