A kind of wire suspension method for preventing wind deflection of transmission lines in strong wind areas

Abstract

The invention relates to a lead wire hanging method for preventing windage yaw of a power transmission line in a strong wind area. The power transmission line comprises a power transmission tower, a lead wire, an insulator string and connection fittings of the insulator string, wherein the power transmission tower comprises a tower window and a tower body; and the insulator string is vertically arranged below the tower window of the power transmission tower. The method comprises: determining the length of the I-type suspension insulator string on a side phase of the power transmission tower; mounting one group of two insulating pull rods on the tower window, fixing one ends of the insulating pull rods to the outer edge of the tower window, and fixing the other ends of the insulating pull rods to a high-voltage-end connection hanging plate of the suspension insulator string; enabling the edge of the tower window and the two insulating pull rods to form a triangular cone-shaped structure; and determining the lengths of the insulating pull rods according to the width of the tower window and the length of the suspension insulator string. The other group of two insulating pull rods is mounted between the tower window and the tower body, and the distance from the insulating pull rods to the tower body should be ensured to be greater than a minimal safety distance after windage yaw of the lead wire. According to the technical scheme provided by the invention, the flashover probability of the power transmission line in the strong wind area due to windage yaw can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of electric power overhead transmission line protection, and more particularly relates to a wire suspension method for preventing wind deflection of a transmission line in a strong wind area. Background technique [0002] In recent years, with the frequent occurrence of strong convective weather, the wind deflection flashover accidents of transmission lines have become increasingly prominent. The most essential reason for the wind deflection discharge on the transmission line is that the air gap distance between the conductor-tower or conductor-conductor on the transmission line is reduced under various external adverse conditions. When the electric strength of this gap distance cannot withstand the system Breakdown discharge occurs at the highest operating voltage. At present, domestic and foreign studies on wind deflection faults of transmission lines have done a lot of research work on the calculation mo...

AI Technical Summary

Problems solved by technology

At present, domestic and foreign studies on wind deflection faults of transmission lines have done a lot of research work on the calculation model of wind deflection, the design and calculation method of wind deflection angle, and the basic research of wind parameters. The center is designed according to the pure air gap, and does not consider the existence of foreign objects (such as raindrops, hail, etc.) in the air gap and the impact of strong wind and rain on the electrical insulation strength of the tower head

[0003] In order to prevent the wind deflection flashover of the transmission line, the main measures that can be taken now are to refine the design wind speed value, increase the weight under the suspension line clamp of the straight tower, use V-shaped suspension insulator strings, and increase the vertical span, etc. These measures To a certain extent, the wind deflection flashover of the insulator string is suppressed, but the effect is not ideal

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