220kV垂直双分裂导线粘连机理及防护措施研究

Research on conglutination mechanism and preventive methods for 220kV vertical double-bundled transmission-line

介绍近年来出现的220kV线路垂直排列双分裂导线的粘连现象,指出导线粘连的危害,分析导线在电磁力、重力、内部应力等相互作用下产生粘连的机理,并指出施工工艺、直流电阻分散、气象条件等是引起粘连的主要原因;最后,提出控制施工误差、调整弧垂、安装间隔棒、建立在线监测系统等预防导线粘连的防护措施。

The conglutination phenomena of 220 kV vertical double-bundled transmission-line have been analyzed in this paper.The phenomena danger was pointed out.The conglutination mechanisms under electromagnetic force,gravity and internal stress were analyzed,and then the main factors,including construction technology,DC resistance dispersion and weather,caused conductor conglutination were deeply explained.Finally,some counter measures against the sub-conductors conglutination phenomena was given,including controlling construction errors,adjusting sag of conductor,installing spacer and establishing the on-line monitoring system.