The Method and Test of De-icing on Four Bundled-conductors by Leading Running Current into Various Sub-conductor Combinations

摘要

In this paper, a method of de-icing on four bundledconductor by leading running current into various subconductor combination was proposed and verified by field test. The results show that by using insulative conductor spacer to separate the four bundledconductor and setuping suitable control switches on the both sides of line span which is needed de-icing, running current on bundled-conductor is leaded into one subconductor combination or one subconductor to increase the subconductor's current density and to achieve de-icing. The ice shapes and types which coats on four bundled-conductor relative to the meteorological and environment parameters. The ice melting process of four bundled-conductor includes four stages: ice layer heating, ice layer rotating, ice layer melting, ice layer unloading. Reasonable method of de-icing on four bundled-conductor by leading running current into subconductor combination can achieve ice which coats on four bundled-conductor melting and unloading, and the ice melting speed relatives to the value of current, ambient temperature, wind speed and etc. Research results can provide a reference for icing and de-icing of various bundled-conductor.