Method for transforming tangent tower of double-circuit double-bundle transmission lines by lifting in electrified mode in another place

Abstract

The invention discloses a method for transforming a tangent tower of double-circuit double-bundle transmission lines by lifting in an electrified mode in another place, which belongs to the field of equipment installation. In the method, the current old tower and a common-tower double-circuit transmission lines thereon are involved. The method adopts a construction process of assembling a new tower in the electrified mode at a new tower position by using a landed derrick mast, transferring earth wires from the old tower to the new tower in the electrified state, and dismantling the old tower in the electrified mode in the longitudinal space between the common-tower double-circuit transmission lines, avoids the phenomenon that the two common-tower double-circuit lines have power failure atthe same time, improves the safety and the reliability of a power grid, overcomes the difficulty of an insufficient safe distance between a craning rope and electrified wires, and solves the problemsthat an cross arm member is overlarge, has the insufficient safe distance to the electrified wires, and is difficultly controlled by installation personnel. By slitting a tower body section member into 4 parts according to main materials and craning the 4 parts separately, the craning load of the derrick mast is lowered, and working safety is improved. The method can be widely applied to the fields of the displacement or transformation of the conventional overhead power transmission lines or iron towers.

Description

technical field [0001] The invention belongs to the field of installation of cables or wires, and in particular relates to a live displacement installation method for overhead transmission lines / iron towers in different places. Background technique [0002] Due to the need for safety, a certain safe distance needs to be maintained between high-voltage overhead transmission lines and surrounding buildings or facilities. According to the "Regulations on the Protection of Electric Power Facilities" and its implementation rules, lines other than 500kV and above shall not cross long-term residents. Outside the building, when the special circumstances of 220kV and below need to cross the house, it can be crossed under the condition of ensuring safety. [0003] According to the "110-750kV Overhead Transmission Line Design Technical Specifications", the minimum vertical distance between the 220kV transmission line conductor and the building is 6 meters, and the minimum vertical dist...

AI Technical Summary

Problems solved by technology

However, it is only suitable for laying new lines on the original towers, and it can only be carried out if the existing lines are powered off. It is not suitable for the off-site displacement and reconstruction projects of lines / towers in the live running state.

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