The method and tools used to enter the strong electric field vertically along the insulator string

Abstract

The invention relates to a method for vertically entering a strong electric field along an insulator string and a tool used by method. An equal potential operator vertically stands on an anti-tension insulator string, carries a walking stick type insulator steel cap fixing clamp with each of two hands to clamp a steel cap of another anti-tension insulator string and vertically enters the strong electric field along the anti-tension insulator string; when moving along the anti-tension insulator string, the equal potential operator releases the clamp farther away from a live lead wire and slowly puts the clamp close to another clamp; after the two clamps clamp the steel cap of an insulator simultaneously, the equal potential operator moves along the anti-tension insulator string in a two-crossing and three-short-circuit manner to arrive at the working position; each walking stick type insulator steel cap fixing clamp comprises a rod body and a clamping mechanism arranged at the lower end of the rod body; the steel cap of the insulator is clamped or released by the clamping mechanisms. According to the method disclosed by the invention, the physical exhaustion is greatly reduced; furthermore, the operator feels more comfortable in an operating process; the method is particularly suitable for a + / -800kv direct-current ultrahigh-voltage power transmission line.

Description

technical field [0001] The invention belongs to the field of ultra-high voltage power transmission and transformation, and in particular relates to a vertical method for entering a strong electric field along an insulator string and a tool used therefor. Background technique [0002] Freestyle (semi-squatting) method of entering strong electric field along the insulator string is often used in 750 kV and below ultra-high voltage transmission line live work, the key steps are as follows: equipotential electrician adopts freestyle (semi-squatting) method to enter strong electric field , that is, the equipotential electrician squats on a string of tension insulators and holds another string of tension insulators with both hands. When an equipotential electrician moves along a string of tension insulators, step on an adjacent insulator with two feet, hold the skirt of the corresponding insulator with both hands at the same time, squat halfway on the insulator, and move with one ...

AI Technical Summary

Problems solved by technology

[0004] 1) Due to the high voltage level of the ±800 kV UHVDC transmission line, the distance between the tension insulator strings is relatively long, with a distance of about 1 meter. Farther away, the hands must be kept straight all the time, and the operator cannot maintain a half-squat state, but moves in a half-push-up state

[0005] 2) The tension insulator string of the ±800 kV UHV DC transmission line is about 20 meters long, and the number of insulators reaches 60 pieces. One equipotential electrical work is equivalent to doing half push-ups 120 times. The labor intensity is relatively high, which will consume too much work The physical strength of the personnel will affect the follow-up live work work or even fail to complete the work

[0006] In fact, in the current ±800 kV DC UHV transmission lines, the free (semi-squatting) method of entering a strong electric field along the insulator string is still commonly used, and there is no better alternative

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