摘要
对韶关电网由于冰冻天气造成的输电线路毁坏进行了调查研究,重点测量了导线覆冰情况,观察了220kV坪通线119—121号3座相邻输电线路铁塔的受损程度和倒塌形式,结合这些塔的地理位置进行分析,指出系列铁塔受破坏的原因主要是导线厚冰荷载作用引起铁塔局部破坏,进而引起相邻铁塔发生系列动力倒塌。最后,对铁塔的修复和进一步的研究内容提出了若干建议。
In this paper,icing-caused damage of transmission lines in power grid of Shaoguan,China is investigated.Upon measuring the thickness of the ice covering 220 kV Pingtong transmission line,damage and collapse types of three neighboring towers（No.119 to No.121） are studied.Considering the relative positions of the three towers,it draws a conclusion that the destruction was mainly caused by local damage of tower under the heavy ice load on wire which led to dynamic collapse of the neighboring towers.Some advice to repair these destroyed towers and to further relevant research is proposed as well.
出处
《广东电力》
2008年第5期12-14,22,共4页
Guangdong Electric Power
关键词
输电线路
铁塔
覆冰
动力倒塌
transmission line
steel tower
icing
dynamic collapse
