An installation method of windproof bias rigid insulation cable for high voltage transmission line

Abstract

A windage yaw preventing rigid insulating inhaul cable of a high-voltage power transmission line comprises a bar body. The two ends of the bar body are connected with hardware fittings respectively. The bar body comprises a bar core arranged inside and an umbrella skirt located outside the bar core, wherein the umbrella skirt is made of silicone rubber composite materials, and the bar core is a pull bar made of epoxy resin glass fibers. The windage yaw preventing rigid insulating inhaul cable of the high-voltage power transmission line can effectively prevent a wire from deflecting from a pole and tower under the action of heavy wind, avoid trip caused by windage yaw of the line and improve the safe operation level of the power transmission line.

Description

technical field [0001] The invention relates to the field of high-voltage transmission lines, in particular to a wind deflection flashover device for high-voltage transmission lines. Background technique [0002] The wind deflection of the transmission line refers to the phenomenon that the wire deviates under the action of the wind, resulting in insufficient insulation distance to the tower and flashover discharge. The success rate of closing is low due to the heavy wind of the line, which often causes serious consequences such as arc burns of conductors, broken strands, and disconnected wires. The wind deflection of transmission lines is one of the main factors affecting the safety of transmission lines, especially the frequent occurrence of wind deflection flashover accidents on 500kV transmission lines, which has caused great harm to the operation safety of transmission lines. [0003] Overhead transmission lines run in the wild for a long time and are greatly affected ...

AI Technical Summary

Problems solved by technology

When wind deflection occurs, it is usually accompanied by severe weather activities such as strong winds and thunderstorms, which makes it difficult to judge and find faults

At present, the common prevention and transformation measures are to install jumper strings or heavy hammers on the wires of the wind deflection fault, but the wind deflection effect of the wires is often unsatisfactory under these two methods of transformation.

First of all, the wires with jumper strings are still prone to wind deflection tripping; second, the heavy hammer has a large surface area and is easy to go for a ride. When the strong wind blows to the hammer, it will cause wind deflection flashover

Thirdly, after installing heavy hammers on the conductors, each piece of heavy hammers weighs several hundred kilograms, and the force of the conductors has a certain upper limit according to the design requirements, so an extra load is added to the tower. It is necessary to re-check the load of the tower, and at the same time, the design margin will be sacrificed for the tower, which will easily cause damage to the tower in strong winds. The cost of the hammer is high, the transportation is inconvenient, and the cost of transformation and installation is high

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