Features of wire ice coating in Erlang Mountain

摘要

Wire ice coating is very important to electric power design. And the ice coating research in Erlang Mountain is relatively urgent to the electricity transmitting from west to east in China. The ice coating record from 2002 to 2006 by Erlang Mountain wire ice coating observation station of Southwest Electric Power Design Institute (SWEPDI) was used to analyze the diitrutition and change of the ice coationg in this area. Then the impact of meteorological factors on the ice coating was discussed in detail. The results show that the ice coating in winter mainly includes mixed freezing and the rime. The, mixed freezing relatively frequent in most months in winter except In January. But the rime occurred mainly in relatively cool months as December, January and February. The density change range of different ice coating has a little difference. The glaze has higher density than rime and mixed freezing. Then a multiple regression between the ice density and many meteorological elements was proposed. At last the impact of topography on the ice coating was interviewed by comparasion. The standard ice thickness ratio in windward is greater thanin leeward. But sometimes it is opposite in certain conditions