Safe method for entering tangent tower equal potentials for live-wire operation in 660kV direct current lines

A DC line and live working technology, applied in the direction of overhead lines/cable equipment, etc., can solve problems such as electric shock injuries, achieve high safety, and improve the effect of safe and stable operation

Active Publication Date: 2009-10-28
STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

In the project where the operator enters the equipotential of the wire from the grou

Method used

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  • Safe method for entering tangent tower equal potentials for live-wire operation in 660kV direct current lines
  • Safe method for entering tangent tower equal potentials for live-wire operation in 660kV direct current lines
  • Safe method for entering tangent tower equal potentials for live-wire operation in 660kV direct current lines

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[0010] The present invention will be further described below with reference to the drawings and embodiments.

[0011] figure 1 Description marked in: 1-Tower, 2-Insulator, 3-Equalizing ring, 4-Wire.

[0012] figure 2 Description marked in: 5-operator, D1-distance between the operator and the conductor and other charged objects.

[0013] image 3 Description marked in: 6-insulated vehicle, S1- distance from the operator to the grounding body such as the iron tower, S2- distance from the operator to the live body such as the wire.

[0014] Figure 4 Description marked in: D2-distance from the operator to the grounding body such as the iron tower.

[0015] In the embodiment of the present invention, the 660kV DC line live work enters the linear tower equipotential safety method as follows, see Figure 2~4 :

[0016] (1) Operator 5 wears a full set of shielding clothing on the ground under the tower, and climbs the tower 1 to the level of the tower body and the conductor. During ...

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Abstract

The invention provides a safe method for entering tangent tower equal potentials for live-wire operation in 660kV direct current lines. First, an operator, wearing complete shielding clothing, climbs a tower from the ground to the position where a tower body and a conducting wire are at the same level. During the climbing process, the operator keeps a distance of 4.5-7.0 meters from an electrified body; second, the operator arrives at a high electric field from the towel body by an insulating carrier and the sum of the distance between a grounding body and the operator and the distance between the operator and the electrified body is kept between 4.6 meters and 7.0 meters; and the operator, when arriving at the electrified body, keeps a distance of 4.5-7.0 meters from the grounding body. The safe method can provide high safety for operators during the process of entering the tangent tower equal potentials in the 660kV direct current transmission lines for live-wire operation which therefore can be safely and conveniently conducted so as to improve the safe and stable operation level of the transmission lines.

Description

technical field [0001] The invention relates to an equipotential safety method for 660kV DC line live work entering a straight tower, and belongs to the technical field of live work. Background technique [0002] The 660kV direct current transmission line belongs to a new voltage level in my country. It has the characteristics of large transmission capacity and long transmission distance. It will be constructed and put into use in Northwest my country and North China. The straight-line tower of the 660kV DC transmission line is a "dry-shaped" tower, and the "V-shaped string" hanging method is adopted, such as figure 1 shown. [0003] Live work is an important means to ensure the safe and stable operation of the transmission line. Therefore, after the 660kV DC transmission line is put into operation, it is also necessary to carry out live work, that is, the operator enters the equipotential to repair the line equipment when the line is not powered off. In the project where ...

Claims

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Application Information

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IPC IPC(8): H02G1/02
Inventor 胡毅王力农刘凯刘庭肖宾胡建勋徐莹郑传广
Owner STATE GRID ELECTRIC POWER RES INST
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