Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work

Abstract

The invention provides an equipotential access method of a 500kV same-tower four-circuit transmission line tangent tower live-wire work which can safely access into an outside 6-phase wire by adopting a sliding rail-centipede-type ladder-hanging seat method or a flexible ladder method. The sliding rail-centipede-type ladder-hanging seat method is characterized in that beside the outside wire, one end of an insulated centipede-type ladder is connected with a hanging seat, the other end of the insulated centipede-type ladder is connected with a sliding rail, the sliding rail is arranged at the upper end of the outside wire near the tail end of a cross arm; and the flexible ladder method is characterized in that the insulated flexible ladder is hung at the tail end of the cross arm, and a pulley provided with an insulated control rope is arranged in the middle of the cross arm. The two methods can both ensure that the equipotential access operation of the 500kV same-tower four-circuit transmission line tangent tower live-wire work is finished safely and smoothly.

Description

technical field [0001] The invention relates to a 500kV same-tower four-circuit transmission line line tower live operation entering equipotential method, which belongs to the technical field of transmission line operation and maintenance. Background technique [0002] The 500kV four-circuit transmission line on the same tower has the advantages of large transmission capacity and less land occupation of line corridors. A 500kV four-circuit transmission line with the same tower has been built in East my country. The linear tower of the line adopts a three-layer cross-arm tower type, each layer of cross-arm is divided into left and right sides, each side has inner and outer conductors, the inner conductor is close to the tower body, and the outer conductor is far away from the tower body. Such as figure 1 shown. [0003] Live work is an important means to ensure the safe and stable operation of transmission lines. Therefore, after the 500kV four-circuit transmission line on...

AI Technical Summary

Problems solved by technology

However, the 500kV same-tower four-circuit straight-line tower has only cross-arms and no tower body around the outer 6-phase conductors. The conventional 500kV access equipotential method cannot be used for 500kV same-tower four-circuit transmission lines. Therefore, it must be adopted according to the characteristics of 500kV same-tower four-circuit lines. New Entry Equipotential Method

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