广东电力2017，Vol.30Issue(10)：1-5,5.DOI:10.3969/j.issn.1007-290X.2017.010.001
缠绕预绞丝的地线悬垂串温度分布实验分析
Experimental Analysis on Temperature Distribution of Ground Wire Suspension String with Winding Preformed Armor Rod
摘要
Abstract
Combined action of contact resistance and power frequency short-circuit current is the main reason for breakage of the overhead ground wire. Taking suspension string of the ground wire with winding preformed armor rod for a research ob-ject,this paper analyzes heating mechanism in terms of skin effect and contact resistance and performs verification analysis by temperature rise experiments for suspension strings of old and new ground wires. Analysis results indicate heating bottle-neck points are in the fracture of the performed armor rod and inside the clamp when power frequency short-circuit current flows through the suspension string of ground wire. And when corrosion of the suspension string causes increase of the con-tact resistance,overhigh temperature of the fracture and the clamp will cause breakage of the ground wire. Compared with suspension string of the ground wire without winding performed armor rod,heating points of the suspension string of ground wire with winding performed armor rod increase which may raise risk of breakage of the ground wire.关键词
架空地线/断线/悬垂串/预绞丝/集肤效应/接触电阻Key words
overhead ground wire/breakage/suspension string/performed armor rod/skin effect/contact resistance分类
信息技术与安全科学引用本文复制引用
郭德明,刘刚,漆海霞,张远健..缠绕预绞丝的地线悬垂串温度分布实验分析[J].广东电力,2017,30(10):1-5,5.基金项目
国家高技术研究发展计划(863计划)项目(2015AA050201) （863计划）
中国南方电网有限责任公司科技项目(GDKJQQ20161036) （GDKJQQ20161036）
