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《Power System Technology》 2005-24
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Analysis on Accidents Caused by Icing Damage in Hunan Power Grid in 2005 and Its Countermeasures

HUANG Qiang1,WANG Jia-hong1,OU Ming-yong2(1.Hunan Electric Power Company,Changsha 410007,Hunan Province,China;2.Hunan Electric Power Design Institute,Changsha 410007,Hunan Province,China)  
The situation of icing damage appeared in Hunan power grid around the Chinese Spring Festival in the year of 2005 and its on-site sampling data are presented.On the basis of topographic features of Hunan Province,the reason why the rain and snow mixed meteorological condition and ice-coating phenomena of transmission lines often appear in Hunan Province and the characteristics of this meteorological condition are analyzed.The statistical analysis on the micro-topographic features for the sectors where the tower failure and broken lines in 220kV and 500kV transmission lines occurred is conducted and the cause of tower failure is researched.According to the comprehensive technical measures to avoid and prevent the icing damage,the countermeasures against the icing damage for both existing and new-built transmission lines are proposed,meanwhile the authors point out that to master the ice-coating situation of transmission lines it is necessary to research the infra-red observation system and remote information transmission system actively.
【CateGory Index】: TM711
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