Upward-winding tension-resistant tower on extra-high-voltage direct-current transmission line

Abstract

The embodiment of the invention provides an upward-winding tension-resistant tower on an extra-high-voltage direct-current transmission line. The upward-winding tension-resistant tower comprises a tower body, tower legs, a ground wire support and a guide wire cross arm, wherein an upward-winding wire jumper support is arranged on the outer side of the ground wire support, and the lower plane of the upward-winding wire jumper support is perpendicular to the central axis of the ground wire support; above the guide wire cross arm, an upward-winding wire jumper guides the current to an advancing side strain clamp from a retreating side strain clamp. According to the upward-winding tension-resistant tower on the extra-high-voltage direct-current transmission line, it is avoided that because the distance from the wire jumper to the ground is not enough, the rooting problem is caused or because the distance between trees on a high slope is not enough, the trees should be cut. Besides, for the tension-resistant tower located on a steep slope, the edge phase wire jumper is wound upwards to be arranged, on the one hand, influences on the environment are reduced, on the other hand, the perpendicular distance from a cross arm on the lowermost layer of the tower to the ground is effectively reduced, the consumption of tower material of the iron tower is reduced, and finally the purposes that comprehensive investment of the line is saved, the tower is convenient to construct and running reliability of the line is improved are achieved.

Description

technical field [0001] The invention relates to the field of high-voltage power transmission, in particular to a top-wound strain tower for an ultra-high voltage direct current line. Background technique [0002] At present, domestic ±800kV DC single-circuit strain towers mainly adopt dry-shaped iron towers, and the two poles are connected by a jumper scheme (down-lead jumper) hanging under the wire crossarm. There are mature design experiences in transmission lines. [0003] Due to the influence of jumper string length, jumper sag, and strain string inclination angle, the lowest point of the live part of the down-lead jumper of ±800kV UHV DC line is about 11m lower than the cross-arm of the strain tower conductor, so it may It will cause the tension tower to be squared to the ground or raised due to the insufficient distance between the jumper and the ground, especially in mountainous areas, where the tension tower stands on a steep slope, and the ground elevation of one p...

AI Technical Summary

Problems solved by technology

[0012] The embodiment of the present invention provides a UHV DC line top-wound tension tower to solve the disadvantages of the prior art that do not meet the requirements of environmental protection and have high cost

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