特高压输电线路微风振动危害及影响

Analysis of the hazard and influencing factors of the aeolian vibration in UHV transmission lines

风致输电线振动中,微风振动是危及线路安全运行最为普遍的破坏形式。微风振动可能导致输电线的疲劳断股及电力金具的损坏,对输电线路的安全运行产生极大的威胁。本文结合特高压输电线路的特点,从流体动力学的角度分析了微风振动的成因,并对其产生的危害以及影响因素进行了详细探讨。结合国内外输电线的损坏实例,对微风振动的危害特点进行了总结,为微风振动的防护工作提供了技术条件。

Aeolian vibration of overhead electrical transmission lines is very common and can lead to fatigue damage. Aeolian vibration leads to fatigue fracture and damage of femoral component fittings and towers. From the view of fluid dynamics, this paper analyzes the cause of aeolian vibration and the influence factors of the hazards and the breeze vibration are discussed in detail. Combined with the domestic and international transmission line damage examples, this paper summarize the harm characteristics of aeolian vibration, and provides the technical condition for the protection work of the aeolian vibration.