Same-tower multi-loop power transmission line strain insulator string electrification replacing method and device

Abstract

The invention relates to a same-tower multi-loop power transmission line strain insulator string electrification replacing method and device. The method includes the following steps that: a distance between an operating cross arm and a jumper above the operating cross arm is extended, and an old insulator string is taken off; an insulating pull rope is tied on a buckling ring (9), and a buckling component (7) is installed at a side edge of a cross arm above an operating point, an insulating holding rod is rotatably connected with the buckling component (7), and a supporting rod (4) is perpendicular to the side edge of the cross arm, and the jumper is hung on a hanging hook (11); and an ground electrician pulls the insulating pull rope cooperatively, so that the supporting rod (4) rotates upwards, and the jumper rotates towards a position which is located above the outer side of a line until a worker on the operating cross arm can be separated from the jumper by an adequate safe distance assuredly, and then, the insulating pull rope is fixed. With the method and device of the invention adopted, an operation window can be expanded, and a technical problem that a worker cannot perform operation on an operating cross arm can be solved, and electrification maintenance work of cross arms at various layers of a 110kv-to-220kv same-tower multi-loop power transmission line can be realized.

Description

technical field [0001] The invention belongs to the technical field of transmission line operation and maintenance, and in particular relates to a live replacement method for tension insulator strings of multi-circuit transmission lines of 110 to 220kV on the same tower. Background technique [0002] The multi-circuit transmission line on the same tower can not only increase the transmission capacity per unit area, but also reduce the comprehensive cost and the demand for line corridors, which has obvious economic and social benefits. However, it is difficult to complete power outage maintenance for multi-circuit transmission lines on the same tower, and the defects and hidden dangers of the lines pose a serious threat to the safe and stable operation of the power grid. Therefore, it is particularly urgent to carry out live work on multi-circuit transmission lines on the same tower. [0003] However, multi-circuit transmission lines on the same tower are more compact than or...

AI Technical Summary

Problems solved by technology

However, it is difficult to complete power outage maintenance for multi-circuit transmission lines on the same tower. Defects and hidden dangers of the lines pose a serious threat to the safe and stable operation of the power grid. Therefore, it is particularly urgent to carry out live work on multi-circuit transmission lines on the same tower.

[0003] However, multi-circuit transmission lines on the same tower are more compact than ordinary lines, resulting in smaller safety distances between the middle phase, lower phase and upper lines of the transmission line

For the strain towers of 110~220kV multi-circuit transmission lines on the same tower, the operators can reach the end of the cross arm of the upper phase and carry out the live replacement operation of the tension insulator string; The safety distance between the cross-arm, middle-phase jumper and lower-phase cross-arm is small, making it difficult for operators to safely pass through the middle-phase and lower-phase cross-arm, making it difficult to safely and effectively carry out the replacement of strain insulator strings

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