Double circuit single line transposition tower in the same tower

Abstract

The invention discloses a same-tower dual-loop single-line transposition tower used for electric transmission lines of an electric power system, which is particularly suitable for transposition use in high-altitude and high-voltage electric transmission lines. The invention provides a transposition tower capable of realizing transposition and being relatively low in examine and repair cost without increasing the lengths of wire cross arms on the basis of same-tower dual-loop, wherein the transposition tower comprises a tower body; an upper wire cross arm and a lower wire cross arm are arranged on one side of the front side and the back side of the upper and the lower parts of the tower body along the direction of the electric transmission lines; an upper and a lower jumper wires are connected between the upper wire cross arm and the lower wire cross arm; the front section of the third electric transmission line is connected with the upper cross arm, and is connected with the upper and the lower jumper wires through a third upper deflection jumper wire; and the back section of the third electric transmission line is connected with the lower cross arm, and is connected with the upper and the lower jumper wires through a third lower deflection jumper wire. Through the application of the same-tower dual-loop single-line transposition tower disclosed by the invention, the material and manufacturing costs are saved, the weight of the tower body is reduced, and the transposition tower is beneficial to transportation and installation of areas with inconvenient traffic.

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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