220 kV垂直排列双分裂导线粘连现象分析

为研究近年来广东省无间隔棒220kV垂直排列双分裂线路导线在负荷电流足够大时发生粘连的现象,对导线建立了精确的悬链线数学模型,比较了有限元法和解析法的优劣后用解析法在MATLAB环境下编制程序算出不同参数时子导线因电磁引力作用而粘连的临界电流值,得出了子导线粘连的临界电流随分裂间距、环境温度的增大而增大,随档距、风速的增大而减小的规律,并提出了通过控制分裂间距,档距改变临界电流大小的方法。

Analysis on Subconductors Conglutination Phenomena of 220kV Transmission Line

This paper researches the conglutination phenomena of the subconductors without spacer of 220kV vertical-arrayed double-bundle transmission-line,which happened in Guangdong,China.First funicular curve model is built,then finite-element method with analysis method and selects analysis method is compared finally.This paper analyses the relationship between the critical current and the divided distance,span,ambient temperature and wind speed, through making program in MATLAB,and summarizes the law that critical current increases with the accretion of divided distance and the increase of temperature,and decreases with the accretion of span and the rise of wind speed.Moreover this paper gives the way to enhance the critical current by changing the divided distance and the span.