输电导线覆冰舞动机理及防治措施

通过大量文献分析总结了输电导线舞动的形成原因、舞动机理和防舞措施。结果表明: 输电导线的舞动主要取决于覆冰、风激励、线路结构和参数; 目前导线舞动机理主要有Den Hartog 垂直振动和O.Nigol扭转舞动机理, 但不能解释所有类型的舞动现象, 此外还有低阻尼系统共振和动力稳定性舞动理论; 防舞措施可采取避舞、抗舞和抑舞措施, 这可在一定程度上防止舞动危害, 而防止导线舞动的根本方法是解决导线覆冰问题。

Mechanism of Icing-Caused Conductor Galloping and Its Prevention

Through extensive literature analysis,the causes of conductor galloping,its mechanism,and prevention are summarized.Results show that the key factors of conductor galloping are icing,wind excitation,line structure and parameters;two existing major galloping mechanisms,Den Hartog's vertical vibration and O.Nigol's twisting galloping mechanisms,are unable to explain all the galloping phenomena,besides,there are low damping system resonance and dynamic stability galloping theories;preventive measures,including galloping prevention,galloping resistance,and galloping suppression measures,can effectively prevent its harm to a certain extent;the fundamental solution to galloping is solving conductor icing problem.