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A live replacement method for single-piece tension insulators of UHV transmission lines

A technology of tensile insulators and transmission lines, applied in the direction of overhead lines/cable equipment, etc., to reduce the length of short-circuits, ensure safe distance, and improve safety.

Active Publication Date: 2018-08-14
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method of live replacement of single-piece tension insulators of UHV transmission lines, which solves the problem of how to safely replace single-piece tension insulators of UHV transmission lines

Method used

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  • A live replacement method for single-piece tension insulators of UHV transmission lines

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Embodiment 1

[0029] Such as figure 1 As shown, the invention of this example is a method for live replacement of a single-piece tensile insulator of an UHV transmission line, and the method includes the following steps:

[0030] (1) Live workers perform potential transfer and form an equipotential with the charged body;

[0031] (2) The live operator installs the whole string tightening device;

[0032] (3) The live operator installs a single-piece tightening device;

[0033] (4) Live workers replace the insulators to be replaced.

[0034] In the step (1), under the condition that the safety distance and the combination gap of UHV live work are satisfied, the live working personnel travel along the insulator to the end of the split conductor 17 in a way of crossing two short threes to a distance of two insulators from the charged body (approximately 0.4m). .

[0035] The way of crossing two and shorting three is that the live operator faces the direction of the horizontal line, moves ...

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Abstract

The invention relates to a method for live-line replacement of high voltage power transmission line monolithic strain insulators. The method provided by the invention is characterized in that the live-line operation personnel can carry out the potential transfer, and the equipotential can be formed with the charged body; the live-line operation personnel can install the whole string of insulator tightening devices ; the live-line operation personnel can install the monolithic insulator tightening device; and the live-line operation personnel can replace the insulators to be replaced. According to the method provided by the invention, the cooperated utilization of two independent strain transfer systems can be realized by the installation of the whole string of the insulator tightening devices and the monolithic insulator tightening device, and the safe inspection and maintenance of the ultrahigh voltage power transmission line live-line replacement of the monolithic strain insulators can be realized.

Description

Technical field: [0001] The invention relates to a method for replacing insulators with electricity, and more particularly relates to a method for replacing single-piece tension insulators with electricity for UHV transmission lines. Background technique: [0002] In the power system, the insulators of high-voltage transmission lines may be damaged or deteriorated during operation, and it is an inevitable requirement for the operation and maintenance of transmission lines to replace insulators in abnormal states by means of live work. [0003] At present, the project of live replacement of tensile insulators on transmission lines with a voltage level below 500 kV has become more common, and tools such as closed cards are usually used to complete the replacement of single-piece insulators. In recent years, AC 1000 kV and DC ±800 kV UHV transmission projects have been completed and put into operation one after another. UHV lines have large mechanical loads and long insulator s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/02
Inventor 肖宾梁建伟刘凯曹明德吴田刘庭李斐明牛彪彭勇刘艳苏梓铭唐盼雷兴烈
Owner STATE GRID CORP OF CHINA
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