Conductor galloping resistant method of iron towers of overhead power transmission lines

Abstract

The invention relates to a conductor galloping resistant method of the iron towers of overhead power transmission lines. The method comprises the following steps: building a iron tower model, setting conductor galloping parameters, building a coupling system model of iron towers and conductors, adding iron tower nodal loads, setting tower foot nodal constraints, defining a load curve; setting time parameters, using a core computing module for computing and solving; using a post-processing module to directly display the galloping animation of conductors and iron towers, and directly computing and outputting an internal force-time history curve of iron tower units; and checking the bearing capacity of iron tower units according to the computed and output internal force-time history curve ofiron tower units, and judging whether iron tower units are needed to reinforce. The conductor galloping resistant method considers the coupling effect of iron towers and conductors, has higher accuracy in the research of the conductor galloping rule, and can be used to compute and analyze the influence of conductor galloping on iron towers, research the galloping-resistant bearing capacity of iron towers and provide the basis of iron towers reinforcement, thus meeting the needs of scientific researches and engineering designs.

Description

technical field [0001] The invention relates to a method for resisting conductor galloping of an iron tower of an overhead power transmission line. Background technique [0002] Conductor galloping is the nonlinear vibration of fluid-solid coupling generated by ice-coated conductors under the excitation of relatively stable wind. [0003] The ice-coated wire has a large galloping range, a long duration, and great harm. In the lightest case, phase-to-phase flashover, damage to conductors and fittings, in severe cases, it may lead to accidents such as line tripping, power outage, disconnection and tower collapse, resulting in major economic losses. In the southern ice disaster in 2008, many transmission line towers were damaged due to wire dancing. Wire galloping is accidental in time and space and is difficult to observe. my country is a country with frequent galloping, and conductor galloping has become one of the important factors threatening the safe and stable operatio...

AI Technical Summary

Problems solved by technology

[0005] Previous research on galloping focused on the conductor gallop itself, and approximated the iron tower as a spring-supported boundary. This research method has the following disadvantages: (1) The coupling effect between the iron tower and the conductor is not considered; (2) The

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