扇形覆冰导线舞动特性数值模拟分析  

Numerical Analysis of Galloping Character of Fan-Shaped Ice Cover Conductor

作　　者：陈友慧 杨继业 马强 鄢闯 李冬雪 CHEN Youhui YANG Jiye MA Qiang YAN Chuang LI Dongxue(State Grid Liaoning Electric Power Company Limited Economic Research Institute, Shenyang, Liaoning 110015, China)

机构地区：[1]国网辽宁省电力有限公司经济技术研究院,辽宁沈阳110015

出　　处：《东北电力技术》2017年第8期44-46,共3页Northeast Electric Power Technology

摘　　要：以基于输电线路档间舞动为正弦半波的假设,考虑气动力与导线运动的速度耦合,利用DAlembert原理建立的扇形覆冰输电导线三自由度舞动方程,并依据工程实例中的相关参数,使用MATLAB软件对覆冰导线进行数值模拟分析,研究导线起舞的风速条件下,不同攻角对扇形覆冰导线舞动特性的影响。结果表明,利用水平、垂直及轴向3个方向上的舞动振幅判断输电导线舞动临界条件与实测结果比较接近,符合Nigol舞动机理。The hypothesis of half sine wave of cable galloping in span is adopted. For the problem of fan-shaped ice cover conductorgalloping, this paper presents a flabelliform cable galloping model of three degree-of-freedom based on DAlembert Principle which con-siders the velocity coupling between air force and the cable torsional vibration. According to the relevant parameters in the project exam-ple, it uses the software Matlab for numerical simulation. To explore the flabelliform cable galloping characteristic of the wire on thecondition of the wind speed of the wire dancing in different of the angle of attack. Judging the divergence critical condition of powertransmission line used the dancing amplitude in horizontal, vertical and axial directions. It meets the galloping mechanism of Nigol. Itsproved this theory is feasible.

关 键 词：输电线路 导线舞动 攻角 数值模拟 

分 类 号：TM751[电气工程—电力系统及自动化]