Novel tower for extra-high voltage dual-circuit compact transmission

Abstract

The invention provides a novel tower for extra-high voltage dual-circuit compact transmission, which comprises an upper cross arm, a v-shaped insulator string, an I-shaped straight string, a low-phase flexible insulator, a lower cross arm and a tower body. The novel tower is characterized in that a two-circuit six-phase extra-high voltage lead is hung between the upper cross arm and the lower cross arm, upper two-phase leads are hung on the same cross arm which is not provided with a lateral crank arm; a lower-phase lead is fixed by an upper insulator and a lower insulator through applying a pull force in a reverse direction; and the flexible insulator is adopted as a lower side insulator of the fixed lower-phase lead, even if the lead has a certain elastic activity space, transverse displacement of the lead is controlled. According to the structure of the novel tower in the invention, a lower bending arm is eliminated, and bending deformation, even breaking possibility, of the lower bending arm under the condition of a heavy load is avoided; and the flexible insulator is adopted as the lower side insulator of the fixed lower-phase lead, even if the lead has a certain elastic activity space, transverse displacement of the lead is controlled.

Description

technical field [0001] The invention relates to a new type of tower used for ultra-high voltage double-circuit compact power transmission on the same tower, which belongs to the field of power system transmission line pole tower design, and especially relates to 1000kV and above ultra-high voltage level double-circuit compact power transmission lines on the same tower supporting three-phase conductors The design scheme of the tower structure that forms the insulation gap. Background technique [0002] In order to reduce the cost of electric energy transmission and reduce the land occupation of transmission corridors, the use of UHV-grade lines and compact power transmission methods are two very effective ways. Therefore, UHV power transmission and compact power transmission are regarded as long-distance The optimal solution for large-capacity power transmission. According to the needs of long-distance transmission of electric energy in my country, my country has vigorously ...

AI Technical Summary

Problems solved by technology

In order to ensure that the lower bending arm is not stretched and deformed, the design size is usually larger, which increases the cost of the tower

If the ultra-high voltage double-circuit compact tower with the same tower still uses this type of tower, the design size of the lower bending arm of the T-shaped tower will be significantly increased to ensure sufficient bearing capacity, and the ability to resist heavy loads such as strong winds and repeated ice poor

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