500kV线路大跨越微风振动在线监测

An on-line measurement system of aeolian vibration of500 kV transmission line crossing

大跨越是整条输电线路的防振重点,大跨越的安全运行在很大程度上取决于导、地线和防振装置的可靠性。微风振动引起导、地线疲劳断股等事故是通过累积效应的方式发生的,有一个累积时间和过程。国内大量的证据表明:微风振动严重威胁着架空输电线路特别是大跨越的安全运行。文中简要讨论了输电线路微风振动的机理,介绍了一种通过监测仪和计算机网络方式实现的对大跨越导、地线进行远程监视的在线测量系统,并对测量数据进行分析,以便为线路的运行和维护工作提供帮助。

The aeolian vibration of overhead transmission lines is a well known phenomenon which leads to fatigue damages of conductors, this paper introduces the basic principle of aeolian vibration of a conductor, and a new on-line measurement system based on sensors and interact, which gives the field aeolian vibration data all the time on Huaihe River crossing span of Pingwei-Feixi 500 kV transmission line.