A comprehensive anti-dancing method for UHV vertically arranged transmission lines

Abstract

The invention discloses a comprehensive anti-galloping method of an extra-high voltage vertically arranged power transmission line. The method comprises the following steps of (A) determining hanging point positions of phase-to-phase spacers of the power transmission line according to the span of the power transmission line and installing the phase-to-phase spacers according to the hanging point positions; (B) determining the hanging point positions of phase-to-ground spacers on a lower phase conductor according to the span of the power transmission line; (C) determining the position of a ground anchor according to the predominant wind direction of an area in which the power transmission line is located and making the phase-to-ground spacers on the lower phase conductor located in a vertical plane after connecting the phase-to-ground spacers and an inverse predominant wind direction of the ground anchor; and (D) arranging the phase-to-ground spacers on the hanging points of the phase-to-ground spacers on the lower phase conductor, adjusting the line drawing lengths of the lower ends of the phase-to-ground spacers and keeping the pre-tightening force of the phase-to-ground spacers at 3-5kN at 0 DEG C. By combination of the phase-to-phase spacers and the phase-to-ground spacers, a good anti-galloping effect can be developed when the power transmission line gallops; meanwhile, the influence of an anti-galloping device on tension of the power transmission line is effectively reduced; and safe operation of the line is ensured.

Description

technical field [0001] The invention relates to the technical field of comprehensive prevention and control of galloping in transmission lines, in particular to a comprehensive galloping prevention method for UHV vertically arranged transmission lines. Background technique [0002] The increasing development of the scale of the power grid and the frequent occurrence of severe weather have resulted in a significant increase in the frequency and degree of harm of galloping in transmission lines. Light galloping in transmission lines can lead to phase-to-phase flashover, damage to ground wires, conductors, fittings and related components, and severe This will lead to line tripping, power outages, disconnection of towers, etc., especially the galloping of UHV transmission lines, which will affect a wider range and cause greater economic losses, seriously threatening the safe and stable operation of the power grid. At present, interphase spacers are widely used to control the pro...

AI Technical Summary

Problems solved by technology

[0002] The increasing development of the grid scale and the frequent occurrence of severe weather have resulted in a significant increase in the frequency and degree of harm of galloping in transmission lines. Light galloping in transmission lines can lead to phase-to-phase flashover, damage to ground wires, conductors, fittings and related components, and severe It will lead to tripping and power failure of the line, disconnection of the tower, etc., especially the galloping of the UHV transmission line, which will affect a wider range and cause greater economic losses, seriously threatening the safe and stable operation of the power grid.

At present, interphase spacers are widely used to control the problem of line galloping, but in recent years, a large number of interphase spacer or its supporting hardware flashover and fatigue fracture accidents have occurred frequently. The phase-to-ground insulation level is high, and the phase-to-phase spacer bears the line voltage during operation, the probability of phase-to-phase flashover is high, the insulation cost is high, and the phase-to-phase spacer has a poor inhibitory effect on vertically arranged lines.

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