摘要
对于OPGW遭受雷击断股的现象,行业内外经过一段时间的研究,目前对OPGW雷击断股成因及提高OPGW耐雷水平的解决方案基本取得共识,而且这些理论分析、解决方法也都应用在实践设计中了,但认为这些认识主要集中于理论解决的定性分析上是不够的,还应从定量的数据分析方面进行研究。文章从线路年平均雷暴日入手,着手建立年平均雷暴日与电荷转移量、雷击电流的关系,提出雷击高温所产生的熔蚀能量概念,并具体研究雷击熔蚀能量对外层单丝的影响等系列定量分析,说明OPGW结构设计对提高OPGW耐雷特性的影响,以此证明此数据分析方法的可行性。
Because of OPGW cables rapid development in electric power system, the research on lightning strike performance of OPGW cables has been paid more and more attention. There is the common knowledge on the lightning strike damage mechanism and the solution of improving OPGW lightning strike performance, which has been used in practical design. But it＇s not enough to only focus on the theoretic analysis. We have to analyze data in fixed quantity. This paper establishes the relationship of annual average lightning days and transferring charge and lightning strike current, presents the concept of melt-out energy, discusses the effect of melt-out energy to single wire outside material. Data analysis shows that OPGW construction design is very important to improve the performance of enduring lighting.
出处
《电力系统通信》
2005年第8期4-8,共5页
Telecommunications for Electric Power System
关键词
OPGW
雷击断股
雷暴日
熔蚀能量
数据分析方法
OPGW
wires breakage caused by lightning strike
lightning day
melt-out energy
data analysis
