3[1]Davidson C C,Horwill C,Granger M,et al.A Power-Electronics-Based Transmission Line De-icing System.AC and DC Power Transmission,2006,135-139.
4[2]Granger M,Dutil A,Nantel A.Performance aspects of Levis Substation De-Icing Project Using DC technology.Workshop on Atmos-pheric Icing of Structures,2005.