Research on the calculation of deviation angle of icicle build-up on insulators and its influential factor
A physical model for the calculation of deviation angle of icicle build-up on insulator is presented in this paper. Based on the force analysis on unfrozen water droplet at icicle tip, a mathematical analysis equation is obtained, which reveals the influence of wind velocity, ambient temperature, air pressure, and radius of water droplets on icicle deviation angle, as well as its constraint conditions have been obtained. Whereby the influential factors of icicle deviation angle and critical wind velocity of icicle growth have been analysed in this paper. The results show that icicle deviation angle is influenced by wind velocity, air pressure, ambient temperature and radius of water droplet at icicle tip. Among these factors, the wind velocity is the most influential one. When wind velocity increases to a certain degree, icicle will stop growing. In addition, comparing to that of the plain areas, the transmission lines acrossing high altitude regions tend to be confronted with more serious ice-cover and ice flashover problems, which is consistent with the previous experiment results.
Shu Lichun Yang Zhangang Jiang Xingliang Hu Qin Fan Xuehai
State Key Laboratory of Power Transmission Equipment and System Safety and New Technology College of Zhuzhou Electric Power Bureau Zhuzhou, Hunan, China
国际会议
The 14th International Workshop on Atmospheric Icing of Structures(第十四届结构物大气覆冰国际研讨会 IWAIS 2011)
重庆
英文
33
2011-05-08（万方平台首次上网日期，不代表论文的发表时间）