摘要
OPGW作为避雷线，遭受雷击不可避免。为避免落雷电弧烧坏光纤，国内外不少厂家在内、外层绞丝之间或与光单元之间设计留有一定空隙，给雷电流沿线传播在间隙上形成电位差、产生电弧创造了条件，一旦电弧产生，15～30V就能维持，其产生的热量，使OPGW温度上升、强度下降，形成断股。因此，OPGW雷击断股的主要原因是结构设计问题。并提出了解决方法和措施。
As the lightning wire, OPGW cant be avoided from lightning. In order to prevent the optical fiber from burning from the lightning arc both domestic and foreign manufactures have leave a gap between the internal and external strands and optical unit to a certain extent, which forms a potential difference at the gap for transmission of lightning current along the wire and creates a condition of arc generation. So the main causes for OPGW strand breakage form lightning are the structural design problems. The author gives out the solution and measures.
出处
《电力建设》
2006年第8期6-12,共7页
Electric Power Construction
关键词
OPGW
断股
结构设计
OPGW
strand breakage
structural design
