摘要
新机理认为,架空输电线路导线有两种固有振动频率(机械固有振动频率ωj和电气固有振动频率2ω)导线在运行中,受到风力、重力及电动力的作用,会产生一定振幅的振动;空气作为导线的振动媒质,在导线的振动过程中,会阻碍导线的振动,在特殊的天气里,空气的动力粘性系降低,使空气的阻力小于导线的振动力,而使导线的振动加剧,当导线的振动频率与输电线路的机械固有振动频率jω或输电线路的电气固有振动频率2ω相接近时,则会被激发成强烈的共振—线路舞动。为了防止导线的振动及舞动,研制出一种新的导线防振器,它概能防止导线的振动,又能防止导线(包括单导线及分裂导线)的舞动。
Two connatural vibration frequencies, machine vibration frequency ω and electric vibration frequency 2ω, are being in transmission line according to new mechanism. Vibration with some swing will be oscillated under wind, gravity and eleetromotion loads as the conductor is moving. As the vibration intermedium of conductor, the air will block the vibration of conductor. At some especial weather, the air resistance is less than the conductor vibration so that the conductor vibration becomes increscent with the reduction of air driving viscosity, When the conductor vibration frequency is close to ωj or 2ω, strong resonance, namely conductor galloping, is excitated. A new conductor incabloc is manufactured to avoid conductor galloping.
出处
《东北电力大学学报》
2006年第1期65-70,共6页
Journal of Northeast Electric Power University
关键词
输电线
电动力
重力
振动
媒质
共振
线路舞动
transmission lines
eleetromotion load
gravity load
vibration, intermedium
resonance
conductor galloping
