Method for preventing and controlling ice disasters of power transmission line

Abstract

The invention discloses a method for preventing and controlling ice disasters of a power transmission line for deicing jump of an electric wire. The method comprises the following steps: calculating the length of the wire when the electric wire jumps to the highest position or the sag when the wire jumps to the highest position; calculating the tension of the electric wire according to the lengthof the electric wire when the electric wire jumps to the highest position during deicing or the sag when the electric wire jumps to the highest position during deicing, judging whether the tension ofthe electric wire is overloaded or not, and loosening the electric wire if the tension of the electric wire is overloaded. The method provided by the invention does not need finite element analysis and software thereof, is simple and practical, has high independence, can calculate and verify the tension of the highest deicing position of the electric wire in advance, actively takes measures, avoids the accidents of wire breakage, strand breakage, damage to wire hanging hardware, insulators, brackets and tower materials and the like caused by deicing jump of the wire. Flashover tripping of thepower transmission line due to ice-shedding jump is prevented, and the method has good integration with an existing overhead power transmission line calculation method and is convenient to embed intoexisting power transmission line calculation software.

Description

technical field [0001] The invention relates to the field of power transmission lines, in particular to a method for preventing ice disasters of power transmission lines for deicing jumps of electric wires. Background technique [0002] At present, there are mainly two methods of research on wire deicing and jumping: experiment and numerical simulation. At home and abroad, the finite element analysis method is usually used to calculate the amplitude and tension of the wire deicing jump, and then use numerical analysis, element analysis, numerical fitting and other induction methods to obtain the relationship between the influencing factors and the deicing jump amplitude and tension. Both the test method and the numerical simulation method are calculated and analyzed under relatively special conditions, lacking universality and completeness, and the conclusions obtained are difficult to be widely used in actual engineering. Then the destructive effect of wire deicing and jum...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preventing ice disasters of transmission lines used for deicing and jumping of electric wires, so as to solve the problem of lack of universality and completeness caused by finite element analysis and its software in existing methods

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