不均匀脱冰时阻尼改变对输电线跳跃高度的影响  

Influence of Damping Variation on Jump Height of Transmission Lines During Uneven Deicing

作　　者：王云帆 曹咏弘[1] 李海涛[1] 杜龙飞 许燕飞 WANG Yun-fan;CAO Yong-hong;LI Hai-tao;DU Long-fei;XU Yan-fei(School of Science, North University of China, Taiyuan 030051, China)

机构地区：[1]中北大学理学院,山西太原030051

出　　处：《中北大学学报（自然科学版）》2021年第3期232-239,共8页Journal of North University of China(Natural Science Edition)

基　　金：国网山西省电力公司科技项目(520533170007)。

摘　　要：运用试验和数值模拟的方法对实际输电线路进行了脱冰跳跃研究,得到了多种工况下输电线的脱冰跳跃位移时程曲线,在此基础上讨论了覆冰厚度、脱冰率、脱冰位置等因素对覆冰导线阻尼以及仿真准确性的影响规律.结果表明,不考虑覆冰输电线阻尼改变的脱冰跳跃仿真结果偏大,考虑阻尼改变的仿真结果更接近试验,有利于提高仿真精度;覆冰厚度增加、脱冰率减少及脱冰位置远离跨中会导致阻尼改变对档距中点位移的影响变强,仅在少数条件下可以不考虑覆冰输电线阻尼的改变.The deicing test and FEM simulation were carried out based on the actual line,and the galloping time history curve of the transmission line under different working conditions was obtained.The influence of ice thickness,ice removal rate,deicing position and other factors on the damping of iced conductor and simulation accuracy were studied.The results show that the simulation result of deicing jump without considering the damping change of the transmission line is too large,and the simulation result considering the damping change is closer to the test,which is beneficial to improve the simulation accuracy;the ice thickness increases,the ice removal rate decreases,and the ice removal location away from the mid-span will cause the change in damping to have a stronger influence on the displacement of the midpoint of the gear span.Only in a few conditions,the damping variation of the transmission line can be ignored.

关 键 词：脱冰跳跃位移 脱冰模拟试验 有限元模拟 Rayleigh阻尼 

分 类 号：TM75[电气工程—电力系统及自动化]