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Half-V-shaped suspension string for preventing windage yaw

A technology for preventing wind deflection and hanging strings, applied in the installation of electrical components, cables, overhead installation, etc., can solve the problems of troublesome operation and maintenance of high-voltage transmission lines, low recombination power of the transmission network, and difficulty in quickly judging faults, etc. Avoid large-scale power outages, improve power supply reliability, and reduce size

Pending Publication Date: 2020-03-24
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

[0002] More and more overhead transmission lines pass through areas with harsh conditions. They are not only attacked by rainstorms and lightning, but also affected by strong winds. The insulator strings swing sharply, which greatly increases the probability of wind-bias flashovers.
Once a wind flashover occurs, the recombination efficiency of the transmission network is low. According to relevant literature, it is about 25%. economic loss
Moreover, after a wind deflection 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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  • Half-V-shaped suspension string for preventing windage yaw
  • Half-V-shaped suspension string for preventing windage yaw
  • Half-V-shaped suspension string for preventing windage yaw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A half-V-shaped hanging string for wind protection, such as figure 1 , figure 2 As shown, from bottom to top, it includes a suspension connecting plate 7, a connecting plate 6, a post insulator string 2 and an I-type insulator string 1, and an iron tower cross arm 8. The hanging connecting plate 7 is connected to the connecting plate 6, and the connecting plate 6 respectively connected to the post insulator string 2 and the I-type insulator string 1, the lower end of the post insulator string 2 forms an acute angle with the lower end of the I-type insulator string 1, and the post insulator string 2 and the I-type The insulator strings 1 are all connected to the cross-arm 8 of the iron tower, and the I-type insulator string 1 is vertically connected to the cross-arm 8 of the iron tower. The windproof semi-V-shaped suspension string of the present invention includes, from bottom to top, a suspension connecting plate 7, a connecting plate 6, a post insulator string 2, an...

Embodiment 2

[0027] Based on the above-mentioned embodiment 1, such as figure 1 , figure 2 As shown, the upper and lower parts of the I-type insulator string 1 are provided with voltage equalizing rings; the upper and lower parts of the post insulator string 2 are provided with voltage equalizing rings. In this embodiment, voltage equalizing rings are provided on the upper and lower parts of the I-type insulator string 1 and voltage equalizing rings are provided on the upper and lower parts of the post insulator string 2, which are used to enlarge the I-type insulator string 1 and the post insulator string 2 Capacitance to wires improves voltage distribution. In this embodiment, other content not described is the same as that in the foregoing embodiment, and will not be repeated here.

Embodiment 3

[0029] Based on the above-mentioned embodiment 2, such as Figure 1-3 As shown, the upper part of the I-type insulator string 1 is connected with the I-type string small pressure equalizing ring 3, the upper part of the pillar insulator string 2 is connected with the pillar string small voltage equalizing ring 4, and the connecting plate 6 is connected with a large equalizing ring. Compression ring 5 , the large pressure equalizing ring 5 is arranged at the lower part of the I-type insulator string 1 and the lower part of the post insulator string 2 . In this embodiment, an I-type string small grading ring 3 well known to those skilled in the art is provided on the upper part of the I-type insulator string 1, and a small grading ring 3 known to those skilled in the art is provided on the upper part of the post insulator string 2. The small grading ring 4 of the post string, because the lower end of the post insulator string 2 and the lower end of the I-type insulator string 1 ...

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Abstract

The invention discloses a half-V-shaped suspension string for preventing windage yaw. The half-V-shaped suspension string sequentially comprises an overhanging yoke plate, a yoke plate, a pillar insulator string and an I-type insulator, an iron tower cross arm arranged from bottom to top. The suspension yoke plate is connected with a yoke plate. The yoke plate is respectively connected with the post insulator string and the I-shaped insulator string, an acute included angle is formed between the lower end of the post insulator string and the lower end of the I-shaped insulator string, the postinsulator string and the I-shaped insulator string are both connected with an iron tower cross arm, and the I-shaped insulator string is vertically connected with the iron tower cross arm. The structure can ensure that the air gap between the wire and the iron tower does not exceed the limit under severe weather conditions such as sand storm, thereby being suitable for the side phase of the powertransmission line straight line iron tower in a gale area, preventing the overhead power transmission line from windage yaw flashover, avoiding large-area power failure accidents, and improving the power supply reliability of a power grid.

Description

technical field [0001] The invention relates to a suspension insulator string of a straight tower of an overhead transmission line, in particular to a structure for preventing wind deflection flashover accidents of an overhead transmission line in areas with strong winds, especially in areas prone to sandstorms. Background technique [0002] More and more overhead transmission lines pass through areas with harsh conditions. They are not only attacked by heavy rain and lightning, but also affected by strong winds. The insulator strings swing sharply, which greatly increases the probability of wind-bias flashover. Once a wind flashover occurs, the recombination efficiency of the transmission network is low. According to relevant literature, it is about 25%. economic loss. Moreover, after a wind deflection 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 tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G7/00H02G7/14
CPCH02G7/00H02G7/14
Inventor 马海木呷梁明刘炯黎亮王劲刘翰柱朱长青罗德塔罗鸣盛道伟魏德军曹立伟甘睿刘从法
Owner SOUTHWEST ELECTRIC POWER DESIGN INST OF CHINA POWER ENG CONSULTING GROUP CORP
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