摘要
中国雾凇冰灾极其频发且引起输电线路事故最多,覆冰后的导线表面由于冰树枝的生长变得极为粗糙,冰树枝尖端会使得导线表面电场发生严重畸变进而增大表面场强;为研究雾凇覆冰后的导线表面电场分布规律,在多功能人工气候室内完成了对钢芯铝绞线雾凇覆冰的参数测量,根据冰树枝尖端形态建立相应的电场分布模型,再利用有限元法对尖端场强进行计算。结果表明:雾凇冰树枝尖端严重增大导线表面电场,但随着覆冰厚度的增加,导线表面场强会逐渐减小且减小速度逐渐变慢;所得结论可为雾凇频发地区的输电线路设计和选型提供理论依据。
Rime icing disaster in China was so frequent that it caused the accident of transmission line most, the surface of wire becomes extremely rough due to the growth of ice-tree by rime, and the electric field on the conductor surface will be distorted seriously by rime, moreover, field intensity will be strengthened too. Therefore, in order to explorer surface field distribution on conductor that was icing coated by rime, icing parameter of the Steel Core Aluminum Stranded wire by rime was measured in the Multi-function Artificial Climate Chamber, then electric field distribution model was established according to the shape of ice branch tip, last but not least field strength on the ice-tree tip was calculated by the finite element method. Results show that： ice branch tip can strengthen the conductor field intensity significantly, with the increasing of the thickness of the rime, field strength will decrease gradually with the rate of declining slow down. The conclusion of this paper can provide the selection reference for the overhead transmission line in rime area.
出处
《高压电器》
CAS
CSCD
北大核心
2013年第11期37-42,共6页
High Voltage Apparatus
基金
国家重点基础研究发展计划(973计划)(2009CB724502
2009CB724501)
国家重点实验室项目(2007DA10512708101
2007DA10512708102)~~
关键词
导线
雾凇
冰树枝
电场分布
有限元法
stranded conductor
rime
ice-tree
field distribution
finite element method
