Tool set capable of replacing insulator chain of ultra-high-voltage transmission line under electrified state and use method for tool set

A transmission line, live replacement technology, applied in the direction of overhead lines/cable equipment, etc., can solve the problems of unsuitable live replacement of double V-shaped whole string insulators of UHV DC transmission lines, mechanical strength and design type do not meet the requirements, etc. To achieve the effect of easy detachment, high safety and strong versatility

Inactive Publication Date: 2016-09-07
LIVE WORKING CENT OF STATE GRID HUNAN ELECTRIC POWER +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN203014262U discloses a compact transmission line V-type double-connected glass or porcelain insulator string replacement jig, patent CN201956623U designs a maintenance tool for ±660kV DC transmission line V-type single string insulators, and patent CN102361258B develops a A tool for live replacement of single V-string insulators for DC four-split lines, but the tool developed by the above-mentioned patent does not meet the requirements for mechanical strength and design type, so it is not suitable for live replacement of double-connected V-shaped full string insulators for UHV DC transmission lines

Method used

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  • Tool set capable of replacing insulator chain of ultra-high-voltage transmission line under electrified state and use method for tool set
  • Tool set capable of replacing insulator chain of ultra-high-voltage transmission line under electrified state and use method for tool set
  • Tool set capable of replacing insulator chain of ultra-high-voltage transmission line under electrified state and use method for tool set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Live replacement of double L-shaped composite insulators for UHV DC transmission lines

[0056] The layout of L series composite insulators 7 of ±800kV DC transmission line is as follows figure 2 As shown, the composite insulator strings arranged in an L shape and the overall length of the connected fittings are different. One end of the double-connected L-shaped composite insulator 7 is connected to the connecting plate of the hanging point on the wire side, and the other end is connected to the fitting on the hanging point on the cross arm side. Right-angle hanging plate, therefore, in order to meet the needs of replacing double-connected L-shaped composite insulators 7 of different lengths in UHV DC transmission lines and their connected fittings, replace the insulation in the kit of double-connected L-shaped composite insulators for UHV DC transmission lines with power The pull rod has the function of adjustable length.

[0057] according to figure 2 ...

Embodiment 2

[0083] Example 2: Live replacement of double-connected V-shaped string insulators for UHVDC transmission lines 8

[0084] see Figure 15 and Figure 16 , live replacement of UHV DC transmission line double V-type string insulator 8, that is, double V-type porcelain or glass insulator live replacement UHV transmission line insulator string kit, is to replace the live double L-type composite insulator 7 On the basis of replacing the UHV transmission line insulator string complete set of tools, connect the tightening screw rod 5 through the two inner through holes of the T-shaped knife card 3 (see Figure 17 ) and half-moon card 6 (see Figure 18-19), its structure is: including a cross arm side rear card 1 that can be installed on the hardware at the hanging point of the insulator and a T-shaped knife card 3 that can be installed on the wire hanging point hardware, the two rear cards 1 on the cross arm side An adjustable insulating pull rod 2 and a straight line tightener 4 a...

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Abstract

The invention discloses a tool set capable of replacing an insulator chain of an ultra-high-voltage transmission line under an electrified state and a use method for the tool set. The tool set for replacing a duplex L-shaped composite insulator comprises a cross arm side back buckle capable of being mounted on a fitting at the suspension point of the insulator, and a T-shaped large knife buckle capable of being mounted on the fitting at the suspension point of a wire; an adjustable insulating pull rod and a linear wire-tightening device are arranged between the two ends of the cross arm side back buckle and the two ends of the T-shaped large knife buckle; and meanwhile, on the basis of the developed tool set for replacing the duplex L-shaped composite insulator, two inner side through holes of the T-shaped large knife buckle are connected with a wire-tightening screw rod and a half-moon buckle so as to realize an operation of replacing a duplex V-shaped whole insulator chain of the ultra-high-voltage transmission line under the electrified state. By adoption of the tool set, the problem existing in replacing the duplex L-shaped composite insulator and the duplex V-shaped whole insulator chain of the ultra-high-voltage transmission line under the electrified state is overcome; a large-area power failure is avoided; the power supply stability and reliability of the power grid are effectively improved; and obvious economic and social benefits are achieved.

Description

technical field [0001] The invention relates to a complete set of tools for replacing insulator strings of transmission lines, in particular to a complete set of tools for live replacement of double-connected L-type and double-connected V-type insulator strings of UHV DC transmission lines. The invention also relates to a method for using the complete set of insulators for live replacement of double-connected L-type and double-connected V-type complete strings of UHV direct current transmission lines. Background technique [0002] With the rapid economic development, the construction of UHV transmission lines has become an inevitable requirement for the coordinated development of energy and economy and society in my country. At the same time, the global energy Internet uses UHV power grids as the backbone grid. With the development of UHV lines, double L-type insulators are widely used in small corner towers, and double V-type insulators are widely used in straight towers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 雷冬云李金亮梅文建曾文远甄朝晖郑克全冯刚李稳唐力刘治国
Owner LIVE WORKING CENT OF STATE GRID HUNAN ELECTRIC POWER
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