2005年湖南电网冰灾事故及其应对措施研究

介绍了2005年春节前后湖南电网的冰灾情况及现场取样数据,结合湖南的地形特点分析了湖南易形成雨雪冰冻天气的原因及其特点,对220kV、500kV线路发生倒塔断线的区段(点)进行了微地形特征统计分析和倒塔原因分析,根据"避、抗、融、改、防"五字综合技术措施提出了已建线路和新建线路防冰灾事故的应对措施,同时指出为及时掌握电线的结冰情况应积极开展红外仪观测系统和远程信息传输系统的研究.

Analysis on Accidents Caused by Icing Damage in Hunan Power Grid in 2005 and Its Countermeasures

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.