Cable terminal pole used for fracture of single circuit in double-circuit same-tower parallel-framed power transmission line

Abstract

The invention discloses a cable terminal pole used for a fracture of a single circuit in a double-circuit same-tower parallel-framed power transmission line. The cable terminal pole comprises a cableterminal pole body, and an upper-layer cross arm structure, a middle-layer cross arm structure and a lower-layer cross arm structure are distributed at the upper part of the cable terminal pole body at intervals from top to bottom; the left side and the right side of the front end of the upper-layer cross arm structure are each connected with a fractured overhead conductor through a strain insulator string; the left sides and the right sides of the front ends of the middle-layer cross arm structure and the lower-layer cross arm structure are also each connected with a fractured overhead conductor through a strain insulator string; and the strain insulator strings are horizontally distributed and are perpendicular to the cable terminal rod body. According to the invention, not only can enough safe distance be kept between drainage wires connected with the overhead conductors, but also when the fracture connection operation of a new line is carried out on one circuit line in a same-towerparallel-framed double-circuit line, the other circuit line does not need to be subjected to power failure processing, so that the safe operation of the cable terminal tower is ensured.

Description

technical field [0001] The invention relates to the technical field of electric power transmission, in particular to a cable terminal rod used for breaking one circuit in a double-circuit same-pole parallel-frame transmission line. Background technique [0002] At present, with the rapid development of the economy, the improvement of urban construction and the modernization of enterprises, electricity, which is the lifeblood of the economy, has encountered unprecedented challenges. [0003] In order to meet the demand for power supply, the proportion of power cables in the power grids of major cities is increasing. In addition, with the increase of municipal construction and land development, high-voltage cables are gradually entering urban areas, and the current high-voltage overhead lines in urban areas are gradually being transformed into cables. However, limited by road network planning and topography, when pure cable lines cannot be implemented, it is necessary to use ...

AI Technical Summary

Problems solved by technology

[0005] At present, for 110kV to 220kV double-circuit voltage level parallel transmission lines on the same pole, if it is necessary to break one side of the line (that is, to connect one side of the circuit to a new line), then it is necessary to build two base cable terminal towers, which not only occupy The ground area is large, the investment is high, and when a new circuit is connected with a break in one circuit, not only the circuit needs to be blacked out, but also the other circuit in the double circuit of the same pole is also required to be blacked out. Therefore, it has seriously affected people's work and life, and brought inconvenience to people's work and life.

[0006] In addition, for conventional cable terminal towers, which have multiple drainage wires (that is, lead wires), due to unreasonable structural design, the straight-line spacing between the drainage wires connected to the overhead lines is too small to ensure the drainage of the overhead lines. The distance between the lines is kept at a relatively large safety distance, and there are certain hidden dangers in operation safety

Images