高电压技术2018，Vol.44Issue(8)：2442-2449,8.DOI:10.13336/j.1003-6520.hve.20180731002
输电线路非均匀脱冰严重工况的规律
Law of Sever Conditions of Non-uniform Ice-shedding Jumping of Transmission Lines
摘要
Abstract
Ice-shedding will cause conductor to jump up and down significantly, which may result in electrical and mechanical accidents. We established a multi-span 3 degree-of-freedom (3 DOF) dynamic model for conductor, and researched casual non-uniform ice-shedding jumping in detail. By numerical calculation, laws of casual non-uniform ice-shedding once, twice and three times were analyzed. The conclusions can be drawn as follows: the largest jump height of casual non-uniform ice-shedding is not always positioned at the middle of the span, where the ice-shedding happens; serious jumping occurs when the ice-shedding segment is located between 0.35～0.75 of the span; on the condition of settled ice-shedding amount, larger ice-shedding rate leads to greater jump heights; in the case of settled ice-shedding amount and two or more ice-shedding segments concerned, close segments bring larger jump height than separate segments; when the ice-shedding amount is settled, monolithic position of ice-shedding segments has stronger influence on jump height than the number of ice-shedding segments. Besides, the results of non-uniform ice-shedding and uniform ice-shedding are compared, demonstrating that non-uniform ice-shedding jumps with larger magnitude than uniform ice-shedding.Accordingly, casual non-uniform ice-shedding situation should be taken into account when overhead transmission line is designed.关键词
架空输电线路/随机非均匀脱冰/脱冰跳跃/跳跃幅值/严重工况Key words
over-head transmission line/casual non-uniform ice-shedding/ice-shedding jumping/jump height/sever conditions引用本文复制引用
王黎明,曹露,高亚云,王琼,李庆峰..输电线路非均匀脱冰严重工况的规律[J].高电压技术,2018,44(8):2442-2449,8.基金项目
国家自然科学基金(51377093).Project supported by National Natural Science Foundation of China(51377093). （51377093）
