A study of influencing parameters on conductor galloping for transmission lines

作者：Xu, Hong; Zhu, Kuan-Jun; Liu, Bin^*; Liu, Cao-Lan; Yang, Jia-Lun

来源：Journal of Vibroengineering, 2014, 16(1): 312-323.

• conductor galloping
• dimensionless parameter
• critical wind velocity
• damping ratio
• aerodynamic coefficient
• transmission line

Factors influencing conductor galloping are so complicated that the development of galloping theories and anti-galloping technologies for transmission lines is limited. Study on influence parameters to the galloping is crucial to investigate galloping mechanism and anti-galloping methods. In this paper, three important dimensionless parameters, damping ratio, reduced wind velocity and reduced mass ratio, are proposed by dimensionless analysis based on the conductor galloping model. The expression of galloping equivalent amplitude is derived by using the average method, and the analytic solution is obtained when the aerodynamic curve is fitted by cubic and quintic polynomials respectively. For the aerodynamic coefficients, wind tunnel testing results of three typical eccentric ice accretion shapes, D shape, U shape and airfoil shape, are introduced to analyze the influence of the dimensionless parameters to the conductor galloping. Firstly, a new formula to calculate the galloping critical wind velocity is derived, which is more accurate than the result given by Den Hartog criterion. Secondly, the influence of reduced wind velocity and damping ratio to the galloping equivalent amplitude is studied. The results have an important guidance to anti-galloping design for transmission lines.

• 出版日期2014-2
• 单位华北电力大学（保定）; 中国电力科学研究院; 华北电力大学