摘要
在输电线路的舞动中,分裂导线的扭转起着重要的作用,因此研究分裂导线—间隔棒体系的扭转刚度对于深入研究输电线路的舞动有重要意义。通过研究分裂导线发生扭转运动时子导线长度的变化,估算了子导线由扭转引起的导线张力变化;除了考虑了以往研究所涉及的一些影响分裂导线扭转刚度的因素(如单根导线扭转刚度、导线实际张力等)外,还在前人推导公式的基础上加入了扭转引起的导线张力变化、导线弧垂、线路两端高度差的影响,最终推导出了新的分裂导线—间隔棒体系扭转刚度的一般计算公式。通过与前人计算公式和实测数据比较,对于在不同的分裂数、不同的次档距数目、不同的初始水平张力等条件下,使用本文推导公式的计算结果更接近实测值。
In galloping of transmission lines,the twist of bundled conductors plays an important role. So the re-search of torsional stiffness of conductors-spacers for in-depth study of the galloping of the transmission lines is important. In addition to considering the impact of previous studies involving some of the torsional stiffness of bundled conductors factors （ such as the torsional stiffness of sub conductor,the actual tension,etc. ） ,but also the effects of sag and line height difference are considered. Finally a theoretical torsional stiffness of conduc-tors-spacers formula is deduced. With the previous formula and the measured data on the different conductor types,different sub conductor spacing and different initial tension conditions, the results of this formula are closer to the measured data.
出处
《东北电力大学学报》
2014年第1期73-79,共7页
Journal of Northeast Electric Power University
关键词
分裂导线
扭转刚度
导线张力
舞动
Bundled conductors
Torsional stiffness
Conductor tension
Galloping
