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A protection device against wind and deflection flashover for transmission lines

A transmission line, flashover protection technology, applied in the field of power transmission and transformation, can solve the problems of accelerating the electrochemistry of insulating materials, accelerating insulation materials, moisture penetration, etc., to eliminate electrochemical corrosion aging, increase electrical insulation strength, and light weight Effect

Active Publication Date: 2016-05-25
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this method is that the insulating sheath in the device is directly exposed to the high field strength area formed by the wire burr, the tip, and the sharp corner area of ​​the connecting fitting, which will accelerate the aging of the insulating material under long-term action; in addition, the device does not It can ensure the tight fit between the conductive and the sheath, which will cause moisture to penetrate deeply and accelerate the electrochemical aging of the insulating material

Method used

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  • A protection device against wind and deflection flashover for transmission lines
  • A protection device against wind and deflection flashover for transmission lines
  • A protection device against wind and deflection flashover for transmission lines

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Embodiment Construction

[0025] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0026] see figure 1 , the invention proposes a transmission line anti-wind flashover protection device, including a wire protection device and a metal fitting protection device.

[0027] Wherein, the wire protection device includes a semi-conductive strip 5 , a water blocking strip 4 , an insulating sheath 3 , a stress cone 2 and a pressure equalizing ring 1 .

[0028] Wherein, the metal fitting protection device includes a water blocking strip 4 , a stress cone 2 and an insulating sheath box 9 .

[0029] The wire protection device is wrapped on the outside of the wire 6 and connected to the metal fitting protection device, and the metal fitting protection device is wrapped on the outside of the metal fitting 8 and connected to the transmission l...

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Abstract

The invention discloses a protection device for preventing windage yaw flashover of a power transmission line. The device comprises a wire, a fitting connected with the wire, a power transmission line insulator, a fitting protection device and two wire protection devices located on the two sides of the fitting. The wire protection devices are arranged outside the wire and connected with the fitting protection device, and the fitting protection device is installed outside the fitting and connected with the power transmission line insulator. Specific to air breakdown and discharge, the most direct reason for windage yaw flashover, generated due to the fact that the insulating distance between the wire and a tower is not enough due to strong wind, the electric insulating strength between the wire and the tower is enhanced. By the adoption of the protection device, electric field distortion between the wire and an insulating sheath and between the fitting and an insulating sheath box is effectively eliminated, and it is avoided that partial field strength is too high and the effect of preventing windage yaw flashover is greatly reduced; water is effectively prevented from entering the insulating sheath and the insulating sheath box, the probability of corona of the wire and the fitting is reduced, and the problem of electrochemical corrosion and aging of the device is solved.

Description

technical field [0001] The invention relates to a wind deflection flashover protection device for power transmission lines, which belongs to the technical field of power transmission and transformation. Background technique [0002] In recent years, with the gradual increase of various disastrous weathers, especially the emergence of extremely bad micro-meteorology such as squall line winds, wind deflection flashover problems of transmission lines have occurred from time to time. Lines where wind deflection flashover occurs include single and double circuit towers; tower types include tension towers and straight towers, tension towers are mostly concentrated in the discharge of jumper wires to the tower frame, and straight towers are mostly concentrated in wires or fittings to the tower arm discharge. When a wind-bias flashover occurs, there are often strong winds and heavy rain or hail in the occurrence area; there are obvious arc burn marks at the discharge point of the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/14H01B7/02H01B7/282
Inventor 陈杰周志成刘洋路永玲谢天喜高嵩
Owner STATE GRID CORP OF CHINA
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