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A high-voltage transmission line anti-flashover device

A technology for high-voltage transmission lines and high-voltage transmission lines, which is applied in the direction of cable suspension devices, cable installations, and mechanical vibration attenuation devices. Achieve the effects of easy replacement and maintenance, improved service life and simple structure

Active Publication Date: 2020-12-08
马鞍山圣德力智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the increase of the voltage level of the power grid and the increase of the coverage area, the potential safety hazards of line operation are also greater, and long-distance transmission lines are easily affected by lateral wind loads.
Due to the low gravity of the high-voltage transmission line itself, it is easy to swing with the strong wind when it is subjected to strong wind, and it is easy to reduce the distance between the live wire and the tower
When the distance is too small, the live wires will discharge to the tower structure, making the high-voltage transmission line prone to unstable power transmission, wind deflection tripping, etc.

Method used

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  • A high-voltage transmission line anti-flashover device
  • A high-voltage transmission line anti-flashover device
  • A high-voltage transmission line anti-flashover device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0057] The principle of Example 1 is: shrink the length of the high-voltage transmission line between any two towers through the anti-flashover mechanism, so that it tends to be straight, that is, the length of the high-voltage transmission line tends to be equal to the distance between any two towers ; In addition, control the spacing between the high-voltage transmission line and the insulator string that shrinks to the insulator string, so that it is far away from the insulator string (that is, the tower pole in the actual state) to avoid its flashover due to the short distance.

[0058] The core idea of ​​the realization of its mechanical structure is that when the high-voltage transmission line is pulled by the wind, the friction surface is driven to continuously rub the shape memory alloy sheet with the first length to generate heat, and after repeated friction to a certain extent (the heat generated by the friction It can be calculated by thermodynamic formulas. Differen...

Embodiment 1

[0060] The basic structure is expressed as: a high-voltage transmission line anti-flashover device, which is used to overcome the swing of the high-voltage transmission line caused by the influence of wind force on the high-voltage transmission line under the condition of strong wind.

[0061] The technical solution of this embodiment is to set an anti-flashover mechanism at the end of the high-voltage transmission line insulator string, such as image 3 include,

[0062] Rotating arm one 31, supporting rod assembly and rotating arm two 32 are arranged on a fan-shaped surface with the end of the insulator string as the center of the circle, and the high-voltage transmission line passes through rotating arm one 31, supporting rod assembly and rotating arm two 32 away from the insulator The end of the string extends to both sides of the tower pole; under the action of wind, the high-voltage transmission line can drive the first rotating arm and the second rotating arm to rotate ...

Embodiment 2

[0079] The basic structure is expressed as: a high-voltage transmission line anti-flashover device, which is used to overcome the swing of the high-voltage transmission line caused by the influence of wind force on the high-voltage transmission line under the condition of strong wind.

[0080] The technical solution of the present application is to set an anti-flashover mechanism at the end of the high-voltage transmission line insulator string, such as Figure 4 shown, including,

[0081] Rotating arm one 41, supporting rod assembly and rotating arm two 42 are arranged on the parallel fan-shaped surface with the end of the insulator string as the center of the circle, and the high-voltage transmission line passes through rotating arm one 41, supporting rod assembly and rotating arm two 42 away The end of the insulator string extends to the two sides of the tower; under the action of wind, the high-voltage transmission line can drive the first rotating arm and the second rotat...

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Abstract

The invention belongs to the field of high-voltage power transmission, and relates to a high-voltage power transmission line anti-flashover device which comprises an anti-flashover mechanism arrangedat the end of an insulator string. The anti-flashover mechanism comprises a first rotating arm, wherein one end of the first rotating arm can rotate around the end of the insulator string under the action of wind power and is provided with a first friction panel, and the other end is connected with a high-voltage transmission line; a second rotating arm, wherein one end of the second rotating armcan rotate around the end of the insulator string under the action of wind power and is provided with a second friction panel, and the other end is connected with the high-voltage transmission line; asupporting rod assembly which is fixed at the end of the insulator string and is provided with a supporting part and a friction heating part made of SMA material; and the friction heating part whichis connected to the supporting part. According to the device, the length of the high-voltage power transmission line between any two adjacent tower poles is adjusted mainly by utilizing the deformation control supporting part made of the SMA material in the friction heat generation process.

Description

technical field [0001] The invention belongs to the field of high-voltage power transmission, and relates to a high-voltage power transmission line anti-flashover device. Background technique [0002] UHV lines refer to transmission lines with AC voltage levels of 1,000 kV and above and DC plus or minus 800 kV and above. Its power transmission capacity is five times that of 500 kV EHV lines, and it is known as the "electric highway". Compared with ordinary high-voltage transmission lines, its transmission distance is long, line loss is low, and land occupation is small, which is of great significance for improving economic efficiency and promoting the development of clean energy. [0003] However, with the increase of grid voltage level and coverage area, the potential safety hazards of line operation are also increasing, and long-distance transmission lines are easily affected by lateral wind loads. Due to the low gravity of the high-voltage transmission line itself, it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G13/00H02G7/14H02G7/08
CPCH02G7/08H02G7/14H02G13/80
Inventor 胡福文
Owner 马鞍山圣德力智能科技有限公司
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