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Overhead transmission line galloping suppression device

A technology for overhead transmission lines and suppression devices, applied in mechanical vibration attenuation devices, electrical digital data processing, instruments, etc., can solve problems such as wire galloping, line galloping, and long power lines, so as to ensure safe operation, flexible and reliable use , design reasonable effect

Pending Publication Date: 2020-07-31
国网甘肃省电力公司超高压公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Overhead power lines are exposed to the wild all year round, and are seriously affected by geographical location and environmental conditions. They are prone to icing or strong winds that cause conductors to dance. Large, it is easy to cause the line to dance and endanger the safe operation of the line
[0003] The existing technology often adopts the method of setting a heavy object pulling mechanism at both ends of the wire to increase the tension of the wire to suppress the sagging and galloping of the wire, but the length of the power line is generally large, and the use of the existing technology to install a heavy object pulling mechanism at both ends of the wire appears. is not enforceable

Method used

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  • Overhead transmission line galloping suppression device
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  • Overhead transmission line galloping suppression device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A certain 220kV transmission line adopts LGJ-185 / 30 type wire, the wire is steel-cored aluminum stranded wire, the steel core mainly bears the tension, the line is prone to galloping, and the method of the present invention is used to suppress galloping.

[0071] Combining the actual experience of line operation and consulting the relevant parameters of the line, we know: H 1 =35m, H 2 =7.5m, L 1 =6m, L 3 =8m, δ=125MPa, A=30mm².

[0072] According to the formula in step S2 and the formula in step S3 Calculated,

[0073] L 2 =35.51m, L 4 =28.64m;

[0074] According to the formula in step S6 and Calculated,

[0075] cos(α) = 0.96, cos(β)=0.99;

[0076] According to the formula in step S8 , and take the value of K as 2.4 to calculate,

[0077] G=4616N.

Embodiment 2

[0079] A 330kV transmission line adopts LGJ-300 / 40 type conductors, the conductors are steel-cored aluminum stranded wires, the steel core mainly bears the tension, and the line is prone to galloping, so the method of the present invention is adopted.

[0080] According to the actual experience of the line operation and consulting the relevant parameters of the line, it is known that: H 1 =39m, H 2 =7.5m, L 1 =9.3m, L 3 =10.5m, δ=110 MPa, A=40 mm².

[0081] According to the formula in step S2 and the formula in step S3 Calculated,

[0082] L 2 =40.09m, L 4 =33.20m;

[0083] According to the formula in step S6 and Calculated,

[0084]cos(α) = 0.95, cos(β)=0.97;

[0085] According to the formula in step S8 , and take the value of K as 2.4 to calculate,

[0086] G=5500N.

Embodiment 3

[0088] A 750kV transmission line adopts LGJ-400 / 50 type conductors, the conductors are steel-cored aluminum stranded wires, the steel core mainly bears the tension, and the line is prone to galloping, so the method of the present invention is adopted.

[0089] According to the actual experience of the line operation and consulting the relevant parameters of the line, it is known that: H 1 =48m, H 2 =7.5m, L 1 =12m, L 3 =11.4m, δ=110MPa, A=50mm².

[0090] According to the formula in step S2 and the formula in step S3 Calculated,

[0091] L 2 =49.48m, L 4 =43.07m;

[0092] According to the formula in step S6 and Calculated,

[0093] cos(α) = 0.96, cos(β)=0.97;

[0094] According to the formula in step S8 , and take the value of K as 2.4 to calculate,

[0095] G=6840N.

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Abstract

The invention relates to electric power protection equipment. The invention relates to an overhead transmission line galloping suppression device. The device comprises a wire, a supporting rod, a pulley assembly, a counterweight, a composite insulator, a main insulating rope and a load-bearing insulating rope; and the supporting rod is obliquely buried on the ground, fixed pulley arranged above movable pulley, the fixed pulley is connected to the supporting rod, the main insulating rope is wound on the wire, two ends of the main insulating rope are respectively connected with two composite insulators, one end of the load-bearing insulating rope is connected to the upper end of the movable pulley, and the other end of the load-bearing insulating rope is connected to the lower end of one ofthe composite insulators after passing around the fixed pulley and the movable pulley in turn, and the counterweight is connected to the lower end of the movable pulley. The overhead transmission linegalloping suppression device has the advantages of flexible and reliable use and reasonable design, galloping of lines can be inhibited by the aid of pulling modes, and safe operation of power transmission lines can be guaranteed. Moreover, no pulling devices need to be arranged at the two ends of the line, and the line can be pulled at any position of the power transmission line.

Description

technical field [0001] The invention relates to electric power protection equipment, in particular to an overhead power transmission line galloping suppression device. Background technique [0002] Overhead power lines are exposed to the wild all year round, and are seriously affected by geographical location and environmental conditions. They are prone to icing or strong winds that cause conductors to dance. Large, it is easy to cause the line to dance and endanger the safe operation of the line. [0003] The existing technology often adopts the method of setting a heavy object pulling mechanism at both ends of the wire to increase the tension of the wire to suppress the sagging and galloping of the wire, but the length of the power line is generally large, and the use of the existing technology to install a heavy object pulling mechanism at both ends of the wire appears. is not enforceable. Contents of the invention [0004] The object of the present invention is to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/14G06F30/20G06F119/14
CPCH02G7/14
Inventor 张海涛王胜利王文卓于鹏王辉张步勇王关霖王伟成保吕强焦小强任亚军南江郑晶晶马国强李宏涛李巍马周贵高强李扬易明星李永强杨健
Owner 国网甘肃省电力公司超高压公司
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