摘要
在提高输电线路抗冰性能的建设中,如果设计冰厚选择过小,则在冰雪天气中输电线路可能难以抵御覆冰的侵袭;但如果设计冰厚选择过大,则线路建造或改造的投资额将成倍提高。因此,如何合理确定设计冰厚,使得线路建设同时能够满足经济性和安全性的要求,是当前线路改造和设计新的输电线路工程工作面临的重要问题。为此,分析了线径对导线覆冰的影响机理,在自然覆冰试验站现场观测了不同直径导线的覆冰情况,结合重庆大学近年在现场观测的覆冰数据,分析得到了导线覆冰厚度的直径订正系数,通过订正系数计算得到的导线覆冰厚度与现场实测冰厚的误差<6.8%,表明该系数能够较好地满足实测地区冰厚设计的要求。
In the construction of improving the anti-icing performance of transmission lines,if the designed ice thickness selection is excessively thin,it is hard for the conductors to keep safe and stable operation under icing conditions;and if the designed ice thickness selection is excessively large,the investment of the construction or reconstruction can be multiplely improved.Therefore,how to determine the reasonable designed ice thickness and to make it meet the economy and safe demands of the conductors is an important problem in the construction and reconstruction project of the transmission lines.Consequently,the influence mechanism of the diameter on the conductors icing is analyzed.According to analysis of the icing data observed in field in recent years,the diameter correction coefficient Kφ of the transmission lines icing thickness is proposed.The error of ice thickness calculated by Kφ and measured in field is less than 6.8%,showing that the proposed Kφ can well meet the demands of the ice thickness design of the transmission lines in the field measured areas.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第6期1391-1397,共7页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724501)~~
关键词
导线
覆冰
设计
现场实测
厚度
直径订正系数
conductor
icing
design
measured in field
ice thickness
diameter correction coefficient
