Jumping around transposition tower in common-tower double-circuit transmission line

Abstract

The invention discloses a jumping around transposition tower, for power system transmission lines, in a common-tower double-circuit transmission line. The jumping around transposition tower is especially suitable for transposition of high-altitude high-voltage transmission lines. The jumping around transposition tower aims to provide the jumping around transposition tower which is capable of realizing transposition without increasing jumper cross arm length. The transposition tower comprises a tower body. An upper wire cross arm and a lower wire cross arm are mounted on the front side and the rear side along the direction of the transmission line. An upper jumper and a lower jumper are connected between the upper wire cross arm and the lower wire cross arm. The front section of a third transmission line is connected to the upper cross arm and connected with one of the upper jumper and the lower jumper through a third upper transposition jumper. The rear section of the third transmission line is connected to the lower cross arm and connected with the same one of the upper jumper and the lower jumper through a third lower transposition jumper. Consumable materials and manufacturing cost are saved, tower weight is reduced, transport and mounting in area with inconvenient traffic are facilitated, jumper leading is simple, construction and operation maintenance are facilitated, and the jumping around transposition tower is worthy of popularization.

Description

technical field [0001] The invention relates to a single-tower double-circuit tower used for transmission lines of electric power systems, and is especially suitable for transposition use in high-altitude and high-voltage transmission lines. Background technique [0002] The function of line transposition is to reduce the unbalanced current and unbalanced voltage during the normal operation of the power system. In the power network where the neutral point is directly grounded, the transmission lines with a length of more than 100km should be transposed. The transposition cycle length should not be greater than 200km. [0003] There are generally many ways to transpose long-distance transmission lines at present. The main ones are as follows: one is to construct two single circuits, and long-distance transmission lines are generally carried out in each single circuit. This technology is relatively mature, and the investment It is relatively economical, but has higher require...

AI Technical Summary

Problems solved by technology

[0004] With the application of high-voltage and ultra-high-voltage transmission lines and the increase of transmission projects in high-altitude areas, in order to reduce the cleaning and construction costs of line corridors in high-altitude areas, it is no longer suitable to use two single-circuit constructions, and it is necessary to use double-circuit transmission lines on the same tower , and according to the existing transposition method around the outside of the tension tower, due to the thin air, the electrical clearance distance is required to be larger, so it is necessary to install a longer wire crossarm on the transposition tower to ensure the distance between the upper and lower crossarms. The safety distance increases the load of the iron tower and the consumption of tower materials, which increases the transportation cost and construction cost accordingly, which is extremely unsuitable for applications in areas with inconvenient traffic and transportation.

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