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Structure for preventing flashover of power transmission circuit by windage yaw

A technology of flashover structure and transmission line, applied in the direction of mechanical vibration damping device, etc., can solve the problems of increasing the vertical load of the insulator string, the actual effect is not ideal, etc., achieving good windproof effect, suppressing horizontal and torsional vibration, reducing wind off-trend effect

Inactive Publication Date: 2012-02-01
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to prevent the wind deflection flashover of the transmission line, it is often adopted to install a weight under the suspension line clamp of the straight line tower or other methods to increase the vertical load of the insulator string. In essence, the galloping or torsional swing of the wire that causes the wind deflection is not suppressed from the source. The effect is not ideal

Method used

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  • Structure for preventing flashover of power transmission circuit by windage yaw
  • Structure for preventing flashover of power transmission circuit by windage yaw
  • Structure for preventing flashover of power transmission circuit by windage yaw

Examples

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Effect test

Embodiment 1

[0032] figure 1 It is a schematic structural diagram of Embodiment 1 of a method for preventing wind-deviation flashover of a transmission line according to the present invention.

[0033] Such as figure 1 As shown, damping spacers 4 and 5 are installed and fixed on the wires 2 and 3 with a distance of 500mm on the left and right sides of the suspension insulator string 1, and the left and right clamps 6, 7 are respectively installed on the left and right wires 2.0m away from the suspension insulator string. Above, there is a damping system between the wires on both sides of the suspension insulator string, or on the wires on both sides, that is, a damper system 8 is provided between the left and right clamps, and the damping system is hinged with the left and right clamps through the tie rods 9 Connection; the end fittings of the suspension insulator string 1 are provided with a "T"-shaped end 10, and the "T"-shaped end 10 is provided with a bolt hole 12 for connecting with the c...

Embodiment 2

[0038] figure 2 It is a schematic structural diagram of the second embodiment of the method for preventing wind-deviation flashover of a transmission line according to the present invention.

[0039] The non-damping spacers 4 and 5 are respectively fixed on the wires 2 and 3 with a distance of 800mm between the left and right sides of the suspension insulator string 1, and the left and right clamps 6, 7 are respectively installed on the left and right wires 2 with a distance of 2.5m from the suspension insulator string 1. 3. The damping system 8 is hinged to the left and right clamps 5 and 6 through the tie rod 9. The end fittings of the insulator string 9 are provided with a "T" shaped end 10, and the "T" shaped end 10 is used to connect with the iron tower cross arm 11 的bolt hole 12.

[0040] The damping system is a composite damping system composed of 3 spring dampers in series and parallel with the air damper, as attached Figure 7 Shown.

[0041] The structure of the left and r...

Embodiment 3

[0043] image 3 It is a schematic structural diagram of Embodiment 3 of the method for preventing wind-deviation flashover of a transmission line according to the present invention.

[0044] On the wires 1 and 2 on the left and right sides of the suspension insulator string 1, two pairs of damping systems composed of clamps 5, 6 and a damping system 8 are respectively fixed, and the two pairs of damping systems are separated by 2.5 m.

[0045] The damping system is a viscoelastic damper, air damper or spring damper, such as Figure 8-10 , Or a composite damping system composed of them side by side.

[0046] The end structures of the clamps 5 and 6 and the insulator string are the same as in the first embodiment.

[0047] The spacers 4, 5, wire clamps 6, 7 and the "T"-shaped end 10 of the end fittings of the insulator string described in the first to third examples above can all be manufactured by general machining methods or casting methods. Various dampers It can also be manufacture...

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Abstract

The invention provides a structure for preventing flashover of a power transmission circuit caused by windage yaw. The method is characterized in that: insulating bars (4, 5) and wire clips (6, 7) are arranged on conductors (2, 3) on the left and right of a suspension string (1) respectively; a damping system (8) is arranged between the wire clips (6, 7), and is hinged with the wire clips (6, 7) through a pull rod (9) for absorbing the vibration energy of the conductors on two sides, so that the aim of inhibiting horizontal and torsional vibration of the conductors is achieved; and a T-shaped tip (10) is arranged on the hardware at the end of the suspension string (1), and is provided with a bolt hole (12) which is used for connecting a tower crossarm (11) to enlarge the contact surface of connection, so that the suspension string and the tower crossarm are connected stably, and the toque is reduced. According to the structure, the vibration energy of the conductors can be effectively absorbed, the torque generated by galloping of the conductors to the end of the suspension string is effectively reduced, and the windage yaw trend of the suspension string is reduced. The structure has the advantages of simple structure, low cost, long service life, good windage yaw prevention effect and easiness in realization, and is suitable for the requirement of windage yaw prevention of the suspension string of a tangent tower of an overhead power transmission circuit.

Description

Technical field [0001] The invention relates to a structure for preventing wind-deflection flashover of a transmission line, in particular to a wind-deflection flashover method for preventing a linear tower suspension insulator string, belonging to the technical field of electric power overhead transmission line protection. Background technique [0002] In recent years, there has been a significant increase in wind-deflection flashover accidents on transmission lines caused by strong storms. Usually, it is difficult to reclose successfully after wind-deflection flashover, which has caused serious harm to the safe and stable operation of the power grid, and the occurrence of wind deviation is often accompanied by There are strong winds and thunderstorms, which bring great difficulties to the judgment and search of faults. [0003] Wind skew flashover is the reduction of the space gap distance between the conductors and the tower on the transmission line under various adverse externa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/14
Inventor 李鹏云张峰
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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