A 110kv overhead line front and rear cable type double circuit steel pole type terminal tower

Abstract

The invention discloses a 110kV overhead line front-back cable type double-loop steel pipe pole-type terminal tower comprising a tower body, a front overhead loop, a rear overhead loop, a lightning arrester, a cable and a cable terminal. The tower body is provided with a lightning conductor crossarm, a middle-phase conductor jumper string crossarm, a middle-phase conductor crossarm, an edge phase conductor crossarm, a middle-phase cable fixing crossarm, an edge phase cable head fixing crossarm and an edge phase cable fixing crossarm sequentially from top to bottom; the front overhead loop and the rear overhead loop are two loops in independent operation, and each of the front overhead loop and the rear overhead loop comprises a lightning conductor, a middle-phase conductor and an edge phase conductor; the front overhead loop and the rear overhead loop are mounted to the corresponding crossarms respectively through strain insulator strings, and the tower body is mounted on a foundation. The front overhead loop and the rear overhead loop are mounted to the corresponding crossarms of the same base tower respectively, only one base tower is set up and only one tower foundation is made, and accordingly investment is reduced while land occupation area is reduced; both the tower body and the foundation are of terminal design, and reliable operation of the line is guaranteed.

Description

technical field [0001] The invention relates to the technical field of power transmission lines, in particular to a front and rear cable-type double-circuit steel pole-type terminal tower for 110kV overhead lines. Background technique [0002] According to the planning requirements of the State Grid, in order to meet the power supply demand in a certain area, it is necessary to build a new two-circuit overhead line to provide incoming power for the substation. However, there is only a 110kV single-circuit overhead line in this area, which cannot meet the power supply of the two-circuit overhead line. In order to solve this problem, such as Xinli 110kV double-circuit umbrella-shaped steel pipe pole-type cable terminal tower, the cable lines are connected from both sides of the tower, which will make the straight line hanging strings of the original line before and after the tower skewed, and reduce the wire pair to a large extent. The height of the ground threatens the reliab...

AI Technical Summary

Problems solved by technology

[0002] According to the planning requirements of the State Grid, in order to meet the power supply demand in a certain area, it is necessary to build a new two-circuit overhead line to provide incoming power for the substation. However, there is only a 110kV single-circuit overhead line in this area, which cannot meet the power supply of the two-circuit overhead line.

In order to solve this problem, such as Xinli 110kV double-circuit umbrella-shaped steel pipe pole-type cable terminal tower, the cable lines are connected from both sides of the tower, which will make the straight line hanging strings of the original line before and after the tower skewed, and reduce the wire pair to a large extent. The height of the ground threatens the reliability of the line operation; if a new two-base single-circuit cable terminal tower is established, two new base towers are required, which requires a large amount of engineering and two adjacent tower locations should be selected at the same time in buildings and densely populated areas. difficulty

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