500kV六分裂导线舞动时的动张力变化特征

利用真型输电线路综合试验基地,当实现输电线路在人工模拟覆冰条件下的自然风激励起舞后,对500kV输电线路六分裂导线舞动过程的导线动张力进行测量,并分析了导线动张力的频谱特性及其与风速的相关性,从而得到了导线动张力与舞动状态及有效风速之间的关系.结果表明:作为线路舞动的表征参数,导线动张力不仅能够用于输电塔线体系的安全可靠性分析,而且能够用于输电线路的舞动监测和模式识别中,为输电线路的舞动预警及其防治措施的性能评估提供数据支撑.

Characteristics of Conductor Dynamic Tension During Galloping for 500 kV Power Transmission Line with 6-Bundle

Taking the advantage and basic condition of comprehensive test centre built on real overhead transmission line (which belongs to State Grid Company of China), the conductor tension during galloping for 500 kV 6-bundle transmission line was measured and analyzed by using artificial airfoils with D shape on conductor, which had been proved to be quite essential for galloping excitation. Through the frequency spectrum comparison and the correlation analysis with wind load, the characteristics of conductor dynamic tension during galloping were obtained. It was shown that the conductor dynamic tension could be used as one of the critical parameters for galloping, which would not only be used for reliable analysis of tower-line system, but also be applied for the monitoring and identification of transmission line galloping. In a word, the characteristics of conductor dynamic tension during galloping are the basic data for the pre-warning of galloping and the performance evaluation of anti-galloping measuring.