Thermodynamic model of critical ice-melting current on iced transmission lines

Thermal Science

卷:23

Mu Jing-Yu¹  Zhao Long²  Huang Xin-Bo³  Gao Hua³  Zhu Yong-Can³  Tian Yi³ 

[1] State Grid Anhui electric power company maintenance company, Hefei, P.R. China;

[2] Xidian University, College of Electro-Mechanical Engineering, Xi’an, P.R. China;

[3] Xi’an Polytechnic University, College of Electronics and Information, Xi’an, P.R. China;

关键词: transmission lines;    icing;    de-icing;    critical ice-melting current;   

DOI  :  10.2298/TSCI170916137Z

来源: DOAJ

【 摘 要 】

The thermal de-icing by Joule effect is a mostly valid way to prevent transmission-lines from the severe ice storm. A model was put forward to simulate the critical ice-melting current on iced conductor. Based on this model, the value of critical ice-melting current was calculated with various parameters, some of which were ignored in the earlier literatures, such as ice-layer heat conductivity, wind attack angle, and icing section shape. The results of the experiment and simulation show that the critical ice-melting current increase with wind speed, wind attack angle, and ice-layer heat conductivity, but decrease rapidly with ambient temperature and liquid water content. Moreover, the maximum difference between the results of simulation and experiment is about 9%, thus this model can be employed to estimate the engineering parameters in practical thermal de-icing projects.

【 授权许可】

Unknown