Complete solutions for LW maintenance of high voltage OHL

Abstract

The Live Working techniques on overhead lines are already a common place in Romanian Transmission Grid. From 1979 a lot of maintenance works where done in Live technologies. From insulators replacement to complex reparation works where done on 400 and 220kV OHL. New technologies where developed in the last period, such as replacement of anchors, mounting of monitoring systems, mounting of line arresters, replacement of ground wire, etc. From this to overlaying almost all maintenance works needed on maintenance projects of OHL's it is a small step. The paper presents actual and possible works in Live technologies for refurbishing OHLs. From common practices to modern new technologies (including robots) all Live methods should be included in maintenance to avoid the deenergizing of the line. The new tools and technologies developed in the world are taken into consideration. Finally almost all maintenance works can be done without deenergizing the line.