高压输电线路舞动机理及防治措施

Dancing Mechanism and Prevention Measures of High Voltage Transmission Line

舞动是输电线路低频、大幅度自激励振动,容易引发导线断股、相间闪络、金具疲劳损坏,甚至引发杆塔倒塌断线发生。较全面地分析了架空输电线路舞动的危害,总结了容易产生舞动的气象特点以及输电线路结构设计参数对舞动发生的影响。对输电线路舞动机理进行了系统的梳理,指出每种机理的适应范围和局限性。对比分析了不同输电线路预防舞动的技术措施,总结出输电线路舞动存在的问题,为治理舞动工作提出指导意见,可进一步提供电网抵御灾害的能力。

Dancing is a low-frequency transmission line,a substantial self-excited vibration,easily lead wire broken shares,flashover between the phase,the fatigue of the hardware fatigue,and even lead to collapse occurred.The hazards of overhead transmission line galloping are analyzed in a comprehensive way.The meteorological characteristics that are prone to galloping and the influence of structural design parameters of transmission line on galloping are summarized.The mechanism of transmission line galloping is systematically reviewed,and the scope and limitations of each mechanism are pointed out.The technical measures to prevent galloping in different transmission lines are compared and analyzed.The problems existing in the galloping of transmission lines are summed up.Guidance is given for governing the galloping work,which can further provide the capability of the grid to resist disasters.