Discussion about 3 Kinds of Complicated Issues in Iced Conductor Design

Pointing to current design specifications of overhead lines,the paper studies 3 kinds of complicated issues related to icing impact on conductor safety:(1) ice binding on conductor should be taken as a compound material to calculate its elastic module;(2) icing adds conductor load and partial stiffness at same time,which results in double stress addition for conductor;and under certain wind effect conductor swing motion causes ice shedding or breakage,which results in sudden stiffness change of conductor,as a result,stress sudden change and concentration;(3) overhead line partial stress applied and low temperature cold shortness.The paper points out that ice shedding is the main objective cause for tower collapse through discussion about previous 3 issues.