结冰导线舞动的迹判据  

Trace Criterion for Icing Conductor Galloping

作　　者：樊社新[1] 莫以为[1] 朱江新[1] 

机构地区：[1]广西大学机械工程学院,广西南宁530004

出　　处：《水电能源科学》2012年第8期149-150,36,共3页Water Resources and Power

基　　金：国家自然科学基金资助项目(5037706;10872053);广西自然科学基金资助项目(2011GXNSFA018131)

摘　　要：大跨越输电线路中导线的舞动是输电技术方面危害较大、防范较难的问题,深入研究覆冰舞动具有较大的现实意义。为探讨结冰输电导线发生舞动时的气动条件,针对舞动机理分析中的舞动判据问题,根据矩阵迹的性质从动力学方程的标准形式导出一种舞动的充分性判据,并根据此判据分析了舞动机理。结果表明,在气动力对攻角导数匹配的条件下,若气动升力、气动阻力、气动力矩对攻角导数产生的负阻尼与负刚度足够大,可导致舞动。Conductor galloping of long span transmission lines has larger harm to power transmission and the prevention is difficult in transmission technology. Therefore, the study of icing conductor galloping has more important realistic significance. To probe the aerodynamic conditions of icing conductor galloping based on the galloping criterion in analysis of galloping mechanism, a kind of sufficient criterion for icing conductor galloping is presented by deducing standard form of dynamics equations in terms of the matrix trace features. And then the mechanism of icing conductor galloping is analyzed. The results show that under the matching conditions of aerodynamic force derivative on attack angle, conductor galloping may be caused by infinite negative damping and negative rigidity from the lift derivative on attack angle, the re- sistance derivative on attack angle and the moment derivative on attack angle.

关 键 词：舞动 判据 负阻尼 负刚度 矩阵的迹 

分 类 号：TM723[电气工程—电力系统及自动化]