110 kilovolt double-circuit triangularly-arranged cable terminal pole

Abstract

The invention discloses a 110 kilovolt double-circuit triangularly-arranged cable terminal pole which comprises a main pole, two first cross arms and a second cross arm, the main pole is of a sectional spliced structure and is vertically arranged, the two first cross arms are horizontally and symmetrically arranged on the two opposite sides of the top end of the main pole, and one end of each first cross arm is fixed to the main pole; a second cross arm is arranged below each first cross arm in parallel at an interval, one end parts of the two second cross arms are respectively fixed with themain rod and are positioned on the same horizontal line, a distance A is formed between each first cross arm and the corresponding second cross arm, and the length of each first cross arm is greater than that of the corresponding second cross arm. Only two layers of wire cross arms are arranged, the total height of the tower is greatly reduced, the tower nominal height can be increased to the maximum extent under the conditions that 220-kilovolt wires are arranged above the tower and the clearance height is limited, the height of the lower wire to the ground can be increased, the possibility of casualties caused by electric shock of personnel is reduced, and the operation reliability of power equipment is improved.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a 110 kV double-circuit triangular arrangement cable terminal pole. Background technique [0002] With the rapid development of the national economy, the transmission line channel is becoming increasingly tense. Therefore, 220 kV and 110 kV mixed-voltage erection on the same tower are often used around the new 220 kV substation, and the 220 kV incoming line of the new substation is mostly used overhead. Lines, 110 kV outlets mostly use cable lines. At present, the commonly used wiring method is: 110 kV cables are laid below the 220 kV wires, lead up to the 110 kV terminal tower, and then connected to the 220 / 110 kV mixed voltage tower with overhead wires, and connected to the 220 kV line Erection with the tower. [0003] Since the common double-circuit drum-type arrangement cable terminal tower has three layers of conductor cross arms, the height of the tower head is re...

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Problems solved by technology

[0003] Since the common double-circuit drum-type arrangement cable terminal tower has three layers of conductor cross arms, the height of the tower head is relatively high. Under the premise of meeting the cross-span distance of the 220 kV conductors above the cable terminal tower, the title height is generally lower, resulting in 110 kV The distance between the wire and the ground is not high, and the later operation and maintenance is not used

However, most of the 110 kV crossarms of 220 / 110 kV mixed voltage towers are arranged in a triangle, and the use of ordinary 110 kV drum-shaped arrangement of cable terminal towers will lead to inflexible wire phase transformation and cannot be directly overlapped with mixed voltage straight towers, increasing the construction difficulty

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