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Up-carrying type suspension V-shaped insulator string

A technology of insulator strings and composite insulators, applied in the direction of suspension/strain insulators, insulators, electrical components, etc., can solve problems such as troublesome operation and maintenance of high-voltage transmission lines, difficulty in quickly judging the location of faults, hazards to life and production, etc., to achieve Improve economy and power supply reliability, avoid large-scale power outage accidents, and prevent wind deflection flashover

Pending Publication Date: 2020-09-04
SOUTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the insulator strings are not only affected by the large height difference in the mountains and the uneven force of the large and small gears, but also by the strong wind. The insulator strings swing sharply, and the chances of wind flashover and string drop are greatly increased.
Once such a situation occurs, it will cause a large-scale blackout accident, which will bring great harm to the people's life and production, and bring great economic losses to the country.
Moreover, after an accident, it is difficult to accurately and quickly determine the location of the fault, which also brings great trouble to the operation and maintenance of high-voltage transmission lines.

Method used

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  • Up-carrying type suspension V-shaped insulator string
  • Up-carrying type suspension V-shaped insulator string

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 , figure 2 As shown in the figure, an upward-carrying suspension V-shaped insulator string includes two sets of insulator series connection structures and an upward-carrying suspension connecting plate. One end is connected to the iron tower cross arm to form a V-shaped insulator string. The insulator series connection structure includes an L-shaped large voltage equalizing ring 2 , a composite insulator string 3 and a small voltage equalizing ring 4 .

[0021] Specifically, in this embodiment, the upward-carrying suspension V-shaped insulator strings, from bottom to top, sequentially include the upward-carrying suspension connecting plate 1, the L-shaped large voltage equalizing ring 2, the composite insulator string 3, the small voltage equalizing ring 4, and the iron tower Cross arm 5.

[0022] The upward hanging suspension link plate 1 is connected to the composite insulator string 3, the L-shaped large voltage equalizing ring 2 is connected to ...

Embodiment 2

[0025] On the basis of Example 1, the L-shaped large voltage equalizing ring 2 is connected to the lower side of the composite insulator string 3, the small voltage equalizing ring 4 is connected to the upper part of the composite insulator string 3, and the two ends of the composite insulator string 3 They are respectively connected with the iron tower cross arm 5 and the suspension connecting plate 1. . In this embodiment, the L-shaped large grading ring 2 , small grading ring 4 and the composite insulator string 3 are connected by bolts, which are used to increase the capacitance of the composite insulator string 3 pairs of wires and improve voltage distribution. There is an acute angle α between the lower part of the L-shaped large voltage equalizing ring 2 and the vertical direction of the composite insulator string 3. Compared with the conventional V string, this application adds that the L-shaped large voltage equalizing ring is bent downward After angle α, the clearan...

Embodiment 3

[0028] On the basis of Example 2, the composite insulator string 3 is connected to the iron tower cross arm 5 through fittings such as the DB adjustment plate 6 and the PT adjustment plate 7, which can facilitate the adjustment of the length of the fittings string and the angle with the V string according to the actual situation. , to adapt to the electrical clearance of tower windows in different tower types and different working conditions.

[0029] Therefore, the application is suitable for straight line iron towers of transmission lines in mountainous areas and windy areas, to prevent wind-bias flashover and string drop of overhead transmission lines, avoid large-scale power outages, and improve the economics of power grid construction and power supply reliability.

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PUM

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Abstract

The invention provides an up-carrying type suspension V-shaped insulator string which comprises two sets of insulator string connecting structures and an up-carrying type suspension yoke plate. One ends of the two sets of insulator string connecting structures are connected to the two sides of the up-carrying type suspension yoke plate respectively, and the other ends of the two sets of insulatorstring connecting structures are connected to an iron tower cross arm to form the V-shaped insulator string. Compared with a conventional suspension V string, after the up-carrying type suspension yoke plate is additionally arranged, an electrical gap circle below the V string is upwards improved and shortened, and the electrical gap circle on the side face of a tower window is improved through anL-shaped large grading ring, so that the size of the tower window of the iron tower can be reduced, and the weight of the iron tower is reduced. And meanwhile, the yoke plate is lifted, so that the yoke plate is relatively flattened, the moment of force of a wire to an insulator hardware string during windage yaw is reduced, and the stress of the insulator hardware string is improved. Therefore,the up-carrying type suspension V-shaped insulator string is suitable for the power transmission line iron towers in mountainous regions and gale regions, prevents the windage yaw flashover and stringfalling of the overhead power transmission line, avoids the large-area power failure accidents, and improves the economy of power grid construction and the reliability of power supply.

Description

technical field [0001] The present invention relates to the field of electric power design, in particular to a V-series insulator string suspended from an overhead power transmission line iron tower, specifically an insulator string suitable for various areas, especially mountainous areas and windy areas, effectively reducing the size of phase tower windows in iron towers and improving the fittings string Stressed structure. Background technique [0002] With the in-depth development of power grid construction, more and more overhead transmission lines pass through areas with harsh conditions, such as mountainous areas and windy areas, making the cost of transmission lines higher and higher. Moreover, the insulator strings are not only affected by the large height difference in the mountains and the uneven force of the large and small gears, but also by the strong wind. The insulator strings swing sharply, and the chances of wind flashover and string drop are greatly increas...

Claims

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Application Information

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IPC IPC(8): H01B17/04H01B17/06H01B17/08H01B17/38H01B17/42H02G7/00
CPCH01B17/04H01B17/06H01B17/08H01B17/38H01B17/42H02G7/00
Inventor 梁明马海木呷唐祎俊李力黎亮刘炯刘翰柱周唯李澄宇魏德军莫礼曦罗琦戴严航
Owner SOUTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP CORP